CN115386736A - Method for treating laterite-nickel ore by oxygen-enriched side-blown converter - Google Patents
Method for treating laterite-nickel ore by oxygen-enriched side-blown converter Download PDFInfo
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- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 448
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 351
- 238000000034 method Methods 0.000 title claims abstract description 101
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 239000001301 oxygen Substances 0.000 title claims abstract description 92
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 92
- 239000002893 slag Substances 0.000 claims abstract description 294
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 214
- 230000004907 flux Effects 0.000 claims abstract description 119
- 239000010941 cobalt Substances 0.000 claims abstract description 105
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 105
- QXZUUHYBWMWJHK-UHFFFAOYSA-N [Co].[Ni] Chemical compound [Co].[Ni] QXZUUHYBWMWJHK-UHFFFAOYSA-N 0.000 claims abstract description 93
- 238000003723 Smelting Methods 0.000 claims abstract description 92
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 92
- 238000007664 blowing Methods 0.000 claims abstract description 82
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 64
- 230000008569 process Effects 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000012141 concentrate Substances 0.000 claims abstract description 47
- 239000003546 flue gas Substances 0.000 claims abstract description 47
- 229910000531 Co alloy Inorganic materials 0.000 claims abstract description 45
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 33
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000011593 sulfur Substances 0.000 claims abstract description 27
- 238000010791 quenching Methods 0.000 claims abstract description 19
- 230000000171 quenching effect Effects 0.000 claims abstract description 19
- 238000007670 refining Methods 0.000 claims abstract description 18
- 238000005188 flotation Methods 0.000 claims abstract description 10
- 238000007885 magnetic separation Methods 0.000 claims abstract description 6
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- 235000019738 Limestone Nutrition 0.000 claims description 30
- 239000006028 limestone Substances 0.000 claims description 30
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 20
- 239000003830 anthracite Substances 0.000 claims description 20
- 238000001035 drying Methods 0.000 claims description 20
- 239000010453 quartz Substances 0.000 claims description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- 238000000926 separation method Methods 0.000 claims description 19
- 239000010440 gypsum Substances 0.000 claims description 18
- 229910052602 gypsum Inorganic materials 0.000 claims description 18
- 239000004575 stone Substances 0.000 claims description 18
- 239000000571 coke Substances 0.000 claims description 17
- 238000010790 dilution Methods 0.000 claims description 17
- 239000012895 dilution Substances 0.000 claims description 17
- 229910052742 iron Inorganic materials 0.000 claims description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 15
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims description 13
- 229910052683 pyrite Inorganic materials 0.000 claims description 13
- 239000011028 pyrite Substances 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 10
- 239000003921 oil Substances 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical group OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 8
- 239000003345 natural gas Substances 0.000 claims description 8
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
- 239000011707 mineral Substances 0.000 claims description 6
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- 239000000295 fuel oil Substances 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 239000010742 number 1 fuel oil Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 claims description 2
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 229940116411 terpineol Drugs 0.000 claims description 2
- 239000005864 Sulphur Substances 0.000 claims 2
- 239000012190 activator Substances 0.000 claims 1
- 238000000227 grinding Methods 0.000 abstract description 17
- 229910052751 metal Inorganic materials 0.000 abstract description 17
- 239000002184 metal Substances 0.000 abstract description 17
- 239000008188 pellet Substances 0.000 abstract description 9
- 150000002739 metals Chemical class 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 description 28
- 230000009467 reduction Effects 0.000 description 21
- 229910001710 laterite Inorganic materials 0.000 description 20
- 239000011504 laterite Substances 0.000 description 20
- 238000006722 reduction reaction Methods 0.000 description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 17
- 238000011084 recovery Methods 0.000 description 17
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- 239000011734 sodium Substances 0.000 description 16
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- 238000006477 desulfuration reaction Methods 0.000 description 10
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- 238000006297 dehydration reaction Methods 0.000 description 6
- 239000002918 waste heat Substances 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 229910000863 Ferronickel Inorganic materials 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- -1 nickel-cobalt-aluminum Chemical compound 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- KOPMZTKUZCNGFY-UHFFFAOYSA-N 1,1,1-triethoxybutane Chemical compound CCCC(OCC)(OCC)OCC KOPMZTKUZCNGFY-UHFFFAOYSA-N 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 3
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 3
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 3
- KOVPITHBHSZRLT-UHFFFAOYSA-N 2-methylpropoxymethanedithioic acid Chemical compound CC(C)COC(S)=S KOVPITHBHSZRLT-UHFFFAOYSA-N 0.000 description 2
- WVYWICLMDOOCFB-UHFFFAOYSA-N 4-methyl-2-pentanol Chemical group CC(C)CC(C)O WVYWICLMDOOCFB-UHFFFAOYSA-N 0.000 description 2
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical group CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- IDTYIZVHFFKWAD-UHFFFAOYSA-N hexoxymethanedithioic acid Chemical compound CCCCCCOC(S)=S IDTYIZVHFFKWAD-UHFFFAOYSA-N 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005453 pelletization Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 102100036439 Amyloid beta precursor protein binding family B member 1 Human genes 0.000 description 1
- 101000928670 Homo sapiens Amyloid beta precursor protein binding family B member 1 Proteins 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical group CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910001053 Nickel-zinc ferrite Inorganic materials 0.000 description 1
- 239000004435 Oxo alcohol Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- UOJYYXATTMQQNA-UHFFFAOYSA-N Proxan Chemical compound CC(C)OC(S)=S UOJYYXATTMQQNA-UHFFFAOYSA-N 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- KFDQGLPGKXUTMZ-UHFFFAOYSA-N [Mn].[Co].[Ni] Chemical compound [Mn].[Co].[Ni] KFDQGLPGKXUTMZ-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 150000008052 alkyl sulfonates Chemical class 0.000 description 1
- 229940077388 benzenesulfonate Drugs 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229910000428 cobalt oxide Inorganic materials 0.000 description 1
- 229910000361 cobalt sulfate Inorganic materials 0.000 description 1
- 229940044175 cobalt sulfate Drugs 0.000 description 1
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- DGXKDBWJDQHNCI-UHFFFAOYSA-N dioxido(oxo)titanium nickel(2+) Chemical compound [Ni++].[O-][Ti]([O-])=O DGXKDBWJDQHNCI-UHFFFAOYSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- PYZLRNMGUBDIHK-UHFFFAOYSA-N molecular hydrogen;nickel Chemical compound [Ni].[H][H] PYZLRNMGUBDIHK-UHFFFAOYSA-N 0.000 description 1
- NQNBVCBUOCNRFZ-UHFFFAOYSA-N nickel ferrite Chemical compound [Ni]=O.O=[Fe]O[Fe]=O NQNBVCBUOCNRFZ-UHFFFAOYSA-N 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- 229910000159 nickel phosphate Inorganic materials 0.000 description 1
- JOCJYBPHESYFOK-UHFFFAOYSA-K nickel(3+);phosphate Chemical compound [Ni+3].[O-]P([O-])([O-])=O JOCJYBPHESYFOK-UHFFFAOYSA-K 0.000 description 1
- QWENMOXLTHDKDL-UHFFFAOYSA-M pentoxymethanedithioate Chemical compound CCCCCOC([S-])=S QWENMOXLTHDKDL-UHFFFAOYSA-M 0.000 description 1
- QWENMOXLTHDKDL-UHFFFAOYSA-N pentoxymethanedithioic acid Chemical group CCCCCOC(S)=S QWENMOXLTHDKDL-UHFFFAOYSA-N 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
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- 238000011946 reduction process Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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- 238000005486 sulfidation Methods 0.000 description 1
- 230000014233 sulfur utilization Effects 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- JSPLKZUTYZBBKA-UHFFFAOYSA-N trioxidane Chemical compound OOO JSPLKZUTYZBBKA-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/005—Preliminary treatment of ores, e.g. by roasting or by the Krupp-Renn process
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/02—Obtaining nickel or cobalt by dry processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for treating laterite-nickel ore by an oxygen-enriched side-blown furnace, belonging to the technical field of smelting. The method comprises the following steps: reducing and vulcanizing a furnace charge consisting of a laterite-nickel ore pellet, a vulcanizing agent 1, a reducing agent 1 and a fusing agent 1 in an oxygen-enriched side-blowing furnace to obtain cobalt-poor low-nickel matte 1, smelting slag and flue gas; after water quenching, the poor-cobalt low-nickel matte 1 is added with a flux 2 to enter an air refining process to obtain cobalt-rich high-nickel matte, air refining slag and flue gas; the obtained smelting slag and converting slag are further depleted and separated by a settling electric furnace, and the obtained nickel-cobalt alloy and cobalt-rich low-nickel sulfur/cobalt-poor low-nickel matte nickel-cobalt concentrate obtained by crushing, grinding, flotation and magnetic separation of the obtained electric furnace slag enter a converting process, so that valuable metals such as nickel, cobalt and the like can be effectively enriched, the latent heat of the smelting slag and the converting slag is fully utilized, and the utilization rate of the laterite-nickel ore is improved.
Description
Technical Field
The invention belongs to the technical field of metallurgical engineering, and particularly relates to a method for treating laterite-nickel ore by an oxygen-enriched side-blown furnace.
Background
The nickel metal has wide application, can be used for manufacturing various metal materials such as heat-resistant alloy steel, nickel alloy, stainless steel and the like, can be used as a hydrogenation catalyst in chemical reaction of petrochemical industry, can be used for electroplating according to the rust resistance and good metal luster of nickel, can be used for manufacturing dyes and pigments according to nickel cobalt aluminate solid solution, nickel phosphate, nickel titanate and the like, can be used for manufacturing coloring agents in ceramic industry, can be used for manufacturing various ferrites such as nickel ferrite, nickel zinc ferrite and the like, and can be used for manufacturing Fe-Ni, cd-Ni batteries, H2-Ni sealed batteries, nickel sulfate battery grade materials and ternary precursor materials.
With the vigorous development of the new energy power electric vehicle industry, the yield of new energy vehicles is rapidly increased year by year, the development prospect and the market growth space of new energy vehicles in the future are huge, the demand of the new energy markets for nickel, cobalt and the like is increased year by year, and nickel-based anodes such as nickel-manganese-cobalt, nickel-cobalt-aluminum and the like occupy the main share in the electric vehicle battery market. Currently, indonesia is utilizing its huge resource of nickel reserves of lateritic nickel ores to stimulate investment production of battery grade metals, or at least one nickel, which can then be processed into sulfate, entering the battery cathode. The nickel sulfate is mainly obtained by wet treatment of high-grade matte, and the main pyrogenic process production process of the high-grade matte comprises the following steps: laterite-nickel ore → pre-reduction roasting → reduction smelting → ferronickel → sulfuration → nickel matte; the production cases of nickel matte obtained by producing ferronickel and then vulcanizing the ferronickel are as follows: the successful development of a 'rotary kiln vulcanization-ore-smelting electric furnace' method by the Indonesia corporation of the fresh water valley in the 20 th century and the 70 th century has the defects of severe operating environment, low sulfur utilization rate and the need of adding a rotary kiln flue gas desulfurization system; and the new 'RKEF ferronickel sulfidation method' developed by the ridonia Eramet SLN nickel smelter, disadvantage: still need electric furnace melting, lead to energy consumption height, with high costs, the process is complicated.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for treating laterite-nickel ore by using an oxygen-enriched side-blown furnace, which removes the rotary kiln prereduction roasting link in the traditional laterite-nickel ore smelting method, directly adds the laterite-nickel ore after crushing, drying and pelletizing the laterite-nickel ore into the side-blown furnace for reduction, vulcanization and smelting to produce poor-cobalt low-grade nickel matte, saves the manufacturing cost and the energy consumption cost of a rotary kiln system, shortens the smelting process flow of the laterite-nickel ore, and can ensure that the production is rapid, continuous and large-scale.
In order to realize the purpose, the invention adopts the technical scheme that: a method for processing laterite-nickel ore by an oxygen-enriched side-blown furnace comprises the following steps:
s1: drying the laterite-nickel ore to ensure that the water content of the laterite-nickel ore is 12-23%;
s2: mixing the dried laterite-nickel ore, a vulcanizing agent 1, a flux 1 and a reducing agent 1, and performing ball pressing and molding to obtain laterite-nickel ore balls;
s3: smelting furnace burden consisting of laterite-nickel ore balls, a vulcanizing agent 1, a reducing agent 1 and a fusing agent 1 to obtain poor-cobalt low-nickel matte 1, smelting slag and flue gas; after water quenching, adding a flux 2 into the poor-cobalt low-nickel matte 1 to enter an air refining process to obtain cobalt-rich high-nickel matte, air refining slag and flue gas;
s4: adding a flux 3 into the smelting slag, and then carrying out dilution separation to obtain cobalt-poor low-nickel matte 2, electric furnace slag 1 and flue gas; the electric furnace slag 2 is crushed, ground and then subjected to flotation to obtain nickel-cobalt concentrate 1 and tailings 1; carrying out magnetic separation on the tailings 1 to obtain nickel-cobalt alloy 1 and tailings 2; the poor cobalt low nickel matte 2, the nickel-cobalt concentrate 1 and the nickel-cobalt alloy 1 enter an air refining process;
s5: vulcanizing agent 2, reducing agent 2 and fusing agent 4 in the converting slag, and then carrying out dilution and separation to obtain cobalt-rich low-nickel sulfur, electric furnace slag 2 and flue gas; the electric furnace slag 2 is crushed, ground and then subjected to flotation to obtain nickel-cobalt concentrate 2 and tailings 3; carrying out magnetic separation on the tailings 3 to obtain nickel-cobalt alloy 2 and tailings 4; and the cobalt-rich low-nickel sulfur, the nickel-cobalt concentrate 2 and the nickel-cobalt alloy 2 enter an air refining process.
Further, at least one of the following (a) to (e):
(a) The laterite-nickel ore comprises the following main chemical components: 0.6 to 3 percent of Ni, 0.01 to 1.1 percent of Co, 20 to 41 percent of Fe, 1.3 to 15 percent of MgO, and SiO 2 10％～45％；
(b) The main chemical components of the cobalt-poor low-nickel matte 1 are as follows: 11 to 30 percent of Ni, 0.1 to 1.3 percent of Co, 35 to 63 percent of Fe and 6 to 28 percent of S;
(c) The smelting slag comprises the following main chemical components: 0.15 to 0.6 percent of Ni, 0.006 to 0.01 percent of Co and 30 to 45 percent of Fe;
(d) The cobalt-rich nickelic matte comprises the following main chemical components: 58 to 81 percent of Ni, 1.1 to 4.3 percent of Co and 8 to 15 percent of S;
(e) The main chemical components of the blowing slag are as follows: 1.3 to 2.4 percent of Ni, 0.06 to 0.27 percent of Co and 20 to 65 percent of Fe.
Further, the vulcanizing agent 1 is at least one of gypsum, pyrite, sulfur and sulfur-containing minerals; the flux 1 is at least one of limestone and quartz stone; the reducing agent 1 is at least one of anthracite, coke, semi-coke and graphite powder.
Further, in the step S2, the mass of the vulcanizing agent 1 is 8-25% of that of the laterite-nickel ore, the mass of the flux 1 is 3-15% of that of the laterite-nickel ore, and the mass of the reducing agent 1 is 3-18% of that of the laterite-nickel ore.
Further, in the step S3, the mass of the vulcanizing agent 1 is 3% -12% of the mass of the laterite-nickel ore balls, the mass of the flux 1 is 1% -10% of the mass of the laterite-nickel ore balls, and the mass of the reducing agent 1 is 1% -9% of the mass of the laterite-nickel ore balls.
Further, in the step S3, during the smelting, fuel, oxygen and compressed air are introduced, the purity of the oxygen is 90% to 98%, the volume concentration of the oxygen in the oxygen-enriched air is 60% to 80%, the excess coefficient of the fuel is 75% to 90%, the total smelting coefficient is 76% to 100%, the smelting temperature is 1230 ℃ to 1600 ℃, and the fuel is at least one of natural gas, pulverized coal and heavy oil.
Further, in step S3, the blowing rate in the blowing step is 12000Nm 3 /h～30000Nm 3 And/h, the blowing temperature is 1220-1330 ℃, the blowing time is 1-2 h, the flux 2 is quartz stone, and the dosage of the flux 2 is 2-11% of the mass of the cobalt-poor nickel-poor matte particles obtained after water quenching.
In step S4, the temperature of the dilution and separation is 1250 to 1450 ℃, the flux 3 is at least one of limestone and quartz stone, and the mass of the flux 3 is 2 to 6 percent of the mass of the smelting slag.
Further, in step S5, the temperature of the dilution and separation is 1250 to 1450 ℃, the flux 4 is limestone, and the mass of the flux 3 is 2 to 6 percent of the mass of the smelting slag; the vulcanizing agent 2 is at least one of gypsum, pyrite, sulfur and sulfur-containing minerals, and the mass of the vulcanizing agent 2 is 6-13% of that of the converting slag; the reducing agent 2 is at least one of anthracite, coke, semi-coke and graphite powder, and the mass of the reducing agent 2 is 2-8% of the mass of the blowing slag.
Further, the flotation in the step S4 and the step S5 requires adding a collector, a foaming agent and an activating agent; the collecting agent is at least one of xanthate and black powder; the foaming agent is at least one of 2# oil, alcohol, methyl isobutyl carbinol and terpineol oil; the activating agent is Na 2 S。
Compared with the prior art, the invention has the beneficial effects that:
(1) The method removes the rotary kiln prereduction roasting link in the traditional laterite-nickel ore smelting method, directly adds the laterite-nickel ore into a side-blown furnace after crushing, drying and pelletizing to reduce, sulfurize and smelt and produce poor cobalt and low nickel matte, saves the manufacturing cost and energy consumption cost of a rotary kiln system, shortens the laterite-nickel ore smelting process flow, and can ensure that the production is rapid, continuous and large-scale.
(2) The method can effectively enrich and extract valuable metals such as nickel, cobalt and the like, and utilizes the property that the affinity of metallic nickel to sulfur is close to that of iron, and the affinity to oxygen is far less than that of iron, so that the valuable metals are subjected to matte smelting in different oxidation degreesReacting nickel and cobalt oxide under the action of a vulcanizing agent to generate Ni 3 S 2 And CoS, and iron sulfide is continuously oxidized into oxide by stages and then is removed by slagging with gangue; the method has the characteristics of strong adaptability to materials, suitability for various smelting slag types, low requirements on the types and properties of fuel, reducing agent and vulcanizing agent, good safety and environmental protection, investment saving, short process flow, low labor intensity, high thermal efficiency, low comprehensive energy consumption and the like.
(3) Adding a flux into smelting slag to adjust components of the smelting slag, adopting a settling electric furnace to perform dilution separation and enrich poor-cobalt low-nickel matte, cooling, crushing, grinding and floating the obtained electric furnace slag 1 to obtain nickel-cobalt concentrate 1 and tailings 1, and magnetically separating nickel-cobalt alloy 1 and tailings 2 from the tailings 1; the blowing slag is reduced, vulcanized and smelted by adopting a settling electric furnace to produce cobalt-rich low nickel matte and electric furnace slag 2, the electric furnace slag 2 is cooled, crushed, ground and floated to obtain nickel-cobalt concentrate 2 and tailings 3, and the tailings 3 are magnetically separated to obtain nickel-cobalt alloy 2 and tailings 4; the method can effectively remove impurities and enrich valuable metals such as nickel and cobalt, has simple process, can fully utilize the latent heat of smelting slag and converting slag, and can recycle the produced tailings.
(4) The following calculation results are obtained through ingredient calculation, material balance calculation and heat balance calculation: the nickel recovery rate of the whole system is 91-99%, the cobalt recovery rate is 90-98%, and the economic value is high.
Drawings
Fig. 1 is a process flow chart of the method for treating the laterite-nickel ore by the oxygen-enriched side-blown furnace.
Detailed Description
To better illustrate the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to specific embodiments and the accompanying drawings.
The existing method for preparing nickel and sulfur from laterite-nickel ore needs to add a rotary kiln flue gas desulfurization system, and has high energy consumption, high cost and complex process.
In view of the above, the present invention proposes the following technical solutions. According to an exemplary embodiment of the invention, a method for processing laterite-nickel ore by an oxygen-enriched side-blown furnace is provided. Referring to fig. 1, the method includes the steps of:
s1: drying the laterite-nickel ore to ensure that the water content of the laterite-nickel ore is 12-23%;
s2: mixing the dried laterite-nickel ore, a vulcanizing agent 1, a flux 1 and a reducing agent 1, and performing ball pressing and molding to obtain laterite-nickel ore balls;
s3: smelting furnace burden consisting of laterite-nickel ore balls, a vulcanizing agent 1, a reducing agent 1 and a fusing agent 1 to obtain poor-cobalt low-nickel matte 1, smelting slag and flue gas; after water quenching, adding a flux 2 into the poor-cobalt low-nickel matte 1, and performing an air refining process to obtain cobalt-rich high-nickel matte, air refining slag and flue gas;
s4: adding a flux 3 into the smelting slag, and then carrying out dilution separation to obtain cobalt-poor low-nickel matte 2, electric furnace slag 1 and flue gas; the electric furnace slag 2 is crushed, ground and then subjected to flotation to obtain nickel-cobalt concentrate 1 and tailings 1; carrying out magnetic separation on the tailings 1 to obtain nickel-cobalt alloy 1 and tailings 2; the poor cobalt low nickel matte 2, the nickel-cobalt concentrate 1 and the nickel-cobalt alloy 1 enter an air refining process;
s5: after a vulcanizing agent 2, a reducing agent 2 and a fusing agent 4 are added into the converting slag, dilution and separation are carried out to obtain cobalt-rich low-nickel sulfur, electric furnace slag 2 and flue gas; the electric furnace slag 2 is crushed, ground and then subjected to flotation to obtain nickel-cobalt concentrate 2 and tailings 3; magnetically separating the tailings 3 to obtain nickel-cobalt alloy 2 and tailings 4; and the cobalt-rich low-nickel sulfur, the nickel-cobalt concentrate 2 and the nickel-cobalt alloy 2 enter an air refining process.
By applying the technical scheme of the invention, an oxygen-enriched side blowing furnace is adopted for smelting reduction in the nickel-sulfur preparation process, then blowing is carried out to obtain cobalt-enriched high-nickel matte, the obtained smelting slag and the blowing slag are further depleted and separated by a settling electric furnace, the obtained electric furnace slag is subjected to crushing, grinding, flotation and magnetic separation to obtain nickel-cobalt alloy and cobalt-enriched low-nickel sulfur/cobalt-depleted low-nickel matte nickel-cobalt concentrate, and then the nickel-cobalt alloy and cobalt-enriched low-nickel sulfur/cobalt-depleted low-nickel matte nickel-cobalt concentrate enters a blowing process, so that valuable metals such as nickel, cobalt and the like can be effectively enriched, the latent heat of the smelting slag and the blowing slag is fully utilized, and the utilization rate of the laterite-nickel ore is improved.
According to the invention, the laterite-nickel ore, the vulcanizing agent 1, the flux 1 and the reducing agent 1 are configured into balls, so that the vulcanizing effect of the laterite-nickel ore can be improved. The dried laterite-nickel ore has a large amount of fine ore powder, and the laterite-nickel ore is easy to be sucked into a flue when directly entering a furnace, so that a large amount of smoke is formed, and the vulcanization is not facilitated; the vulcanizing agent is easy to volatilize, the vulcanizing agent needs to be vulcanized under the action of carbon, if the raw materials are not pressed into balls, the vulcanizing agent volatilizes, more vulcanizing agents are needed, the vulcanizing time is prolonged, the cost is increased, and meanwhile, the vulcanizing effect of the laterite-nickel ore can be reduced.
In order to further improve the recovery rate of the nickel-containing material, in a preferred embodiment, the laterite-nickel ore is subjected to a crushing and screening process before being subjected to a drying process, the crushing apparatus may be an apparatus commonly used in the art, such as a jaw crusher, a gyratory crusher, etc., and the D of the crushed laterite-nickel ore is subjected to a crushing and screening process 90 =0.5 mm-6 mm, the laterite-nickel ore comprises the following main chemical components: 0.6 to 3 percent of Ni, 0.01 to 1.1 percent of Co, 20 to 41 percent of Fe, 1.3 to 15 percent of MgO, and SiO 2 10 to 45 percent. The dried laterite-nickel ore is sent into a disc granulator through a belt conveyer, mixed with a vulcanizing agent 1, a flux 1 and a reducing agent 1 for granulation, the obtained laterite-nickel ore pellets are continuously sent into an oxygen-enriched side-blowing furnace from the top of the oxygen-enriched side-blowing furnace through the belt conveyer, and the air quantity of each ton of laterite-nickel ore pellets is 100Nm 3 /t～600Nm 3 /t。
In a typical embodiment of the present invention, the vulcanizing agent 1 is at least one of gypsum, pyrite, sulfur, and sulfur-containing minerals; the fusing agent 1 is at least one of limestone and quartz stone; the reducing agent 1 is at least one of anthracite, coke, semi-coke and graphite powder.
In a typical embodiment of the invention, in the granulation process, the mass of the vulcanizing agent 1 is 8-25% of the mass of the laterite-nickel ore, the mass of the flux 1 is 3-15% of the mass of the laterite-nickel ore, and the mass of the reducing agent 1 is 3-18% of the mass of the laterite-nickel ore.
In order to further improve the reduction and vulcanization effects of the laterite-nickel ore, a vulcanizing agent 1, a flux 1, a reducing agent 1, fuel, oxygen and air are also required to be added in the reduction and vulcanization process in the oxygen-enriched side-blown furnace; the mass of the vulcanizing agent 1 is 3-12% of that of the laterite nickel ore ball, the mass of the flux 1 is 1-10% of that of the laterite nickel ore ball, and the mass of the reducing agent 1 is 1-9% of that of the laterite nickel ore ball; the purity of the oxygen is 90-98%, and the fuel is at least one of natural gas, pulverized coal and heavy oil. The vulcanizing agent 1, the flux 1 and the reducing agent 1 are continuously fed into the oxygen-enriched side-blowing furnace from the top of the oxygen-enriched side-blowing furnace by a belt conveyer; fuel, oxygen and compressed air are injected into a molten pool of the oxygen-enriched side-blown converter from a spray gun port on the side body of the converter body, the oxygen-enriched air intensively stirs a melt, and the part above the air nozzle forms flocculation flow motion; the mixed materials are rapidly melted and dispersed under the action of the strongly stirred melt, so that a good heat transfer and mass transfer process is realized, and the laterite-nickel ore is fully reduced and vulcanized with the reducing agent, the vulcanizing agent 1 and the flux 1 to generate poor-cobalt low-nickel sulfur, smelting slag and flue gas. The poor-cobalt low-nickel sulfur and the smelting slag flow into a siphon chamber for further separation, the smelting slag is discharged from a slag hole and flows into a settling electric furnace through a chute, and the poor-cobalt low-nickel sulfur is continuously discharged from the siphon hole and is sent into a converter for converting. Smoke generated by smelting enters a waste heat boiler through a smoke outlet at the top of the furnace, saturated steam generated by the waste heat boiler is sent to a power generation procedure for power generation, and partial waste heat can be sent to a drying kiln for baking the laterite-nickel ore. The flue gas at the outlet of the preheating boiler is subjected to dust collection by an electric dust collector and a cloth bag dust collector, and the dust-removed flue gas is subjected to desulfurization and denitrification and then is discharged after reaching the standard.
Preferably, the main chemical components of the cobalt-poor nickel matte 1 are: 11 to 30 percent of Ni, 0.1 to 1.3 percent of Co, 35 to 63 percent of Fe and 6 to 28 percent of S; the smelting slag comprises the following main chemical components: 0.15 to 0.6 percent of Ni, 0.006 to 0.01 percent of Co and 30 to 45 percent of Fe.
In a typical embodiment of the invention, during the smelting process, the smelting temperature in the oxygen-enriched side blowing furnace is 1230-1600 ℃, the volume concentration of oxygen in the oxygen-enriched air in the oxygen-enriched side blowing furnace is 60-80%, the excess coefficient of fuel is 75-90%, and the total smelting coefficient is 76-100%. Under the conditions, on one hand, the method is favorable for saving energy, and on the other hand, the method is favorable for improving the selective reduction of nickel, thereby preparing for obtaining the cobalt-rich high-nickel sulfur. In addition, the heat balance is achieved by adjusting the volume concentration of oxygen in the oxygen-enriched air and the excess coefficient of the fuel, and the oxygen-enriched air has a better reduction atmosphere and is beneficial to deep reduction.
Preferably, the blowing amount in the blowing step is 12000Nm 3 /h～30000Nm 3 And/h, the blowing temperature is 1220-1330 ℃, the blowing time is 1-2 h, the flux 2 is quartz stone, and the dosage of the flux 2 is 2-11% of the mass of the cobalt-poor nickel-poor matte particles obtained after water quenching.
Under the conditions, high-grade nickel sulfur and blowing slag can be obtained, and the cobalt-rich high-nickel matte comprises the following main chemical components: 58 to 81 percent of Ni, 1.1 to 4.3 percent of Co and 8 to 15 percent of S; the main chemical components of the blowing slag are as follows: 1.3 to 2.4 percent of Ni, 0.06 to 0.27 percent of Co and 20 to 65 percent of Fe.
In a typical embodiment of the invention, the smelting slag continuously flows into a settling electric furnace through a chute, and by means of resistance heat and arc heat generated by an electrode inserted into the melt, the matte and slag mixture discharged from the side blowing furnace is subjected to heat preservation, clarification and dilution separation so as to achieve the purpose of separating matte from slag; adding a flux 3 to adjust slag components, controlling the temperature to 1250-1450 ℃, gradually raising the liquid level of the mixed melt along with the passage of slag discharge time, continuously separating valuable metal mattes such as nickel and cobalt in the melt from the slag and settling to the bottom of the furnace for enrichment, and discontinuously discharging the cobalt-poor and nickel-poor mattes to a bottom blowing furnace or a converter for blowing through a metal discharge port;
preferably, the flux 3 is at least one of limestone and quartz stone, and the mass of the flux 3 is 2-6% of the mass of the smelting slag.
The electric furnace slag 1 is discharged into a slag ladle through a slag hole, is transported to a slag ladle field by using a slag ladle vehicle for natural cooling for 42-50 h, and is cooled for 25-35 h by water spraying until the electric furnace slag 1 is completely cooled; and crushing and grinding the completely cooled electric furnace slag 1 to-200 meshes or-300 meshes to prepare raw slag ore, adding a collecting agent, a foaming agent and an activating agent into the raw slag ore to float and separate nickel-cobalt concentrate 1 and tailings 1, and magnetically separating nickel-cobalt alloy 1 and tailings 2 from the tailings 1. And returning the nickel-cobalt concentrate 1 and the nickel-cobalt alloy 1 generated by the system to a bottom blowing furnace or a converter for blowing operation.
Preferably, the collecting agent is one or more of xanthate, nigre, fatty acid, alkyl sulfonate or kerosene, and the dosage of the collecting agent is one ton of the collecting agentAdding 50 g-200 g of raw slag ore; the foaming agent is one or more of 2# oil, alcohol, methyl isobutyl carbinol and triethoxy butane, and the amount of the foaming agent is 20-50 g added in each ton of raw slag ore; the activating agent is Na 2 S, the dosage of the activating agent is 50-300 g added in each ton of raw slag ore.
Preferably, the xanthate is at least one of ethylxanthate, butylxanthate, isopropylxanthate, isobutylxanthate, pentylxanthate and hexylxanthate, and those skilled in the art can select the xanthate to be used according to actual needs without being limited to the above description.
Preferably, the jettison is at least one of phenol jettison, alcohol jettison and oxoalcohol jettison, and the jettison used can be selected by those skilled in the art according to actual needs without being limited to the above description.
In a typical embodiment of the invention, the converting slag continuously flows into a settling electric furnace through a chute, a vulcanizing agent 2, a reducing agent and a fusing agent 4 are added according to actual conditions, the temperature of the electric furnace is controlled to be 1250-1450 ℃, and nickel and cobalt oxides react to generate Ni under the action of the vulcanizing agent 4 in the matte smelting process with different oxidation degrees by utilizing the property that the affinity of metallic nickel to sulfur is close to that of iron and the affinity to oxygen is far less than that of iron 3 S 2 And CoS, and iron sulfide is continuously oxidized into oxide in stages and then removed by slagging with gangue.
Preferably, the fusing agent 4 is limestone, and the mass of the fusing agent 3 is 2-6% of the mass of the smelting slag; the vulcanizing agent 2 is at least one of gypsum, pyrite, sulfur and sulfur-containing minerals, and the mass of the vulcanizing agent 2 is 6-13% of that of the converting slag; the reducing agent 2 is at least one of anthracite, coke, semi-coke and graphite powder, and the mass of the reducing agent 2 is 2-8% of the mass of the converting slag.
Finally, reducing and vulcanizing by a settling electric furnace to generate cobalt-rich low-nickel matte, electric furnace slag 2 and flue gas, returning the cobalt-rich low-nickel matte to a bottom blowing furnace or a converter for converting, discharging the electric furnace slag 2 into a slag ladle through a slag hole, transferring the slag ladle to a slag ladle field by using a slag ladle truck for natural cooling for 35-45 h, and spraying water for cooling for 20-32 h until the electric furnace slag 2 is completely cooled; and crushing and grinding the completely cooled electric furnace slag 2 to-200 meshes or-300 meshes to prepare raw slag ore, adding a collecting agent, a foaming agent and an activating agent into the raw slag ore to float and separate nickel-cobalt concentrate 2 and tailings 3, and magnetically separating nickel-cobalt alloy 2 and tailings 4 from the tailings 3. And returning the nickel-cobalt concentrate 2 and the nickel-cobalt alloy 2 generated by the system to a bottom blowing furnace or a converter for blowing operation.
Preferably, the collecting agent is one or more of xanthate and black powder, and the using amount of the collecting agent is 50-200 g added in each ton of raw slag ore; the foaming agent is one or more of 2# oil, alcohol, methyl isobutyl carbinol and triethoxy butane, and the dosage of the foaming agent is 20-50 g added in each ton of raw slag ore; the activating agent is Na 2 S, the dosage of the activating agent is 50-300 g added in each ton of raw slag ore.
Casting the cobalt-rich high-nickel matte into a cobalt-rich high-nickel matte block through a casting system, and carrying out wet treatment on the cobalt-rich high-nickel matte block to obtain nickel sulfate and a cobalt sulfate battery-grade material to manufacture a new energy battery; the nickel-cobalt concentrate 1 and the nickel-cobalt concentrate 2 are returned to a bottom blowing furnace or a converter for blowing to recover valuable metals such as nickel, cobalt and the like; the tailings 2 and 4 are directly sold for steel making or used as electromagnetic functional materials; flue gas generated by the side-blown converter, the converting furnace and the electric settling furnace enters the waste heat boiler through a smoke outlet at the furnace top, saturated steam generated by the waste heat boiler is sent to a power generation procedure for power generation, and partial waste heat can be sent to the drying kiln for baking the laterite-nickel ore. Smoke dust of outlet flue gas of the preheating boiler is collected by an electric dust collector and a cloth bag dust collector, and the dust-removed flue gas is discharged after desulfurization and denitrification to reach the standard; the collected smoke dust can return to the mixing and granulating process to participate in the batching and granulating, or directly return to the side-blown converter to participate in the reduction vulcanization smelting.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically indicated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
Example 1
A method for directly treating laterite-nickel ore by using an oxygen-enriched side-blown furnace comprises the following specific steps:
(1) Carrying out crushing and screening treatment on the laterite-nickel ore by a jaw crusher, wherein the granularity of more than 91 percent of the crushed laterite-nickel ore is 1mm; then deeply removing free water in a drying kiln, wherein the water content of the laterite-nickel ore after drying and dehydration is 15%, and the laterite-nickel ore comprises the following main chemical components: ni 2.13%, co 0.12%, fe 30.57%, mgO 9.87%, siO 2 24.61％；
(2) Conveying the dried laterite-nickel ore obtained in the step (1) to a disc granulator through a belt conveyor, adding a vulcanizing agent 1, a flux 1 and a reducing agent according to the ingredient calculation, mixing the laterite-nickel ore with the vulcanizing agent 1, the flux 1, the reducing agent and smoke dust, and granulating to obtain laterite-nickel ore balls, wherein the balling rate is 98%, and the diameter of each laterite-nickel ore ball is 14mm; wherein the vulcanizing agent 1 is gypsum, and the addition amount of the vulcanizing agent 1 is 10 percent of the mass of the laterite-nickel ore; the flux 1 is limestone, and the addition amount of the flux 1 is 8 percent of the mass of the laterite nickel ore; the reducing agent 1 is anthracite, and the addition amount of the reducing agent 1 is 5% of the mass of the laterite-nickel ore;
(3) Continuously adding the laterite-nickel ore balls obtained in the step (2), a vulcanizing agent 1, a reducing agent 1 and a fusing agent 1 into an oxygen-enriched side-blowing furnace from the top of the oxygen-enriched side-blowing furnace through a metering belt scale, wherein the air quantity of each ton of laterite-nickel ore balls is 200Nm 3 The method comprises the following steps that (1) fuel, oxygen and compressed air are injected into a molten pool of an oxygen-enriched side-blown furnace from a lance nozzle on the side body of a furnace body to be smelted, and cobalt-poor low-nickel matte 1, smelting slag and flue gas are obtained; wherein the purity of oxygen is 98 percent, the volume concentration of oxygen in the oxygen-enriched air in the oxygen-enriched side-blown furnace is 80 percent, the surplus coefficient of fuel is 88 percent, the total smelting coefficient of the oxygen-enriched side-blown furnace is 90 percent, the smelting temperature is 1500 ℃, and the reduction vulcanization time is continuous feeding; the fuel is natural gas, and the adding amount of the fuel is 30 percent of the mass of the laterite nickel ore balls; the reducing agent is anthracite, and the addition amount of the reducing agent is 6 percent of the mass of the laterite-nickel ore balls; the vulcanizing agent 1 is gypsum, and the adding amount of the vulcanizing agent 1 is 10 percent of the mass of the laterite-nickel ore balls; the flux 1 is limestone, and the addition amount of the flux 1 is laterite nickel ore spheroids4% of the amount; the main chemical components of the cobalt-poor low-nickel matte 1 are as follows: ni18.29%, co0.27%; fe56.84% and S20.68%; the smelting slag comprises the following main chemical components: ni0.25%, co0.007%, fe40.83%;
after the obtained poor-cobalt low-nickel matte 1 is subjected to water quenching by a water quenching system, the poor-cobalt low-nickel matte is stored in a nickel matte bin in a low nickel matte particle form, the poor-cobalt low-nickel matte is added into a bottom blowing furnace or a converter through a belt conveyer, compressed air is blown in, a flux 2 is added, and the iron-removing, desulfurization, slagging and blowing operations are carried out for 1.3h at the temperature of 1260 ℃ to produce high-cobalt high nickel matte, blowing slag and flue gas; wherein the blowing-in amount of the compressed air is 2450 Nm 3 H; the flux 2 is quartz stone, the dosage of the flux 2 is 6% of the mass of the low nickel matte particles, and the main chemical components of the high-cobalt high-nickel matte are as follows: ni76.39%, co2.81%, S8.36%; the blowing slag comprises the following main chemical components: ni1.38%, co0.13% and Fe65%;
(4) Continuously flowing the smelting slag produced in the step (3) into a settling electric furnace through a chute, adding a fusing agent 3 to adjust the temperature to 1290 ℃, and performing dilution and separation to obtain cobalt-poor low-nickel matte 2, electric furnace slag 1 and flue gas; the obtained poor cobalt low nickel matte 2 is intermittently fed into the converting process through a metal discharge port;
discharging the obtained electric furnace slag 1 into a slag ladle through a slag hole, then transporting the electric furnace slag to a slag ladle field by using a slag ladle vehicle for natural cooling for 42h, and then spraying water for cooling for 25h until the electric furnace slag 1 is completely cooled; crushing and grinding the completely cooled electric furnace slag 1 to-200 meshes to prepare raw slag ore, adding a collecting agent, a foaming agent and an activating agent into the raw slag ore to float out nickel-cobalt concentrate 1 and tailings 1, magnetically separating the tailings 1 to obtain nickel-cobalt alloy 1 and tailings 2, and sending the obtained nickel-cobalt concentrate 1 and nickel-cobalt alloy 1 to a converting process; wherein the flux 3 is limestone, and the addition amount of the flux 3 is 3 percent of the mass of the smelting slag; the collecting agent is amyl xanthate, and the using amount of the collecting agent is 60g/t; the foaming agent is 2# oil, and the using amount of the foaming agent is 25g/t; the activating agent is Na 2 S, the using amount of the activating agent is 70g/t;
(5) Continuously flowing the converting slag produced in the step (3) into a settling electric furnace through a chute, adding a vulcanizing agent 2, a reducing agent and a fusing agent 4, controlling the temperature of the electric furnace to 1350 ℃, carrying out reduction vulcanization to generate cobalt-rich low-nickel matte, electric furnace slag 2 and flue gas, and conveying the obtained cobalt-rich low-nickel matte into a converting process;
discharging the obtained electric furnace slag 2 into a slag ladle through a slag hole, then transporting the electric furnace slag to a slag ladle field by using a slag ladle vehicle for natural cooling for 38 hours, and then spraying water for cooling for 25 hours until the electric furnace slag 2 is completely cooled; crushing and grinding the completely cooled electric furnace slag 2 to-200 meshes to prepare raw slag ore, adding a collecting agent, a foaming agent and an activating agent into the raw slag ore to float and separate nickel-cobalt concentrate 2 and tailings 3, magnetically separating the tailings 3 to obtain nickel-cobalt alloy 2 and tailings 4, and sending the obtained nickel-cobalt concentrate 2 and nickel-cobalt alloy 2 to a converting process; wherein the vulcanizing agent 2 is pyrite, and the adding amount of the vulcanizing agent 2 is 10 percent of the weight of the blowing slag; the flux 4 is limestone, and the addition amount of the flux 4 is 3 percent of the mass of the blowing slag; the reducing agent 2 is anthracite, and the adding amount of the reducing agent 2 is 4% of the weight of the blowing slag; the collecting agent is butyl black powder, and the using amount of the collecting agent is 70g/t; the foaming agent is methyl isobutyl carbinol, and the dosage of the foaming agent is 30g/t; the activating agent is Na 2 S, the dosage of the activating agent is 90g/t.
The method comprises the following steps of calculating ingredients, material balance and heat balance: in this example, the recovery rate of nickel was 98.58% and the recovery rate of cobalt was 95.37%.
Example 2
A method for directly treating laterite-nickel ore by using an oxygen-enriched side-blown furnace comprises the following specific steps:
(1) Crushing and screening the laterite-nickel ore by a jaw crusher, wherein the granularity of more than 93 percent of the crushed laterite-nickel ore is 2m; then deeply removing free water in a drying kiln, wherein the water content of the laterite-nickel ore after drying and dehydration is 21%, and the laterite-nickel ore comprises the following main chemical components: ni 2.46%, co0.09%, fe38.73%, mgO10.57%, siO 2 29.43％。
(2) Conveying the dried laterite-nickel ore obtained in the step (1) to a disc granulator through a belt conveyor, adding a vulcanizing agent 1, a flux 1 and a reducing agent according to the ingredient calculation, mixing the laterite-nickel ore with the vulcanizing agent 1, the flux 1, the reducing agent and smoke dust by controlling the rotation speed of the disc granulator, and granulating to obtain laterite-nickel ore balls, wherein the balling rate is 98%, and the diameter of the laterite-nickel ore balls is 29mm; wherein the vulcanizing agent 1 is pyrite, and the addition of the vulcanizing agent 1 is 13 percent of the mass of the laterite-nickel ore; the flux 1 is quartz, and the addition amount of the flux 1 is 9 percent of the mass of the laterite-nickel ore; the reducing agent 1 is coke, and the addition amount of the reducing agent 1 is 7 percent of the mass of the laterite-nickel ore;
(3) Continuously adding the laterite nickel ore pellets obtained in the step (2), a vulcanizing agent 1, a reducing agent 1 and a fusing agent 1 into an oxygen-enriched side-blowing furnace from the top of the oxygen-enriched side-blowing furnace through a metering belt scale, wherein the air quantity allocated to each ton of laterite nickel ore pellets is 300Nm 3 The fuel, oxygen and compressed air are blown into a molten pool of the oxygen-enriched side-blown furnace from a lance port on the side body of the furnace body for smelting to obtain poor-cobalt low-nickel matte 1, smelting slag and flue gas; wherein the purity of oxygen is 94%, the volume concentration of oxygen in the oxygen-enriched air in the oxygen-enriched side-blown furnace is 75%, the surplus coefficient of fuel is 83%, the total smelting coefficient of the oxygen-enriched side-blown furnace is 88%, the smelting temperature is 1550 ℃, and the reduction vulcanization time is continuous feeding; the fuel is pulverized coal, and the adding amount of the fuel is 25 percent of the mass of the laterite nickel ore balls; the reducing agent is coke, and the addition amount of the reducing agent is 6 percent of the mass of the laterite-nickel ore balls; the vulcanizing agent 1 is pyrite, and the addition of the vulcanizing agent 1 is 7% of the mass of the laterite-nickel ore balls; the flux 1 is quartz stone, and the addition amount of the flux 1 is 4% of the mass of the laterite-nickel ore balls. The main chemical components of the cobalt-poor low-nickel matte 1 are as follows: ni17.92%, co0.89%, fe42.1% and S19.38%. The main chemical components of the smelting slag are as follows: ni0.18%, co0.008% and Fe40.24%;
after water quenching of the obtained poor-cobalt low-nickel matte 1 by a water quenching system, storing the poor-cobalt low-nickel matte 1 in a nickel matte bin in a low nickel matte particle form, adding the poor-cobalt low-nickel matte into a bottom blowing furnace or a converter through a belt conveyer, blowing compressed air, adding a flux 2, and carrying out deferrization, desulfurization, slagging and converting operation for 1.5 hours at the temperature of 1240 ℃ to produce high-cobalt high-nickel matte, converting slag and flue gas; wherein the blowing amount of the compressed air is 25600Nm 3 H; the flux 2 is quartz stone, the dosage of the flux 2 is 8% of the mass of the low nickel matte particles, and the main chemical components of the high cobalt and high nickel matte are as follows: ni71.58%, co2.47%, S13.46%; the blowing slag comprises the following main chemical components: ni1.84%, co0.14% and Fe20%;
(4) Continuously flowing the smelting slag produced in the step (3) into a settling electric furnace through a chute, adding a fusing agent 3, adjusting the temperature to 1300 ℃, and performing dilution and separation to obtain cobalt-poor nickel-poor matte 2, electric furnace slag 1 and flue gas; the obtained poor cobalt low nickel matte 2 is intermittently fed into the converting process through a metal discharge port;
discharging the obtained electric furnace slag 1 into a slag ladle through a slag hole, then transporting the electric furnace slag to a slag ladle field by using a slag ladle vehicle for natural cooling for 46h, and then spraying water for cooling for 27h until the electric furnace slag 1 is completely cooled; crushing and grinding the completely cooled electric furnace slag 1 to-200 meshes to prepare raw slag ore, adding a collecting agent, a foaming agent and an activating agent into the raw slag ore to float out a nickel-cobalt concentrate 1 and tailings 1, magnetically separating the tailings 1 to obtain a nickel-cobalt alloy 1 and tailings 2, and feeding the obtained nickel-cobalt concentrate 1 and the nickel-cobalt alloy 1 to a converting process; the flux 3 is quartz stone, and the addition amount of the flux 3 is 4% of the mass of the smelting slag; the collecting agent is pentyl black powder, and the using amount of the collecting agent is 100g/t; the foaming agent is ethanol, and the dosage of the foaming agent is 40g/t; the activating agent is Na 2 S, the using amount of the activating agent is 120g/t;
(5) Continuously flowing the converting slag produced in the step (3) into a settling electric furnace through a chute, adding a vulcanizing agent 2, a reducing agent 2 and a fusing agent 4, controlling the temperature of the electric furnace to 1400 ℃, carrying out reduction vulcanization to generate cobalt-rich low-nickel matte, electric furnace slag 2 and flue gas, and sending the obtained cobalt-rich low-nickel matte into a converting process;
discharging the obtained electric furnace slag 2 into a slag ladle through a slag hole, transporting the electric furnace slag to a slag ladle field by using a slag ladle vehicle for natural cooling for 39h, and then spraying water for cooling for 25h until the electric furnace slag 2 is completely cooled; crushing and grinding the completely cooled electric furnace slag 2 to-200 meshes to prepare raw slag ore, adding a collecting agent, a foaming agent and an activating agent into the raw slag ore to float and separate nickel-cobalt concentrate 2 and tailings 3, magnetically separating the tailings 3 to obtain nickel-cobalt alloy 2 and tailings 4, and sending the obtained nickel-cobalt concentrate 2 and nickel-cobalt alloy 2 to a converting process; wherein the vulcanizing agent 2 is pyrite, and the adding amount of the vulcanizing agent 2 is 13% of the mass of the blowing slag; the flux 4 is limestone, and the addition amount of the flux 4 is 5 percent of the mass of the blowing slag; the reducing agent 2 is coke, and the adding amount of the reducing agent 2 is 8% of the mass of the blowing slag; the collecting agent is butyl xanthate, and the using amount of the collecting agent is 78g/t; the foaming agent is triethylThe dosage of the oxybutane and the foaming agent is 33g/t; the activating agent is Na 2 S, the dosage of the activating agent is 128g/t.
The method comprises the following steps of calculating ingredients, material balance and heat balance: in this example, the recovery rate of nickel was 95.64% and the recovery rate of cobalt was 94.35%.
Example 3
A method for directly treating laterite-nickel ore by using an oxygen-enriched side-blown furnace comprises the following specific steps:
(1) Crushing and screening the laterite-nickel ore by a jaw crusher, wherein the granularity of more than 94 percent of the crushed laterite-nickel ore is 2.5mm; then deeply removing free water in a drying kiln, wherein the water content of the laterite-nickel ore after drying and dehydration is 23%, and the laterite-nickel ore comprises the following main chemical components: ni 2.57%, co0.17%, fe36.94%, mgO12.49%, siO 2 30.68％；
(2) Conveying the dried laterite-nickel ore obtained in the step (1) to a disc granulator through a belt conveyor, adding a vulcanizing agent 1, a flux 1 and a reducing agent according to the ingredient calculation, mixing the laterite-nickel ore with the vulcanizing agent 1, the flux 1, the reducing agent and smoke dust, and granulating to obtain laterite-nickel ore balls, wherein the balling rate is 98%, and the diameter of the laterite-nickel ore balls is 30mm; wherein, the vulcanizing agent 1 is gypsum and sulfur, and the adding amount of the vulcanizing agent 1 is 14 percent of the mass of the laterite-nickel ore; the flux 1 is limestone and quartz stone, and the addition amount of the flux 1 is 9.5 percent of the mass of the laterite nickel ore; the reducing agent 1 is anthracite and semi-coke, and the addition amount of the reducing agent 1 is 11 percent of the mass of the laterite-nickel ore;
(3) Continuously adding the laterite-nickel ore balls obtained in the step (2), a vulcanizing agent 1, a reducing agent and a fusing agent 1 into an oxygen-enriched side-blown smelting furnace from the top of a side-blown furnace through a metering belt scale, wherein the air volume of each ton of laterite-nickel ore balls is 400Nm 3 The method comprises the following steps that (1) fuel, oxygen and compressed air are injected into a molten pool of an oxygen-enriched side-blown furnace from a lance nozzle on the side body of a furnace body to be smelted, and cobalt-poor low-nickel matte 1, smelting slag and flue gas are obtained; wherein the purity of the oxygen is 95.5 percent, the volume concentration of the oxygen in the oxygen-enriched air in the oxygen-enriched side-blown furnace is 68.5 percent, the surplus coefficient of the fuel is 87 percent, the total melting coefficient of the oxygen-enriched side-blown furnace is 89.5 percent, the melting temperature is 1490 ℃, and the method also comprises the steps ofThe original vulcanization time is continuous feeding; the fuel is natural gas and heavy oil, and the adding amount of the fuel is 32 percent of the mass of the laterite nickel ore balls; the reducing agent is anthracite and graphite powder, and the addition amount of the reducing agent is 6.5 percent of the mass of the laterite-nickel ore balls; the vulcanizing agent 1 is gypsum and pyrite, and the adding amount of the vulcanizing agent 1 is 7.6 percent of the mass of the laterite-nickel ore balls; the flux 1 is limestone and quartz, and the addition amount of the flux 1 is 8.6 percent of the mass of the laterite nickel ore balls; the main chemical components of the cobalt-poor low-nickel matte 1 are as follows: ni17.66%, co0.15%, fe56.22%, S21.34%; the smelting slag comprises the following main chemical components: ni0.36%, co0.009%, fe41.37%;
after water quenching of the obtained poor-cobalt low-nickel matte 1 by a water quenching system, storing the poor-cobalt low-nickel matte in a nickel matte cabin in a low nickel matte particle form, adding the poor-cobalt low-nickel matte into a bottom blowing furnace or a converter through a belt conveyer, blowing compressed air, adding a flux 2, and carrying out deferrization, desulfurization, slagging and converting operation for 2 hours at the temperature of 1320 ℃ to produce high-cobalt high-nickel matte, converting slag and flue gas; wherein the compressed air is blown in at a rate of 28000Nm 3 H; the flux 2 is quartz stone, the dosage of the flux 2 is 9.5 percent of the mass of the low nickel matte particles, and the main chemical components of the high cobalt and high nickel matte are as follows: ni70.29%, co2.13%, S14.28%; the blowing slag comprises the following main chemical components: ni2.4%, co0.26% and Fe40%;
(4) Continuously flowing the smelting slag produced in the step (3) into a settling electric furnace through a chute, adding a fusing agent 3 to adjust the temperature to 1330 ℃, and performing dilution separation to obtain cobalt-poor low-nickel matte 2, electric furnace slag 1 and flue gas; the obtained poor cobalt low nickel matte 2 is intermittently fed into the converting process through a metal discharge port;
discharging the obtained electric furnace slag 1 into a slag ladle through a slag hole, transferring the electric furnace slag to a slag ladle field by using a slag ladle vehicle for natural cooling for 44 hours, and then spraying water for cooling for 31 hours until the electric furnace slag 1 is completely cooled; crushing and grinding the completely cooled electric furnace slag 1 to-200 meshes or-300 meshes to prepare raw slag ore, adding a collecting agent, a foaming agent and an activating agent into the raw slag ore to float and separate nickel-cobalt concentrate 1 and tailings 1, and magnetically separating nickel-cobalt alloy 1 and tailings 2 from the tailings 1; feeding the obtained nickel-cobalt concentrate 1 and the nickel-cobalt alloy 1 into an air refining process; wherein the flux 3 is limestone, and the addition amount of the flux 3 is the mass of the smelting slag3.7% of; the collecting agent is hexyl xanthate, and the using amount of the collecting agent is 150g/t; the foaming agent is 2# oil, and the dosage of the foaming agent is 50g/t; the activating agent is Na 2 S, the using amount of an activating agent is 200g/t;
(5) Continuously flowing the converting slag produced in the step (3) into a settling electric furnace through a chute, adding a vulcanizing agent 2, a reducing agent and a fusing agent 4, controlling the temperature of the electric furnace to 1450 ℃, carrying out reduction vulcanization to generate cobalt-rich low-nickel matte, electric furnace slag 2 and flue gas, and sending the obtained cobalt-rich low-nickel matte into a converting process;
discharging the obtained electric furnace slag 2 into a slag ladle through a slag hole, then transporting the electric furnace slag to a slag ladle field by using a slag ladle vehicle for natural cooling for 41 hours, and then cooling the electric furnace slag 2 for 32 hours by spraying water until the electric furnace slag 2 is completely cooled; crushing and grinding the completely cooled electric furnace slag 2 to-200 meshes to prepare raw slag ore, adding a collecting agent, a foaming agent and an activating agent into the raw slag ore to float and separate nickel-cobalt concentrate 2 and tailings 3, and magnetically separating nickel-cobalt alloy 2 and tailings 4 from the tailings 3; feeding the obtained nickel-cobalt concentrate 2 and the nickel-cobalt alloy 2 into an air refining process; wherein the vulcanizing agent 2 is pyrite, and the addition amount of the vulcanizing agent 2 is 8.5 percent of the mass of the blowing slag; the flux 4 is limestone, and the addition amount of the flux 4 is 5.6 percent of the mass of the blowing slag; the reducing agent 2 is anthracite and semi-coke, and the adding amount of the reducing agent 2 is 7.5 percent of the mass of the blowing slag; the collecting agent is kerosene, and the using amount of the collecting agent is 135g/t; the foaming agent is triethoxy butane, and the using amount of the foaming agent is 42g/t; the activating agent is Na 2 S, the amount of the activating agent is 185g/t.
The method comprises the following steps of calculating ingredients, material balance and heat balance: in this example, the recovery rate of nickel was 94.33% and the recovery rate of cobalt was 93.75%.
Example 4
(1) Crushing and screening the laterite-nickel ore by a jaw crusher, wherein the granularity of more than 90 percent of the crushed laterite-nickel ore is 0.5mm; then deeply removing free water in a drying kiln, wherein the water content of the laterite-nickel ore after drying and dehydration is 12%, and the laterite-nickel ore comprises the following main chemical components: ni0.6%, co0.01, fe41%, mgO1.3%, siO 2 10％。
(2) Conveying the dried laterite-nickel ore obtained in the step (1) to a disc granulator through a belt conveyor, adding a vulcanizing agent 1, a flux 1 and a reducing agent according to the ingredient calculation, mixing the laterite-nickel ore with the vulcanizing agent 1, the flux 1, the reducing agent and smoke dust, and granulating to obtain laterite-nickel ore balls, wherein the balling rate is 98%, and the diameter of each laterite-nickel ore ball is 12mm; wherein the vulcanizing agent 1 is gypsum, and the addition amount of the vulcanizing agent 1 is 8 percent of the mass of the laterite-nickel ore; the flux 1 is limestone, and the addition amount of the flux 1 is 3 percent of the mass of the laterite nickel ore; the reducing agent 1 is anthracite, and the addition amount of the reducing agent 1 is 3% of the mass of the laterite-nickel ore;
(3) Continuously adding the laterite-nickel ore balls obtained in the step (2), a vulcanizing agent 1, a reducing agent and a fusing agent 1 into an oxygen-enriched side-blown smelting furnace from the top of a side-blown furnace through a metering belt scale, wherein the air volume of each ton of laterite-nickel ore balls is 100Nm 3 The method comprises the following steps that (1) fuel, oxygen and compressed air are injected into a molten pool of an oxygen-enriched side-blown furnace from a lance nozzle on the side body of a furnace body to be smelted, and cobalt-poor low-nickel matte 1, smelting slag and flue gas are obtained; wherein the purity of oxygen is 90%, the volume concentration of oxygen in the oxygen-enriched air in the oxygen-enriched side-blown furnace is 60%, the surplus coefficient of fuel is 75%, the total melting coefficient of the oxygen-enriched side-blown furnace is 76%, the melting temperature is 1230 ℃, and the reduction vulcanization time is continuous feeding; the fuel is natural gas, and the adding amount of the fuel is 25 percent of the mass of the laterite nickel ore balls; the reducing agent 1 is graphite powder, and the addition amount of the reducing agent 1 is 1% of the mass of the laterite-nickel ore balls; the vulcanizing agent 1 is gypsum, and the adding amount of the vulcanizing agent 1 is 3 percent of the mass of the laterite-nickel ore balls; the flux is limestone, and the addition amount of the flux 2 is 1 percent of the mass of the laterite nickel ore balls; the main chemical components of the cobalt-poor low-nickel matte 1 are as follows: ni11%, co0.1%, fe63%, S28%; the smelting slag comprises the following main chemical components: ni0.15%, co0.006%, fe30%;
after water quenching of the obtained cobalt-poor low-nickel matte 1 by a water quenching system, storing the cobalt-poor low-nickel matte in a nickel matte bin in the form of low nickel matte particles, adding the nickel matte into a bottom blowing furnace or a converter through a belt conveyer, blowing compressed air, adding a flux 2, and carrying out deferrization, desulfurization, slagging and converting operation for 1h at the temperature of 1220 ℃ to produce high-cobalt high-nickel matte, converting slag and flue gas; wherein the blowing-in amount of the compressed air is 12000Nm 3 H; the flux 2 is quartz stone, and the flux 2The dosage is 2 percent of the mass of the low nickel matte particles, and the main chemical components of the high cobalt and high nickel matte are as follows: ni58%, co1.1% and S15%; the blowing slag comprises the following main chemical components: ni1.3%, co0.06%, fe58.94%;
(4) Continuously flowing the smelting slag produced in the step (3) into a settling electric furnace through a chute, adding a flux 3 to adjust the components of the slag, controlling the temperature to 1250 ℃, and performing dilution and separation to obtain cobalt-poor nickel-low matte 2, electric furnace slag 1 and flue gas; the obtained poor-cobalt low-nickel matte 2 is intermittently fed into an converting process through a metal discharge port;
discharging the obtained electric furnace slag 1 into a slag ladle through a slag hole, then transporting the electric furnace slag to a slag ladle field by using a slag ladle vehicle for natural cooling for 42h, and then spraying water for cooling for 25h until the electric furnace slag 1 is completely cooled; crushing and grinding the completely cooled electric furnace slag 1 to-300 meshes to prepare raw slag ore, adding a collecting agent, a foaming agent and an activating agent into the raw slag ore to float and separate nickel-cobalt concentrate 1 and tailings 1, and magnetically separating nickel-cobalt alloy 1 and tailings 2 from the tailings 1; feeding the obtained nickel-cobalt concentrate 1 and the nickel-cobalt alloy 1 into an air refining process; wherein the flux 3 is limestone, and the addition amount of the flux 3 is 2 percent of the mass of the smelting slag; the collecting agent is pentyl black powder, and the using amount of the collecting agent is 50g/t; the foaming agent is 2# oil, and the using amount of the foaming agent is 20g/t; the activating agent is Na 2 S, the using amount of the activating agent is 50g/t;
(5) Continuously flowing the converting slag produced in the step (3) into a settling electric furnace through a chute, adding a vulcanizing agent 2, a reducing agent and a fusing agent 4, controlling the temperature of the electric furnace to 1250 ℃, carrying out reduction vulcanization to generate cobalt-rich low-nickel matte, electric furnace slag 2 and flue gas, and sending the obtained cobalt-rich low-nickel matte into a converting process; discharging the obtained electric furnace slag 2 into a slag ladle through a slag hole, transporting the electric furnace slag to a slag ladle field by using a slag ladle vehicle for natural cooling for 35 hours, and then spraying water for cooling for 20 hours until the electric furnace slag 2 is completely cooled; crushing and grinding the completely cooled electric furnace slag 2 to-300 meshes to prepare raw slag ore, adding a collecting agent, a foaming agent and an activating agent into the raw slag ore to float and separate nickel-cobalt concentrate 2 and tailings 3, magnetically separating the tailings 3 to obtain nickel-cobalt alloy 2 and tailings 4, and sending the obtained nickel-cobalt concentrate 2 and nickel-cobalt alloy 2 to a converting process; wherein the vulcanizing agent 2 is gypsum, and the adding amount of the vulcanizing agent 2 is 6 percent of the weight of the converting slag; the flux 4 is limestone, and the addition amount of the flux 4Is 1 percent of the mass of the blowing slag; the reducing agent 2 is anthracite, and the adding amount of the reducing agent 2 is 2% of the weight of the blowing slag; the collecting agent is isobutyl xanthate, and the using amount of the collecting agent is 50g/t; the foaming agent is methyl isobutyl carbinol, and the dosage of the foaming agent is 20g/t; the activating agent is Na 2 S, the dosage of the activating agent is 50g/t.
The method comprises the following steps of calculating ingredients, material balance and heat balance: in this example, the recovery rate of nickel was 91.00% and the recovery rate of cobalt was 90.00%.
Example 5
(1) Crushing and screening the laterite-nickel ore by a jaw crusher, wherein the granularity of more than 90 percent of the crushed laterite-nickel ore is 6mm; then deeply removing free water in a drying kiln, wherein the water content of the laterite-nickel ore after drying and dehydration is 23%, and the laterite-nickel ore comprises the following main chemical components: ni 3%, co1.1%, fe20%, mgO15%, siO 2 45％；
(2) Conveying the dried laterite-nickel ore obtained in the step (1) to a disc granulator through a belt conveyor, adding a vulcanizing agent 1, a flux 1 and a reducing agent according to the mixture calculation, mixing the laterite-nickel ore, the vulcanizing agent 1, the flux 1, the reducing agent and smoke dust, and granulating to obtain laterite-nickel ore balls, wherein the granulation rate is 98%, and the diameter of the laterite-nickel ore balls is 33mm; wherein the vulcanizing agent 1 is gypsum, and the addition amount of the vulcanizing agent 1 is 25 percent of the mass of the laterite-nickel ore; the flux 1 is limestone, and the addition amount of the flux 1 is 15 percent of the mass of the laterite nickel ore; the reducing agent 1 is anthracite, and the addition amount of the reducing agent 1 is 18 percent of the mass of the laterite-nickel ore;
(3) Continuously adding the laterite-nickel ore pellet obtained in the step (2), a vulcanizing agent 1, a reducing agent and a fusing agent 1 into an oxygen-enriched side-blown smelting furnace from the top of a side-blown furnace through a metering belt scale, wherein the air quantity of each ton of laterite-nickel ore pellet is 600Nm 3 The method comprises the following steps that (1) fuel, oxygen and compressed air are injected into a molten pool of an oxygen-enriched side-blown furnace from a lance nozzle on the side body of a furnace body to be smelted, and cobalt-poor low-nickel matte 1, smelting slag and flue gas are obtained; wherein the purity of the oxygen is 98 percent, the volume concentration of the oxygen in the oxygen-enriched air in the oxygen-enriched side-blown furnace is 80 percent, the excess coefficient of the fuel is 90 percent, the total smelting coefficient of the oxygen side-blown furnace is 100 percent, and the smelting coefficient isThe smelting temperature is 1600 ℃, and the reduction vulcanization time is continuous feeding; the fuel is natural gas, and the adding amount of the fuel is 50% of the mass of the laterite nickel ore balls; the reducing agent is anthracite, and the addition amount of the reducing agent is 9 percent of the mass of the laterite-nickel ore balls; the vulcanizing agent 1 is gypsum, and the adding amount of the vulcanizing agent 1 is 12 percent of the mass of the laterite-nickel ore balls; the flux 1 is limestone, and the addition amount of the flux 1 is 10 percent of the mass of the laterite nickel ore balls; the main chemical components of the cobalt-poor low-nickel matte 1 are as follows: 30% of Ni, 1.3% of Co1, 35% of Fe and 6% of S; the smelting slag comprises the following main chemical components: ni0.6%, co0.01% and Fe45%;
after water quenching of the obtained poor-cobalt low-nickel matte 1 by a water quenching system, storing the poor-cobalt low-nickel matte in a nickel matte cabin in a low nickel matte particle form, adding the poor-cobalt low-nickel matte into a bottom blowing furnace or a converter through a belt conveyer, blowing compressed air, adding a flux 2, and carrying out deferrization, desulfurization, slagging and converting operation for 2 hours at the temperature of 1330 ℃ to produce high-cobalt high-nickel matte, converting slag and flue gas; wherein the blowing amount of the compressed air is 30000Nm 3 H; the flux 2 is quartz stone, the dosage of the flux 2 is 11% of the mass of the low nickel matte particles, and the main chemical components of the high-cobalt high-nickel matte are as follows: ni81%, co4.3% and S8%; the blowing slag comprises the following main chemical components: ni2.4%, co0.27%, and Fe60%;
(4) Continuously flowing the high-temperature smelting slag produced in the step (3) into a settling electric furnace through a chute, adding a flux 3 to adjust the components of the slag, controlling the temperature to 1450 ℃, and performing dilution separation to obtain cobalt-poor nickel-low matte 2, electric furnace slag 1 and flue gas; the obtained poor cobalt low nickel matte 2 is intermittently fed into the converting process through a metal discharge port;
discharging the obtained electric furnace slag 1 into a slag ladle through a slag hole, transporting the electric furnace slag to a slag ladle field by using a slag ladle vehicle for natural cooling for 50h, and then spraying water for cooling for 35h until the electric furnace slag 1 is completely cooled; crushing and grinding the completely cooled electric furnace slag 1 to-300 meshes to prepare raw slag ore, adding a collecting agent, a foaming agent and an activating agent into the raw slag ore to float and separate nickel-cobalt concentrate 1 and tailings 1, and magnetically separating nickel-cobalt alloy 1 and tailings 2 from the tailings 1; feeding the obtained nickel-cobalt concentrate 1 and the nickel-cobalt alloy 1 into an air refining process; wherein the flux 3 is limestone, and the addition amount of the flux 3 is 6 percent of the mass of the smelting slag; the collecting agent is keroseneThe using amount of the collecting agent is 200g/t; the foaming agent is ethanol, and the dosage of the foaming agent is 50g/t; the activating agent is Na 2 S, the using amount of the activating agent is 300g/t;
(5) Continuously flowing the converting slag produced in the step (3) into a settling electric furnace through a chute, adding a vulcanizing agent 2, a reducing agent and a fusing agent 4, controlling the temperature of the electric furnace to 1450 ℃, carrying out reduction vulcanization to generate cobalt-rich low-nickel matte, electric furnace slag 2 and flue gas, and sending the obtained cobalt-rich low-nickel matte into a converting process; discharging the obtained electric furnace slag 2 into a slag ladle through a slag hole, transporting the electric furnace slag to a slag ladle field by using a slag ladle vehicle for natural cooling for 45h, and then spraying water for cooling for 32h until the electric furnace slag 2 is completely cooled; crushing and grinding the completely cooled electric furnace slag 2 to-200 meshes to prepare raw slag ore, adding a collecting agent, a foaming agent and an activating agent into the raw slag ore to float and separate nickel-cobalt concentrate 2 and tailings 3, magnetically separating the tailings 3 to obtain nickel-cobalt alloy 2 and tailings 4, and sending the obtained nickel-cobalt concentrate 2 and nickel-cobalt alloy 2 to a converting process; wherein the vulcanizing agent 2 is gypsum, and the adding amount of the vulcanizing agent 2 is 13 percent of the mass of the blowing slag; the flux 4 is limestone, and the addition amount of the flux 4 is 6 percent of the mass of the blowing slag; the reducing agent 2 is anthracite, and the adding amount of the reducing agent 2 is 8% of the mass of the blowing slag; the collecting agent is sodium alkyl benzene sulfonate, and the using amount of the collecting agent is 200g/t; the foaming agent is 2# oil, and the dosage of the foaming agent is 50g/t; the activating agent is Na 2 S, the amount of the foaming agent is 300g/t.
The method comprises the following steps of calculating ingredients, material balance and heat balance: in this example, the recovery rate of nickel was 99.00% and the recovery rate of cobalt was 98.00%.
Comparative example 1
A method for directly treating laterite-nickel ore by using an oxygen-enriched side-blown furnace comprises the following specific steps:
(1) Crushing and screening the laterite-nickel ore by a jaw crusher, wherein the granularity of more than 70 percent of the crushed laterite-nickel ore is 8mm; then deeply removing free water in a drying kiln, wherein the water content of the laterite-nickel ore after drying and dehydration is 25%, and the laterite-nickel ore comprises the following main chemical components: ni 2.38%, co0.09%, fe39.94%, mgO13.5%, siO 2 40.36％；
(2) Conveying the dried laterite-nickel ore obtained in the step (1) to a disc granulator through a belt conveyor, adding a vulcanizing agent 1, a flux 1 and a reducing agent according to the ingredient calculation, mixing the laterite-nickel ore with the vulcanizing agent 1, the flux 1, the reducing agent and smoke dust, and granulating to obtain laterite-nickel ore balls, wherein the balling rate is 98%, and the diameter of each laterite-nickel ore ball is 36mm; wherein the vulcanizing agent 1 is gypsum, and the addition amount of the vulcanizing agent 1 is 4 percent of the mass of the laterite-nickel ore; the flux 1 is limestone, and the addition amount of the flux 1 is 18 percent of the mass of the laterite-nickel ore; the reducing agent 1 is anthracite, and the addition amount of the reducing agent 1 is 20% of the mass of the laterite-nickel ore;
(3) Continuously adding the laterite-nickel ore pellet obtained in the step (2), a vulcanizing agent 1, a reducing agent and a fusing agent 1 into an oxygen-enriched side-blown smelting furnace from the top of a side-blown furnace through a metering belt scale, wherein the air quantity of each ton of laterite-nickel ore pellet is 50Nm 3 The fuel, oxygen and compressed air are blown into a molten pool of the oxygen-enriched side-blown furnace from a lance port on the side body of the furnace body for smelting to obtain poor-cobalt low-nickel matte 1, smelting slag and flue gas; wherein the purity of oxygen is 80%, the volume concentration of oxygen in the oxygen-enriched air in the oxygen-enriched side-blown furnace is 50%, the excess coefficient of fuel is 70%, the total smelting coefficient of the oxygen-enriched side-blown furnace is 72%, the smelting temperature is 1200 ℃, and the reduction vulcanization time is continuous feeding; the fuel is natural gas, and the adding amount of the fuel is 45 percent of the mass of the laterite nickel ore balls; the reducing agent is anthracite, and the addition amount of the reducing agent is 12 percent of the mass of the laterite-nickel ore balls; the vulcanizing agent 1 is gypsum, and the adding amount of the vulcanizing agent 1 is 13 percent of the mass of the laterite-nickel ore balls; the flux 1 is limestone, and the addition amount of the flux 1 is 14% of the mass of the laterite nickel ore balls; the main chemical components of the cobalt-poor low-nickel matte 1 are as follows: ni9.54%, co0.10%, fe62%, S28%; the smelting slag comprises the following main chemical components: ni0.58%, co0.16%, fe51.23%;
after water quenching of the obtained poor-cobalt low-nickel matte 1 by a water quenching system, storing the poor-cobalt low-nickel matte in a nickel matte cabin in a low nickel matte particle form, adding the low-nickel matte into a bottom blowing furnace or a converter through a belt conveyer, blowing compressed air, adding a flux 2, and carrying out deferrization, desulfurization, slagging and converting operation for 3 hours at the temperature of 1360 ℃ to produce high-cobalt high-nickel matte, converting slag and flue gas; wherein the blowing amount of the compressed air is 31000Nm 3 H; the flux 2 is quartz stone, the dosage of the flux 2 is 16% of the mass of the low nickel matte particles, and the main chemical components of the high-cobalt high-nickel matte are as follows: ni52.46%, co1.18%, S16.8%; the main chemical components of the blowing slag are as follows: ni3.6%, co0.34% and Fe15%;
(4) Continuously flowing the smelting slag produced in the step (3) into a settling electric furnace through a chute, adding a fusing agent 3, adjusting the temperature to 1220 ℃, and performing dilution and separation to obtain cobalt-poor nickel-poor matte 2, electric furnace slag 1 and flue gas; the obtained poor-cobalt low-nickel matte 2 is intermittently fed into an converting process through a metal discharge port; discharging the obtained electric furnace slag 1 into a slag ladle through a slag hole, transferring the electric furnace slag to a slag ladle field by using a slag ladle vehicle for natural cooling for 35 hours, and then spraying water for cooling for 15 hours until the electric furnace slag 1 is completely cooled; crushing and grinding the completely cooled electric furnace slag 1 to-200 ℃ to prepare raw slag ore, adding a collecting agent, a foaming agent and an activating agent into the raw slag ore to float and separate nickel-cobalt concentrate 1 and tailings 1, magnetically separating the tailings 1 to obtain nickel-cobalt alloy 1 and tailings 2, and sending the obtained nickel-cobalt concentrate 1 and nickel-cobalt alloy 1 to a converting process; wherein the flux 3 is limestone, and the addition amount of the flux 3 is 8 percent of the mass of the smelting slag; the collecting agent is pentyl white drug, and the using amount of the collecting agent is 250g/t; the foaming agent is amyl alcohol, and the using amount of the foaming agent is 60g/t; the activating agent is Na 2 S, the using amount of an activating agent is 31g/t;
(5) Continuously flowing the converting slag produced in the step (3) into a settling electric furnace through a chute, adding a vulcanizing agent 2, a reducing agent and a fusing agent 4, controlling the temperature of the electric furnace to be 1200 ℃, carrying out reduction vulcanization to generate cobalt-rich low-nickel matte, electric furnace slag 2 and flue gas, and sending the obtained cobalt-rich low-nickel matte into a converting process;
discharging the obtained electric furnace slag 2 into a slag ladle through a slag hole, transferring the electric furnace slag to a slag ladle field by using a slag ladle vehicle for natural cooling for 48 hours, and then spraying water for cooling for 13 hours until the electric furnace slag 2 is completely cooled; crushing and grinding the completely cooled electric furnace slag 2 to-200 meshes to prepare raw slag ore, adding a collecting agent, a foaming agent and an activating agent into the raw slag ore to float and separate nickel-cobalt concentrate 2 and tailings 3, magnetically separating the tailings 3 to obtain nickel-cobalt alloy 2 and tailings 4, and sending the obtained nickel-cobalt concentrate 2 and nickel-cobalt alloy 2 to a converting process; wherein the vulcanizing agent 2 is pyrite, and the addition amount of the vulcanizing agent 2 is equal to the mass of the blowing slag5 percent; the flux 4 is limestone, and the addition amount of the flux 4 is 8 percent of the mass of the blowing slag; the reducing agent 2 is anthracite, and the adding amount of the reducing agent 2 is 9% of the weight of the blowing slag; the collecting agent is diesel oil, and the using amount of the collecting agent is 300g/t; the foaming agent is butanol, and the dosage of the foaming agent is 80g/t; the activating agent is Na 2 S, the dosage of the activating agent is 40g/t.
The method comprises the following steps of calculating ingredients, material balance and heat balance: in this example, the recovery rate of nickel was 79.76% and the recovery rate of cobalt was 68.28%.
From the data, the high-cobalt high-nickel matte product obtained by the invention has high quality, and the high-cobalt high-nickel matte product obtained by the comparative example 1 has poor quality; and the nickel recovery rate and the cobalt recovery rate in the method are high and are both more than or equal to 90 percent.
Finally, it should be noted that the above embodiments are intended to illustrate the technical solutions of the present invention and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A method for processing laterite-nickel ore by an oxygen-enriched side-blown converter is characterized by comprising the following steps:
s1: drying the laterite-nickel ore to ensure that the water content of the laterite-nickel ore is 12% -23%;
s2: mixing the dried laterite-nickel ore, a vulcanizing agent 1, a flux 1 and a reducing agent 1, and performing ball pressing and molding to obtain laterite-nickel ore balls;
s3: smelting furnace burden consisting of laterite-nickel ore balls, a vulcanizing agent 1, a reducing agent 1 and a fusing agent 1 to obtain poor-cobalt low-nickel matte 1, smelting slag and flue gas; after water quenching, adding a flux 2 into the poor-cobalt low-nickel matte 1, and performing an air refining process to obtain cobalt-rich high-nickel matte, air refining slag and flue gas;
s4: adding a flux 3 into the smelting slag, and then carrying out dilution separation to obtain cobalt-poor low-nickel matte 2, electric furnace slag 1 and flue gas; the electric furnace slag 1 is crushed, ground and then subjected to flotation to obtain nickel-cobalt concentrate 1 and tailings 1; magnetically separating the tailings 1 to obtain nickel-cobalt alloy 1 and tailings 2; the poor cobalt low nickel matte 2, the nickel-cobalt concentrate 1 and the nickel-cobalt alloy 1 enter an air refining process;
s5: adding a vulcanizing agent 2, a reducing agent 2 and a fusing agent 4 into the converting slag, and then carrying out dilution and separation to obtain cobalt-rich low-nickel sulfur, electric furnace slag 2 and flue gas; the electric furnace slag 2 is crushed, ground and then subjected to flotation to obtain nickel-cobalt concentrate 2 and tailings 3; carrying out magnetic separation on the tailings 3 to obtain nickel-cobalt alloy 2 and tailings 4; and the cobalt-rich low-nickel sulfur, the nickel-cobalt concentrate 2 and the nickel-cobalt alloy 2 enter an air refining process.
2. The method according to claim 1, wherein at least one of the following (a) to (e):
(a) The laterite-nickel ore comprises the following main chemical components: 0.6 to 3 percent of Ni, 0.01 to 1.1 percent of Co, 20 to 41 percent of Fe, 1.3 to 15 percent of MgO, and SiO 2 10％～45％；
(b) The main chemical components of the cobalt-poor low-nickel matte 1 are as follows: 11 to 30 percent of Ni, 0.1 to 1.3 percent of Co, 35 to 63 percent of Fe and 6 to 28 percent of S;
(c) The smelting slag comprises the following main chemical components: 0.15 to 0.6 percent of Ni, 0.006 to 0.01 percent of Co and 30 to 45 percent of Fe;
(d) The main chemical components of the cobalt-rich nickelic matte are as follows: 58 to 81 percent of Ni, 1.1 to 4.3 percent of Co and 8 to 15 percent of S;
(e) The blowing slag comprises the following main chemical components: 1.3 to 2.4 percent of Ni, 0.06 to 0.27 percent of Co and 20 to 65 percent of Fe.
3. The method of claim 1, wherein the sulfidiser 1 is at least one of gypsum, pyrite, sulphur and sulphur-containing minerals; the flux 1 is at least one of limestone and quartz stone; the reducing agent 1 is at least one of anthracite, coke, semi-coke and graphite powder.
4. The method according to the claim 1, characterized in that in step S2, the mass of the vulcanizing agent 1 is 8% -25% of the mass of the lateritic nickel ore, the mass of the flux 1 is 3% -15% of the mass of the lateritic nickel ore, and the mass of the reducing agent 1 is 3% -18% of the mass of the lateritic nickel ore.
5. The method according to the claim 1, characterized in that in step S3, the mass of the vulcanizing agent 1 is 3% -12% of the mass of the lateritic nickel ore balls, the mass of the flux 1 is 1% -10% of the mass of the lateritic nickel ore balls, and the mass of the reducing agent 1 is 1% -9% of the mass of the lateritic nickel ore balls.
6. The method of claim 1, wherein in the step S3, during the smelting, fuel, oxygen and compressed air are introduced, the purity of the oxygen is 90% -98%, the volume concentration of the oxygen in the oxygen-enriched air is 60% -80%, the excess coefficient of the fuel is 75% -90%, the total smelting coefficient is 76% -100%, the smelting temperature is 1230-1600 ℃, and the fuel is at least one of natural gas, pulverized coal and heavy oil.
7. The method according to claim 1, wherein in the blowing step S3, the blast volume is 12000Nm 3 /h～30000Nm 3 And/h, the blowing temperature is 1220-1330 ℃, the blowing time is 1-2 h, the flux 2 is quartz stone, and the dosage of the flux 2 is 2-11% of the mass of the nickel matte particles obtained after water quenching.
8. The method as claimed in claim 1, wherein, in the step S4, the temperature of the enleaning separation is 1250-1450 ℃, the fusing agent 3 is at least one of limestone and quartz stone, and the mass of the fusing agent 3 is 2-6% of the mass of the smelting slag.
9. The method as claimed in claim 1, wherein in step S5, the temperature of the dilution and separation is 1250 ℃ to 1450 ℃, the flux 4 is limestone, and the mass of the flux 3 is 2% to 6% of the mass of the smelting slag; the vulcanizing agent 2 is at least one of gypsum, pyrite, sulfur and sulfur-containing minerals, and the mass of the vulcanizing agent 2 is 6-13% of the mass of the converting slag; the reducing agent 2 is at least one of anthracite, coke, semi-coke and graphite powder, and the mass of the reducing agent 2 is 2-8% of the mass of the converting slag.
10. The method of claim 1, wherein the flotation in steps S4 and S5 requires the addition of a collector, a frother and an activator; the collecting agent is at least one of xanthate and black powder; the foaming agent is at least one of 2# oil, alcohol, methyl isobutyl carbinol and terpineol oil; the activating agent is Na 2 S。
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| CN202210935992.1A CN115386736B (en) | 2022-08-04 | 2022-08-04 | Method for treating laterite-nickel ore by oxygen-enriched side-blown furnace |
| PCT/CN2022/121029 WO2024026998A1 (en) | 2022-08-04 | 2022-09-23 | Method for treating laterite nickel ore by means of oxygen-enriched side blowing furnace |
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| CN202210935992.1A CN115386736B (en) | 2022-08-04 | 2022-08-04 | Method for treating laterite-nickel ore by oxygen-enriched side-blown furnace |
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