CN100487141C - Technique for extracting titanium slag form red mud - Google Patents
Technique for extracting titanium slag form red mud Download PDFInfo
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- CN100487141C CN100487141C CNB2007100157629A CN200710015762A CN100487141C CN 100487141 C CN100487141 C CN 100487141C CN B2007100157629 A CNB2007100157629 A CN B2007100157629A CN 200710015762 A CN200710015762 A CN 200710015762A CN 100487141 C CN100487141 C CN 100487141C
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 239000002893 slag Substances 0.000 title claims description 46
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims description 28
- 239000010936 titanium Substances 0.000 title claims description 28
- 229910052719 titanium Inorganic materials 0.000 title claims description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 40
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 29
- 238000002844 melting Methods 0.000 claims description 18
- 230000008018 melting Effects 0.000 claims description 18
- 239000002253 acid Substances 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 17
- 229910052799 carbon Inorganic materials 0.000 claims description 15
- 229910052742 iron Inorganic materials 0.000 claims description 15
- 230000002829 reductive effect Effects 0.000 claims description 11
- 238000003723 Smelting Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 239000004411 aluminium Substances 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 7
- 238000013467 fragmentation Methods 0.000 claims description 7
- 238000006062 fragmentation reaction Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 6
- 238000010791 quenching Methods 0.000 claims description 6
- 230000000171 quenching effect Effects 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 239000003575 carbonaceous material Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 229910001388 sodium aluminate Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 239000002689 soil Substances 0.000 abstract description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 3
- 238000000137 annealing Methods 0.000 abstract 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract 2
- 239000003963 antioxidant agent Substances 0.000 abstract 1
- 230000003078 antioxidant effect Effects 0.000 abstract 1
- 238000005282 brightening Methods 0.000 abstract 1
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract 1
- 239000001569 carbon dioxide Substances 0.000 abstract 1
- 230000006837 decompression Effects 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 9
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 7
- 238000004131 Bayer process Methods 0.000 description 6
- 239000000284 extract Substances 0.000 description 6
- 239000000706 filtrate Substances 0.000 description 6
- 238000005245 sintering Methods 0.000 description 6
- 229910001570 bauxite Inorganic materials 0.000 description 5
- 239000000571 coke Substances 0.000 description 5
- 239000010439 graphite Substances 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 5
- 238000002386 leaching Methods 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910001648 diaspore Inorganic materials 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- 235000019739 Dicalciumphosphate Nutrition 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 229940115440 aluminum sodium silicate Drugs 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910052663 cancrinite Inorganic materials 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- NEFBYIFKOOEVPA-UHFFFAOYSA-K dicalcium phosphate Chemical group [Ca+2].[Ca+2].[O-]P([O-])([O-])=O NEFBYIFKOOEVPA-UHFFFAOYSA-K 0.000 description 1
- 229940038472 dicalcium phosphate Drugs 0.000 description 1
- 229910000390 dicalcium phosphate Inorganic materials 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 238000003895 groundwater pollution Methods 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- DCKVFVYPWDKYDN-UHFFFAOYSA-L oxygen(2-);titanium(4+);sulfate Chemical compound [O-2].[Ti+4].[O-]S([O-])(=O)=O DCKVFVYPWDKYDN-UHFFFAOYSA-L 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000429 sodium aluminium silicate Substances 0.000 description 1
- 235000012217 sodium aluminium silicate Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 229910000348 titanium sulfate Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- 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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Treatment Of Sludge (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A technical handling method of cuprum wires cross relates to the annealing process of cuprum wires cross and comprises the following steps: putting cuprum wires cross into a annealing furnace, pumping air in the furnace to form negative-pressure in the furnace, filling the furnace with carbon dioxide protective gas; performing a heating treatment of two stages under pressure, performing a gas releasing decompression processing between stages, then cooling-down slowly in the furnace for 0.3-1 hour, and opening the furnace to cool-down naturally to atmospheric temperature. Therefore, electrical soft wires cross through such annealing treatment has brightening surfaces and excellent finish, without greasy dirt or other soils; exhibits uniform flexibility and strong antioxidant ability, and can be stored for a long time.
Description
Technical field
The present invention relates to a kind of technique for extracting titanium slag form red mud, the treating method for alkaline process is produced waste in the aluminum oxide flow process belongs to the light-weight metal metallurfgy technical field.
Background technology
Red mud is to refine the waste that produces in the alumina process with bauxite, because of it is gained the name for crimson look muddy.Along with the continuous development of aluminium industry, at present the whole world is annual produces about 6,000 ten thousand tons of red muds, and be more than 4,500,000 tons red mud quantity discharged every year of China.The most of alumina producers in countries in the world are that red mud is piled up or the impouring deep-sea, depositing of red mud not only takies a large amount of soils and farmland, expends more stockyard construction and maintenance cost, and be present in residue alkali lye in the red mud to underground infiltration, cause groundwater pollution.In addition, the dust that the red mud in stockyard forms flies upward everywhere, and broken ring ecotope causes severe contamination.The current society of be becoming tight in land resources day, environment protection is increasingly important, oneself becomes one of focus that people pay close attention to the comprehensive regulation of red mud.
Red mud is according to the difference of alumina-producing method, can be divided into three kinds of sintering process, Bayer process and integrated process red muds, what Bayer process was produced processing is boehmite type and gibbsitic bauxite, adopt highly basic NaOH stripping high alumina and high-iron bauxite, aluminum oxide and ferric oxide, alkali content height in the red mud of generation.What sintering process and integrated process were handled is the high silicon of indissoluble, low iron, diaspore type, kaolinite type bauxite, the red mud CaO content height of generation, and alkali and iron level are lower.China mainly is sintering process, the integrated process red mud of producing aluminum oxide with diaspore type bauxite, its main component is Dicalcium Phosphate (Feed Grade) and hydrate thereof: abroad then based on Bayer process, the main component of Bayer process red mud is rhombohedral iron ore, sodium aluminium silicate hydrate, cancrinite etc.
Aspect the recovery of the rich amount metal of red mud, India Bharat Chinalco utilizes the Bayer process red mud of our company to reclaim TiO2, its concrete technological process is: a certain amount of red mud is mixed stirring in the tap water of twice, carry out sedimentation by flocculation agent, afterwards with washed red mud and HCl deferred reaction, from neutralizing to mud, adjusting the pH value in the time of 90 ℃-95 ℃ is 4.Use the flocculation agent sedimentation again, dry settled red mud continues to handle with dense HCl under the condition of heating, becomes grey through reaction mud, and washing makes mud and solution separating, and be with SiO this moment in the mud
2And TiO
2Be main, the mud to heat adopts the H2SO4 method to extract titanium oxide again, and Re the vitriol oil makes titanium dioxide be converted into its vitriol like this, and the sulphuric acid soln that afterwards gained is contained titanium sulfate is hydrolyzed, and obtains the metatitanic acid precipitation of white.Use this method can be easy to reclaim TiO
2, and all recirculation of used acid in the removal process, the waste residue that obtains thereafter also can be used for the production of sponge iron.The shortcoming of this method is:
(1) elements such as a large amount of iron, aluminium, sodium, calcium, magnesium, potassium all will be participated in reaction in the mud, all dissolvings, and the acid solution amount is big, the acid concentration height,, acid realizes that the flow process of whole recirculation is longer, complex treatment process is seriously polluted.
(2) ferro element still will be put in the last acid solution and extract, and carries out the production of sponge iron again.
(3) noble metals such as the scandium that is rich in the red mud, zirconium, thorium, gallium also can not get effective enrichment and recovery along with the processing of concentrated acid solution, are very uneconomic.
Summary of the invention
The object of the present invention is to provide a kind of technique for extracting titanium slag form red mud, turn waste into wealth, reduce production costs, the protection environment.
Technique for extracting titanium slag form red mud of the present invention, step is as follows:
(1) in pretreated red mud, adds the reductive agent batching;
(2) batching is joined melting deironing in the smelting furnace;
(3) melting slag is carried out shrend, stripping part silicon, aluminium and sodium element;
(4) Water Quenching Slag is carried out pulverization process;
(5) Water Quenching Slag is joined acid the adjustment in the liquid, the remaining sodium of stripping, calcium, magnesium, aluminium and ferro element are dried the stripping slag and are titanium slag.
Among the present invention:
Full weight of iron content is greater than 10% in the red mud, TiO
2Mass content is dried fragmentation greater than 10% behind the thorough washing, granularity control d50=20-100 μ m.Be preferably full weight of iron content greater than 18%, TiO
2Mass content is greater than 18%, and particle size after cracking d50=20-100 μ m is dried in the washing back.
Reductive agent is a carbon dust, and as graphite, coke etc., add-on is 1.1-1.2 a times of theoretical mixed carbon comtent.70-80% quality carbon dust is a fine carbon powder, and d50=20-200 μ m is preferably 40-140 μ m, and 20-30% quality carbon dust is a carbon granules, and granularity is 1-3mm.
Red mud is with after 70% of fine carbon powder quality is mixed, and is squeezed into block standby, general block or spherical etc.
Smelting furnace is the three electrode electric furnace arrangement for producing steel that the bottom is opened the mouth of slagging tap again, also can be the hot stove transformation in three electrode ore deposit and forms, and adopts the mode melting of submerged arc melting.
The condition of control is: first furnace bottom adds 10-15% fine carbon powder amount, adds the compound that red mud is joined carbon material and particle carbon granules then, opens electric arc furnace, utmost point heart circle power density: the 1200-1800A/m of control
2, the ratio of secondary current and secondary voltage should keep the smelting state to melt to the red mud material and finish greater than 260, and then adds remaining fine carbon powder and carry out degree of depth melting slag making.
Shrend solution is the resulting carbon mother liquid of carbonating decomposition sodium aluminate liquid in the aluminum oxide flow process, can carry out shrend at slag notch, and shrend liquid filters, and filtrate is returned the alumina producer utilization.
Water Quenching Slag is dried the back and is pulverized, and pulverizes levigately, controls d50=10-300 μ m, is preferably 100-150 μ m.
The acid liquid of adjusting is controlled acid solution H by the hydrochloric acid of distilled water, concentration 30% with return the composite solution that leach liquor is formed
+Concentration is 0.2-8mol/L, and preferred 0.5-4mol/l leaches liquid-solid ratio: 4-15: 1, and temperature: 30-95 ℃.
The present invention has following characteristics:
(1) raw materials for production are waste in the alumina producing flow process, utilize according to this method, have extended industrial chain, have reduced the alumina producing link, cut down the consumption of energy, and have reduced alumina production cost.
(2) adopt the way of reduction titanium slag to handle red mud, realized the comprehensive utilization of ferro element in the red mud, and realized effective separation.
(3) technical parameter is controlled easily, and the ferro element effective rate of utilization can reach more than 94%, and titanium oxide content can reach 82% in the titanium slag.
(4) way of employing enrichment titanium slag, the titaniferous materials that obtains can extract the art breading of titanium oxide, Scium trioxide, by the way of flow process serial connection, has just realized the comprehensive utilization of the rich amount metal of red mud like this.Protect environment, reduced alumina production cost, promoted the alumina producing ability.
(5) production cost is low, and the resultant market capacity is big, has established and has applied the basis.
(6) this flow process has realized the serialization operation, is convenient to carry out large industrialized production.
(7) application of the inventive method reduces because of red mud and deposits pollution to environment, solves the problem of environment protection greatly.
(8) make sintering system realize energy-conservation significantly and consumption reduction, help bringing into play to greatest extent the throughput of sintering process and Bayer process two big systems, the optimization production flow process.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1
The method of extracting titanium slag form red mud of the present invention, step is as follows:
(1) selecting the composition of red mud is full weight of iron content 20%, TiO
2Mass content 25%.Oven dry fragmentation behind the thorough washing, granularity (d50) is: 40 μ m.Reductive agent is a graphite, and add-on is 1.1 times of theoretical mixed carbon comtent.Granularity (d50) control of control 70% is preferably: 80 μ m, 30% granularity is the granular graphite of 1-3mm.Red mud is squeezed into block standby with after 70% of Graphite Powder 99 amount is mixed.
(2) join out then in the three electrode electric furnace arrangement for producing steel of the mouth of slagging tap and carry out the melting deironing, elder generation's furnace bottom adds 15% Graphite Powder 99, add red mud then and join the compound of carbon material and particle carbon granules, adopt the mode of submerged arc melting, utmost point heart circle power density: the 1200-1800A/m of control
2Fluctuation, the ratio of secondary current and secondary voltage is greater than 260.Keep the smelting state to finish, and then the Graphite Powder 99 of adding residue 15% carry out degree of depth melting slag making to the fusing of red mud material.
(3) after melting finishes, cinder notch is slagged tap, the iron mouth taps a blast furnace, adopt the resulting carbon mother liquid of carbonating decomposition sodium aluminate liquid in the alumina by sintering flow process, carry out shrend to going out slag charge, shrend liquid filters, filtrate is returned alumina producer, obtains the solution that part contains silicon, aluminium and sodium and recycles.
(4) above-mentioned shrend filter residue is dried fragmentation, levigate, control size (d50) is controlled to be 120 μ m
(5) join acid the adjustment in the liquid, by distilled water, hydrochloric acid (30%) and return the composite solution that leach liquor is formed, acid to adjust liquid H+ concentration be 1.5mol/l, the leaching liquid-solid ratio: 8, and temperature: 75 ℃.
(6) leaching finishes to the leach liquor filtration, and filtrate returns 40%, and filter residue washs, and oven dry is the titanium slag that extracts in the red mud, titanium oxide content 68%.
Embodiment 2
The method of extracting titanium slag form red mud of the present invention, step is as follows:
(1) selecting the composition of red mud is full weight of iron content 10%, TiO
2Mass content 10%.Oven dry fragmentation behind the thorough washing, granularity (d50) is: 90 μ m.Reductive agent is a graphite, and add-on is 1.2 times of theoretical mixed carbon comtent.Granularity (d50) control of control 80% is preferably: 120 μ m, 20% granularity is the granular graphite of 1-3mm.Red mud is with after 70% of Graphite Powder 99 amount is mixed, and glomeration is standby.
(2) with embodiment 1, different is that first furnace bottom adds 10% Graphite Powder 99, keep the smelting state to finish to the fusing of red mud material, and then the Graphite Powder 99 of adding residue 20% carries out degree of depth melting slag making.
(3) with embodiment 1.
(4) with embodiment 1, different is that control size (d50) is controlled to be 100 μ m.
(5) with embodiment 1, different is that acid adjustment liquid H+ concentration is 4mol/l, leaches liquid-solid ratio: 10, and temperature: 95 ℃.
(6) leaching finishes to the leach liquor filtration, and filtrate returns 60%, and filter residue washs, and oven dry is the titanium slag that extracts in the red mud, titanium oxide content 46%.
Embodiment 3
The method of extracting titanium slag form red mud of the present invention, step is as follows:
(1) selecting the composition of red mud is full weight of iron content 28%, TiO
2Mass content 29%.Oven dry fragmentation behind the thorough washing, granularity (d50) is: 70 μ m.Reductive agent is a coke, and add-on is 1.1 times of theoretical mixed carbon comtent.Granularity (d50) control of control 70% is preferably: 140 μ m, 30% granularity is the granular coke of 1-3mm.Red mud is with after 70% of coke powder amount is mixed, and glomeration is standby.
(2) with embodiment 1, different is that first furnace bottom adds 13% coke powder, keep the smelting state to finish to the fusing of red mud material, and then the coke powder of adding residue 17% carries out degree of depth melting slag making.
(3) with embodiment 1.
(4) with embodiment 1, different is that control size (d50) is controlled to be 130 μ m.
(5) with embodiment 1, that different is the acid liquid H that adjusts
+Concentration is 0.5mol/l, leaches liquid-solid ratio: 4, and temperature: 55 ℃.
(6) leaching finishes to the leach liquor filtration, and filtrate returns 30%, and filter residue washs, and oven dry is the titanium slag that extracts in the red mud, titanium oxide content 79%.
Embodiment 4
The method of extracting titanium slag form red mud of the present invention, step is as follows:
(1) selecting the composition of red mud is full weight of iron content 35%, TiO
2Mass content 32%.Oven dry fragmentation behind the thorough washing, granularity (d50) is: 70 μ m.Reductive agent is a coke, and add-on is 1.2 times of theoretical mixed carbon comtent.Granularity (d50) control of control 70% is preferably: 140 μ m, 30% granularity is the granular coke of 1-3mm.Red mud is with after 70% of coke powder amount is mixed, and glomeration is standby.
(2) with embodiment 1, different is that first furnace bottom adds 11% coke powder, keep the smelting state to finish to the fusing of red mud material, and then the coke powder of adding residue 19% carries out degree of depth melting slag making.
(3) with embodiment 1.
(4) with embodiment 1, different is that control size (d50) is controlled to be 100 μ m.
(5) with embodiment 1, that different is the acid liquid H that adjusts
+Concentration is 3mol/l, leaches liquid-solid ratio: 4, and temperature: 55 ℃.
(6) leaching finishes to the leach liquor filtration, and filtrate returns 30%, and filter residue washs, and oven dry is the titanium slag that extracts in the red mud, titanium oxide content 76%.
Claims (10)
1, a kind of technique for extracting titanium slag form red mud is characterized in that step is as follows:
(1) in pretreated red mud, adds the reductive agent batching;
(2) batching is joined melting deironing in the smelting furnace;
(3) melting slag is carried out shrend, stripping part silicon, aluminium and sodium element;
(4) Water Quenching Slag is carried out pulverization process;
(5) Water Quenching Slag is joined acid the adjustment in the liquid, the remaining sodium of stripping, calcium, magnesium, aluminium and ferro element are dried the stripping slag and are titanium slag.
2, technique for extracting titanium slag form red mud according to claim 1 is characterized in that in the red mud full weight of iron content greater than 10%, TiO
2Mass content is dried fragmentation greater than 10% behind the thorough washing, granularity control d50=20-100 μ m.
3, technique for extracting titanium slag form red mud according to claim 1 is characterized in that reductive agent is a carbon dust, and add-on is 1.1-1.2 a times of theoretical mixed carbon comtent.
4, technique for extracting titanium slag form red mud according to claim 3 is characterized in that 70-80% quality carbon dust is a fine carbon powder, d50=20-200 μ m, and 20-30% quality carbon dust is a carbon granules, granularity is 1-3mm.
5, technique for extracting titanium slag form red mud according to claim 4 after it is characterized in that red mud and 70% of fine carbon powder quality being mixed, is squeezed into block standby.
6,, it is characterized in that smelting furnace is the three electrode electric furnace arrangement for producing steel that the bottom is opened the mouth of slagging tap again, adopts the mode melting of submerged arc melting according to the described technique for extracting titanium slag form red mud of the arbitrary claim of claim 5.
7, technique for extracting titanium slag form red mud according to claim 6, it is characterized in that melting condition is: add quality 10-15% fine carbon powder amount at furnace bottom earlier, add red mud then and join the compound of carbon material and particle carbon granules, open electric arc furnace, utmost point heart circle power density: the 1200-1800A/m of control
2, the ratio of secondary current and secondary voltage should keep the smelting state to melt to the red mud material and finish greater than 260, and then adds remaining fine carbon powder and carry out degree of depth melting slag making.
8, technique for extracting titanium slag form red mud according to claim 7 is characterized in that shrend solution is the resulting carbon mother liquid of carbonating decomposition sodium aluminate liquid in the aluminum oxide flow process.
9, technique for extracting titanium slag form red mud according to claim 8 is characterized in that Water Quenching Slag dries the back and pulverize, and pulverizes levigately, controls d50=10-300 μ m.
10, technique for extracting titanium slag form red mud according to claim 9, it is characterized in that the acid liquid of adjusting is by the hydrochloric acid of distilled water, concentration 30% with return the composite solution that leach liquor is formed, control acid solution H+ concentration is 0.2-8mol/L, leaches liquid-solid ratio: 4-15: 1, and temperature: 30-95 ℃.
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| CN105219968B (en) * | 2015-10-20 | 2017-03-15 | 郑州大学 | A kind of method of titanium and iron in acidleach precipitate flotation combined recovery red mud |
| CN106224979B (en) * | 2016-07-29 | 2018-07-10 | 南京天地环境污染防治研究院 | A kind of method of dangerous waste incineration bottom ash recycling |
| CN107083485B (en) * | 2017-04-28 | 2018-09-07 | 东北大学 | A kind of method of comprehensive utilization of alumina laterite |
| CN112553480A (en) * | 2020-10-10 | 2021-03-26 | 吕梁学院 | Method for recovering zirconium from red mud |
| CN113683342B (en) * | 2021-07-16 | 2023-01-24 | 清远金谷智联环保产业研究院有限公司 | Method for preparing high-strength artificial board by using nickel smelting furnace slag and biomass waste |
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| Title |
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| 从赤泥中综合回收有价金属工艺的研究进展. 廖春发，卢惠明，邱定蕃，许秀莲.轻金属，第10期. 2003 |
| 从赤泥中综合回收有价金属工艺的研究进展. 廖春发，卢惠明，邱定蕃，许秀莲.轻金属，第10期. 2003 * |
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