CN204281821U - The system of separating valuable metals from copper ashes - Google Patents
The system of separating valuable metals from copper ashes Download PDFInfo
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- CN204281821U CN204281821U CN201420712519.8U CN201420712519U CN204281821U CN 204281821 U CN204281821 U CN 204281821U CN 201420712519 U CN201420712519 U CN 201420712519U CN 204281821 U CN204281821 U CN 204281821U
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- pelletizing
- copper ashes
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- reduction
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- 239000010949 copper Substances 0.000 title claims abstract description 155
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 153
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 153
- 239000002956 ash Substances 0.000 title claims abstract description 142
- 235000002918 Fraxinus excelsior Nutrition 0.000 title claims abstract description 140
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 42
- 239000002184 metal Substances 0.000 title claims abstract description 38
- 150000002739 metals Chemical class 0.000 title claims abstract description 19
- 238000005453 pelletization Methods 0.000 claims abstract description 158
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 118
- 230000009467 reduction Effects 0.000 claims abstract description 63
- 230000001590 oxidative effect Effects 0.000 claims abstract description 47
- 239000000203 mixture Substances 0.000 claims abstract description 38
- 230000002829 reductive effect Effects 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 31
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- 238000001035 drying Methods 0.000 claims abstract description 23
- 239000011230 binding agent Substances 0.000 claims abstract description 20
- 230000003647 oxidation Effects 0.000 claims abstract description 14
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 14
- 239000000654 additive Substances 0.000 claims abstract description 11
- 230000000996 additive effect Effects 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 abstract description 48
- 239000011701 zinc Substances 0.000 abstract description 25
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 23
- 229910052725 zinc Inorganic materials 0.000 abstract description 23
- 238000000034 method Methods 0.000 description 76
- 230000008569 process Effects 0.000 description 63
- 238000006722 reduction reaction Methods 0.000 description 55
- 238000011084 recovery Methods 0.000 description 25
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 24
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 16
- 229910052840 fayalite Inorganic materials 0.000 description 15
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 description 15
- 239000011133 lead Substances 0.000 description 12
- 239000002245 particle Substances 0.000 description 12
- 239000011787 zinc oxide Substances 0.000 description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 11
- YEXPOXQUZXUXJW-UHFFFAOYSA-N lead(II) oxide Inorganic materials [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 11
- 229910052760 oxygen Inorganic materials 0.000 description 11
- 239000001301 oxygen Substances 0.000 description 11
- 239000000843 powder Substances 0.000 description 11
- 239000002893 slag Substances 0.000 description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 9
- 238000003723 Smelting Methods 0.000 description 9
- 239000000292 calcium oxide Substances 0.000 description 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 9
- 239000003546 flue gas Substances 0.000 description 9
- 238000007885 magnetic separation Methods 0.000 description 9
- 238000001354 calcination Methods 0.000 description 8
- 239000003245 coal Substances 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 8
- 235000009508 confectionery Nutrition 0.000 description 8
- 239000000446 fuel Substances 0.000 description 8
- 239000003345 natural gas Substances 0.000 description 8
- 229920002472 Starch Polymers 0.000 description 7
- 239000008107 starch Substances 0.000 description 7
- 235000019698 starch Nutrition 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 229910000464 lead oxide Inorganic materials 0.000 description 4
- 230000005291 magnetic effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000001465 metallisation Methods 0.000 description 4
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 4
- -1 wilkinite compound Chemical class 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 239000000571 coke Substances 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 235000013379 molasses Nutrition 0.000 description 2
- 239000011295 pitch Substances 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 238000009853 pyrometallurgy Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The utility model discloses a kind of system of separating valuable metals from copper ashes, comprising: the first mixed pelletizing device, there is the outlet of copper ashes entrance, the first binding agent entrance and copper ashes pelletizing; Drying installation, has copper ashes pelletizing entrance and the outlet of dry copper ashes pelletizing; Oxidizing roasting device, has the pelletizing outlet after dry copper ashes pelletizing entrance and oxidation; Second mixed pelletizing device, has the pelletizing entrance after oxidation, reductive agent entrance, additive entrance, the second binding agent entrance and pelletizing material outlet; Reduction roasting device, puts the pelletizing outlet after having pelletizing material inlet, reduction and exhanst gas outlet; Shredder assembly, has the pelletizing entrance after reduction and mixture outlet; And concentration equipment, there is mixture inlet, metal iron powder outlet and tailings outlet.This system can effectively separating ferrum, zinc and lead from copper ashes, and the metallic iron grade obtained is higher.
Description
Technical field
The utility model belongs to metallurgical technology field, and specifically, the utility model relates to a kind of system of separating valuable metals from copper ashes.
Background technology
In recent years, world's copper output increases rapidly, and the copper output of China leaps to the first in the world.In China, more than 97% of copper output is produced by pyrometallurgical smelting, pyrometallurgical smelting dominate.The high ferro copper ashes that copper pyrometallurgy process output is a large amount of, stores up these copper ashes and takies a large amount of soils, also produce certain impact to the environment of surrounding simultaneously.Copper ashes iron content, between 30 ~ 40%, higher than the grade of current domestic industry ore dressing iron ore, because copper mine source is different, also contains the valuable metal elements such as cobalt, nickel, zinc in copper ashes.Be rich in iron, the copper ashes of copper stores up in a large number, not only cause the significant wastage of resource, and land occupation, contaminate environment, hinder the Sustainable development of cupper smelting.
In copper ashes, the dominant of iron is fayalite (Fe mutually
2siO
4), be difficult to reduction.Known by analysis-reduction thermodynamics, the reduction temperature of copper ashes is higher than common iron ore reduction temperature, higher to the requirement of reducing atmosphere.In addition, the low copper ashes fusing point that causes of the fusing point of fayalite is about 1200 DEG C.When carbonaceous pelletizing is when being greater than 1200 DEG C of reduction, copper ashes fusing makes reductive agent and slag layering, is degrading reacting dynamics condition; When temperature of reaction is higher, as more than 1450 DEG C, then belong to melting and reducing, although can reduce, energy consumption is too high; If reduction temperature is lower than copper ashes fusing point, although pelletizing is non-fusible, copper ashes fully contacts with reductive agent, and fayalite is difficult reduction again, and reduction rate is slow, reduces not thorough.
The utilization of copper smelting slag receives the concern of Chinese scholars, adopts Physical ore dressing, pyrometallurgy and hydrometallurgy at present, but all can not carry out high efficiente callback to iron to the recovery majority of iron, copper in copper ashes.
Application number 200910094839.5 patent discloses a kind of method extracting iron in Copper making waste residue, the method is passed through after copper ashes, reductive agent, calcium oxide or calcium carbonate mix, ore phase reconstruction and carbothermic reduction reaction is carried out, through magnetic separation Separation and Recovery iron under high temperature.The reductive agent quality requirements of the method required in process copper ashes process is high, need composition to count with wt% to be greater than the hard coal of 75 containing C and/or to be greater than graphite and/or the refinery coke being greater than 85 containing C and/or the coke being greater than 85 containing C of 80 containing C, and required additive calcium oxide and calcium carbonate quality requirements high, need composition to count calcium oxide with wt% and be greater than 98 containing CaO, calcium carbonate is containing CaCO
3be greater than 98, calcination time reaches 2.0 ~ 20h simultaneously, consumes a large amount of energy, causes energy consumption higher.
Number of patent application is the iron smelting method that patent discloses a kind of direct-reduction-mill choosing process copper ashes and nickel slag of 200910088663.2, the method is by pelletizing after a certain amount of coal, copper ashes or nickel slag and flux mixing, after drying, pelletizing is distributed into rotary hearth furnace and is heated to 1100 ~ 1350 DEG C, keep 15 ~ 40 minutes, then carry out fine grinding after the high temperature reduction iron charge of 600 ~ 1100 DEG C directly being sent in water cooling to sort, waste gas after iron charge high temperature oxygen loss after fine grinding sorts carries out drying rear agglomeration, forms block iron charge.The method is discharged after green pellets is kept 15 ~ 40 minutes at 1100 ~ 1350 DEG C in rotary hearth furnace, within the scope of this temperature and time, in copper ashes, fayalite reduces under the effect of carbonaceous reducing agent, if temperature is low, ferro element reduction is not thorough, if temperature height, copper ashes fusing bonding, finally cause metallic iron can not efficient recovery in mill ore magnetic selection process, the zinc in copper ashes could not carry out extracting and reclaiming by the method simultaneously.
Number of patent application is the method that patent discloses a kind of fayalite slag production magnetite of 201210198186.7.Fayalite in fayalite slag is converted into the magnetite that can be used in smelting iron by the method, and concrete steps are that fayalite slag is worn into powder, and at 600 ~ 1000 DEG C, roasting 0.5 ~ 1.5 hour, passes into industrial oxygen in roasting process, obtain calcining.The method only by fayalite at low temperatures roasting obtain calcining, the calcining of gained provides iron-smelting raw material for iron and steel enterprise, really do not indicate purposes, and ferromagnetic content is only 36% in calcining, can not effective enriched iron element by the method for ore dressing, the fact can not utilize for steel industry, powder is carried out roasting in roasting kiln simultaneously, and have certain stacking factor, this type of powder roasting kiln production efficiency is low, and level of automation is not high, in addition, need to pass into industrial oxygen in roasting process, need to increase corresponding oxygen, oxygen supply equipment.
Under the situation that ferrolite supply anxiety, price constantly rise both at home and abroad at present, develop this part copper ashes, extract the valuable metal such as iron, zinc wherein, reduce the carrying capacity of environment of cupper smelting, to realize copper ashes comprehensive utilization, widen iron ore deposit, promote that Copper making industry sustainable health development is significant.
Utility model content
The utility model is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, an object of the present utility model is the system proposing a kind of separating valuable metals from copper ashes, and this system can effectively separating ferrum, zinc and lead from copper ashes, and the metallic iron grade obtained is higher.
In one of the present utility model, the utility model proposes a kind of system of separating valuable metals from copper ashes, comprising:
First mixed pelletizing device, described first mixed pelletizing device has the outlet of copper ashes entrance, the first binding agent entrance and copper ashes pelletizing;
Drying installation, described drying installation has copper ashes pelletizing entrance and the outlet of dry copper ashes pelletizing, and described copper ashes pelletizing entrance exports with described copper ashes pelletizing and is connected;
Oxidizing roasting device, described oxidizing roasting device has the pelletizing outlet after dry copper ashes pelletizing entrance and oxidation, and described dry copper ashes pelletizing entrance exports with described dry copper ashes pelletizing and is connected;
Second mixed pelletizing device, described second mixed pelletizing device has pelletizing entrance, reductive agent entrance, additive entrance, the second binding agent entrance and pelletizing material outlet after oxidation, and the pelletizing entrance after described oxidation exports with the pelletizing after described oxidation and is connected;
Reduction roasting device, described reduction roasting device has the pelletizing outlet after pelletizing material inlet, reduction and exhanst gas outlet, and described pelletizing material inlet is connected with described pelletizing material outlet;
Shredder assembly, described shredder assembly has the pelletizing entrance after reduction and mixture outlet, and the pelletizing entrance after described reduction exports with the pelletizing after described reduction and is connected; And
Concentration equipment, described concentration equipment has mixture inlet, metal iron powder outlet and tailings outlet, and described mixture inlet is connected with described mixture outlet.
According to the system of separating valuable metals from copper ashes of the utility model embodiment by before copper ashes is carried out reducing roasting process, in advance copper ashes is carried out oxidizing roasting process, the fayalite of difficult reduction in copper ashes is made to be converted into the ferric oxide of comparatively easily reduction, and then significantly can reduce the time of sequential reduction calcination process and the consumption of reductive agent, thus reduction processing cost, simultaneously by oxidizing roasting process, the continuous enrichment of ferro element in copper ashes can be made, and make ferro element more easily be reduced to metallic iron, thus significantly improve subsequent processes pelletizing degree of metalization and the metallic iron rate of recovery, in addition, this system can realize zinc and plumbous recycling, and zinc and the plumbous rate of recovery all can reach more than 90%.
In addition, following additional technical characteristic can also be had according to the system of separating valuable metals from copper ashes of the utility model above-described embodiment:
In embodiments more of the present utility model, described oxidizing roasting device is the rotary hearth furnace with oxidizing atmosphere.Thus, oxidizing roasting processing efficiency can be improved further.
In embodiments more of the present utility model, described reduction roasting device is the rotary hearth furnace with reducing atmosphere.Thus, reducing roasting processing efficiency can be improved further.
Accompanying drawing explanation
Fig. 1 is the system architecture schematic diagram of separating valuable metals from copper ashes according to the utility model embodiment.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it is to be appreciated that term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In description of the present utility model, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In one of the present utility model, the utility model proposes a kind of system of separating valuable metals from copper ashes.According to embodiment of the present utility model, valuable metal can comprise at least one in iron, zinc and lead.Below with reference to Fig. 1, the system of separating valuable metals from copper ashes of the utility model embodiment is described in detail.According to embodiment of the present utility model, this system comprises:
First mixed pelletizing device 100: according to embodiment of the present utility model, first mixed pelletizing device 100 has copper ashes entrance 101, first binding agent entrance 102 and copper ashes pelletizing outlet 103, and be suitable for copper ashes and binding agent to carry out the first mixed pelletizing, thus copper ashes pelletizing can be obtained.According to embodiment of the present utility model, copper ashes can for the slag produced in pyrometallurgical smelting process, and according to specific embodiment of the utility model, copper ashes can contain Zn and 0.46wt%Pb of Cu, 1.53wt% of Fe, 0.36wt% of 39.12wt%.According to embodiment of the present utility model, the particular type of binding agent is also not particularly limited, according to specific embodiment of the utility model, binding agent is be selected from least one in starch solution, wilkinite, molasses, water glass, pitch and lime, such as, can be the starch solution of 10% for copper ashes weight.According to embodiment of the present utility model, the particle diameter of copper ashes pelletizing is also not particularly limited, and according to specific embodiment of the utility model, the particle diameter of copper ashes pelletizing can be 3 ~ 6 millimeters.Contriver finds, pellet size is too small is not easy to pelletizing, and pellet size is excessive makes little with the point of contact of reductive agent and cause reducing at sequential reduction treating processes pelletizing degree of metalization.
Drying process device 200: according to embodiment of the present utility model, drying installation 200 has copper ashes pelletizing entrance 201 and dry copper ashes pelletizing outlet 202, according to specific embodiment of the utility model, copper ashes pelletizing entrance 201 and copper ashes pelletizing export 103 and are connected, and be suitable for copper ashes pelletizing obtained above to carry out drying treatment, thus the copper ashes pelletizing through drying treatment can be obtained.According to embodiment of the present utility model, the condition of drying treatment is also not particularly limited, and according to specific embodiment of the utility model, drying treatment can carry out 30 ~ 90 minutes under 105 ~ 280 degrees Celsius.Contriver finds, can significantly improve the drying efficiency of copper ashes pelletizing under this condition.
Oxidizing roasting device 300: according to embodiment of the present utility model, oxidizing roasting device 300 has the pelletizing outlet 302 after dry copper ashes pelletizing entrance 301 and oxidation, according to specific embodiment of the utility model, dry copper ashes pelletizing entrance 301 exports 202 with dry copper ashes pelletizing and is connected, and be suitable for the copper ashes pelletizing through drying treatment obtained above to carry out oxidizing roasting process, thus the fayalite in copper ashes can be converted into ferric oxide.According to embodiment of the present utility model, the condition of oxidizing roasting process is also not particularly limited, and according to specific embodiment of the utility model, oxidizing roasting process can carry out 20 ~ 50 minutes under 700 ~ 900 degrees Celsius.Contriver finds, can significantly improve oxidizing roasting efficiency under this condition.
According to embodiment of the present utility model, oxidizing roasting device can for having the rotary hearth furnace of oxidizing atmosphere.Concrete, by the ratio of control combustion device air and oxygen, ensureing that in stove be oxidizing atmosphere, wherein, can ensure to be oxidizing atmosphere in stove, coefficient of excess air value 1.2 ~ 2.0 in oxidizing roasting process by controlling air flow quantity.Contriver finds, by before copper ashes is carried out reducing roasting process, in advance copper ashes pelletizing is carried out oxidizing roasting process, the fayalite of difficult reduction in copper ashes is made to be converted into the ferric oxide of comparatively easily reduction, and then significantly can reduce the time of sequential reduction calcination process and the consumption of reductive agent, thus reduction processing cost, simultaneously by oxidizing roasting process, the continuous enrichment of ferro element in copper ashes can be made, and make ferro element more easily be reduced to metallic iron, thus significantly improve subsequent processes pelletizing degree of metalization and the metallic iron rate of recovery, in addition, ensure to be oxidizing atmosphere in stove by control combustion device air flow quantity, the energy consumption needed for oxygen can be saved, thus significantly reduce separation costs.
Second mixed pelletizing device 400: according to embodiment of the present utility model, second mixed pelletizing device 400 has the pelletizing entrance 401 after oxidation, reductive agent entrance 402, additive entrance 403, second binding agent entrance 404 and pelletizing material outlet 405, according to specific embodiment of the utility model, pelletizing entrance 401 after oxidation exports 302 with the pelletizing after oxidation and is connected, and be suitable for the copper ashes pelletizing through oxidizing roasting process obtained above and the compound containing reductive agent, additive and binding agent to carry out the second mixed pelletizing, thus pelletizing material can be obtained.According to embodiment of the present utility model, the particular type of reductive agent is also not particularly limited, according to specific embodiment of the utility model, reductive agent can be the coal of fixed carbon content higher than 60wt%, such as, can be at least one in blue charcoal, brown coal, smokeless Coal and coke.According to embodiment of the present utility model, the particular type of additive and binding agent is also not particularly limited, according to specific embodiment of the utility model, additive can for being selected from least one in Wingdale, lime, slaked lime and sodium carbonate, can be such as the Wingdale of calcium oxide 90wt%, binding agent can for being selected from least one in starch solution, wilkinite, molasses, water glass, pitch and lime.According to embodiment of the present utility model, each component proportions in compound is also not particularly limited, and according to specific embodiment of the utility model, in compound, reductive agent, additive and binding agent mass ratio can be 100:20 ~ 50:10 ~ 30.According to embodiment of the present utility model, the particle diameter of pelletizing material is also not particularly limited, and according to specific embodiment of the utility model, the particle diameter of pelletizing material can be 6 ~ 12 millimeters.Concrete, the granularity of pelletizing material can adjust according to the granularity of pelletizing after oxidizing roasting and pelletizing all iron content, and will ensure enough reductive agents and additive reduces to copper ashes.In this step, as mother bulb after the cooling of the copper ashes pelletizing through oxidizing roasting process obtained above, the compound of parcel containing reductive agent, additive and binding agent outside it, thus obtain pelletizing material, and pelletizing material is carried out drying treatment.Contriver finds, sequential reduction process is carried out by reductive agent and additive-package being rolled in outside copper ashes, the point of contact of copper ashes and reductive agent in sequential reduction process can be significantly improved, and then significantly can reduce reduction temperature and the recovery time of copper ashes, thus reduce production energy consumption and cost.
Reduction roasting device 500: according to embodiment of the present utility model, reduction roasting device 500 has the pelletizing outlet 502 after pelletizing material inlet 501, reduction and exhanst gas outlet 503, according to specific embodiment of the utility model, pelletizing material inlet 501 is connected with pelletizing material outlet 405, and be suitable for pelletizing material obtained above to carry out reducing roasting process, thus the pelletizing after reducing and the flue gas containing zinc oxide and plumbous oxide can be obtained.According to embodiment of the present utility model, the condition of reducing roasting process is also not particularly limited, and according to specific embodiment of the utility model, reducing roasting process can carry out 15 ~ 40 minutes under 1100 ~ 1300 degrees Celsius.Contriver finds, can significantly improve reducing roasting efficiency under this condition.
According to embodiment of the present utility model, reduction roasting device can for having the rotary hearth furnace of reducing atmosphere.According to specific embodiment of the utility model, can ensure to be reducing atmosphere in stove, coefficient of excess air value 0.8 ~ 1.1 in reducing roasting process by controlling air flow quantity.Concrete, in reducing roasting treating processes, in copper ashes, zinc and the plumbous metallic element that waits are easy to be reduced and gasify under the reducing environment of high temperature, and enter flue gas and remove from reduction apparatus, then, zinc, lead steam are again oxidized and form zinc oxide and plumbous oxide in flue gas, thus by just obtaining to the collection of flue gas the secondary dust being rich in zinc oxide and plumbous oxide.
Shredder assembly 600: according to embodiment of the present utility model, shredder assembly 600 has the pelletizing entrance 601 after reduction and mixture outlet 602, according to specific embodiment of the utility model, pelletizing entrance 601 after reduction exports 502 with the pelletizing after reduction and is connected, and be suitable for the pelletizing after by reduction obtained above and carry out break process, thus the mixture containing metal iron powder and tailings can be obtained.According to embodiment of the present utility model, pelletizing after reduction is carried out the mode of break process and is not particularly limited, according to specific embodiment of the utility model, hammer mill can be adopted to carry out break process to the pelletizing after reduction, thus the mixture containing metal iron powder and tailings can be obtained.
Concentration equipment 700: according to embodiment of the present utility model, concentration equipment 700 has mixture inlet 701, metal iron powder outlet 702 and tailings outlet 703, according to specific embodiment of the utility model, mixture inlet 701 is connected with mixture outlet 602, and be suitable for the mixture containing metallic iron and tailings obtained above to carry out magnetic separation process, thus metal iron powder and tailings can be obtained respectively.According to embodiment of the present utility model, the condition of magnetic separation process is also not particularly limited, and according to specific embodiment of the utility model, magnetic separation process can be carried out under magneticstrength is 800 ~ 1200 oersteds.Contriver finds, slag iron mixture now, and slag iron is very well separated, does not need too strong magneticstrength just scum can be separated, and the too high meeting of magneticstrength causes choosing some and is with magnetic slag, thus reduction Iron grade.In this step, concrete, by magnetic separation process, can be separated containing metal iron powder with non magnetic ore with magnetic mineral in the mixture of tailings, thus realize being separated of metal iron powder and tailings.
According to the system of separating valuable metals from copper ashes of the utility model embodiment by before copper ashes is carried out reducing roasting process, in advance copper ashes is carried out oxidizing roasting process, the fayalite of difficult reduction in copper ashes is made to be converted into the ferric oxide of comparatively easily reduction, and then significantly can reduce the time of sequential reduction calcination process and the consumption of reductive agent, thus reduction processing cost, simultaneously by oxidizing roasting process, the continuous enrichment of ferro element in copper ashes can be made, and make ferro element more easily be reduced to metallic iron, thus significantly improve subsequent processes pelletizing degree of metalization and the metallic iron rate of recovery, in addition, this system can realize zinc and plumbous recycling, and zinc and the plumbous rate of recovery all can reach more than 90%.
As mentioned above, can have according to the system of separating valuable metals from copper ashes of the utility model embodiment and be selected from following advantage one of at least:
The problems such as land occupation that a large amount of copper ashes solid waste produced causes and contaminate environment can be solved in Copper making process according to the system of separating valuable metals from copper ashes of the utility model embodiment, well by the multiple metallic element synthetical recovery in copper ashes, widen the source of the Mineral resources such as iron, copper, zinc, lead, decrease the consumption to original Mineral resources, improve resource utilization, achieve cleaner production and the Sustainable development of Copper making;
Can solve conventional art and existing technique according to the system of separating valuable metals from copper ashes of the utility model embodiment is difficult to the fayalite difficulty reduction in copper ashes, fayalite reduction needs high temperature, and the contradiction melted under causing copper ashes high temperature containing low melting point in copper ashes, the problem that iron is difficult to enrichment can be solved simultaneously, can be the iron that grade reaches 94% by Fe3+ reduction, and iron recovery can reach 92%;
The system of separating valuable metals from copper ashes according to the utility model embodiment can solve the comprehensive reutilization problem of valuable element in copper ashes, make the metallic elements such as the zinc in copper ashes, lead can be able to enrichment and effectively be separated, zinc recovery reaches 97.7%, lead recovery reaches 97.2%, simultaneously, flue gas ash removal ash collects gained ZnO grade can reach more than 65%, and has very high marketable value.
Below with reference to specific embodiment, be described the utility model, it should be noted that, these embodiments are only descriptive, and limit the utility model never in any form.
Embodiment 1
The Pb of Zn and 0.46wt% of Cu, 1.53wt% of TFe, 0.36wt% of copper ashes composition: 39.12wt%;
Separating step: adopt the starch solution of copper ashes weight 10% to mix rear pelletizing as binding agent with copper ashes, obtain the copper ashes pelletizing of particle diameter 5mm, to send in rotary hearth furnace in an oxidizing atmosphere after copper ashes pelletizing is dried, oxidizing roasting process 25 minutes is carried out under 850 degrees Celsius, obtain the copper ashes pelletizing through oxidizing roasting process, wherein, rotary hearth furnace burner fuel is Sweet natural gas, coefficient of excess air gets 1.3, oxygen more than needed in stove, then the copper ashes pelletizing through oxidizing roasting process is carried out pelletizing as mother bulb, outside parcel reduction coal, Wingdale and wilkinite compound (compound composition quality ratio is reductive agent: Wingdale: wilkinite=100:40:20), wherein, reductive agent fixed carbon content is 65wt%, in Wingdale, CaO content is 90wt%, obtain the pelletizing material that particle diameter is 8mm, then will to send in rotary hearth furnace after pelletizing drying materials under reducing atmosphere, reducing roasting is carried out 35 minutes temperature 1200 DEG C, obtain the pelletizing after reducing and the flue gas containing zinc oxide and plumbous oxide, wherein, rotary hearth furnace burner fuel is Sweet natural gas, air coefficient gets 1.1, oxygen-free gas in stove, then break process is carried out by after the pelletizing cooling after reduction, obtain the mixture containing metallic iron and tailings, then be carry out magnetic separation process under the condition of 800 oersteds in magneticstrength by the obtained mixture containing metal iron powder and tailings, thus metal iron powder and tailings can be obtained respectively, wherein metallic iron TFe content is 94.15wt%, iron recovery 92.22%, the oxide powder and zinc ZnO content 67.5wt% collected, zinc recovery 91%, the lead oxide powder PbO content collected is 5.5wt%, lead recovery is 92%.
Embodiment 2
Copper ashes composition: with embodiment 1;
Separating step: adopt the starch solution of copper ashes weight 10% to mix rear pelletizing as binding agent with copper ashes, obtain the copper ashes pelletizing of particle diameter 5mm, to send in rotary hearth furnace in an oxidizing atmosphere after copper ashes pelletizing is dried, oxidizing roasting process 35 minutes is carried out under 700 degrees Celsius, obtain the copper ashes pelletizing through oxidizing roasting process, wherein, rotary hearth furnace burner fuel is Sweet natural gas, coefficient of excess air gets 1.5, oxygen more than needed in stove, then the copper ashes pelletizing through oxidizing roasting process is carried out pelletizing as mother bulb, outside parcel reduction coal, Wingdale and wilkinite compound (compound composition quality ratio is reductive agent: Wingdale: wilkinite=100:40:20), wherein, reductive agent fixed carbon content is 63wt%, in Wingdale, CaO content is 90wt%, obtain the pelletizing material that particle diameter is 9mm, then will to send in rotary hearth furnace after pelletizing drying materials under reducing atmosphere, reducing roasting process is carried out 30 minutes temperature 1250 DEG C, obtain the pelletizing after reducing and the flue gas containing zinc oxide and plumbous oxide, wherein, rotary hearth furnace burner fuel is Sweet natural gas, coefficient of excess air gets 1.0, oxygen-free gas in stove, then crushing dry process is carried out by after the pelletizing cooling after reduction, obtain the mixture containing metallic iron and tailings, then be carry out magnetic separation process under the condition of 800 oersteds in magneticstrength by the obtained mixture containing metal iron powder and tailings, thus metal iron powder and tailings can be obtained, wherein metallic iron TFe content is 95.15wt%, iron recovery 92.01%, the oxide powder and zinc ZnO content 68.21wt% collected, zinc recovery 91%, the lead oxide powder PbO content collected is 5.25wt%, lead recovery is 91%.
Embodiment 3
Copper ashes composition: with embodiment 1;
Separating step: adopt the starch solution of copper ashes weight 10% to mix rear pelletizing as binding agent with copper ashes, obtain the copper ashes pelletizing of particle diameter 5mm, to send in rotary hearth furnace in an oxidizing atmosphere after copper ashes pelletizing is dried, oxidizing roasting process 35 minutes is carried out under 700 degrees Celsius, obtain the copper ashes pelletizing through oxidizing roasting process, wherein, rotary hearth furnace burner fuel is Sweet natural gas, coefficient of excess air gets 2.0, oxygen more than needed in stove, then the copper ashes pelletizing through oxidizing roasting process is carried out pelletizing as mother bulb, outside parcel reduction coal, Wingdale and wilkinite compound (compound composition quality ratio is reductive agent: Wingdale: wilkinite=100:40:20), wherein, reductive agent fixed carbon content is 65wt%, in Wingdale, CaO content is 90wt%, obtain the pelletizing material that particle diameter is 7mm, then will to send in rotary hearth furnace after pelletizing drying materials under reducing atmosphere, reducing roasting process is carried out 30 minutes temperature 1250 DEG C, obtain the pelletizing after reducing and the flue gas containing zinc oxide and plumbous oxide, wherein, rotary hearth furnace burner fuel is Sweet natural gas, air coefficient gets 0.9, oxygen-free gas in stove, then crushing dry process is carried out by after the pelletizing cooling after reduction, obtain the mixture containing metallic iron and tailings, then be carry out magnetic separation process under the condition of 1200 oersteds in magneticstrength by the obtained mixture containing metal iron powder and tailings, thus metal iron powder and tailings can be obtained, wherein metallic iron TFe content is 94.97wt%, iron recovery 92.15%, the oxide powder and zinc ZnO content 70.21wt% collected, zinc recovery 92%, the lead oxide powder PbO content collected is 5.29wt%, lead recovery is 91%.
Embodiment 4
Copper ashes composition: with embodiment 1;
Separating step: adopt the starch solution of copper ashes weight 10% to mix rear pelletizing as binding agent with copper ashes, obtain the copper ashes pelletizing of particle diameter 5mm, to send in rotary hearth furnace in an oxidizing atmosphere after copper ashes pelletizing is dried, carry out oxidizing roasting process 30 minutes at 750 degrees c, obtain the copper ashes pelletizing through oxidizing roasting process, wherein, rotary hearth furnace burner fuel is Sweet natural gas, coefficient of excess air gets 2.0, oxygen more than needed in stove, then the copper ashes pelletizing through oxidizing roasting process is carried out pelletizing as mother bulb, outside parcel reduction coal, Wingdale and wilkinite compound (compound composition quality ratio is reductive agent: Wingdale: wilkinite=100:40:20), wherein, reductive agent fixed carbon content is 78wt%, in Wingdale, CaO content is 90wt%, obtain the pelletizing material that particle diameter is 6mm, then will to send in rotary hearth furnace after pelletizing drying materials under reducing atmosphere, reducing roasting process is carried out 25 minutes temperature 1250 DEG C, obtain the pelletizing after reducing and the flue gas containing zinc oxide and plumbous oxide, wherein, rotary hearth furnace burner fuel is Sweet natural gas, air coefficient gets 0.9, oxygen-free gas in stove, then crushing dry process is carried out by after the pelletizing cooling after reduction, obtain the mixture containing metallic iron and tailings, then be carry out magnetic separation process under the condition of 1200 oersteds in magneticstrength by the obtained mixture containing metal iron powder and tailings, thus metal iron powder and tailings can be obtained, wherein metallic iron TFe content is 95.52wt%, iron recovery 92.37%, the oxide powder and zinc ZnO content 70.38wt% collected, zinc recovery 92%, the lead oxide powder PbO content collected is 5.20wt%, lead recovery is 91%.
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification sheets or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.
Claims (3)
1. the system of separating valuable metals from copper ashes, is characterized in that, comprising:
First mixed pelletizing device, described first mixed pelletizing device has the outlet of copper ashes entrance, the first binding agent entrance and copper ashes pelletizing;
Drying installation, described drying installation has copper ashes pelletizing entrance and the outlet of dry copper ashes pelletizing, and described copper ashes pelletizing entrance exports with described copper ashes pelletizing and is connected;
Oxidizing roasting device, described oxidizing roasting device has the pelletizing outlet after dry copper ashes pelletizing entrance and oxidation, and described dry copper ashes pelletizing entrance exports with described dry copper ashes pelletizing and is connected;
Second mixed pelletizing device, described second mixed pelletizing device has pelletizing entrance, reductive agent entrance, additive entrance, the second binding agent entrance and pelletizing material outlet after oxidation, and the pelletizing entrance after described oxidation exports with the pelletizing after described oxidation and is connected;
Reduction roasting device, described reduction roasting device has the pelletizing outlet after pelletizing material inlet, reduction and exhanst gas outlet, and described pelletizing material inlet is connected with described pelletizing material outlet;
Shredder assembly, described shredder assembly has the pelletizing entrance after reduction and mixture outlet, and the pelletizing entrance after described reduction exports with the pelletizing after described reduction and is connected; And
Concentration equipment, described concentration equipment has mixture inlet, metal iron powder outlet and tailings outlet, and described mixture inlet is connected with described mixture outlet.
2. the system of separating valuable metals from copper ashes according to claim 1, is characterized in that, described oxidizing roasting device is the rotary hearth furnace with oxidizing atmosphere.
3. the system of separating valuable metals from copper ashes according to claim 1, is characterized in that, described reduction roasting device is the rotary hearth furnace with reducing atmosphere.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105907944A (en) * | 2016-04-27 | 2016-08-31 | 江苏省冶金设计院有限公司 | Method and system for treating metallurgical slag |
| CN105925793A (en) * | 2016-04-27 | 2016-09-07 | 江苏省冶金设计院有限公司 | Method and system for treating zinc leaching residues |
| CN106086437A (en) * | 2016-08-01 | 2016-11-09 | 江苏省冶金设计院有限公司 | The method and system of the direct-reduction of wet method zinc smelting dreg |
| CN107123533A (en) * | 2017-05-17 | 2017-09-01 | 江苏省冶金设计院有限公司 | The system and method for preparing magnetic powder product |
| CN107299220A (en) * | 2017-05-25 | 2017-10-27 | 江苏省冶金设计院有限公司 | A kind of processing method of copper ashes |
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2014
- 2014-11-24 CN CN201420712519.8U patent/CN204281821U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105907944A (en) * | 2016-04-27 | 2016-08-31 | 江苏省冶金设计院有限公司 | Method and system for treating metallurgical slag |
| CN105925793A (en) * | 2016-04-27 | 2016-09-07 | 江苏省冶金设计院有限公司 | Method and system for treating zinc leaching residues |
| CN105925793B (en) * | 2016-04-27 | 2018-08-21 | 江苏省冶金设计院有限公司 | Handle the method and system of zinc leaching residue |
| CN106086437A (en) * | 2016-08-01 | 2016-11-09 | 江苏省冶金设计院有限公司 | The method and system of the direct-reduction of wet method zinc smelting dreg |
| CN106086437B (en) * | 2016-08-01 | 2018-08-28 | 江苏省冶金设计院有限公司 | The method and system of the direct-reduction of wet method zinc smelting dreg |
| CN107123533A (en) * | 2017-05-17 | 2017-09-01 | 江苏省冶金设计院有限公司 | The system and method for preparing magnetic powder product |
| CN107299220A (en) * | 2017-05-25 | 2017-10-27 | 江苏省冶金设计院有限公司 | A kind of processing method of copper ashes |
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