CN106011466A - Method for improving copper slag level in zinc hydrometallurgy process - Google Patents
Method for improving copper slag level in zinc hydrometallurgy process Download PDFInfo
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- CN106011466A CN106011466A CN201610352373.4A CN201610352373A CN106011466A CN 106011466 A CN106011466 A CN 106011466A CN 201610352373 A CN201610352373 A CN 201610352373A CN 106011466 A CN106011466 A CN 106011466A
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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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
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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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
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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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
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- 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
Abstract
The invention discloses a method for improving copper slag level in zinc hydrometallurgy process. The method is characterized in that a process of washing copper slag with water in a traditional technology is removed and replaced by the process of pickling the copper slag twice, wherein the process of pickling the copper slag twice comprises the steps of leaching copper-cadmium slag through strong acid at high temperature, slurrying the copper slag for the first time, pickling the copper slag for the first time, slurrying the copper slag for the second time, and pickling the copper slag for the second time. The method is simple and clear in process; when in the actual production, the technological conditions, such as adding sulfuric acid and water, and controlling the temperature, the acidity and the solid-to-liquid ratio, are required; the operation is simple, and the production cost is low. With the adoption of the method, water-soluble zinc and water-soluble cadmium in the copper slag can be recovered, and meanwhile, the purpose of recovering insoluble zinc and insoluble cadmium in the copper slag can be achieved, so that the copper in the copper slag can be further enriched, and as a result, the obtained copper slag is high in level; the copper content in the copper slag can be increased from 45% to be more than 65%, the zinc content in the copper slag can be decreased from 12% to be less than 7%, and the cadmium content in the copper slag can be decreased from 8% to be less than 3.5%; the whole process basically realizes a real sense of clean production; the method is environmentally friendly, and high in economic benefit.
Description
Technical field
The invention belongs to technical field of smelting, relate to zinc hydrometallurgy industry copper-cadmium slag and reclaim, a kind of method being specifically related in Zinc Hydrometallurgy Process improve copper ashes grade.
Background technology
At present, zinc hydrometallurgy industry purifying copper cadmium residues processing technique mainly uses copper-cadmium slag leaching, copper ashes pickling, copper ashes washing process to carry out copper ashes production, in slag, the metal recovery rate such as copper, cadmium, zinc is low, not only cause foreign metal enrichment in wet method system, increasing zinc hydrometallurgy cleaning procedure production cost, and the copper ashes grade obtained is relatively low, copper ashes cupric is only capable of reaching 45%, copper ashes contains zinc, is up to 12% and 8% containing cadmium respectively, limits the lifting of copper ashes economic benefit.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the invention provides a kind of method improving copper ashes grade in Zinc Hydrometallurgy Process.
The present invention adopts the following technical scheme that a kind of method improving copper ashes grade in Zinc Hydrometallurgy Process, it is characterised in that: specifically include following steps:
nullA. copper-cadmium slag high temperature high acidic oils: the copper-cadmium slag of primary purification copper removal cadmium operation output，It is that 1:2-3 adds water in copper-cadmium slag by solid-to-liquid ratio，It is mixed into wet type overflow ball mill to carry out ball milling and obtain ore pulp，Ore slurry pump after ball milling is delivered to copper-cadmium slag concentrator carry out settling to obtain supernatant and bottom ash，Supernatant returns leaching system，Bottom ash is pumped to copper-cadmium slag leaching tanks,Bottom ash adds and produces water，Control liquid-solid ratio 4:1-5:1，Then it is slowly added to, to leaching tanks, the concentrated sulphuric acid that mass concentration is 98% while ore pulp being heated up,Control mixing speed 76 revs/min，Controlling reaction temperature is 80 DEG C-90 DEG C，The control response time is 6h-8h，Course of reaction acidity Control pH value 3.5，Reaction acid control ph 3.5-4.5 eventually，In operation，When pH value controls less than 3.5，Stop acid adding，Continue reaction，When pH value is higher than 4.5，Add concentrated sulphuric acid，When pH value is less than 3.5，Stop acid adding ...，Acid adding the most repeatedly，Do not change in pH values of pulp is stable in 3.5-4.5 half an hour，React to obtain copper-cadmium slag leaching ore pulp；
B. pulp of copper ashes: copper-cadmium slag is leached ore pulp and pumps into chamber-type press filter and filter, gained filtrate enters except cadmium operation, and gained filtering residue entrance slurrying tank of copper ashes adds production water and carries out pulp, controls liquid-solid ratio 3:1-4:1, slurry time 0.5h, obtains pulp ore pulp of copper ashes；
C. pickling of copper ashes: the pulp ore pulp of copper ashes obtained is pumped into descaling bath of copper ashes, heating, it is slowly added to, to descaling bath of copper ashes, the concentrated sulphuric acid that mass concentration is 98% simultaneously, controlling reaction temperature is 70 DEG C-80 DEG C, the control response time is 3h-4h, reaction acid control ph 2.5-3.0 eventually, in operation, when pH value controls less than 2.5, stop acid adding, continue reaction, when pH value is higher than 3.0, add concentrated sulphuric acid, when pH value is less than 2.5, stop acid adding ..., acid adding the most repeatedly, do not change in pH values of pulp is stable in 2.5-3.0 half an hour, react to obtain pickling ore pulp of copper ashes；
D. copper ashes secondary pulp: the pickling ore pulp of copper ashes obtained being pumped into chamber-type press filter and carries out filtering to get filtrate and filtering residue, filtrate is a pickling filtrate, is pumped into the copper-cadmium slag leaching tanks of step A by delivery pump；Filtering residue entrance copper ashes secondary slurrying tank adds production water and carries out pulp, controls liquid-solid ratio 3:1-4:1, slurry time 0.5h, obtains copper ashes secondary pulp ore pulp；
E. copper ashes white picking: the copper ashes secondary pulp ore pulp obtained is pumped into copper ashes quadratic acid washing trough, then ore pulp is carried out the heating that heats up, it is slowly added to, to copper ashes quadratic acid washing trough, the concentrated sulphuric acid that mass concentration is 98% simultaneously, controlling reaction temperature is 70 DEG C-80 DEG C, the control response time is 3h-4h, reaction acid control ph 2.5-3.0 eventually, in operation, when pH value controls less than 2.5, stop acid adding, continue reaction, when pH value is higher than 3.0, add concentrated sulphuric acid, when pH value is less than 2.5, stop acid adding ..., acid adding the most repeatedly, do not change in pH values of pulp is stable in 2.5-3.0 half an hour, react to obtain copper ashes white picking ore pulp；
F. high-grade copper slag: the copper ashes white picking ore pulp obtained is pumped into chamber-type press filter and carries out filtering to get filtrate and filtering residue, gained filtering residue i.e. copper ashes, filtrate is white picking filtrate, and filtrate pumps into reclaims reverse circulation and use in the copper-cadmium slag leaching tanks in descaling bath of copper ashes of step C or in step A.
The invention has the beneficial effects as follows: the present invention is in order to improve copper ashes cupric index further, reduce copper ashes zinc, cadmium content, present invention eliminates the copper ashes washing step in traditional handicraft, change two sections of pickling of copper ashes, i.e. pickling copper ashes secondary pulp copper ashes white picking of pulp copper ashes of copper-cadmium slag high temperature high acidic oils copper ashes into.
nullPresent invention process is simple and clear,Actual production only needs add sulphuric acid and water、Control temperature well、Acidity、The technical conditions such as solid-to-liquid ratio，Simple to operate，Production cost is low,Invented by this，Reclaiming in copper ashes while water-soluble zinc and water-soluble cadmium，Also reached to reclaim insoluble zinc and the purpose of insoluble cadmium in copper ashes，Copper in copper ashes is made to be enriched with further，The copper ashes obtained is of high grade,Copper ashes cupric can bring up to more than 65% from 45%，Copper ashes is down to less than 7% containing zinc by 12%，Copper ashes is down to less than 3.5% containing cadmium by 8%，In addition the acid wash water in two sections of acid cleaning process of copper ashes can use with reverse circulation，As much as possible can reclaim the valuable metal in acid wash water，Whole flow process substantially realizes cleaning truly and produces，Environmentally safe，The present invention has good economic benefit、Social benefit and promotional value.
Accompanying drawing explanation
Fig. 1. Zinc Hydrometallurgy Process of the present invention improves the process chart of copper ashes grade.
Detailed description of the invention
Embodiment
1
A kind of method improving copper ashes grade in Zinc Hydrometallurgy Process, specifically includes following steps:
A. copper-cadmium slag high temperature high acidic oils: the copper-cadmium slag of primary purification copper removal cadmium operation output, it is that 1:2 adds water in copper-cadmium slag by solid-to-liquid ratio, it is mixed into wet type overflow ball mill to carry out ball milling and obtain ore pulp, ore slurry pump after ball milling is delivered to copper-cadmium slag concentrator carry out settling to obtain supernatant and bottom ash, supernatant returns leaching system, and the copper content in bottom ash is 20%；The endSlagIt is pumped to copper-cadmium slag leaching tanks, bottom ash adds and produces water, control liquid-solid ratio 4:1, then it is slowly added to, to leaching tanks, the concentrated sulphuric acid that mass concentration is 98% while ore pulp being heated up, control mixing speed 76 revs/min, controlling reaction temperature is 80 DEG C, the control response time is 6h, course of reaction acidity Control pH value 3.5, reaction acid control ph 3.5-4.5 eventually, in operation, when pH value controls less than 3.5, stop acid adding, continue reaction, when pH value is higher than 4.5, add concentrated sulphuric acid, when pH value is less than 3.5, stop acid adding ..., acid adding the most repeatedly, do not change within 4.0 half an hour when pH values of pulp is stable, react to obtain copper-cadmium slag leaching ore pulp；
B. pulp of copper ashes: copper-cadmium slag leaches ore pulp and pumps into chamber-type press filter and filter, gained filtrate enters except cadmium operation, and gained filtering residue enters slurrying tank of copper ashes and adds production water and carry out pulp, controls liquid-solid ratio3: 1, slurry time 0.5h, obtain pulp ore pulp of copper ashes；
C. pickling of copper ashes: the pulp ore pulp of copper ashes obtained is pumped into descaling bath of copper ashes, heating, it is slowly added to, to descaling bath of copper ashes, the concentrated sulphuric acid that mass concentration is 98% simultaneously, controlling reaction temperature is 70 DEG C, the control response time is 3h, reaction acid control ph 2.5-3.0 eventually, in operation, when pH value controls less than 2.5, stop acid adding, continue reaction, when pH value is higher than 3.0, add concentrated sulphuric acid, when pH value is less than 2.5, stop acid adding ..., acid adding the most repeatedly, do not change within 2.5 half an hour when pH values of pulp is stable, react to obtain pickling ore pulp of copper ashes；
D. copper ashes secondary pulp: the pickling ore pulp of copper ashes obtained being pumped into chamber-type press filter and carries out filtering to get filtrate and filtering residue, filtrate is a pickling filtrate, is pumped into the copper-cadmium slag leaching tanks of step A by delivery pump；Filtering residue entrance copper ashes secondary slurrying tank adds production water and carries out pulp, controls liquid-solid ratio 3:1, slurry time 0.5h, obtains copper ashes secondary pulp ore pulp；
E. copper ashes white picking: the copper ashes secondary pulp ore pulp obtained is pumped into copper ashes quadratic acid washing trough, then ore pulp is carried out the heating that heats up, it is slowly added to, to copper ashes quadratic acid washing trough, the concentrated sulphuric acid that mass concentration is 98% simultaneously, controlling reaction temperature is 70 DEG C, the control response time is 3h-4h, reaction acid control ph 2.5-3.0 eventually, in operation, when pH value controls less than 2.5, stop acid adding, continue reaction, when pH value is higher than 3.0, add concentrated sulphuric acid, when pH value is less than 2.5, stop acid adding ..., acid adding the most repeatedly, when pH values of pulp is stablized2.5Do not change in half an hour, reacted to obtain copper ashes white picking ore pulp；
F. high-grade copper slag: the copper ashes white picking ore pulp obtained is pumped into chamber-type press filter and carries out filtering to get filtrate and filtering residue, gained filtering residue i.e. copper ashes, the copper content in copper ashes is 65%；Filtrate is white picking filtrate, and filtrate pumps into reclaims reverse circulation and use in the copper-cadmium slag leaching tanks in descaling bath of copper ashes of step C or in step A.
Embodiment
2
A kind of method improving copper ashes grade in Zinc Hydrometallurgy Process, specifically includes following steps:
A. copper-cadmium slag high temperature high acidic oils: the copper-cadmium slag of primary purification copper removal cadmium operation output, it is that 1:2 adds water in copper-cadmium slag by solid-to-liquid ratio, it is mixed into wet type overflow ball mill to carry out ball milling and obtain ore pulp, ore slurry pump after ball milling is delivered to copper-cadmium slag concentrator carry out settling to obtain supernatant and bottom ash, supernatant returns leaching system, and the copper content in bottom ash is 20%；Bottom ash is pumped to copper-cadmium slag leaching tanks, bottom ash adds and produces water, control liquid-solid ratio 4:1, then it is slowly added to, to leaching tanks, the concentrated sulphuric acid that mass concentration is 98% while ore pulp being heated up, control mixing speed 76 revs/min, controlling reaction temperature is 85 DEG C, the control response time is 7h, course of reaction acidity Control pH value 3.5, reaction acid control ph 3.5-4.5 eventually, in operation, when pH value controls less than 3.5, stop acid adding, continue reaction, when pH value is higher than 4.5, add concentrated sulphuric acid, when pH value is less than 3.5, stop acid adding ..., acid adding the most repeatedly, do not change within 4.5 half an hour when pH values of pulp is stable, react to obtain copper-cadmium slag leaching ore pulp；
B. pulp of copper ashes: copper-cadmium slag is leached ore pulp and pumps into chamber-type press filter and filter, gained filtrate enters except cadmium operation, and gained filtering residue entrance slurrying tank of copper ashes adds production water and carries out pulp, controls liquid-solid ratio 3:1, slurry time 0.5h, obtains pulp ore pulp of copper ashes；
C. pickling of copper ashes: the pulp ore pulp of copper ashes obtained is pumped into descaling bath of copper ashes, heating, it is slowly added to, to descaling bath of copper ashes, the concentrated sulphuric acid that mass concentration is 98% simultaneously, controlling reaction temperature is 80 DEG C, the control response time is 4h, reaction acid control ph 2.5-3.0 eventually, in operation, when pH value controls less than 2.5, stop acid adding, continue reaction, when pH value is higher than 3.0, add concentrated sulphuric acid, when pH value is less than 2.5, stop acid adding ..., acid adding the most repeatedly, when pH values of pulp is stablized3.0Do not change in half an hour, reacted to obtain pickling ore pulp of copper ashes；
D. copper ashes secondary pulp: the pickling ore pulp of copper ashes obtained being pumped into chamber-type press filter and carries out filtering to get filtrate and filtering residue, filtrate is a pickling filtrate, is pumped into the copper-cadmium slag leaching tanks of step A by delivery pump；Filtering residue entrance copper ashes secondary slurrying tank adds production water and carries out pulp, controls liquid-solid ratio 3:1, slurry time 0.5h, obtains copper ashes secondary pulp ore pulp；
E. copper ashes white picking: the copper ashes secondary pulp ore pulp obtained is pumped into copper ashes quadratic acid washing trough, then ore pulp is carried out the heating that heats up, it is slowly added to, to copper ashes quadratic acid washing trough, the concentrated sulphuric acid that mass concentration is 98% simultaneously, controlling reaction temperature is 80 DEG C, the control response time is 3h-4h, reaction acid control ph 2.5-3.0 eventually, in operation, when pH value controls less than 2.5, stop acid adding, continue reaction, when pH value is higher than 3.0, add concentrated sulphuric acid, when pH value is less than 2.5, stop acid adding ..., acid adding the most repeatedly, when pH values of pulp is stablized3.0Do not change in half an hour, reacted to obtain copper ashes white picking ore pulp；
F. high-grade copper slag: the copper ashes white picking ore pulp obtained is pumped into chamber-type press filter and carries out filtering to get filtrate and filtering residue, gained filtering residue i.e. copper ashes, the copper content in copper ashes is 67%；Filtrate is white picking filtrate, and filtrate pumps into reclaims reverse circulation and use in the copper-cadmium slag leaching tanks in descaling bath of copper ashes of step C or in step A.
Embodiment
3
A kind of method improving copper ashes grade in Zinc Hydrometallurgy Process, specifically includes following steps:
A. copper-cadmium slag high temperature high acidic oils: the copper-cadmium slag of primary purification copper removal cadmium operation output, it is that 1:3 adds water in copper-cadmium slag by solid-to-liquid ratio, it is mixed into wet type overflow ball mill to carry out ball milling and obtain ore pulp, ore slurry pump after ball milling is delivered to copper-cadmium slag concentrator carry out settling to obtain supernatant and bottom ash, supernatant returns leaching system, and the copper content in bottom ash is 25%；Bottom ash is pumped to copper-cadmium slag leaching tanks, bottom ash adds and produces water, control liquid-solid ratio 5:1, then it is slowly added to, to leaching tanks, the concentrated sulphuric acid that mass concentration is 98% while ore pulp being heated up, control mixing speed 76 revs/min, controlling reaction temperature is 90 DEG C, the control response time is 8h, course of reaction acidity Control pH value 3.5, reaction acid control ph 3.5-4.5 eventually, in operation, when pH value controls less than 3.5, stop acid adding, continue reaction, when pH value is higher than 4.5, add concentrated sulphuric acid, when pH value is less than 3.5, stop acid adding ..., acid adding the most repeatedly, when pH values of pulp is stablized3.5Do not change in half an hour, reacted to obtain copper-cadmium slag leaching ore pulp；
B. pulp of copper ashes: copper-cadmium slag is leached ore pulp and pumps into chamber-type press filter and filter, gained filtrate enters except cadmium operation, and gained filtering residue entrance slurrying tank of copper ashes adds production water and carries out pulp, controls liquid-solid ratio 4:1, slurry time 0.5h, obtains pulp ore pulp of copper ashes；
C. pickling of copper ashes: the pulp ore pulp of copper ashes obtained is pumped into descaling bath of copper ashes, heating, it is slowly added to, to descaling bath of copper ashes, the concentrated sulphuric acid that mass concentration is 98% simultaneously, controlling reaction temperature is 80 DEG C, the control response time is 4h, reaction acid control ph 2.5-3.0 eventually, in operation, when pH value controls less than 2.5, stop acid adding, continue reaction, when pH value is higher than 3.0, add concentrated sulphuric acid, when pH value is less than 2.5, stop acid adding ..., acid adding the most repeatedly, when pH values of pulp is stablized2.5Do not change in half an hour, reacted to obtain pickling ore pulp of copper ashes；
D. copper ashes secondary pulp: the pickling ore pulp of copper ashes obtained being pumped into chamber-type press filter and carries out filtering to get filtrate and filtering residue, filtrate is a pickling filtrate, is pumped into the copper-cadmium slag leaching tanks of step A by delivery pump；Filtering residue entrance copper ashes secondary slurrying tank adds production water and carries out pulp, controls liquid-solid ratio 4:1, slurry time 0.5h, obtains copper ashes secondary pulp ore pulp；
E. copper ashes white picking: the copper ashes secondary pulp ore pulp obtained pumps into copper ashes quadratic acid washing trough, then ore pulp carries out the heating that heats up, is slowly added to, to copper ashes quadratic acid washing trough, the concentrated sulphuric acid that mass concentration is 98% simultaneously, controlling reaction temperature is80DEG C, the control response time is 3h-4h, reaction acid control ph 2.5-3.0 eventually, in operation, when pH value controls less than 2.5, stop acid adding, continue reaction, when pH value is higher than 3.0, add concentrated sulphuric acid, when pH value is less than 2.5, stop acid adding ..., acid adding the most repeatedly, when pH values of pulp is stablized2.5Do not change in half an hour, reacted to obtain copper ashes white picking ore pulp；
F. high-grade copper slag: the copper ashes white picking ore pulp obtained is pumped into chamber-type press filter and carries out filtering to get filtrate and filtering residue, gained filtering residue i.e. copper ashes, the copper content in copper ashes is 71%；Filtrate is white picking filtrate, and filtrate pumps into reclaims reverse circulation and use in the copper-cadmium slag leaching tanks in descaling bath of copper ashes of step C or in step A.
Claims (1)
1. the method improving copper ashes grade in a Zinc Hydrometallurgy Process, it is characterised in that: specifically include following steps:
nullA. copper-cadmium slag high temperature high acidic oils: the copper-cadmium slag of primary purification copper removal cadmium operation output，It is that 1:2-3 adds water in copper-cadmium slag by solid-to-liquid ratio，It is mixed into wet type overflow ball mill to carry out ball milling and obtain ore pulp，Ore slurry pump after ball milling is delivered to copper-cadmium slag concentrator carry out settling to obtain supernatant and bottom ash，Supernatant returns leaching system，Bottom ash is pumped to copper-cadmium slag leaching tanks,Bottom ash adds and produces water，Control liquid-solid ratio 4:1-5:1，Then it is slowly added to, to leaching tanks, the concentrated sulphuric acid that mass concentration is 98% while ore pulp being heated up,Control mixing speed 76 revs/min，Controlling reaction temperature is 80 DEG C-90 DEG C，The control response time is 6h-8h，Course of reaction acidity Control pH value 3.5，Reaction acid control ph 3.5-4.5 eventually，In operation，When pH value controls less than 3.5，Stop acid adding，Continue reaction，When pH value is higher than 4.5，Add concentrated sulphuric acid，When pH value is less than 3.5，Stop acid adding ...，Acid adding the most repeatedly，Do not change in pH values of pulp is stable in 3.5-4.5 half an hour，React to obtain copper-cadmium slag leaching ore pulp；
B. pulp of copper ashes: copper-cadmium slag is leached ore pulp and pumps into chamber-type press filter and filter, gained filtrate enters except cadmium operation, and gained filtering residue entrance slurrying tank of copper ashes adds production water and carries out pulp, controls liquid-solid ratio 3:1-4:1, slurry time 0.5h, obtains pulp ore pulp of copper ashes；
C. pickling of copper ashes: the pulp ore pulp of copper ashes obtained is pumped into descaling bath of copper ashes, heating, it is slowly added to, to descaling bath of copper ashes, the concentrated sulphuric acid that mass concentration is 98% simultaneously, controlling reaction temperature is 70 DEG C-80 DEG C, the control response time is 3h-4h, reaction acid control ph 2.5-3.0 eventually, in operation, when pH value controls less than 2.5, stop acid adding, continue reaction, when pH value is higher than 3.0, add concentrated sulphuric acid, when pH value is less than 2.5, stop acid adding ..., acid adding the most repeatedly, do not change in pH values of pulp is stable in 2.5-3.0 half an hour, react to obtain pickling ore pulp of copper ashes；
D. copper ashes secondary pulp: the pickling ore pulp of copper ashes obtained being pumped into chamber-type press filter and carries out filtering to get filtrate and filtering residue, filtrate is a pickling filtrate, is pumped into the copper-cadmium slag leaching tanks of step A by delivery pump；Filtering residue entrance copper ashes secondary slurrying tank adds production water and carries out pulp, controls liquid-solid ratio 3:1-4:1, slurry time 0.5h, obtains copper ashes secondary pulp ore pulp；
E. copper ashes white picking: the copper ashes secondary pulp ore pulp obtained is pumped into copper ashes quadratic acid washing trough, then ore pulp is carried out the heating that heats up, it is slowly added to, to copper ashes quadratic acid washing trough, the concentrated sulphuric acid that mass concentration is 98% simultaneously, controlling reaction temperature is 70 DEG C-80 DEG C, the control response time is 3h-4h, reaction acid control ph 2.5-3.0 eventually, in operation, when pH value controls less than 2.5, stop acid adding, continue reaction, when pH value is higher than 3.0, add concentrated sulphuric acid, when pH value is less than 2.5, stop acid adding ..., acid adding the most repeatedly, do not change in pH values of pulp is stable in 2.5-3.0 half an hour, react to obtain copper ashes white picking ore pulp；
F. high-grade copper slag: the copper ashes white picking ore pulp obtained is pumped into chamber-type press filter and carries out filtering to get filtrate and filtering residue, gained filtering residue i.e. copper ashes, filtrate is white picking filtrate, and filtrate pumps into reclaims reverse circulation and use in the copper-cadmium slag leaching tanks in descaling bath of copper ashes of step C or in step A.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109161688A (en) * | 2018-09-13 | 2019-01-08 | 白银有色集团股份有限公司 | A method of recycling copper, cadmium from copper-cadmium slag |
| CN110016567A (en) * | 2019-05-27 | 2019-07-16 | 陕西环保固体废物处置利用有限责任公司 | The method of copper is recycled in a kind of zinc hydrometallurgy copper ashes |
| CN110144464A (en) * | 2019-05-27 | 2019-08-20 | 陕西环保固体废物处置利用有限责任公司 | A method of utilizing zinc powder dechlorination in zinc hydrometallurgy copper ashes |
| CN110257633A (en) * | 2019-06-25 | 2019-09-20 | 西部矿业股份有限公司 | It is a kind of to handle wet process zinc abstraction copper-cadmium slag, method of the nickel cobalt slag to prepare copper sponge, Spongy Cadmium simultaneously |
| CN111286601A (en) * | 2018-12-07 | 2020-06-16 | 格林美（江苏）钴业股份有限公司 | Continuous slag washing device and method for wet metallurgy |
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| CN109161688A (en) * | 2018-09-13 | 2019-01-08 | 白银有色集团股份有限公司 | A method of recycling copper, cadmium from copper-cadmium slag |
| CN111286601A (en) * | 2018-12-07 | 2020-06-16 | 格林美（江苏）钴业股份有限公司 | Continuous slag washing device and method for wet metallurgy |
| CN110016567A (en) * | 2019-05-27 | 2019-07-16 | 陕西环保固体废物处置利用有限责任公司 | The method of copper is recycled in a kind of zinc hydrometallurgy copper ashes |
| CN110144464A (en) * | 2019-05-27 | 2019-08-20 | 陕西环保固体废物处置利用有限责任公司 | A method of utilizing zinc powder dechlorination in zinc hydrometallurgy copper ashes |
| CN110257633A (en) * | 2019-06-25 | 2019-09-20 | 西部矿业股份有限公司 | It is a kind of to handle wet process zinc abstraction copper-cadmium slag, method of the nickel cobalt slag to prepare copper sponge, Spongy Cadmium simultaneously |
| CN110257633B (en) * | 2019-06-25 | 2021-04-09 | 西部矿业股份有限公司 | Method for preparing sponge copper and sponge cadmium by simultaneously treating wet-process zinc smelting copper cadmium slag and nickel cobalt slag |
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