CN107435099A - A kind of process for the treatment of and purification cobalt slag - Google Patents
A kind of process for the treatment of and purification cobalt slag Download PDFInfo
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- CN107435099A CN107435099A CN201410037098.8A CN201410037098A CN107435099A CN 107435099 A CN107435099 A CN 107435099A CN 201410037098 A CN201410037098 A CN 201410037098A CN 107435099 A CN107435099 A CN 107435099A
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a kind of process for the treatment of and purification cobalt slag, zinc concentrate is after sulfating roasting and leaching, the impurity such as copper, cadmium, nickel, cobalt, arsenic, antimony, iron enter neutral leachate, wherein cobalt is a kind of impurity for being difficult to remove, and the targeted purified cobalt slag of the present invention is resulting slag after organic matter removes cobalt.After the processing of this process, zinc, the rate of recovery of cobalt can respectively reach 95%, more than 90%.The purified cobalt slag of zinc hydrometallurgy cleaning procedure output is subjected to first paragraph leaching first, it is acidleach-washing to take method, and the leaching rate of zinc can reach more than 95%, and the zinc solution after concentration enters Zinc electrolysis process.Second segment leaching, the method for taking drying-heating acidleach are carried out to one section of leached mud, the leaching rate of cobalt can reach more than 90%.
Description
Technical field
The invention belongs to mineral processing and technical field of comprehensive utilization of solid waste, it is related to the Comprehensive recycle technology of cobalt slag in a kind of production of zinc hydrometallurgy.
Background technology
At present, substantial amounts of clean melt cinder is produced in zinc hydrometallurgy production process net liquid process, containing zinc average 40% or so, wherein containing a large amount of unreacted superfluous zinc powders.For the zinc in recovery clean melt cinder, zinc recovery is improved, enterprise would generally reclaim to the zinc in clean melt cinder, and method is:Purification slag sulfuric acid leaching, output net liquid copper ashes and leachate, after leachate zinc dust precipitation, output net liquid scruff and displaced liquid, displaced liquid is through except entering immersion trough or synthetical recovery production zinc sulfate in the leaching section of zinc metallurgy workshop after cobalt.For net liquid copper ashes, net liquid scruff caused by zinc recovering technique in clean melt cinder and except cobalt slag, many enterprises do not carry out synthetical recovery to valuable metal therein, but it is for sale in the form of middle slag.
During hydrometallurgy metallic zinc, a small amount of cobalt is often contained in raw material, cobalt is one of most harmful impurity in zinc hydrometallurgy, therefore has to pass through strict remove cobalt net liquid process on stream.Chifeng's zinc cobalt ore slag is the slag obtained after organic compound removes cobalt method, also contains the metallic compound such as Zn, Cd, Cu, Fe in slag.
At present for organic compound except the purified cobalt metal in the dreg comprehensive recycling process formed after cobalt is less, this patent discloses a kind for the treatment of and purification cobalt slag（The cobalt slag obtained after organic compound is handled）Technique, the rate of recovery of zinc can reach 95%, and the rate of recovery of cobalt is up to more than 90%.
The content of the invention
The present invention provides a kind of process method for the treatment of and purification cobalt slag, and purified cobalt slag is handled by two sections of leachings, with the utilization rate that this improves metal leaching rate and improves acid.
Comprise the following steps that：
S1, Weak-acid leaching is carried out to purified cobalt slag first.
S2, enter Zinc electrolysis process after being concentrated to the Weak-acid leaching liquid of acquisition.
S3, the Weak-acid leaching slag of acquisition is washed.Water lotion mixes with Weak-acid leaching liquid, enters Zinc electrolysis process after mixed liquor is concentrated.
Above step is first paragraph leaching step, and first paragraph, which leaches, takes the method for acidleach-washing to leach metal target zinc.
S4, the first paragraph leached mud of acquisition is dried.
S5, heating leaching is carried out to drying slag using sulfuric acid.
Above step is second segment leaching step, and second segment, which leaches, takes the method for drying-acidleach to leach metal target cobalt.
The present invention is described further below：
Novelty of the invention proposes the processing method of drying-acidleach in second segment leaching process, the experiment proved that, for this method by way of two sections are leached, each metal can obtain higher metal leaching rate and the rate of recovery.By leachate that first paragraph leaches to obtain can by concentration after be directly entered Zinc electrolysis.And whole technique comprehensively recovering valuable metal, reaches clean manufacturing requirement without being arranged outside waste water and gas.
Brief description of the drawings
Figure
1
It is the schematic flow sheet of the present invention.
Embodiment
Present invention is described further below with reference to embodiment.
Embodiment one
This raw material coloured Chifeng storehouse Bo Hongyexin industry Co., Ltd purified cobalt slag in being.Ground after the ore deposit is dried using grinder, take appropriate powder censorship, its composition such as table 1, mainly contain the metals such as copper, iron, zinc, cobalt, cadmium.
Table 1 dries Chifeng's purified cobalt slag analysis report
First paragraph leaching, one section of leaching condition are carried out to purified cobalt slag：Acidleach-washing.Acidleach condition is：20 DEG C of room temperature, solid-to-liquid ratio 3:1, mixing speed 50 ~ 100 r/min, mixing time 2h, sulfuric acid dosage 30g/L.After leaching terminates, leached mud is washed with running water, washing conditions are：20 DEG C of room temperature, liquid-solid ratio 3:1,50 ~ 100r/min of mixing speed, mixing time 0.5h, stirring filter after terminating.On this condition, the leaching rate of zinc can reach more than 95%, and the rate of recovery reaches more than 95%.
One section of leachate and water lotion are concentrated, the ZnSO after concentration4Solution meets the requirement of Zinc electrolysis up to 50-60g/L, and impurity is not exceeded meets Zinc electrolysis standard.
Second segment leaching is carried out to one section of cobalt slag, second segment leaching condition is drying-acidleach.Drying temperature is 150 DEG C.Leaching condition is：80 DEG C of heating, liquid-solid ratio 5:1, sulfuric acid dosage 90g/L, mixing speed 50-100r/min, mixing time 2h.On this condition, for the leaching rate of metal target cobalt up to more than 90%, the rate of recovery equally reaches more than 90%.
Embodiment two
This purified cobalt slag composition is as shown in table 2, and main component is zinc, cobalt.
The drying cleaning cobalt slag analysis report of table 2
| Analytical element | Cu | Fe | Zn | Co | Cd |
| Analysis result (%) | 0.10 | 0.24 | 26.53 | 6.98 | 6.10 |
First paragraph leaching, one section of leaching condition are carried out to purified cobalt slag：Acidleach-washing.Acidleach condition is：20 DEG C of room temperature, solid-to-liquid ratio 3:1, mixing speed 50 ~ 100 r/min, mixing time 2h, sulfuric acid dosage 50g/L.After leaching terminates, leached mud is washed with running water, washing conditions are：20 DEG C of room temperature, liquid-solid ratio 3:1,50 ~ 100r/min of mixing speed, mixing time 0.5h, stirring filter after terminating.On this condition, the leaching rate of zinc can reach more than 98%, and the rate of recovery reaches more than 95%.
One section of leachate and water lotion are concentrated, the ZnSO after concentration4Solution meets the requirement of Zinc electrolysis up to 50-60g/L, and impurity is not exceeded meets Zinc electrolysis standard.
Second segment leaching is carried out to two sections of cobalt slags, second segment leaching condition is drying-acidleach.Drying temperature is 150 DEG C.Leaching condition is：80 DEG C of heating, liquid-solid ratio 5:1, sulfuric acid dosage 120g/L, mixing speed 50-100r/min, mixing time 2h.On this condition, for the leaching rate of metal target cobalt up to more than 95%, the rate of recovery equally reaches more than 90%.
Claims (5)
- A kind of 1. process for the treatment of and purification cobalt slag, it is characterised in that：For the caused purified cobalt slag in hydrometallurgy, two sections of leaching flows are formulated, to improve the purpose of metal target leaching rate, so as to realize the recovery of metal and secondary use, the processing method of drying-acidleach is wherein employed in second segment leaching process, it the experiment proved that, for this method by way of two sections are leached, each metal can obtain higher metal leaching rate and the rate of recovery；And whole technique comprehensively recovering valuable metal, reaches clean manufacturing requirement without being arranged outside waste water and gas；The process of this patent is as follows：The purified cobalt slag of zinc hydrometallurgy cleaning procedure output is subjected to first paragraph first and leaches extraction zinc, it is acidleach-washing to take method, zinc solution after concentration enters Zinc electrolysis process, and second segment is carried out to one section of leached mud and leaches extraction cobalt, the method for taking drying-heating acidleach.
- A kind of 2. process for the treatment of and purification cobalt slag according to claim 1, it is characterized in that, zinc concentrate is after sulfating roasting and leaching, the impurity such as copper, cadmium, nickel, cobalt, arsenic, antimony, iron enter neutral leachate, wherein cobalt is a kind of impurity for being difficult to remove, the purified cobalt slag in this patent be after organic matter removes cobalt obtained by slag.
- 3. the process of a kind for the treatment of and purification cobalt slag according to claim 1, it is characterised in that it is acidleach-washing that two sections of extract technologies, which refer specifically to first paragraph, and second segment is drying-acidleach.
- 4. the process of a kind for the treatment of and purification cobalt slag according to claim 1 or claim 3, it is characterised in that optimum condition is in first paragraph leaching process：Acidleach condition is：Room temperature, solid-to-liquid ratio 3:1-5:1, mixing speed 50 ~ 200 r/min, mixing time 1.5-3h, sulfuric acid dosage 20-80g/L；Washing conditions are：Room temperature, liquid-solid ratio 3:1-5:1,50 ~ 200r/min of mixing speed, mixing time 0.5-1.5h.
- 5. a kind of process for the treatment of and purification cobalt slag according to claim 1 or claim 3, it is characterised in that optimum condition is in second segment leaching process：Drying temperature is：100-200℃；Leaching condition is：60-100 DEG C, liquid-solid ratio 5:1, sulfuric acid dosage 80-150g/L, 50 ~ 200r/min of mixing speed, mixing time 1.5-3h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410037098.8A CN107435099A (en) | 2014-01-26 | 2014-01-26 | A kind of process for the treatment of and purification cobalt slag |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108977667A (en) * | 2018-10-10 | 2018-12-11 | 赤峰中色锌业有限公司 | A method of recycling zinc from net liquid cobalt slags |
| CN110894577A (en) * | 2019-09-10 | 2020-03-20 | 曾纪斌 | Method for improving leaching rate of zinc-cobalt slag produced by purifying electrolytic zinc solution |
| CN111575491A (en) * | 2020-06-29 | 2020-08-25 | 株洲冶炼集团科技开发有限责任公司 | Resource comprehensive utilization method for purifying cobalt-nickel slag by zinc hydrometallurgy arsenic salt |
| CN113265548A (en) * | 2021-04-21 | 2021-08-17 | 内蒙古兴安铜锌冶炼有限公司 | Enrichment and recovery method of cobalt in cobalt removal agent cobalt slag |
| CN113265547A (en) * | 2021-05-26 | 2021-08-17 | 昆明冶金研究院有限公司 | Comprehensive recovery process for zinc hydrometallurgy organic purification cobalt slag |
| CN114293028A (en) * | 2021-12-09 | 2022-04-08 | 格林美（江苏）钴业股份有限公司 | Method for washing cobalt intermediate leaching residues |
-
2014
- 2014-01-26 CN CN201410037098.8A patent/CN107435099A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108977667A (en) * | 2018-10-10 | 2018-12-11 | 赤峰中色锌业有限公司 | A method of recycling zinc from net liquid cobalt slags |
| CN110894577A (en) * | 2019-09-10 | 2020-03-20 | 曾纪斌 | Method for improving leaching rate of zinc-cobalt slag produced by purifying electrolytic zinc solution |
| CN110894577B (en) * | 2019-09-10 | 2022-04-01 | 广东利昌新材料有限公司 | Method for improving leaching rate of zinc-cobalt slag produced by purifying electrolytic zinc solution |
| CN111575491A (en) * | 2020-06-29 | 2020-08-25 | 株洲冶炼集团科技开发有限责任公司 | Resource comprehensive utilization method for purifying cobalt-nickel slag by zinc hydrometallurgy arsenic salt |
| CN113265548A (en) * | 2021-04-21 | 2021-08-17 | 内蒙古兴安铜锌冶炼有限公司 | Enrichment and recovery method of cobalt in cobalt removal agent cobalt slag |
| CN113265547A (en) * | 2021-05-26 | 2021-08-17 | 昆明冶金研究院有限公司 | Comprehensive recovery process for zinc hydrometallurgy organic purification cobalt slag |
| CN114293028A (en) * | 2021-12-09 | 2022-04-08 | 格林美（江苏）钴业股份有限公司 | Method for washing cobalt intermediate leaching residues |
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