CN102560130A - Selective leaching technology of copper and zinc in scrap copper smelting slag - Google Patents
Selective leaching technology of copper and zinc in scrap copper smelting slag Download PDFInfo
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- CN102560130A CN102560130A CN2010106071303A CN201010607130A CN102560130A CN 102560130 A CN102560130 A CN 102560130A CN 2010106071303 A CN2010106071303 A CN 2010106071303A CN 201010607130 A CN201010607130 A CN 201010607130A CN 102560130 A CN102560130 A CN 102560130A
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- copper
- zinc
- leached
- smelting slag
- scrap
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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 provides a selective leaching technology of copper and zinc in scrap copper smelting slag. The selective leaching technology is used for simultaneously controlling the pH (Potential of Hydrogen) and the Eh of leaching liquor in a leaching process of the scrap copper smelting slag, and thus the copper and the zinc in the scrap copper smelting slag can be selectively leached step by step. In the leaching process, by controlling the pH to be larger than 3 and less than 6 and controlling the Ep to be larger than -0.7 and less than 0, the zinc in the scrap copper smelting slag can be leached, and the copper in the scrap copper smelting slag cannot be leached or less copper in the scrap copper smelting slag can be leached. After the zinc is leached, the copper in the scrap copper smelting slag can be leached by adjusting the pH to be less than 3 and the Ep to be larger than 0.3, thus the selective leaching of the copper and the zinc can be achieved, the burden for subsequent separation of the copper and the zinc is reduced, the basis is provided for the efficient processing of the scrap copper smelting slag, and the subsequent separation of the copper and the zinc in the scrap copper smelting slag is simple and easy to realize. The selective leaching technology is easy to implement in the industrial field, has a low cost and cannot pollute the environment.
Description
Technical field
The present invention relates to the copper zinc selectivity extract technology in a kind of useless composition brass metallurgical slag, particularly a kind of pH value and current potential through controlling leaching process simultaneously makes the copper zinc selectivity extract technology in the useless composition brass metallurgical slag.
Background technology
The output of China's reclaimed copper in 2008 is 1,900,000 tons, and the ultimate production of copper is 3,950,000 tons, has almost accounted for the half the of ultimate production.The reclaimed copper output that expects China in 2015 will reach 3,350,000 tons, be equivalent to the ultimate production of copper in 2007.
With respect to smelting from copper ore concentrates, useless composition brass regeneration is per ton to can save energy 80～90%, reduces 2.61 tons of solid waste, and reduces exhaust gas discharging such as SO2 significantly.And Copper Product in China is through a large amount of uses of nearly decades, and useless composition brass resource market progressively forms, and this reprocessing cycle for useless composition brass has been created favourable condition.In useless composition brass regeneration industry, annual can a large amount of waste residue and the dust of output, contain higher valuable metal in these dirt slags, if reasonably do not dispose, contaminate environment not only, and cause the waste of resource.The lime-ash of China's contracts is transferred to the processing of dressing-works except that minority has the super-sized enterprises in dressing-works between ten thousand tons of 20-30, and the overwhelming majority all is to adopt pyrogenic process to extract by peanut, and metal recovery rate is low, and energy consumption is high, and is seriously polluted.
Therefore, taking copper ashes copper smelting slag intensification treatment process more reasonable, energy-conservation, cleaning is to develop a circular economy, and walks the inevitable choice of sustainable development road.
Adopting the key of the useless composition brass metallurgical slag of wet processing is that valuable metal is wherein leached, and valuable metal such as copper, zinc is separated obtaining metallic copper, zinc or corresponding product then.Copper and zinc are easy to leached together in useless composition brass metallurgical slag leaching process, like this, have increased the isolating difficulty of subsequent copper zinc, and cost improves.If in leaching process, control leaching condition, the zinc in the metallurgical slag is at first leached, then; Through the adjustment leaching condition, copper is leached, like this; Reduce just containing mutually of copper zinc in a large number in the leach liquor, thereby follow-up separation is become simply, and separation costs and difficulty are reduced greatly.The present invention is exactly the purpose that leaches for the selectivity that reaches copper zinc in the useless composition brass metallurgical slag, adopts the method for controlling pH value and current potential simultaneously, zinc is leached earlier, and then leach copper, thereby simplify follow-up separation circuit.
Summary of the invention
The objective of the invention is at present in useless composition brass metallurgical slag treating processes in the leached mud in the process of valuable metal copper and zinc copper leached with the zinc while, and cause subsequent copper zinc separating technology complicacy, the problem that demand strict technology, cost is high; Adopt the method for controlling leaching process pH value and current potential simultaneously; Zinc in the slag is leached earlier, and then leach copper, the sepn process of subsequent copper zinc is simplified; Cost reduces, and efficient improves.
For reaching the foregoing invention purpose, the present invention adopts following technical scheme:
In the leaching process of useless composition brass metallurgical slag; Through vitriolic add-on in the adjustment leaching process; The pH value of strict control leaching process makes it to remain between 3＜pH＜6, and the current potential that adopts the method control leach liquor that adds reductive agent simultaneously is between-0.7＜Eh＜0.So just can make during zinc in the metallurgical slag leaches into easily, and copper remains on solid state.After accomplishing after the leaching of zinc, pH＜3 of adjustment leach liquor, Eh＞0.3, like this, the copper in the metallurgical slag also is dissolved in the leach liquor.Thereby making copper and zinc reach selectivity leaches
Advantage of the present invention: the used technology of (1) the present invention is employed in leaching process easily; (2) the method ratio of the used regulation and control current potential of the present invention is easier to realize; (3) pH value adjustment method of the present invention is very easy to realize.(4) technology of the present invention is easy to industrial realization in the leaching process of useless composition brass metallurgical slag, and processing ease can not produce pollution to environment.This technology can make copper and zinc in the useless composition brass metallurgical slag under different leaching conditions, leaches zinc earlier, is leaching copper then, makes in the follow-up copper ashes treating processes relatively that the copper zinc sepn process of difficulty becomes simply, and is easy.Valuable metal in the useless composition brass metallurgical slag is effectively reclaimed.
Embodiment
Useless composition brass metallurgical slag is added in the leaching container; In other container, add entry and an amount of sulfuric acid; The pH value of solution is controlled within 3＜pH＜6 scopes, adds an amount of reductive agent (like sodium sulphite) again, detect its current potential between-0.7＜Eh＜0 with potentiometer.With joining solution be added in the leaching of metallurgical slag, and begin to stir, monitor the pH value and the current potential of leach liquor in the leaching process at any time; The current potential and the pH value of leach liquor are remained in the above scope always, leach and to leach the filtration of residue slag in 20 minutes after the kind, obtain zinciferous leach liquor; Filter residue adds acid and reductive agent again; Make it to remain on pH＜3, in Eh＞0.3 scope, leach and obtained copper bearing leach liquor after the kind in 20 minutes.Thereby the selectivity that realizes useless composition brass metallurgical slag leaches.
Embodiment
Embodiment 1, carried out selectivity for useless composition brass copper rod metallurgical slag and leached test, and the pH value is controlled at about 4.5, and control of Electric potentials is-0.35, and two sections extraction times all are 20 fens kinds, and it is as shown in the table to leach the result.Can find out that the content of the zinc in the zinc lixiviating solution reaches 86.88%, and copper has only 12.60%.Copper is 84.10% in the copper leach liquor, and zinc is 6.82%.It is obvious that selectivity leaches effect.
| Leach operation | Cu(％) | Zn(％) |
| Soak zinc | 12.60 | 86.88 |
| Soak copper | 84.10 | 6.82 |
| Add up to | 96.70 | 93.70 |
Embodiment 2, carried out selectivity for useless composition brass copper rod metallurgical slag and leached test, and the pH value is controlled at about 4.0, and control of Electric potentials is-0.20, and two sections extraction times all are 20 fens kinds, and it is as shown in the table to leach the result.Can find out that the content of the zinc in the zinc lixiviating solution reaches 89.36%, and copper has only 8.60%.Copper is 90.10% in the copper leach liquor, and zinc is 6.04%.Selectivity leaches effective in embodiment 1.
| Leach operation | Cu(％) | Zn(％) |
| Soak zinc | 8.60 | 89.36 |
| Soak copper | 90.10 | 6.04 |
| Add up to | 98.70 | 95.40 |
Claims (5)
1. the copper zinc selectivity extract technology in the useless composition brass metallurgical slag is characterized in that: in the leaching process of useless composition brass metallurgical slag, be leach liquor with water, control the pH value and the current potential of leach liquor simultaneously, make copper and zinc selectivity leaching step by step in the metallurgical slag.
2. the copper zinc selectivity extract technology in a kind of useless composition brass metallurgical slag according to claim 1 is characterized in that: in leaching process, control 3＜pH＜6 ,-zinc in the waste residue is leached and copper not seldom by the amount that leaches or leach.
3. the copper zinc selectivity extract technology in a kind of useless composition brass metallurgical slag according to claim 1 and 2 is characterized in that: after zinc leached, through adjustment pH＜3, Eh＞0.3 can make the copper in the waste residue leached.
4. according to the copper zinc selectivity extract technology in claim 1 or the 2 or 3 described a kind of useless composition brass metallurgical slags, it is characterized in that: adjustment pH value is carried out through the method for adding sulfuric acid or lime.
5. the copper zinc selectivity extract technology in a kind of useless composition brass metallurgical slag according to claim 1 and 2 is characterized in that: the adjustment of current potential realizes through the method that adds sodium sulphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106071303A CN102560130A (en) | 2010-12-15 | 2010-12-15 | Selective leaching technology of copper and zinc in scrap copper smelting slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106071303A CN102560130A (en) | 2010-12-15 | 2010-12-15 | Selective leaching technology of copper and zinc in scrap copper smelting slag |
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| CN102560130A true CN102560130A (en) | 2012-07-11 |
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| CN2010106071303A Pending CN102560130A (en) | 2010-12-15 | 2010-12-15 | Selective leaching technology of copper and zinc in scrap copper smelting slag |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103898332A (en) * | 2012-12-28 | 2014-07-02 | 北京有色金属研究总院 | Technology for separating copper, zinc and iron in scrap copper smelting slag leaching process |
| CN105439357A (en) * | 2015-12-28 | 2016-03-30 | 中南大学 | Mine acid wastewater utilization and deep purification method |
| CN105803203A (en) * | 2014-12-30 | 2016-07-27 | 北京有色金属研究总院 | Method for multicycle selective leaching of copper, zinc and nickel from sludge in waste water produced by copper smelting |
| WO2018037305A1 (en) * | 2016-08-24 | 2018-03-01 | Flsmidth A/S | Methods of rapidly leaching metallic copper in sulfate systems |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050118081A1 (en) * | 2003-09-30 | 2005-06-02 | Jaguar Nickel Inc. | Process for the recovery of value metals from base metal sulfide ores |
| US7465334B2 (en) * | 2001-09-13 | 2008-12-16 | Intec Ltd. | Zinc recovery process |
-
2010
- 2010-12-15 CN CN2010106071303A patent/CN102560130A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7465334B2 (en) * | 2001-09-13 | 2008-12-16 | Intec Ltd. | Zinc recovery process |
| US20050118081A1 (en) * | 2003-09-30 | 2005-06-02 | Jaguar Nickel Inc. | Process for the recovery of value metals from base metal sulfide ores |
Non-Patent Citations (5)
| Title |
|---|
| 《Transactions of the institution of mining and metallurgy section C-mineral processing and extractive metallurgy》 20020430 A. E. Elsherief Selective dissolution of zinc from a complex sulphide ore by controlled-potential hydrochloric acid leaching 第111卷, * |
| 《有色金属再生与利用》 20051231 张邦安 铜的回收与再生利用--废杂铜利用的途径 , 第7期 * |
| A. E. ELSHERIEF: "Selective dissolution of zinc from a complex sulphide ore by controlled-potential hydrochloric acid leaching", 《TRANSACTIONS OF THE INSTITUTION OF MINING AND METALLURGY SECTION C-MINERAL PROCESSING AND EXTRACTIVE METALLURGY》 * |
| 张邦安: "铜的回收与再生利用——废杂铜利用的途径", 《有色金属再生与利用》 * |
| 曹洪杨等: "国内外铜渣的贫化", 《材料与冶金学报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103898332A (en) * | 2012-12-28 | 2014-07-02 | 北京有色金属研究总院 | Technology for separating copper, zinc and iron in scrap copper smelting slag leaching process |
| CN103898332B (en) * | 2012-12-28 | 2015-08-19 | 北京有色金属研究总院 | The technique that in copper scap metallurgical slag leaching process, copper zinc is separated with iron |
| CN105803203A (en) * | 2014-12-30 | 2016-07-27 | 北京有色金属研究总院 | Method for multicycle selective leaching of copper, zinc and nickel from sludge in waste water produced by copper smelting |
| CN105803203B (en) * | 2014-12-30 | 2018-02-06 | 北京有色金属研究总院 | A kind of method of copper zinc-nickel in multi-cycle Selectively leaching wastewater from copper smelter sludge |
| CN105439357A (en) * | 2015-12-28 | 2016-03-30 | 中南大学 | Mine acid wastewater utilization and deep purification method |
| WO2018037305A1 (en) * | 2016-08-24 | 2018-03-01 | Flsmidth A/S | Methods of rapidly leaching metallic copper in sulfate systems |
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Application publication date: 20120711 |