CN101956073A - Process for recycling gold and silver refined waste liquid - Google Patents
Process for recycling gold and silver refined waste liquid Download PDFInfo
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- CN101956073A CN101956073A CN2010102553190A CN201010255319A CN101956073A CN 101956073 A CN101956073 A CN 101956073A CN 2010102553190 A CN2010102553190 A CN 2010102553190A CN 201010255319 A CN201010255319 A CN 201010255319A CN 101956073 A CN101956073 A CN 101956073A
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- silver
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- recycling
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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
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Abstract
The invention relates to a process for recycling gold and silver refined waste liquid, which belongs to the technical field of metallurgy. In the process, after the refined waste liquid is subjected to precious metal recycling, the refined waste liquid is added into silver nitrate-contained waste electrolyte for precipitating silver chloride. After waste liquid, such as presoaking liquid, gold reduced liquid, silver powder replaced liquid, and the like is subjected to the precious metal recycling, the treated waste liquid contains a large number of free chloride ions and is used for replacing the traditional sodium chloride to precipitate the silver chloride, therefore, the sewage discharge of an enterprise and alkali consumption during wastewater treatment are reduced while the waste liquid is recycled, and the raw material cost is saved, and the economic benefits and social benefits of the enterprise can be simultaneously improved.
Description
Technical field
The invention belongs to metallurgical technology field, be specifically related to that a kind of waste liquid that the wet-process refining gold and silver is produced is turned waste into wealth, the technology of recycling.
Background technology
The wet chemical refining is with short production cycle because of having, advantages such as direct yield is high, wide accommodation are occupied important status in the gold and silver refining recovery method that becomes more diverse.Yet wet-process refining can produce more trade effluent, thereby causes the wasting of resources and environmental pollution.The wet-process refining gold and silver produces and contains a large amount of hydrochloric acid and a certain amount of precious metal in the tail washings usually.At present, most enterprises can idea manage to reclaim as much as possible this part precious metal, to remaining acid solution then by add in the alkali and after enter environment.This processing mode is not only wasted chemical materials, also can increase environmental pressure simultaneously.
On the other hand, the refining process of silver then needs to consume a large amount of free chloro ions: shown in the schema of Fig. 1, contain more Silver Nitrate in the waste electrolyte that electrorefining silver is produced, adopt the mode of adding sodium-chlor (free chloro ion is provided) that silver ions is settled out in the factory usually:
Cl
-+Ag
+→AgCl?↓
This operation is referred to as a silver chloride in the industry.The waste electrolyte that one cube of silver content of every processing is 60kg approximately needs to add 50kg sodium-chlor.Calculate in view of the above, even if a small-sized silver-colored refinery, the year consumption of sodium-chlor also is very surprising.
Summary of the invention
The object of the present invention is to provide a kind of technology of recycling gold and silver refining waste liquid.
Based on this purpose, the present invention has adopted following technical scheme: the recycling technology of gold and silver refining waste liquid, its step comprises: described refining waste liquid is squeezed into the waste electrolyte mid point silver chloride that contains Silver Nitrate after recycling through precious metal.
Described gold and silver refining waste liquid comprises that presoak, gold reduction back liquid are or/and the silver powder displaced liquid.
Waste liquids such as presoak, gold reduction back liquid, silver powder displaced liquid are after the precious metal recycling, wherein also contain a large amount of free chloro ions, replace original sodium-chlor to give me a little silver chloride with the waste liquid after this processing, make that waste liquid obtains recycle, in the cost that economizes in raw materials, alkali consumption when also having reduced the quantity of wastewater effluent of enterprise and having handled waste water can improve economic benefit of enterprises and social benefit simultaneously.
Description of drawings
Fig. 1 is existing silver-colored refinery practice schema;
Fig. 2 is a process flow sheet of the present invention.
Embodiment
The recycling technology of gold and silver refining waste liquid, as shown in Figure 2, its step comprises: gold and silver refining waste liquids such as presoak, gold reduction back liquid and silver powder displaced liquid are after collection, precious metal recycling, squeeze in the waste electrolyte that contains Silver Nitrate instead of part or whole sodium-chlor point silver chlorides, remain that the refining waste liquid is treated to efflux after up to standard.
The silver nitride precipitation that some silver chloride operation is produced imports in the silver chloride refining flow process, together enter silver powder displacement operation with the silver chloride charging, the silver powder displaced liquid enters in the above-mentioned recycling technology and circulates, the silver powder that displaces obtains finished product silver after electrolysis, waste electrolyte adds handles back waste liquid point silver chloride, so circulation.
Usually, the waste electrolyte of one cube of silver content 60kg of every processing needs to add sodium-chlor 50kg; If utilize refining waste liquid recycle utilization of the present invention, treated chloride ion-containing waste liquid (chlorine ion concentration is about 105g/l in hydrochloric acid) is applied to a silver chloride operation, only need squeeze into 1.2 cubes of waste liquids just can satisfy the production needs, both save material, reduced working strength of workers again.
Claims (2)
1. the recycling technology of gold and silver refining waste liquid is characterized in that, its step comprises: described refining waste liquid is squeezed into the waste electrolyte mid point silver chloride that contains Silver Nitrate after recycling through precious metal.
2. the recycling technology of gold and silver refining waste liquid according to claim 1 is characterized in that, described gold and silver refining waste liquid comprises that presoak, gold reduction back liquid are or/and the silver powder displaced liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102553190A CN101956073A (en) | 2010-08-17 | 2010-08-17 | Process for recycling gold and silver refined waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102553190A CN101956073A (en) | 2010-08-17 | 2010-08-17 | Process for recycling gold and silver refined waste liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101956073A true CN101956073A (en) | 2011-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102553190A Pending CN101956073A (en) | 2010-08-17 | 2010-08-17 | Process for recycling gold and silver refined waste liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101956073A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114477535A (en) * | 2022-01-22 | 2022-05-13 | 宿迁市兴立环保科技有限公司 | Cyclic dechlorination process for wastewater containing chlorine nitrate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103707A (en) * | 1985-05-13 | 1986-07-02 | 华东化工学院 | The comprehensive technological process of extracting gold and silver, copper from gold mine |
| CN1737171A (en) * | 2004-08-18 | 2006-02-22 | 招金矿业股份有限公司金翅岭金矿 | Method for reducing wet method smelting waste liquid pollution and saving silver immersion cost |
| CN101451187A (en) * | 2007-12-04 | 2009-06-10 | 灵宝市金源矿业有限责任公司 | Comprehensive recovery method of gold ore resource containing molybdenum multi-metal |
-
2010
- 2010-08-17 CN CN2010102553190A patent/CN101956073A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103707A (en) * | 1985-05-13 | 1986-07-02 | 华东化工学院 | The comprehensive technological process of extracting gold and silver, copper from gold mine |
| CN1737171A (en) * | 2004-08-18 | 2006-02-22 | 招金矿业股份有限公司金翅岭金矿 | Method for reducing wet method smelting waste liquid pollution and saving silver immersion cost |
| CN101451187A (en) * | 2007-12-04 | 2009-06-10 | 灵宝市金源矿业有限责任公司 | Comprehensive recovery method of gold ore resource containing molybdenum multi-metal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114477535A (en) * | 2022-01-22 | 2022-05-13 | 宿迁市兴立环保科技有限公司 | Cyclic dechlorination process for wastewater containing chlorine nitrate |
| CN114477535B (en) * | 2022-01-22 | 2023-12-12 | 宿迁市兴立环保科技有限公司 | Chlorine-containing nitrate wastewater circulating chlorine removal process |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110126 |