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Device and method for electrodeionization-electrodeposition treatment and reuse of cyanidation gold extraction tail liquid

A technology of electrodeionization and electrodeposition, applied in chemical instruments and methods, ion exchange water/sewage treatment, special treatment targets, etc., can solve problems such as long process, acid corrosion of equipment, secondary pollution, etc., and achieve good economic benefits , high current efficiency, and zero emission

Active Publication Date: 2019-05-21
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods generally have a long process, serious acid corrosion of equipment, insufficient consideration of the recovery of heavy metals such as copper, large amounts of chemicals used and easy to cause secondary pollution, high operation and maintenance costs, and very high damage to cyanide and precipitation of heavy metals. Difficult to fully meet the standards and other defects

Method used

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  • Device and method for electrodeionization-electrodeposition treatment and reuse of cyanidation gold extraction tail liquid
  • Device and method for electrodeionization-electrodeposition treatment and reuse of cyanidation gold extraction tail liquid
  • Device and method for electrodeionization-electrodeposition treatment and reuse of cyanidation gold extraction tail liquid

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Effect test

Embodiment 1

[0028] The electrodeionization-electrodeposition treatment of the present embodiment recycles the device of gold extraction tail liquid by cyanide such as figure 1 As shown, it is composed of a positive electrode chamber 2, an ion exchange chamber 4 and a negative electrode chamber 6. The positive electrode chamber 2 is composed of a positive electrode 1 and an anion exchange membrane 3. The positive electrode material is an iridium-tantalum coated titanium anode mesh, and the positive electrode effective area is 100cm 2 , the positive electrode chamber 2 is filled with an electrolyte solution, the negative electrode chamber 6 is composed of a negative electrode 8 and a cation exchange membrane 5, the negative electrode material is a graphite plate, and the effective area of ​​the negative electrode is 100 cm 2 , fill electrolyte solution in negative electrode chamber 6, described ion exchange chamber 4 is arranged between positive electrode 1 and negative electrode 6, is prov...

Embodiment 2

[0035] The electrodeionization-electrodeposition treatment of the present embodiment recycles the device of gold extraction tail liquid by cyanide such as figure 2 As shown, it consists of a positive electrode chamber 2, an ion exchange chamber 4 and a negative electrode chamber 6. The positive electrode chamber 2 is composed of a positive electrode 1 and an anion exchange membrane 3. The positive electrode material is a titanium anode plate, and the effective area of ​​the positive electrode is 100 cm 2 , the positive electrode chamber 2 is filled with electrolyte solution, the negative electrode chamber 6 is composed of a negative electrode 8 and a cation exchange membrane 5, the negative electrode material is graphite felt, and the effective area of ​​the negative electrode is 100 cm 2 The negative electrode chamber 6 is filled with electrolyte solution, and the ion exchange chamber 4 is arranged between the positive electrode 1 and the negative electrode 6. In this embodim...

Embodiment 3

[0042] The electrodeionization-electrodeposition treatment of the present embodiment recycles the device of gold extraction tail liquid by cyanide such as figure 1 As shown, it is composed of positive electrode chamber 2, ion exchange chamber 4 and negative electrode chamber 6. The positive electrode chamber 2 is composed of positive electrode 1 and anion exchange membrane 3. The positive electrode material is titanium anode mesh, and the positive electrode effective area is 50 cm 2 , the positive electrode chamber 2 is filled with an electrolyte solution, the negative electrode chamber 6 is composed of a negative electrode 8 and a cation exchange membrane 5, the negative electrode material is a graphite rod, and the effective area of ​​the negative electrode is 50 cm 2 , fill electrolyte solution in negative electrode chamber 6, described ion exchange chamber 4 is arranged between positive electrode 1 and negative electrode 6, is provided with an ion exchange chamber in the pr...

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Abstract

The invention belongs to the field of comprehensive treatment of metallurgical wastewater, and specifically relates to a device and method for electrodeionization-electrodeposition treatment and reuse of cyanide gold extraction tail liquid. The invention uses one or more stages of ion exchange chambers to first concentrate and purify the cyanide tail liquid, and then collects the concentrated liquid into the negative electrode chamber for electrodeposition to recover heavy metals. The concentrated liquid after negative electrode electrodeposition is recycled as electrode water. . The invention has the advantages of no need to add chemical reagents, small space occupation, high current efficiency, high equipment processing efficiency, the copper in the tail liquid can be regenerated, the return water quality is stable and can be recycled on a large scale, the operation is simple, and subsequent maintenance is convenient, etc. .

Description

technical field [0001] The invention belongs to the field of comprehensive treatment of metallurgical wastewater, and in particular relates to an electrodeionization-electrodeposition treatment device and method for reusing cyanidation gold extraction tail liquid. Background technique [0002] The cyanide gold extraction process is still the most important gold extraction method so far. With the continuous mining of gold mines, there are fewer and fewer high-grade and easy-to-handle gold mines, and complex polymetallic sulfide ore-type gold deposits have become relatively common and utilized gold mines. Most of these gold mines are associated with copper-containing minerals. During the cyanidation leaching process, the copper minerals will dissolve and form copper-cyanide complex ions in the leach solution. On the one hand, the consumption of cyanide will increase, and the production cost will rise sharply; On the one hand, after subsequent gold extraction through zinc repl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F101/18C02F101/20C02F103/16
CPCC02F1/281C02F1/42C02F1/4695C02F9/00C02F2001/427C02F2101/18C02F2101/20C02F2103/16C02F2201/46185C02F2303/16
Inventor 陈国宝秦勇朱张甫
Owner NORTHEASTERN UNIV LIAONING
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