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Method for recycling gold from gold desorption electrolytic waste liquid

A technology for desorption electrolysis and gold recovery, which is applied in the direction of improving process efficiency and can solve problems such as gold recovery

Active Publication Date: 2020-10-16
JIANGXI SANHE GOLD IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is currently no suitable method to recover the gold in the waste liquid

Method used

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  • Method for recycling gold from gold desorption electrolytic waste liquid

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Embodiment 1

[0057] The waste liquid generated in the desorption electrolysis process (liquid phase gold grade 0.54g / m 3 ) is pumped to two φ6.0*6.5m settling tanks connected in series at the bottom for the first settling. The waste liquid in the sedimentation tank is separated from the solid and liquid through natural precipitation to obtain the first precipitate and the first clarified liquid. The first precipitate is transported to a separate φ4.5*5.0m leaching tank by pump every six months for cyanide carbon leaching ( The leaching agent is 30wt% sodium cyanide solution, the addition of sodium cyanide is preferably 20kg / t), gold metal is recovered, and the gold recovery rate of cyanide carbon leaching is more than or equal to 95.62%.

[0058] After the first clarified liquid reaches 23 cubic meters, it is transported to a φ3.0*3.5m stirring adsorption tank until the liquid height is 3.2m. Before the first clarified liquid is input into the stirring tank, 1-1.5t columnar activated carbo...

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Abstract

The invention relates to the technical field of waste liquid recycling, and provides a method for recycling gold from gold desorption electrolytic waste liquid. The method provided by the invention comprises two adsorption processes, the grade of gold in the waste liquid is relatively high during the first-time adsorption (stirring adsorption), the recovery rate is improved by adopting columnar activated carbon with relatively good activity and a stirring adsorption mode, the grade of gold in the waste liquid is relatively low during the second-time adsorption (static adsorption), adsorption is performed by adopting the static adsorption mode and adsorption columns connected in series, and then the gold in the waste liquid can be truly completely extracted. Besides, in the static adsorption process, the used activated carbon is disposable activated carbon and obsolete coconut shell activated carbon, so that the recycling cost can be effectively reduced, meanwhile, the obsolete coconutshell activated carbon is turned into wealth, so that the utilization rate of production materials is improved, and the adsorption efficiency can also be guaranteed.

Description

technical field [0001] The invention relates to the technical field of waste liquid recovery and utilization, in particular to a method for recovering gold from gold desorption electrolysis waste liquid. Background technique [0002] Biological oxidation-cyanide carbon leaching gold is the main process of gold production at present, mainly including biological oxidation pretreatment, cyanide carbon leaching, desorption electrolysis, carbon regeneration, smelting and purification, etc. The desorption electrolysis process uses desorption The liquid desorbs the gold in the gold-loaded carbon obtained by cyanidation carbon leaching, and then sends it to the electrolytic cell to obtain gold mud by electrolysis. [0003] In the process of desorption electrolysis, the recovery rate of gold in each batch of electrolysis can reach more than 99.8%, and about 0.02% of gold metal will enter the electrolyte. ) increases, the gold metal that enters in the electrolytic solution is also mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B11/00
CPCC22B7/006C22B11/042Y02P10/20
Inventor 肖光富陈发上杨卫明崔丙贵张广盛李金伟吴为荣陈建福胡诗彤涂友兵周健倪平余涛陈宇李明楷王岩郑卫红郭国英
Owner JIANGXI SANHE GOLD IND