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Gold and silver mineral leaching combination agent and preparation method thereof

A combination agent and leaching technology, which is applied in the field of gold and silver mineral leaching combination agent and its preparation, can solve the problems of large influence on gold and silver leaching rate, difficulty in controlling the leaching process, and low gold and silver leaching rate, and achieve gold and silver leaching rate High, increase stability, reduce the effect of dosage

Active Publication Date: 2021-11-09
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The thiosulfate leaching method is used for leaching gold and silver usually carried out in cuproammonia system or acidic system, these two kinds of systems have own shortcoming respectively: The leaching rate of silver has a great influence, too high or too low is unfavorable to the leaching of gold and silver, especially when the mineral itself contains high copper, the leaching process is difficult to control, and the leaching rate of gold and silver is low; 2. Acidic thiosulfate When the leaching system is leached, the selectivity is poor, and the metals in all sulfides except gold and silver can be extracted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1, a gold and silver mineral leaching combination agent, made of the following raw materials in parts by weight: sodium thiosulfate 2-6; ammonia water 0.5-2; 1-butyl-3-methylimidazolium chloride 1-3 ; Sodium sulfate 0.5-1.0; The preparation method is: first add 1-butyl-3-methylimidazolium chloride salt in water, stir for 4-6min, then add the leached ore sample, stir for 20-40min, then add ammonia water, Stir for 20-40min, finally add sodium thiosulfate and sodium sulfate, stir until the leaching ends.

Embodiment 2

[0017] Embodiment 2, according to the gold and silver mineral leaching combination agent described in embodiment 1 and its preparation method, it is made of the following raw materials in parts by weight: sodium thiosulfate 2; ammonia water 0.5; 1-butyl-3-methyl Imidazolium chloride 1; sodium sulfate 0.5.

Embodiment 3

[0018] Embodiment 3, according to the gold and silver mineral leaching combination agent described in embodiment 1 or 2 and its preparation method, it is made of the following raw materials in parts by weight: sodium thiosulfate 6; ammonia water 2; 1-butyl-3- Methylimidazolium chloride 3; Sodium sulfate 1.0.

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PUM

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Abstract

A gold and silver mineral leaching combination agent and a preparation method thereof, which are made of the following raw materials in parts by weight: sodium thiosulfate 2-6; ammonia water 0.5-2; 1-butyl-3-methylimidazolium chloride 1-3 Sodium sulfate 0.5-1.0; Its preparation method is: add 1-butyl-3-methylimidazolium chloride salt in water earlier, stir 4-6min, then add the leached ore sample, stir 20-40min, then add ammoniacal liquor, Stir for 20‑40min, finally add sodium thiosulfate and sodium sulfate, and stir until the leaching ends. The combined leaching agent proposed by the invention and its application have the advantages of high gold and silver leaching rate, good selectivity, simple preparation process and strong adaptability.

Description

technical field [0001] The invention relates to the field of beneficiation hydrometallurgy, in particular to a gold and silver mineral leaching combination agent and a preparation method thereof. Background technique [0002] Chemical leaching has always been the main method for recovering gold and silver. According to different leaching agents, the leaching methods currently studied include cyanide leaching, thiosulfate leaching, halide leaching, thiocyanate leaching, and polysulfide leaching. material leaching method, nitric acid leaching method, thiourea leaching method, etc. The cyanide leaching method has been a common method for processing gold and silver mineral raw materials at home and abroad because of its good economic benefits, simple operation, and high leaching rate. However, cyanide is highly toxic and environmentally harmful. In the past 40 years, thiosulfate has been used as a The safe and efficient leaching agent has attracted people's attention, and it is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/14C22B11/00
CPCC22B3/14C22B11/04Y02P10/20
Inventor 陈杜娟郭海宁包玺琳李福兰刘坤苗梁李国栋李健民
Owner NORTHWEST RES INST OF MINING & METALLURGY INST