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Gold extracting agent and gold extracting process using same

A chemical and process technology, applied in the field of hydrometallurgy, can solve the problems of low gold recovery rate, large chemical consumption, imperfect leaching follow-up process, etc., and achieve the effect of accelerating gold leaching reaction, reducing energy consumption, and rapid and efficient reaction

Active Publication Date: 2019-08-30
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Therefore, the existing wet process includes thiourea method, thiosulfate method, halogenation method, lime sulfur method and other leaching processes, or there are insufficient environmental protection, or the chemical consumption is too large, or the subsequent leaching process is not enough. Perfect, low gold recovery

Method used

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  • Gold extracting agent and gold extracting process using same
  • Gold extracting agent and gold extracting process using same
  • Gold extracting agent and gold extracting process using same

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Embodiment 1～6

[0060] Embodiments 1 to 6 of the present invention provide six groups of ore samples of different types and properties as gold-bearing materials in wet gold extraction experiments. The specific operations are as follows:

[0061] (1) Ore breaking: each group of gold-bearing materials is fully crushed in the two-stage crushing and two-stage screening closed-circuit crushing system composed of jaw crusher, double-roller crusher and 2mm sieve. After screening, the materials larger than 2mm are returned The roller crusher continues to crush, and the material smaller than 2mm is used as grinding material.

[0062] (2) Grinding: After the ore is broken, feed the material less than 2mm obtained in step (1) into a roller ball mill for grinding, and set the ball milling time according to the occurrence state of gold in different minerals and the fragility of the minerals. Grind until the particle size composition is less than 200 mesh (less than 0.074mm) accounting for more than 95%. ...

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Abstract

The invention discloses a gold extracting agent and a gold extracting process using the same, and relates to the field of hydrometallurgy. The gold extracting agent comprises, by mass, 5-30 parts of leaching agents and 4-10 parts of auxiliary leaching agents, wherein the leaching agents comprise one or a combination of several of halogenated five-membered cyclic imine, five-membered cyclic imide,cyanoacetamide, and trichloroisocyanuric acid; and the auxiliary leaching agents comprise one or a combination of several of KI, NaI, KBr, NaBr, NaCl, KCl, EDTA-2Na, Na2CO3, CaCO3 and talc. Accordingto the gold extraction agent, halogen and various strong oxidizing free radicals are slowly released during reaction, so that the gold extraction agent has high activity, the reaction of gold oxide israpid and efficient, gold ions form a gold-containing coordination compound with high stability in the presence of an extractant and an auxiliary extractant, and compared with cyanide, thiourea, chlorine, bromine and other gold extraction agents, the gold extraction agent is nontoxic or extremely low in toxicity, so that the gold extraction rate reaches 90% or above

Description

technical field [0001] The present invention relates to the full hydrometallurgy extraction technology of precious metals in the field of hydrometallurgy, in particular to a gold extraction agent and a gold extraction process using the gold extraction agent, which is environmentally friendly, economical, and economical from gold-containing minerals and gold-containing electronic waste. Extract gold efficiently. Background technique [0002] Gold is one of the rare and precious metals, an important strategic resource, and a currency reserve resource. At the same time, as an important industrial raw material, gold has important applications in jewelry industry, medical treatment, electronic industry, modern communication, aerospace industry and other departments. [0003] At present, my country's gold industry is mainly produced by cyanidation. The cyanidation method uses cyanide, such as an aqueous solution of sodium cyanide and potassium cyanide, to dissolve the natural go...

Claims

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Application Information

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IPC IPC(8): C22B3/04C22B1/00C22B11/00
CPCC22B1/00C22B3/04C22B11/04Y02P10/20
Inventor 陈运法刘翔王永良叶树峰肖力
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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