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Novel gold-tellurium separation and extraction technology for tellurium-containing gold concentrates

A gold concentrate and new process technology, which is applied to the new process field of gold and tellurium separation and extraction of tellurium-containing gold concentrate, can solve the problems of lack of extraction technology, low content, inability to price gold concentrate, etc., and achieves green environmental protection, Simple process effect

Inactive Publication Date: 2018-08-17
ZHENGZHOU UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low tellurium content (<1000 g / t) in the tellurium-bearing gold concentrate, it cannot be priced when selling the gold concentrate
Due to the lack of economically viable tellurium extraction technology, mining companies only use cyanidation to extract gold from gold concentrates, and tellurium cannot be recovered

Method used

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  • Novel gold-tellurium separation and extraction technology for tellurium-containing gold concentrates
  • Novel gold-tellurium separation and extraction technology for tellurium-containing gold concentrates

Examples

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Embodiment 1

[0030] Such as figure 1 As shown, adopt the present invention to the tellurium-containing gold concentrate of Henan Jinqu Gold Mine, Shaanxi Tongguan Gold Mine, Shandong Guilaizhuang Gold Mine, and adopt this new process to carry out the test of wet separation and extraction of gold tellurium.

[0031] The three gold concentrate samples were finely ground to -0.038mm with a ball mill, accounting for 92.4%.

[0032] The mass concentration of the pulp is adjusted to 30% with water, the pH of the pulp is adjusted to 12 with NaOH, and the green gold environmental protection gold extraction agent is added as a gold dissolving agent, the concentration of the agent is kept at 0.15%, and the leaching is performed for 24 hours.

[0033] After mining activated carbon to absorb gold in the precious liquid, add sodium sulfide to remove impurities. The excess coefficient of sodium sulfide is 1.2, the temperature for removing impurities is 60 degrees Celsius, and the purification time is 10...

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Abstract

The invention discloses a novel gold-tellurium separation and extraction technology for tellurium-containing gold concentrates. The novel gold-tellurium separation and extraction technology comprisesthe steps that firstly, the tellurium-containing gold concentrates are subjected to fine grinding, so that gold and tellurium are exposed from wrapping of sulfide ores; then, the concentration and alkalinity of ore pulp are adjusted in a stirring leaching tank through water and NaOH, an environment-friendly gold leaching agent is added, and gold and tellurium are leached simultaneously; by utilizing the characteristic that activated carbon adsorbs gold selectively but does not adsorb tellurium, gold is adsorbed and separated in a leaching pregnant solution, and gold-bearing carbon is formed; and after being subjected to impurity removing through sulphurizing salt, the tellurium-containing pregnant solution is subjected to neutralizing hydrolysis through sulfuric acid, so that tellurium isprecipitated from the solution, a rough TeO2 product is formed, and effective separation and extraction of gold and tellium are achieved. The technological method is simple in process, environmentallyfriendly and free of pollution, and the recovery rates of gold and tellurium are high.

Description

technical field [0001] The invention belongs to the technical field of beneficiation and metallurgy, and in particular relates to a new process for separating and extracting gold and tellurium from tellurium-containing gold concentrate. Background technique [0002] With the advancement of science and technology and the development of the world economy, the application fields of tellurium are becoming more and more extensive. Metallurgy, chemical industry and electronic industry are its main application fields. Tellurium also plays a unique role in the fields of glass, ceramics and pharmaceutical industries. role. [0003] The content of tellurium minerals in the earth's crust is very small, and most of them are produced together with copper, lead, and gold minerals, especially copper sulfide ore. At present, there are several main industrial production methods and processes for tellurium: (1) Tellurium is produced by smelting tellurium-containing copper anode slime produce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/12C22B3/24C22B11/08C01B19/00
CPCC01B19/004C22B3/12C22B3/24C22B11/04C22B11/08Y02P10/20
Inventor 宋翔宇孙景敏翟晓辰李荣改李翠芬李志伟王誉树耿彬黄业豪
Owner ZHENGZHOU UNIV
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