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Branch biological oxidation technology for high-arsenic and high-sulfur gold concentrate

A technology of biological oxidation and gold concentrate, applied in the field of biometallurgical materials, can solve the problems of hindering the rapid progress of biological oxidation reaction, high arsenic cannot be removed in time, and low gold leaching rate, so as to shorten the time of biological oxidation, improve the oxidation effect, highly active effect

Active Publication Date: 2016-06-29
QINGDAO ZHIRUI BIOLOGICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing biological oxidation process still has the disadvantages that it cannot remove high-arsenic and aging bacteria liquid in time, hinders the rapid progress of biological oxidation reaction, has long oxidation time, and low gold leaching rate.

Method used

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  • Branch biological oxidation technology for high-arsenic and high-sulfur gold concentrate
  • Branch biological oxidation technology for high-arsenic and high-sulfur gold concentrate
  • Branch biological oxidation technology for high-arsenic and high-sulfur gold concentrate

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Embodiment 1

[0026] This embodiment provides a branched biological oxidation process of high-arsenic and high-sulfur gold concentrate, the process includes the following steps:

[0027] (1) Pretreatment: Grinding, grading, washing and thickening the high-arsenic and high-sulfur gold concentrate;

[0028] (2) Pulp separation: Divide the pulp into low-concentration pulp and high-concentration pulp according to the first preset volume ratio;

[0029] Wherein, the first preset volume ratio is 1:4-2:3, the concentration of the low-concentration pulp is 5%-12%, and the concentration of the high-concentration pulp is 15%-25%.

[0030] (3) Level I oxidation: Put the low-concentration pulp and the high-concentration pulp into respective Level I oxidation tanks for Level I oxidation;

[0031] (4) Second-level oxidation: After the first-level oxidation of low-concentration pulp is completed, the second preset volume ratio of low-concentration pulp is placed in the first-level oxidation tank of high-...

Embodiment 2

[0040] This embodiment provides a branch biological oxidation process of high-arsenic and high-sulfur gold concentrate, such as figure 1 As shown, the process includes the following steps:

[0041] (1) Pretreatment: Grinding, grading, washing, and thickening the high-arsenic and high-sulfur gold concentrate; the overflow goes to the reservoir, and the bottom flow of the thickener enters the slurry tank, and then is fed into the ore separator;

[0042] (2) Pulp separation: In the process of ore separation, pulp is adjusted separately, 1 / 3 volume pulp is adjusted to 10% low concentration pulp, and 2 / 3 volume pulp is adjusted to 20% high concentration pulp.

[0043] (3) Level I oxidation: Put the low-concentration pulp and the high-concentration pulp into respective Level I oxidation tanks for Level I oxidation;

[0044] (4) Second-level oxidation: After 2 days of low-concentration pulp I-level oxidation, the low-concentration pulp is divided into the first low-concentration pul...

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Abstract

The invention discloses a branch biological oxidation technology for a high-arsenic and high-sulfur gold concentrate. The branch biological oxidation technology comprises the steps that pretreatment is conducted, pulp is divided into low-concentration pulp and high-concentration pulp according to the first preset volume proportion, and the low-concentration pulp and the high-concentration pulp are placed in respective first-level oxidization tanks to be subjected to first-level oxidization; and after being subjected to first-level oxidization, the low-concentration pulp is divided into first low-concentration pulp and second low-concentration pulp, the first low-concentration pulp is placed in the first-level oxidation tank of the high-concentration pulp, first mixed pulp is formed to be subjected to first-level oxidization, high-arsenic bacterium liquid is thickened and eliminated, thickener base flow of the first mixed pulp is placed in a second-level oxidization tank of the second low-concentration pulp, second mixed pulp is formed, second-level oxidization is conducted, bacterium liquid is thickened and eliminated, and conventional cyaniding treatment is conducted. According to the branch biological oxidation technology for the high-arsenic and high-sulfur gold concentrate, the gold leaching rate is increased to 94.49% from 82.18% in the prior art and increased by 12.31%, and the biological oxidation time is effectively shortened by four days.

Description

technical field [0001] The invention relates to the technical field of biometallurgy materials, in particular to a branched biological oxidation process of high-arsenic and high-sulfur gold concentrate. Background technique [0002] In the gold industry, gold ores whose gold leaching rate is less than 70% by conventional cyanidation gold leaching technology are usually called refractory gold ores; gold ores whose gold leaching rate is less than 30% are called extremely difficult gold ores. At present, refractory gold ores can be effectively treated by the biological oxidation cyanidation gold extraction process. It can increase the gold recovery rate from 30% to 70% to more than 95%. This process is an effective method for extracting gold from arsenic and sulfur fine particle dissemination type refractory gold concentrates, and has become a general refractory gold process due to its outstanding advantages such as environmental friendliness, low investment, low cost, and rel...

Claims

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Application Information

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IPC IPC(8): C22B11/00C22B3/18
CPCC22B3/18C22B11/04Y02P10/20
Inventor 李亮杨凤吕明王海超
Owner QINGDAO ZHIRUI BIOLOGICAL CO LTD
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