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Processing method of refractory gold ore

A treatment method and gold ore technology, applied in the field of refractory gold ore treatment, can solve the problems of unreasonable microbial compatibility, unfavorable industrial production, poor gold leaching effect, etc., and achieve the goal of improving crushing efficiency, reducing bondage, and increasing leaching rate Effect

Inactive Publication Date: 2014-04-02
徐希强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A variety of microbial leaching metallurgical technologies have been disclosed in the prior art, but there are many shortcomings. For example, desulfurization, arsenic, and decarburization cannot be achieved at the same time, and often only one of them is available; the unreasonable compatibility of microorganisms leads to poor gold leaching effect ; The operation process is cumbersome, the energy consumption is high, and it is not conducive to industrial production, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for processing difficult-to-select gold ore, which includes the following steps:

[0028] The refractory gold ore is crushed by a crusher, and then sent to a ball mill to grind to a particle size of 200 mesh ore powder. An activator is added to the ball mill, and the addition amount is one thousandth of the gold ore quality; the activator is in accordance with Sodium silicate: kerosene is mixed with a mass ratio of 1:2; water is added to adjust the mineral slurry with a concentration of 30% (w / v), and then hydrogen peroxide is added to the slurry again, and the mixture is stirred evenly. The volume ratio of the slurry is 1:200.

[0029] Put the microbial agent into the ore slurry, where the mass ratio of the microbial agent and the ore slurry is 1:100; stir while passing in air, the stirring speed is 200 rpm, and the air flow rate is 0.5m per minute 3 / m 3 The ore slurry is catalyzed by microorganisms under the condition of 30°C, and the catalysis time is 5 days. On...

Embodiment 2

[0034] The selected gold mine is a high-sulfur, high-arsenic and high-carbon gold mine in Shandong Province. The main metal minerals are arsenopyrite and pyrite, and the main non-metallic minerals are quartz, graphite and carbon. The main element analysis results of the mineral samples are shown in Table 1.

[0035] Table 1 Composition analysis of each element

[0036] Element

As

Fe

Cu

S

C

Au

K

Content%

12.6

21.3

0.04

16.1

6.9

0.0048

2.1

[0037] A method for processing difficult-to-select gold ore, which includes the following steps:

[0038] The refractory gold ore is crushed by a crusher, and then sent to a ball mill to grind to a particle size of 200 mesh ore powder. An activator is added to the ball mill, and the addition amount is one thousandth of the weight of the gold ore; the activator is in accordance with Sodium silicate: kerosene is mixed with a mass ratio of 1:2; add water to adjust the ore slurry with a concentration of 30% (w / v) of ore powder (ie: ore powde...

Embodiment 3

[0049] Bacteria effect test:

[0050] Comparative test: Divided into three control groups, specifically control 1, control 2, and control 3, group 2 of the present invention.

[0051] Control group 1: Bacterial agent is made of Thiobacillus ferrooxidans acidophilus and Thiobacillus acidophilus in a ratio of 1:1, the amount of sodium cyanide is 5kg / t, and the rest is the same as in Example 2; Control group 2: Bacterial agent is Acidophilus Thiobacillus ferrooxidans, Thiobacillus acidophilus and Leptospira ferrophila were prepared according to the ratio of 1:1:1, the amount of sodium cyanide was 2kg / t, and the rest were the same as in Example 2; Control 3: No addition The treatment method of hydrogen peroxide is as in Example 2. The desulfurization rate, arsenic removal rate, decarburization rate and gold leaching rate are obtained through testing, see Table 2.

[0052] Table 2

[0053] Group

[0054] Through comparison, it is found that the desulfurization, dearsenication and deca...

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PUM

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Abstract

The invention belongs to the field of gold ore resource dressing and particularly discloses a processing method of refractory gold ore. The method comprises the steps of smash homogenate, oxidation decarbonization, microorganism catalysis, cyanidation gold extraction and the like. The invention also discloses a microorganism microbial agent for processing refractory gold ore. When the method disclosed by the invention is utilized, sulfur, arsenic and carbon elements in the gold ore can be effectively removed, meanwhile, the leaching rate of gold elements is improved, and better application prospects are realized.

Description

Technical field [0001] The invention belongs to the field of beneficiation of gold resources, and relates to a processing method for difficult-to-dress gold ores. Background technique [0002] Refractory gold mines are usually high-arsenic, high-sulfur, high-carbon disseminated gold ore, which accounts for about two-thirds of the world's total gold resources, and more than one-third in my country. They are mainly distributed in Shandong, Guizhou, Sichuan and Gansu and other provinces. This type of gold deposit has low grade, large scale, and the boundary between the ore body and the surrounding rock is not obvious. The gold is mainly wrapped in the ore in the form of micro-submicroscopic, and it is difficult to be exposed, the leaching rate is low, and the comprehensive recovery rate is difficult. . [0003] Various types of gold ore have different beneficiation methods due to their different properties. However, gravity separation, flotation, amalgamation, cyanidation and the cur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/18C22B1/00C22B11/00
CPCY02P10/20
Inventor 徐希强李兆营
Owner 徐希强
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