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Process for treating refractory gold ores

A process method and gold mine technology, applied in the direction of improving process efficiency, can solve the problems of unreasonable microbial compatibility, unfavorable industrial production, complicated operation process, etc., and achieve the effect of improving crushing efficiency, reducing restraint and avoiding environmental pollution.

Active Publication Date: 2014-02-26
海门市创豪工业设计有限公司
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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 process for processing refractory gold ore, comprising the steps of:

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

[0029] Put the bacterial agent into the ore slurry, wherein the mass ratio of the bacterial agent to the ore slurry is 1:100; stir while feeding the air, the stirring speed is 200 rpm, and the amount of air per minute is 0.5m 3 / m 3 The ore slurry is subjected to microbial catalysis under the condition of 30° C., and the catal...

Embodiment 2

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

[0035] Table 1 Analysis of each element composition

[0036] the 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 process for processing refractory gold ore, comprising the steps of:

[0038] The refractory gold ore is crushed by a crusher, then sent to a ball mill, and ground to a particle size of 200 mesh ore powder, wherein an activator is added to the ball mill, and the amount added is one thousandth of the mass of the gold ore; the activator is in accordance with Sodium silicate: kerosene is mixed at a mass ratio of 1:1; water is added to ...

Embodiment 3

[0049] Bacteria effect test:

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

[0051] Control group 1: the bacterial agent is acidophilus Thiobacillus ferrooxidans and acidophilic sulfur bacteria according to the ratio of 1:1, the amount of sodium cyanide is 5kg / t, and the rest are the same as in Example 2; Control group 2: the microbial agent is Acidophilus Thiobacillus ferrooxidans, acidophilus Thiobacillus and Leptospira ferrooxidans 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 Hydrogen peroxide, the processing method is general embodiment 2. The desulfurization rate, arsenic removal rate, decarburization rate and gold leaching rate were obtained through detection, see Table 2.

[0052] Table 2

[0053] group

[0054] By comparison, it is found that the de...

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Abstract

The invention belongs to the field of ore dressing of ore resources, and discloses a process for treating refractory gold ores. The method comprises the steps of: crushing and homogenizing, oxidizing and decarbonizing, carrying out microorganism catalysis and cyaniding and leaching gold. The invention also provides a microbial agent for treating the refractory gold ores. Sulphur, arsenic and carbon can be effectively removed by using the process disclosed by the invention, and the gold leaching rate is greatly increased; and the process is suitable for industrialized production.

Description

technical field [0001] The invention belongs to the field of beneficiation of mineral resources, and relates to a process for processing refractory gold ore. Background technique [0002] Refractory gold ores are usually high-arsenic, high-sulfur, and high-carbon disseminated gold ores, which account for about two-thirds of the world's total gold ore resources and more than one-third in my country, mainly distributed in Shandong, Guizhou, Sichuan and Gansu and other provinces. This type of gold deposit has low grade, large scale, indistinct boundary between ore body and surrounding rock, gold is mainly wrapped in the ore in micro-submicroscopic form, 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, but gravity separation, flotation, amalgamation, cyanidation and the current resin slurry method, carbon slurry ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B11/08C22B3/18
CPCY02P10/20
Inventor 李兆营徐希强
Owner 海门市创豪工业设计有限公司
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