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Refractory gold ore desulfurizing and dearsenifying method

A technology for desulfurization and arsenic removal of refractory gold mines, which is applied in the field of metallurgy, can solve the problems of cumbersome domestication steps, the leaching rate of anti-arsenic bacteria agent needs to be improved, and poor desulfurization effect, so as to avoid environmental pollution, improve crushing efficiency, and improve The effect of leaching rate

Active Publication Date: 2014-04-02
SHANDONG GOLD GUILAIZHUANG MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese invention patent CN101333599A discloses a method for oxidizing arsenic-resistant bacteria to pretreat high-arsenic complex and refractory gold mines-cyanide gold extraction. improve
Invention patent CN101538540A discloses a composite ore leaching bacterial group, which requires cumbersome domestication steps and has poor desulfurization effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A desulfurization and arsenic preparation of refractory gold ore, the active ingredient of the preparation includes the following raw materials in weight percentage:

[0028] Burkholderia 30%, acidophilus Thiobacillus ferrooxidans 20%, Sulfolobus solfatarius 20%, Bacillus subtilis 20%, Pseudomonas aeruginosa 10%.

[0029] The Burkholderia is Burkholderia sp.D54, CGMCC NO.3223. The acidophilic Thiobacillus ferrooxidans is Acidithiobacillus ferrooxidans ATCC53993. The Sulfolobus solfataricus ATCC35092 is preferably Sulfolobus solfataricus. The Bacillus subtilis is Bacillus subtilis ATCC6633. The Pseudomonas aeruginosa is Pseudomonas aeruginosa ATCC15442.

[0030] The specific cultivation method is as follows:

[0031] Burkholderia: first inoculated on potato dextrose agar medium (PDA) at 28-30°C for primary slant culture, and then fermented until the number of viable bacteria in the product reached 1.0×10 8 pcs / g.

[0032] Acidophilus Thiobacillus ferrooxidans or Su...

Embodiment 2

[0037] The gold mine selected as the material is a high-sulfur and high-arsenic gold mine in Shandong Province. The main metal minerals are pyrite and arsenopyrite, and the gangue minerals are mainly quartz. The main element analysis results of the ore samples are shown in Table 1

[0038] element As Fe Cu S Au K content% 12.3 23.7 0.03 15.4 0.0048 2.1

[0039] A method for desulfurization and arsenic removal of refractory gold ore, comprising the steps of:

[0040] The refractory high-sulfur and high-arsenic gold ore is crushed by a crusher to keep the particle size of the ore particles below 10mm, and then sent to a ball mill to be ground to a particle size of 100 mesh ore powder, wherein an activator is added to the ball mill in an amount of One-thousandth of the mass of the ore; the activator is mixed according to the mass ratio of sodium silicate: kerosene of 1:1; water is added to adjust the concentration of ore powder to 30% (w / v) ore ...

Embodiment 3

[0044] Comparative test: divided into three control groups, specifically Control 1, Control 2, and Example 2 of the present invention.

[0045] Control group 1: The microbial preparation is prepared from acidophilus Thiobacillus ferrooxidans and acidophilus Thiobacillus acidophilus according to the ratio of 1:1, the dosage of sodium cyanide is 5kg / t, and the rest is the same as in Example 2; Control group 2: The microbial preparation is Acidophilus Thiobacillus ferrooxidans, Acidophilus Thiobacillus and Leptospira ferrooxidans were prepared according to the ratio of 1:1:1, the dosage of sodium cyanide was 2kg / t, and the rest were the same as in Example 2. The desulfurization rate, arsenic removal rate and gold leaching rate were obtained by testing, see Table 2.

[0046] Table 2

[0047] group Desulfurization rate% Arsenic removal rate% Gold leaching rate% Control group 1 78.13 84.29 89.35 Control group 2 82.34 92.15 93.14 this invention ...

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Abstract

The invention belongs to the technical field of metallurgy and relates to a refractory gold ore desulfurizing and dearsenifying method. A preparation used by the refractory gold ore desulfurizing and dearsenifying method is prepared from 30% of burkholderia, 20% of acidithiobacillus ferrooxidans, 20% of sulfolobus solfataricus, 20% of bacillus subtilis and 10% of pseudomonas aeruginosa. The microbial preparation used by the refractory gold ore desulfurizing and dearsenifying method is reasonable in compatibility and synergistic, so that a relatively good desulfurizing and dearsenifying effect can be achieved; the gold leaching rate is also greatly improved; and the microbial preparation can be recycled and is environment-friendly and pollution-free.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and relates to a desulfurization and arsenic removal method for refractory gold ore. Background technique [0002] With the depletion of easy-to-select gold ore resources, the development of high-sulfur and high-arsenic refractory gold ores has become a hot spot in gold development. Refractory gold ores are generally high-sulfur and high-arsenic gold ores, and their development and utilization is a worldwide problem. Refractory high-sulfur and high-arsenic gold ore is a kind of refractory gold ore, which means that the ore is leached directly after grinding, and the gold leaching rate is low or very low, mostly lower than 50%. Refractory high-sulfur and high-arsenic gold deposits are widely distributed throughout China, accounting for more than 1 / 3 of my country's proven reserves. This type of gold deposit has low grade, large scale, no obvious boundary between ore body and surrounding rock, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/11C22B11/08
CPCY02P10/20
Inventor 唐守营施兴平尹国光唐相锋姚友海刘奎玉李常明胡大伟徐安泰
Owner SHANDONG GOLD GUILAIZHUANG MINING CO LTD
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