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A method to increase the biooxidation rate of fine-grained encased refractory gold ores

A technology for refractory gold ore and biological oxidation, applied in the direction of improving process efficiency, can solve problems such as insoluble, long production cycle, difficult recovery, etc., and achieve the effects of increased specific surface area, energy saving and strong applicability

Active Publication Date: 2021-06-18
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a method for increasing the biological oxidation rate of fine-grained wrapped refractory gold ores to solve the problem that the gold particle size in fine-grained wrapped gold ores is very small and most of them are insoluble wrapped gold, so it is difficult to directly adopt conventional methods. Recovery by leaching, and the use of biological oxidation pretreatment combined with the problem of long production cycle of conventional gold leaching process

Method used

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  • A method to increase the biooxidation rate of fine-grained encased refractory gold ores
  • A method to increase the biooxidation rate of fine-grained encased refractory gold ores
  • A method to increase the biooxidation rate of fine-grained encased refractory gold ores

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Effect test

Embodiment 1

[0018] Include the following steps:

[0019] (1), ore ultra-fine grinding

[0020] Ultra-fine grinding of fine-grained wrapped refractory gold ore in a mill to obtain ultra-fine grinding pulp with an ore particle size of 15 μm;

[0021] (2), biological oxidation

[0022] Adjust the ultra-fine grinding pulp in step (1) to a pulp concentration of 10%, adjust the pH value to 1.2, and feed it into the biological oxidation pretreatment system. The strain used is a composite ore leaching engineering flora, which is preserved in China Microbial Strain General Microbiology Center of the Preservation Management Committee, the preservation number is CGMCC No.2395, and the preservation date is March 10, 2008, including: Leptospinillum femiphilum, Acidithiobacillus caldus, thermophilic sulfur oxidizing sulfur Bacillus (Sulfobacillus thermosulfidooxidans) and archaeal bacteria Ferroplasma acidiphilum (Ferroplasma acidiphilum), the inoculum size is 10%, the temperature is maintained at 30...

Embodiment 2

[0028] Include the following steps:

[0029] (1), ore ultra-fine grinding

[0030] Ultra-fine grinding of fine-grained wrapped refractory gold ore in a mill to obtain ultra-fine grinding pulp with an ore particle size of -20 μm;

[0031] (2), biological oxidation

[0032] Adjust the ultra-fine grinding pulp in step (1) to a pulp concentration of 18%, adjust the pH value to 1.6, and feed it into the biological oxidation pretreatment system. The strain used is a composite ore leaching engineering flora, which is preserved in China Microbial Strains General Microbiology Center of the Preservation Management Committee, the preservation number is CGMCC No.2395, and the preservation date is March 10, 2008, including: Leptospinillum femiphilum, Acidithiobacillus caldus, thermophilic sulfur oxidizing sulfur Bacillus (Sulfobacillus thermosulfidooxidans) and archaeal bacteria Ferroplasma acidiphilum (Ferroplasma acidiphilum), the inoculum size is 30%, the temperature is maintained at ...

Embodiment 3

[0038] Include the following steps:

[0039] (1), ore ultra-fine grinding

[0040] Ultra-fine grinding of fine-grained wrapped refractory gold ore in a mill to obtain ultra-fine grinding pulp with an ore particle size of -25 μm;

[0041] (2), biological oxidation

[0042]Adjust the ultra-fine grinding pulp in step (1) to a pulp concentration of 25%, adjust the pH value to 2.0, and feed it into the biological oxidation pretreatment system. General Microbiology Center of the Preservation Management Committee, the preservation number is CGMCC No.2395, and the preservation date is March 10, 2008, including: Leptospinillum femiphilum, Acidithiobacillus caldus, thermophilic sulfur oxidizing sulfur Bacillus (Sulfobacillus thermosulfidooxidans) and archaeal bacteria Ferroplasma acidiphilum (Ferroplasma acidiphilum), the inoculum size is 50%, the temperature is maintained at 50 ° C, the dissolved oxygen content is 5 mg / L, and the amount of medium: (NH 4 ) 2 SO 4 , K 2 HPO 4 , Mg...

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Abstract

The invention discloses a method for increasing the biological oxidation rate of fine-grained wrapped refractory gold ore, which belongs to the technical field of hydrometallurgy. Including: (1) ultra-fine grinding the fine-grained wrapped refractory gold ore in a mill; slurrying the ultra-fine ground gold concentrate obtained in step (1), feeding it into a biological oxidation pretreatment system, Carrying out biological oxidation; (3) washing, pulping and leaching the oxidation slag obtained in step (2). On the one hand, the present invention can solve the problem that the fine sulfide package is difficult to open; on the other hand, it can shorten the oxidation time, increase the biological oxidation speed, and increase the processing capacity of the mine without changing the existing biological oxidation process flow. It has strong applicability and is convenient for implementation and management. , with better economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for increasing the biological oxidation rate of fine-grained wrapped refractory gold ore. Background technique [0002] With the large-scale mining of gold mines, the resources of easy-to-handle gold mines are decreasing day by day, and the development of complex and difficult-to-handle gold mines has become increasingly important, and will become an unavoidable important resource in the gold industry in the future. Fine-grained gold ore is a typical type of refractory gold ore. The gold in this type of gold ore may be embedded in the cracks of arsenopyrite, pyrite, pyrrhotite and other sulfide minerals in the form of fine-grained gold. Or wrapped in sulfide minerals in insoluble form, even in some ore deposits, part of the gold enters the crystal lattice of pyrite and arsenopyrite, and exists in the state of ultramicroscopic gold. Using conventional ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/18C22B11/00
CPCC22B3/18C22B11/04Y02P10/20
Inventor 王秀美张世镖李健赵国惠郝福来王怀张修超
Owner CHANGCHUN GOLD RES INST