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Gold-extraction process for tail-one cyanide containing gold wrapped by original sulfides

A technology for cyaniding tailings and process methods, which is applied in chemical instruments and methods, improvement of process efficiency, wet separation, etc., can solve problems such as increasing daily processing scale, low gold recovery value, unreasonable economy, etc., and achieves Good buoyancy, the effect of saving mining and grinding costs

Inactive Publication Date: 2007-11-14
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If it is directly pre-treated, with the existing technology and economic level, no matter which pre-oxidation process is adopted, the value of recovered gold will be lower than the cost of pre-oxidation, thus making the economy unreasonable
At the same time, if the cyanide tailings are directly pre-oxidized, in order to ensure a certain amount of gold recovery, it is necessary to increase the daily processing scale, and the investment is too large

Method used

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  • Gold-extraction process for tail-one cyanide containing gold wrapped by original sulfides
  • Gold-extraction process for tail-one cyanide containing gold wrapped by original sulfides
  • Gold-extraction process for tail-one cyanide containing gold wrapped by original sulfides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A certain cyanide tailing contains Au 4.67g / t, and the content of -200 mesh is about 85%. Firstly, the cyanide tailings are adjusted to slurry and scrubbed and grind in a tower grinding and leaching machine, the ore concentration is 50%, and the ore fineness is -200 mesh accounting for 90%. Then adjust the slurry to 33% concentration and enter the flotation operation. Flotation is divided into one rough selection, one sweep selection, and two selections. For rough selection, add 240g / t copper sulfate, 16g / t butyl ammonium black medicine, 50g / t butyl xanthate, 20g / t 2# oil, and flotation time 5min. 120g / t of copper sulfate is added to the selection, and the flotation time is 3min. Add 120g / t of copper sulfate, 25g / t of butyl xanthate, 10g / t of 2# oil, and flotation time of 3min in one sweep. In the second sweep, 12g / t of butyl xanthate and 10g / t of 2# oil were selected, and the flotation time was 2min. The flotation results are as follows:

[0046] Grade of incoming alloy: 4...

Embodiment 2

[0058] A certain cyanide tailing contains Au 3.19g / t, and the content of -200 mesh is about 85%. Firstly, the cyanide tailings are adjusted to slurry and scrubbed and grind in a tower grinding and leaching machine, the ore concentration is 50%, and the ore fineness is -200 mesh accounting for 90%. Then adjust the slurry to 33% concentration and enter the flotation operation. Flotation is divided into one rough selection, one sweep selection, and two selections. Add copper sulfate 260g / t, butyl ammonium black medicine 16g / t, butyl xanthate 45g / t, 2# oil 20g / t, and flotation time 5min. 120g / t of copper sulfate is added to the selection, and the flotation time is 3min. Add 120g / t of copper sulfate, 20g / t of butyl xanthate, 10g / t of 2# oil, and floatation time of 3min in one sweep. In the second sweep, 10g / t of butyl xanthate, 10g / t of 2# oil, flotation time 2min. The flotation results are as follows:

[0059] Grade of incoming alloy: 3.19g / t;

[0060] Tailings alloy grade: 0.66g / t;

...

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Abstract

One kind of cyanidation gangue distilling gold technique method including the primary sulfide wrapped gold, first, separate the primary sulfide wrapped gold from concentrated cyanidation gangue by using flotation process method, then grind fine will contain wrapped gold sulfide ore in tower system dipping machine, after grinding, it enter strengthened alkali agitated vessel to do alkalinity normal temperature atmospheric pressure to strengthen pre-oxidation, after the pre-oxidation, add CaO breast to pulp, after pulp, enter cyaniding leaching work, and distill gold high effectively.

Description

Technical field: [0001] The invention relates to the flotation of cyanide tailings containing primary sulfide-coated gold, the ultrafine grinding of gold concentrate produced by flotation enrichment and the strengthening of alkali leaching and pre-oxidation at room temperature and pressure, and the lime milk blending and cyanide of pre-oxidized ore pulp In particular, it is a new process of flotation enrichment and hydrometallurgical processing of cyanide tailings containing gold-coated primary sulfides, so that the gold contained in primary sulfides cannot be leached and recovered from the cyanide tailings. Get effective recovery. Background technique: [0002] Mineral resources are not renewable. With the sustainable development of society and economy, the development and utilization of abandoned tailings resources has attracted attention. There are many mines in our country where the tailing ponds are stockpiled or continue to discharge the cyanide tailings (tailings) of gold ...

Claims

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Application Information

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IPC IPC(8): C22B3/12B03B5/28
CPCY02P10/20
Inventor 孟宇群宿少玲
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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