New process for treating vulcanized gold-containing ore

A new process and technology for gold ore, applied in the new process field of treating sulfide gold-bearing ores, can solve the problems of high consumption of chemical liquid and high production cost, achieve high leaching rate and recovery rate, low environmental pollution and simple equipment. Effect

Active Publication Date: 2012-04-11
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process requires two stages of gold immersion, and the consumption of chemical liquid is large, so the production cost is high

Method used

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  • New process for treating vulcanized gold-containing ore
  • New process for treating vulcanized gold-containing ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The composition of a sulfide gold-bearing ore is as follows: Pb: 0.38%, Cu: 0.37%, Fe: 34.92%, S: 32.77%, SiO 2 : 13.07%, Ag: 0.0049%, Zn: 0.58%, Sb: 0.71%, Au: 0.0024%, As: 7.65%. Example process such as figure 1 As shown, the following steps are taken in order of implementation:

[0017] ① Crushing and grinding: crush and grind the massive sulfide gold-bearing ore to a particle size of 200 mesh, and sieve;

[0018] ②High pressure leaching: NH 4 SCN and NH 4 OH is configured as a leaching solution, and CuSO is added 4 ; In solution: NH 4 SCN 2mol / L, NH 4 OH 1 mol / L, CuSO 4 3 g / L; then add the sulfidized gold-containing ore after grinding and sieving into the leaching solution at a liquid-solid ratio of 5:1, and then send it to an autoclave for high-pressure leaching. The leaching conditions are: temperature 180°C , continue to feed oxygen, the oxygen partial pressure is 0.8MPa, the stirring speed is 800r / min, and the reaction time is 2 hours;

[0019] ③Liquid...

Embodiment 2

[0022] The composition of a sulfide gold-bearing ore is as follows: Pb: 0.42%, Cu: 0.50%, Fe: 33.76%, S: 30.28%, SiO 2 : 14.56%, Ag: 0.0043%, Zn: 0.55%, Sb: 0.65%, Au: 0.00246%, As: 7.80%. Take the following steps in order to implement:

[0023] ① Crushing and grinding: crush and grind the massive sulfide gold-bearing ore to a particle size of 100 mesh, and sieve;

[0024] ②High pressure leaching: NH 4 SCN and NH 4 OH is configured as a leaching solution, and CuSO is added 4 ; In solution: NH 4 SCN 4mol / L, NH 4 OH 5 mol / L, CuSO 4 2 g / L; then add the sulfidized gold-containing ore after grinding and sieving into the leaching solution at a liquid-solid ratio of 3:1, and then send it to an autoclave for high-pressure leaching. The leaching conditions are as follows: the temperature is 200°C , continue to feed oxygen, the oxygen partial pressure is 0.6MPa, the stirring speed is 300r / min, and the reaction time is 5 hours;

[0025] ③Liquid-solid separation: After the leachi...

Embodiment 3

[0028] The composition of a sulfide gold-bearing ore is as follows: Pb: 0.40%, Cu: 0.55%, Fe: 35.35%, S: 33.39%, SiO 2 : 16.46%, Ag: 0.0037%, Zn: 0.53%, Sb: 0.72%, Au: 0.00248%, As: 7.70%. Take the following steps in order to implement:

[0029] ① Crushing and grinding: crush and grind the massive sulfide gold-bearing ore to a particle size of 150 mesh, and sieve;

[0030] ②High pressure leaching: NH 4 SCN and NH 4 OH is configured as a leaching solution, and CuSO is added 4 ; In solution: NH 4 SCN 0.5mol / L, NH 4 OH 6 mol / L, CuSO 4 1 g / L; then add the sulfidized gold-containing ore after grinding and sieving into the leaching solution at a liquid-solid ratio of 10:1, and then send it to an autoclave for high-pressure leaching. The leaching conditions are: temperature 80°C , continue to feed oxygen, the oxygen partial pressure is 2.0MPa, the stirring speed is 600r / min, and the reaction time is 1 hour;

[0031] ③Liquid-solid separation: After the leaching process is com...

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Abstract

The invention relates to a new process for treating vulcanized gold-containing ore and belongs to the field of hydrometallurgy. The process comprises the following steps of: before an experiment, smashing and grinding ore into powder and screening with a 200-mesh sieve; preparing NH4SCN-NH4OH into a leaching aqueous solution, and adding CuSO4; adding the vulcanized gold-containing ore subjected to granulation and screening in a leachate in a proportion of (3-10):1; and continuously introducing oxygen, wherein the temperature is 80-200 DEG C, the oxygen partial pressure is 0.6-2.0MPa, the stirring speed is 300-800r/min, and the reaction time is 1-5 hours. In the oxidation leaching process, the vulcanized ore coated with gold is sufficiently oxidized and decomposed, so that thiocyanate ionscan be well matched with gold ions to enter into a solution, thereby improving the leaching rate and recovery rate of gold; after the leaching process is finished, solid-liquid separation is carried out, thereby realizing the primary separation of metal; and leachate slag is further processed in a back pyrometallurgy recovery section, and the gold-containing leachate is adsorbed by activated carbon and recovered.

Description

technical field [0001] The invention belongs to non-ferrous metal wet extraction metallurgy, in particular to a new process for treating sulfidized gold-bearing ores. technical background [0002] With the large-scale mining of gold mines, the gold ore resources that are easy to be smelted are decreasing day by day, and currently two-thirds of the gold resources are refractory ores, and refractory gold resources have become the main source of gold production. Refractory gold ore reserves account for 30% of the world's total gold reserves, and my country accounts for more than 20%. At present, the cyanide gold extraction process at normal temperature and pressure is generally used at home and abroad, but the cyanide leaching process takes a long time , often up to 24 hours, especially for sulfidized gold-bearing ores, not only poor selectivity, but also easily interfered by impurity ions such as arsenic, antimony, copper, etc., causing great environmental pollution, and the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04C22B3/24C22B11/00
CPCY02P10/20
Inventor 谭霖覃小龙李栋杨跃新蔡练兵曹永德曹永贵
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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