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Gold cyaniding leaching aided agent and application thereof in gold cyanide leaching process

A technology of cyanide leaching and leaching aid, applied in the application field of leaching aid and cyanide gold leaching process, can solve the problem that the ore is not very targeted, so as to improve the cyanidation effect, improve the environment, and improve the The effect of leaching rate

Inactive Publication Date: 2018-06-19
SHENYANG RES INST OF NONFERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the pertinence to ore is not very strong, it seems to be applicable to any ore

Method used

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  • Gold cyaniding leaching aided agent and application thereof in gold cyanide leaching process
  • Gold cyaniding leaching aided agent and application thereof in gold cyanide leaching process
  • Gold cyaniding leaching aided agent and application thereof in gold cyanide leaching process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The test ore is a gold dressing tailing in Dandong, Liaoning. The gold grade in the tailings is 1.7g / t, and the gold mainly occurs in the quartz gangue. Grind the ore until -0.074mm accounts for more than 90%, prepare the pulp according to the liquid-solid mass ratio of 2:1, add quicklime to make the pH value of the pulp to 11.5, and then add the leaching aid (7 parts of ammonium fluoride, 1 part of lead nitrate , 2 parts of hydrogen peroxide) 2Kg / t, stirred for 4 hours, then added sodium cyanide 1Kg / t, stirred for 36 hours until the end of leaching. The test result of embodiment 1, see table 1.

[0014] Table 1 Test results (%) of Example 1.

[0015]

[0016]

Embodiment 2

[0018] The test ore is a gold mine containing copper and arsenic sulfide. The raw ore contains 2.4g / t gold, 0.1% copper and 0.2% arsenic. The gold ore is mainly natural gold, which is closely related to sulfide, and the distribution rate of gold in chalcopyrite and arsenopyrite is more than 70%. Grind the ore until -0.074mm accounts for more than 95%, prepare the pulp according to the liquid-solid mass ratio of 2:1, add quicklime to adjust the pH value of the pulp to 12, and then add the leaching agent (6 parts of ammonium fluoride, 3 parts of lead nitrate , 1 part of hydrogen peroxide) 2Kg / t, stirred for 4 hours, then added sodium cyanide 1.5Kg / t, stirred for 48 hours until the end of leaching. The test result of embodiment 2, see table 2.

[0019] Table 2 Test results (%) of Example 2.

[0020]

Embodiment 3

[0022] The test ore is a gold-bearing tailing in Inner Mongolia. The gold grade in the tailings is 2.1g / t, basically does not contain other non-ferrous metal elements, and the gold mainly occurs in the quartz gangue. Grind the ore until -0.074mm accounts for more than 90%, prepare the pulp according to the liquid-solid ratio of 2:1, add quicklime to make the pH value of the pulp to 11, and then add the leaching aid (8 parts of ammonium fluoride, 1 part of lead nitrate, 1 part of hydrogen peroxide) 2Kg / t, stirred for 4 hours, then added sodium cyanide 2Kg / t, stirred for 48 hours until the end of leaching. The test result of embodiment 3, see table 3.

[0023] Table 3 Test results (%) of Example 3.

[0024]

[0025]

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Abstract

The invention belongs to the technical field of extraction of gold ore and gold containing gold tailings and in particular relates to a gold cyaniding leaching aided agent and application thereof in agold cyanide leaching process. The gold cyaniding leaching aided agent contains the following raw materials in parts by mass: 6-8 parts of ammonium fluoride, 1-3 parts of lead nitrate and 1-2 parts of hydrogen peroxide. During actual application, the ratio can be reasonably regulated according to ore properties. Aiming at the ore properties, the leaching aided agent is added in the gold cyanidingand leaching process, so that gangue minerals, sulfides or oxide films on surfaces of gold minerals can be effectively damaged, and exposure of the gold minerals is accelerated and enlarged. Therefore, the gold minerals can be efficiently combined with cyanides, and the leaching rate of the gold is increased.

Description

technical field [0001] The invention belongs to the technical field of gold extraction from gold ore and gold-containing tailings, and in particular relates to a leaching aid for improving the gold leaching rate and its application in a cyanidation gold leaching process. Background technique [0002] Gold is widely used in the aerospace industry and electrical, electronic, and medical industries. my country has a large demand for gold and is a big gold consumer. Among the proven reserves of gold in my country, there are mainly vein gold, placer gold and polymetallic associated gold, of which vein gold and placer gold account for about 75%, and associated gold account for about 25%. Among China's gold resource reserves, refractory resources account for about 15% of the existing resource reserves, and low-grade ore accounts for about 1 / 3 of the identified gold resources. With the increasing demand for gold and the massive development and utilization of mineral resources, the...

Claims

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Application Information

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IPC IPC(8): C22B11/08C22B3/16
CPCC22B3/16C22B11/08Y02P10/20
Inventor 陈新林马忠臣于雪马延全杨长颖
Owner SHENYANG RES INST OF NONFERROUS METALS
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