A kind of mineral gold extraction method based on mercury-free liquid alloy

A technology of liquid alloy and extraction method, which is applied in the field of extracting gold from ore powder with mercury-free liquid alloy, can solve the problems of lack of process methods, etc., and achieve the effects of safe and convenient operation process, simple equipment, and improved efficiency

Inactive Publication Date: 2021-07-16
SHANGHAI JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a method for extracting mineral gold based on mercury-free liquid alloy, which is used to solve the lack of a method for extracting gold in ore powder using mercury-free liquid alloy in the prior art method problem

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  • A kind of mineral gold extraction method based on mercury-free liquid alloy

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Effect test

Embodiment 1

[0043]A gallium-tin binary alloy is selected as the extractant, the tin element in the gallium-tin binary alloy accounts for 20% by mass, and the rest is gallium element, and the melting point of the gallium-tin binary alloy is 19°C. Put the gallium-tin binary alloy in a quartz vessel, soak it in 3% dilute hydrochloric acid aqueous solution, add gold-containing ore powder, the powder particle size of the gold-containing ore powder is 20-100 mesh, the difference between the ore powder and the gallium-tin binary alloy The volume ratio is 2:1, heated to 65°C, and continuously stirred with a magnetic stirring device for 6 hours to ensure that the ore powder and the liquid alloy are fully mixed to obtain a mixed solution. Stop stirring, and let the mixture stand for 1.5 hours. Due to the difference in density between the gallium-tin binary alloy and the ore powder, it will separate itself, and the gallium-tin binary alloy will sink to the bottom due to its higher density. Use a gau...

Embodiment 2

[0046] The gallium-indium binary alloy is selected as the extraction agent, the mass percentage of indium element in the gallium-indium binary alloy is 15%, and the rest is gallium element, and the melting point of the gallium-indium binary alloy is 15°C. Put the gallium-indium binary alloy in a quartz vessel, soak it in 3% dilute hydrochloric acid aqueous solution, add gold-containing ore powder, the powder particle size of the gold-containing ore powder is 20-100 mesh, and the ore powder and gallium-indium binary alloy The volume ratio is 2:1, heated to 80°C, and continuously stirred for 4 hours with a magnetic stirring device to ensure that the ore powder and the liquid alloy are fully mixed to obtain a mixed solution. Stop stirring, and let the mixture stand for 2 hours. Due to the difference in density between the gallium-indium binary alloy and the ore powder, it will separate itself, and the gallium-indium binary alloy will sink to the bottom due to its high density. Us...

Embodiment 3

[0049] The gallium indium tin ternary alloy is selected as the extractant, the mass percentage of the indium element in the gallium indium tin ternary alloy is 20%, the mass percentage of the tin element is 10%, and the rest is gallium element, gallium indium tin The melting point of the ternary alloy is 10°C. Put the gallium indium tin ternary alloy in a quartz vessel, soak it in 3% dilute hydrochloric acid aqueous solution, add gold-containing ore powder, the particle size of the gold-containing ore powder is 20-100 mesh, and the ore powder and gallium indium tin ternary The volume ratio of the alloy is 3:1, heated to 45°C, and continuously stirred for 12 hours with a magnetic stirring device to ensure that the ore powder and the liquid alloy are fully mixed to obtain a mixed solution. Stop stirring, and let the mixture stand for 1 hour. Due to the difference in density between the gallium-indium-tin ternary alloy and the ore powder, it will separate itself, and the gallium-...

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Abstract

The invention provides a method for extracting mineral gold based on a mercury-free liquid alloy, which includes the following steps: 1) taking a gallium-based alloy and soaking it in an anti-oxidation solution, then adding gold-containing ore powder, heating and stirring to obtain a mixed solution; 2) ) After the mixed solution is left to stand, it is filtered and separated to obtain liquid metal; 3) The liquid metal is cooled to room temperature, and the gold element is extracted from the liquid metal by electric field decomposition. The invention provides a mineral gold extraction method based on a mercury-free liquid alloy, which has a clear principle, simple equipment, safe and convenient operation process, does not need to use any mercury or cyanide and other substances in the whole process, is green and environmentally friendly, and has low loss of liquid metal. With continuous recycling, the extraction effect is obvious, the cost is low and controllable, and it is expected to be widely promoted.

Description

technical field [0001] The invention belongs to the field of precious metal extraction, and relates to a method for extracting mineral gold based on a mercury-free liquid alloy, specifically a process for extracting gold in ore powder by using a mercury-free liquid alloy. Background technique [0002] The development and utilization of gold resources is inseparable from the use of gold extraction agents. The current gold extraction methods include the amalgamation method with a long history and the cyanide gold extraction technology that has been widely used in modern times. Gold extraction by amalgamation is based on the selective wetting (capturing) of gold particles in the slurry by liquid metal mercury, so that it is separated from other metal minerals and gangue, and then mercury diffuses into the trapped gold particles to generate Amalgam (alloy). Then use high temperature treatment to distill the amalgam to volatilize and separate the mercury to obtain higher purity ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C28/00
CPCC22C28/00
Inventor 金明江金英兰
Owner SHANGHAI JIAOTONG UNIV
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