Production process of high-purity gold

A production process and pure gold technology, which is applied in the field of high-purity gold production process, can solve the problems of long electrolysis production cycle, volatile extraction agent, and potential safety hazards, so as to shorten the gold melting process cycle, speed up the gold melting speed, and reduce the price. cheap effect
CN112210674AInactive Publication Date: 2021-01-12深圳市点金贵金属精炼有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
深圳市点金贵金属精炼有限公司
Publication Date
2021-01-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a production process of high-purity gold, and relates to the technical field of metal refining. The production process comprises the following steps that: S1, gold is dissolvedin aqua regia, wherein crude gold is added to aqua regia and dissolved to make a solution, and after nitrate is removed, filtering is conducted to obtain a crude gold solution; S2, reduction is conducted, wherein a reducing agent is added to the crude gold solution obtained in S1, filtering is conducted to obtain primary fine gold powder, and the primary fine gold powder is washed with pure wateruntil the primary fine gold powder is neutral; S3, acid leaching is conducted, wherein the primary fine gold powder obtained in S2 is put into a nitric acid solution, soaked and then filtered, and pure fine gold powder is obtained; and S4, gold smelting is conducted, wherein the pure fine gold powder obtained in S3 is washed with pure water, dried, inspected, and used for preparing the high-purity gold product through ingot casting after being inspected to be qualified. The production process has the technical effects of high production safety, short process flow period and good controllability.
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Description

technical field

[0001] The invention relates to the technical field of metal refining, in particular to a production process of high-purity gold. Background technique

[0002] High-purity gold refers to gold products with a purity of 99.999%, marked as Au99999. High-purity gold is the necessary raw material for the production of gold wires for semiconductor connections. It has good manufacturability and can be easily processed into ultra-thin gold foil, micron gold wire and gold powder, and plated on the surface of other metals, pottery and glass. High-purity gold is welded and forged under a certain pressure, and can also be made into superconductors and organic gold, which can be widely used in modern high-tech enterprises such as electronic technology, communication technology, aerospace technology, chemical technology, and medical technology.

[0003] At present, high-purity gold production processes include electrolysis, solvent extraction and chemical reduction. Amon...

Claims

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