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Refinement technology of high-purity gold

A process, pure gold technology, applied in the direction of improving process efficiency, can solve problems such as pollution and equipment corrosion environment, and achieve the effects of wide adaptability of raw materials, high recovery rate of gold and silver, and stable product quality

Inactive Publication Date: 2015-07-22
SHANDONG ZHAOJIN GOLD & SILVER REFINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] Aiming at the deficiencies of the prior art, the present invention provides a high-purity gold refining process, which solves the problems of serious equipment corrosion and environmental pollution in the whole production process of the aqueous solution chlorination method, and realizes the transition from the production of 99.99% quality products to the production of 99.999% or more quality products mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Production of raw materials and pharmaceuticals

[0039] The gold raw materials used in production are crude gold and gold mud from Zhaojin Group. The multi-element analysis of representative materials is now listed in Table 1. The chemicals used in the production process are all industrial products. The main chemicals used are listed in Table 2 below. Show.

[0040] Table 1 Multi-element analysis of gold ingot raw materials

[0041] Au(%)

Ag(%)

Cu(%)

Pb(%)

Zn(%)

Fe(%)

Pt(%)

Pd(%)

Ca(%)

Si(%)

98.75

0.2058

0.0013

0.1228

0.0005

0.0440

0.0005

0.0005

0.0029

0.0019

[0042] Table 2 Chemicals used in production

[0043]

[0044]

[0045] 2. Gold refining method

[0046] 1) Gold ingot pulverization: This process is completed by a hydraulic tilting intermediate frequency furnace and an imported high-pressure pulverization pump. The pulverization capacity is 30kg / batch, and...

Embodiment 2

[0064] 1. Production of raw materials and pharmaceuticals

[0065] The gold raw materials used in production are crude gold and gold mud from Zhaojin Group. The multi-element analysis of representative materials is now listed in Table 1. The chemicals used in the production process are all industrial products. The main chemicals used are listed in Table 7 below. Show.

[0066] Table 7 Multi-element analysis of gold ingot raw materials

[0067] Au(%)

Ag(%)

Cu(%)

Pb(%)

Zn(%)

Fe(%)

Pt(%)

Pd(%)

Ca(%)

Si(%)

99.50

0.2100

0.0101

0.014

0.0005

0.0005

0.0005

0.0005

0.0005

0.0052

[0068] 2. Gold refining method

[0069] 1) Gold ingot pulverization: This process is completed by a hydraulic tilting intermediate frequency furnace and an imported high-pressure pulverization pump. The pulverization capacity is 30kg / batch, and the time is 0.5h. mm accounted for more than 95%.

[0070] 2) Pre-soa...

Embodiment 3

[0086] 1. Production of raw materials and pharmaceuticals

[0087] The gold raw materials used in production are crude gold and gold mud from Zhaojin Group. The multi-element analysis of representative materials is now listed in Table 1. The chemicals used in the production process are all industrial products. The main chemicals used are listed in Table 12 below. Show.

[0088] Table 12 Multi-element analysis of crude gold raw materials and gold mud

[0089] Au(%)

Ag(%)

Cu(%)

Pb(%)

Zn(%)

Fe(%)

Pt(%)

Pd(%)

Ca(%)

Si(%)

90.05

4.550

0.1421

0.0232

0.0005

0.0229

0.0008

0.0005

0.0005

0.0012

[0090] 2. Gold refining method

[0091] 1) Gold ingot pulverization: This process is completed by a hydraulic tilting intermediate frequency furnace and an imported high-pressure pulverization pump. The pulverization capacity is 30kg / batch, and the time is 1.5h. mm accounted for more than 95%.

[009...

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Abstract

The invention relates to a technology of gold metallurgy, in particular to a refinement technology of high-purity gold, and belongs to the field of gold refinement. The refinement technology of the high-purity gold, which is disclosed by the invention, comprises the following steps: (1) pulverizing gold ingots; (2) performing preimpregnation and impurity removal; (3) performing primary chlorination leaching of gold; (4) performing primary reduction; (5) performing secondary chlorination leaching of gold; (6) performing secondary reduction. The refinement technology of the high-purity gold, which is disclosed by the invention, solves the problems that equipment is seriously corroded and the environment is polluted during the whole production process of an aqueous-solution chlorination method, and realizes the scale production of products of which the gold content is raised from 99.99% to 99.999%.

Description

technical field [0001] The invention relates to a gold refining technology, in particular to a high-purity gold refining process, which belongs to the field of gold refining. Background technique [0002] At present, the purity of gold products such as gold jewelry, gold bars, gold and silver coins at home and abroad can only reach 99.99%, which is commonly known as 4 nines, while the new version of the national standard has a purity of 99.999% for high-purity gold, which is 5 nines. September 2011 On March 1, with the promulgation and implementation of the national standards "High Purity Gold" and "High Purity Gold Chemical Analysis Methods" approved by the General Administration of Quality Supervision, Inspection and Quarantine and the National Standardization Management Committee, the domestic gold consumption market ushered in new consumer products. [0003] The birth of high-purity gold stems from the industrial needs of the development of the aerospace industry, becaus...

Claims

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Application Information

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IPC IPC(8): C22B11/06C22B3/10
CPCY02P10/20
Inventor 张绵慧庄宇凯李尚远赵智波杨希荣冯桂坤徐永财
Owner SHANDONG ZHAOJIN GOLD & SILVER REFINERY
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