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Method for efficiently purifying gold from alloyed gold

A high-efficiency technology for alloyed gold, which is applied in the field of high-efficiency gold purification for alloyed gold, can solve the problems of high investment cost of pulverization equipment, difficulty in cleaning materials, and long production cycle, achieving low processing costs, simple reagents, and short production cycle Effect

Pending Publication Date: 2022-06-28
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the more advanced processes for gold extraction in China are chlorination dissolution-reduction process, electrolytic refining process, and extraction and refining process. Both electrolytic refining process and extraction and refining process have problems such as long production cycle and backlog of funds. At present, some domestic enterprises use alloy gold Chlorination and dissolution process, but the alloy gold needs to be pulverized, the investment cost of powder equipment is high, and there are problems such as difficulty in cleaning materials inside the equipment after use, and the powdery alloy gold also has incomplete dissolution, Dissolving time is long and other problems, for this reason, it is extremely important to develop a method for efficiently purifying gold from alloyed gold

Method used

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  • Method for efficiently purifying gold from alloyed gold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Quenching the bulk alloyed gold water into gold particles with a particle size of 1mm, configure aqua regia in the titanium reaction kettle, start stirring at 50r / min, slowly add the alloyed gold particles, and add the alloyed gold particles at a speed of 6kg / min, and all the alloyed gold particles are added. Then, the stirring speed was adjusted to 100r / min, the reaction temperature was 75°C, the alloyed gold particles were all added and the reaction was completed for 20min, and the dissolution was completed; the aqua regia solution was boiled and concentrated to the original 1 / 2 volume, and 20% of the solution was added in three times. The urea solution, the volume ratio of the added amount of the urea solution to the aqua regia solution is 1:150, until there is no yellow smoke in the kettle, the nitrification is finished, filtered, and the gold-containing liquid and insoluble slag are produced, and the insoluble slag continues to return to the aqua regia solution. Dis...

Embodiment 2

[0018] Quenching the bulk alloyed gold water into gold particles with a particle size of 1.5mm, configure aqua regia in the titanium reaction kettle, start stirring at 60r / min, slowly add the alloyed gold particles at a speed of 7kg / min, and add all the alloyed gold particles. After finishing, the rotating speed was adjusted to 110r / min, the reaction temperature was 80°C, the alloyed gold particles were all added and the reaction was completed for 23min, and the dissolution was completed; the aqua regia solution was boiled and concentrated to the original 1 / 2 volume, and 22% of the solution was added in three times. Urea solution, the volume ratio of the added amount of the urea solution to the aqua regia solution is 1:120, until there is no yellow smoke in the kettle, the nitrification is finished, filtered, and the gold-containing liquid and insoluble slag are produced, and the insoluble slag continues to return to aqua regia Dissolve; add hydrazine hydrate to the gold-contai...

Embodiment 3

[0020] Quenching the bulk alloyed gold water into gold particles with a particle size of 1.5mm, configure aqua regia in the titanium reaction kettle, start stirring at 80r / min, slowly add the alloyed gold particles, and add the alloyed gold particles at a speed of 8kg / min, and add all the alloyed gold particles. After finishing, the rotating speed was adjusted to 120r / min, the reaction temperature was 85°C, the alloyed gold particles were all added and the reaction was completed for 25min, and the dissolution was completed; the aqua regia solution was boiled and concentrated to the original 1 / 2 volume, and 25% of the solution was added in three times. Urea solution, the volume ratio of the added amount of urea solution to the aqua regia solution is 1:100, until there is no yellow smoke in the kettle, the nitrification is finished, filtered to produce gold-containing liquid and insoluble slag, and the insoluble slag continues to return to aqua regia Dissolve; add hydrazine hydra...

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Abstract

The invention provides a method for efficiently purifying gold from alloyed gold. The method comprises the steps that blocky alloyed gold is subjected to water quenching to form small gold particles, the alloyed gold particles are subjected to aqua regia dissolution-saltpeter removal, after saltpeter removal, gold powder is produced through hydrazine hydrate reduction, and the gold powder is subjected to ingot casting to produce gold ingots. The high-quality gold is short in production period, rapid in development, high in yield, stable in gold powder quality and low in processing cost; the speed of the whole aqua regia dissolution process is high and does not exceed 40 min, and the dissolution rate of the alloyed gold particles reaches 99% or above; the gold-containing solution is reduced by hydrazine hydrate, the reduction rate reaches 99% or above, and the yield of produced gold powder reaches 100%.

Description

technical field [0001] The invention relates to a method for efficiently purifying gold from alloyed gold, belonging to the field of non-ferrous metal hydrometallurgy. Background technique [0002] At present, the more advanced processes for gold extraction in China are chlorination dissolution-reduction process, electrolytic refining process, and extraction refining process. Both electrolytic refining process and extraction refining process have problems such as long production cycle and backlog of funds. The chlorination dissolution process requires powdering of the alloyed gold, the investment cost of the pulverizing equipment is high, and there are problems such as difficulty in cleaning the materials inside the equipment after use. For this reason, it is extremely important to develop a method for high-efficiency purification of gold from alloyed gold. SUMMARY OF THE INVENTION [0003] Aiming at the deficiencies of the above-mentioned prior art, the present invention...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22D7/00C22B11/02
CPCB22F9/24B22D7/005C22B11/02
Inventor 邢晓钟杜彦君张燕徐鹏王程阁洪渊陈治毓赵彦才冯岩
Owner JINCHUAN GROUP LIMITED
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