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A kind of method for separation and purification of gold, silver and copper alloy

A copper alloy, gold and silver technology, applied in the field of separation and purification of gold, silver and copper alloys, can solve the problems of no gold, silver and copper alloy treatment, complex operation, and high consumption of pharmaceutical reagents

Active Publication Date: 2022-05-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, some patents and articles on recycling valuable metals do not continue to process the gold, silver and copper alloys produced in the process
[0007] The methods for separation and purification of the above-mentioned gold, silver and copper alloys are all chemical and wet separation and purification. The consumption of pharmaceutical reagents is high, and waste acid and waste liquid will inevitably be produced, and the steps are lengthy and the operation is complicated.

Method used

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  • A kind of method for separation and purification of gold, silver and copper alloy
  • A kind of method for separation and purification of gold, silver and copper alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Technical approach one

[0028] combined with figure 1 , in the first step, put the crucible containing 100g of gold-silver-copper alloy (Au 24.24%, Ag 45.78%, Cu29.29%) into the vacuum furnace, then add two fractionation trays and a confluence tray on the crucible, and close the vacuum furnace , turn on the cooling water circulation system switch, turn on the vacuum pump, set the heating program 10℃ / min, start heating when the pressure in the furnace is 0.01Pa, keep the temperature for 180min when the temperature rises to 1100℃, the pressure during the heat preservation period is 0.01Pa, after the heat preservation is over Turn off the heating power, keep the vacuum pump running, turn off the vacuum pump when the temperature in the furnace drops below 100°C, and open the vent valve to obtain the gold-silver-copper alloy. Gold-copper alloy (Au 55.13%, Cu44.69%);

[0029] The second step is to use the gold-copper alloy (Au 55.13%, Cu 44.69%) of the residue o...

Embodiment 2

[0030] Example 2: Technical approach one

[0031] combined with figure 1, in the first step, put the crucible containing 100g of gold-silver-copper alloy (Au 24.24%, Ag 45.78%, Cu29.29%) into the vacuum furnace, then add two fractionation trays and a confluence tray on the crucible, and close the vacuum furnace , turn on the cooling water circulation system switch, turn on the vacuum pump, set the heating program 13℃ / min, start heating when the pressure in the furnace is 1Pa, keep warm for 120min when the temperature rises to 1200℃, the pressure during the heat preservation period is 1Pa, turn off the heating after the heat preservation is over The power supply and the vacuum pump continue to run. When the temperature in the furnace drops below 100 °C, the vacuum pump is turned off, and the vent valve is opened to obtain the gold-silver-copper alloy. Alloy (Au 56.48%, Cu43.29%);

[0032] The second step is to use the gold-copper alloy (Au 56.48%, Cu 43.29%) as the raw materi...

Embodiment 3

[0033] Example 3: Technical approach one

[0034] combined with figure 1 , in the first step, put the crucible containing 100g of gold-silver-copper alloy (Au 24.24%, Ag 45.78%, Cu29.29%) into the vacuum furnace, then add two fractionation trays and a confluence tray on the crucible, and close the vacuum furnace , turn on the cooling water circulation system switch, turn on the vacuum pump, set the heating program 15℃ / min, start heating when the pressure in the furnace is 10Pa, keep warm for 180min when the temperature rises to 1300℃, the pressure during the heat preservation period is 10Pa, turn off the heating after the heat preservation is over The power supply and the vacuum pump continue to run. When the temperature in the furnace drops below 100 °C, the vacuum pump is turned off, and the vent valve is opened to obtain the gold-silver-copper alloy. Alloy (Au 54.94%, Cu44.76%);

[0035] The second step is to use the gold-copper alloy (Au 54.94%, Cu 44.76%) as the raw mat...

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Abstract

The invention discloses a method for separating and purifying gold-silver-copper alloy, which belongs to the field of pyrometallurgical purification of non-ferrous metals. The method can be realized in two ways. The first way is a principle step: the first step is to place the gold-silver-copper alloy in a vacuum furnace. Under the condition of pressure of 0.01~100Pa, vacuum gasification and separation to obtain gold-silver-copper alloy. The first step is to separate the volatiles crude silver and the residual gold-copper alloy by vacuum gasification. Carry out the second vacuum aeration separation for the raw material, control the heating rate to be 10-15°C / min, the temperature to be 1300-1700°C, the holding time to be 30-180min, and the pressure in the furnace to be 0.01-100Pa to obtain the second step of vacuum aeration and separation of volatiles Crude copper and residue crude gold. Method 2 Principle steps: place the raw gold-silver-copper alloy in a vacuum furnace, and conduct vacuum gasification separation under the conditions of a heating rate of 10 to 15 °C / min, a temperature of 1300 to 1700 °C, a holding time of 30 to 180 min, and a furnace pressure of 0.01 to 100 Pa. , the residue crude gold is obtained in the crucible, and the crude copper and crude silver are obtained respectively in different condensation areas. The invention has short technological process, no chemical reagent consumption, no waste water and waste gas generation, and is green and efficient.

Description

technical field [0001] The invention belongs to the field of nonferrous metal pyrometallurgy and separation and purification, in particular to a method for separation and purification of gold-silver-copper alloy. Background technique [0002] Gold and silver are metals discovered and utilized by humans earlier. Gold is the metal with the best corrosion resistance and stability. It has good electrical and thermal conductivity and is widely used in electronics, communications, aerospace, chemical, medical and other fields. Silver is the metal with the best electrical conductivity, thermal conductivity and reflectivity. It also has good chemical stability and mechanical properties. It is widely used in photosensitive materials, decorative materials, handicrafts, electrical contact materials, composite materials, alloy solders, silver paste, Energy industry, catalysts, medical drugs, antibacterial materials. [0003] According to the form of gold, gold ore can be divided into ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B9/02C22B9/04C22B11/02C22B15/00
CPCC22B9/02C22B9/04C22B11/02C22B15/0028Y02P10/20
Inventor 徐宝强王双平杨斌蒋文龙田阳孔令鑫熊恒杨佳李一夫刘大春王飞曲涛孔祥峰戴永年
Owner KUNMING UNIV OF SCI & TECH