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A kind of method of gold-tin alloy separation

A technology of tin alloy and alloy, applied in the field of gold-tin alloy separation, can solve problems such as long process

Active Publication Date: 2019-03-15
KUNMING DIBOO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to add a variety of reagents to extract gold, and the process is long

Method used

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  • A kind of method of gold-tin alloy separation
  • A kind of method of gold-tin alloy separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Sulfur is added according to 1.2 times the mole fraction of the vulcanizing agent required for the non-sulfurized tin in the gold-tin alloy (mass percentage: Sn98.22%, Au1.49%, others <0.3%) to change to the vulcanized state.

[0025] Mix the gold-tin alloy and sulfur evenly, put it into an airtight container and seal it, and heat it up for vulcanization under the condition of anaerobic and stirring. Firstly, the temperature is controlled at 200°C to 250°C, and the reaction is carried out for 60 minutes. Then maintain anaerobic and stirring conditions, and raise the temperature to 380 ° C ~ 400 ° C, so that the material and vulcanizing agent undergo a deep vulcanization reaction. After the reaction is over, stop heating, and take out the sulfurized product after the material is cooled.

[0026] After vulcanization, the material was vacuum distilled for 90 minutes at a temperature of 1400° C. and a vacuum degree of 5 to 50 Pa to obtain volatiles and residues. The detec...

Embodiment 2

[0028] Sulfur is added according to 1.1 times the mole fraction of the vulcanizing agent required for the non-sulfurized tin in the gold-tin alloy (mass percentage: Sn89.66%, Au10.32%) to change into a sulfide state.

[0029] Mix the gold-tin alloy and sulfur evenly, put it into an airtight container and seal it, and heat it up for vulcanization under the condition of anaerobic and stirring. Firstly, the temperature is controlled at 230° C. to 280° C., and the reaction is carried out for 30 minutes. Then maintain anaerobic and stirring conditions, and raise the temperature to 350 ° C ~ 400 ° C, so that the material and vulcanizing agent undergo a deep vulcanization reaction. After the reaction is over, stop heating, and take out the sulfurized product after the material is cooled.

[0030] After vulcanization, the material was vacuum distilled for 60 minutes at a temperature of 1100° C. and a vacuum degree of 1 to 20 Pa to obtain volatiles and residues. The detected volatile...

Embodiment 3

[0032] Sulfur is added according to 1.15 times the mole fraction of the vulcanizing agent required for the non-sulfurized tin in the gold-tin alloy (mass percentage: Sn57.66%, Au42.32%) to change into a sulfide state.

[0033] Mix the gold-tin alloy and sulfur evenly, put it into an airtight container and seal it, and heat it up for vulcanization under the condition of anaerobic and stirring. Firstly, the temperature is controlled at 250° C. to 300° C., and the reaction is carried out for 30 minutes. Then maintain anaerobic and stirring conditions, and raise the temperature to 450 ° C ~ 500 ° C, so that the material and vulcanizing agent undergo a deep vulcanization reaction. After the reaction is over, stop heating, and take out the sulfurized product after the material is cooled.

[0034] After vulcanization, the material was vacuum distilled for 60 minutes at a temperature of 1300° C. and a vacuum degree of 30-100 Pa to obtain volatiles and residues. The detected volatile...

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Abstract

The invention relates to a gold-tin alloy separation method and belongs to the technical field of nonferrous metal pyrometallurgy. The gold-tin alloy separation method comprises the following steps that gold-tin alloy and a vulcanizing agent are uniformly mixed, a mixture is placed in a sealed vessel to be sealed, vulcanizing reaction is performed under the oxygen-free stirring environment, and tin in the gold-tin alloy is vulcanized to become stannous sulfide; and vacuum distillation is performed on a material after vulcanization under a certain condition to enable the stannous sulfide to volatilize, and thus separation of gold and tin is realized. By adopting the gold-tin alloy separation method, the process flow is short, and the gold-tin alloy can be separated by two process steps of vulcanization and vacuum distillation.

Description

technical field [0001] The invention relates to a method for separating gold-tin alloys, belonging to the technical field of nonferrous metal pyrometallurgy. Background technique [0002] Gold-tin alloys with different composition ratios have high thermal conductivity, low vapor pressure, excellent corrosion resistance, good wettability and fluidity, and are used for brazing of gold-plated or gold-plated alloy lead frames and leads. Gold-tin alloy solder has the characteristics of moderate brazing temperature, high strength, no flux, good wettability, low viscosity, and thermal fatigue resistance. It is widely used in microelectronics such as high-power LEDs, electric vehicles, and lasers. field, as well as the field of optical communication and optoelectronic devices. Gold-tin alloy waste will be produced during the production, processing and use of gold-tin alloys, and gold-tin alloys containing impurities will also be produced during the comprehensive recovery process of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B25/06C22B11/02
CPCY02P10/20
Inventor 戴卫平陈巍韩龙汤文通李红速斌简爱华杨堃李建国杨寿云李敏
Owner KUNMING DIBOO TECH
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