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Method for separating indium and tin from In-Sn alloy by vacuum distillation

A technology for indium-tin alloy and distillation separation, which is applied in the field of indium-tin alloy vacuum distillation separation of indium and tin, can solve the problems of high metal direct recovery rate and low energy consumption, and achieve high metal direct recovery rate, low energy consumption and environmental protection. friendly effect

Inactive Publication Date: 2010-03-03
KUNMING UNIV OF SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No reagents are added in the process, the direct metal recovery rate is high, the energy consumption is low, the form of indium tin does not change during the process, both indium and tin are in the state of metal, and there are no relevant reports at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Add 50g of indium-tin alloy composition: In: 90%, Sn: 10%, add it to a clay crucible with constant weight and put it into a vacuum furnace. After sealing the vacuum furnace, turn on the circulating cooling water and start the furnace Carry out vacuuming, and open the high vacuum valve to extract a high vacuum when the vacuum degree is less than 15Pa. After the vacuum degree is stable, heat up the vacuum furnace. Control the heating rate of 10°C / min to 800°C, keep at 800°C for 20 minutes, then raise the temperature to 1250°C at a heating rate of 15°C / min, and distill for 60 minutes. After the distillation is over, continue to circulate cooling water to continue cooling, and continue to turn on the vacuum pump to prevent air from entering the furnace to form an oxidizing atmosphere. After the furnace temperature is cooled to room temperature, the furnace is shut down, and the vacuum furnace is opened to collect volatiles and residues. 42.4 g of distillate indi...

Embodiment 2

[0019] Example 2: Add 36.86kg of indium-tin alloy (its main components are: In: 97.76%, Sn: 1.3%, others: 1%) produced in the indium refining process into a graphite crucible and put it into a vacuum furnace, and seal the vacuum furnace Finally, turn on the circulating cooling water, turn on the furnace to vacuumize, and heat up the vacuum furnace when the vacuum degree is 8-10 Pa and is stable. Control the heating rate of 12°C / min to 800°C, keep the temperature for 20 minutes, then increase the heating rate of 15°C / min to 1050°C, and distill for 120 minutes. After the distillation is over, continue to pass through the circulating cooling water to continue cooling. After the furnace cools down to room temperature, stop the land and open the vacuum furnace to collect volatiles and residues. Distillate 35.55 g and residue 0.88 g were obtained. After separation, the distillate composition: In 99.03%, Sn 0.38%; the residue composition: In 5.96%, Sn 67.56%; the residue is returne...

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Abstract

The invention relates to a method for separating indium and tin from In-Sn alloy by vacuum distillation. The method comprises the following steps: adding In-Sn alloy material which includes 40-99% ofIn and 1-60% of Sn into a vacuum furnace, controlling vacuum degree, temperature and distillation time in the furnace, and leading metal indium and tin to separate. The treated objects can be In-Sn alloy, In-Sn slag and the like generated during the non-ferrous smelting process. By vacuum distillation, the content of tin in metal indium is less than 0.5%, the content of indium in metal tin is lessthan 0.5%, and the total recovery efficiency of metal is more than 99%. During the process, any reagent does not need to be added, the technology is simple, the metal recovery efficiency is high, andthe electricity consumption is less than 10KW.h / kg.

Description

1. Technical field [0001] The invention relates to a method for separating indium and tin by vacuum distillation of an indium-tin alloy, which belongs to the technical field of vacuum metallurgy of nonferrous metals. 2. Technical Background [0002] The resources of indium are scarce, and there are almost no ore bodies with independent industrial mining value in nature, and most of them are associated with non-ferrous metal sulfide minerals. It has been found that about 50 kinds of minerals contain indium. Such as zinc sulfide ore, sphalerite, galena, lead oxide ore, tin ore, copper sulfide ore, antimony sulfide ore, etc. The production of metal indium is mainly recovered in the smelting process of non-ferrous metals and secondary resources of indium. [0003] The known patents related to indium-tin alloy mainly include: patent document CN1191380C discloses a method for extracting refined indium from indium-tin alloy waste, using indium-tin oxide waste and other indium-con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/02C22B25/08C22B58/00
CPCY02P10/20
Inventor 杨斌邓勇杨美彦戴卫平刘大春张少广刘永成徐宝强闫磊张国华
Owner KUNMING UNIV OF SCI & TECH
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