Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method of separating indium from tin slag

A technology of tin slag and alkaline solution, applied in the direction of improving process efficiency, etc., can solve the problem of incomplete separation, and achieve the effect of complete separation, low cost and simple operation method

Inactive Publication Date: 2015-06-03
广西德邦科技有限公司
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production of ITO targets mainly uses sputtering coating technology, but the target utilization rate is usually about 60%, and the rest are waste targets. Since the ITO target is an oxide sintered body composed of In2O3 and SnO2, the waste target It is the most important indium renewable resource. The quantity and cost of recycling indium from waste targets are also an important factor that restricts indium transactions and indium prices. To effectively recycle indium in its waste materials, it is necessary to separate indium from tin. Among the existing separation methods One is to dissolve the waste target with acid, and then replace the tin in the solution with an indium plate, but because the solution contains more impurities, the replaced tin compound is a colloidal precipitate, which still contains more indium , the separation is not complete

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of separating indium from tin slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Such as figure 1 As shown, the present invention separates the method for indium from tin slag, and the steps of this method are as follows: the tin slag is rinsed with water, and the tin that becomes metal element is washed out, and the cleaning solution after rinsing is added NaOH alkali solution, and the pH value is adjusted to 2 , the tin in the solution reacts with NaOH to form and , standing will and Precipitation is precipitated, and the filtered filtrate is added with a 31% hydrochloric acid solution to adjust the pH value to 1.5. The remaining tin is replaced with an indium plate, and finally the indium in the solution is replaced with an aluminum plate. The invention can effectively separate the indium from the substituted tin colloidal precipitate, the operation method is simple, the cost is low, the indium is completely separated, and the recovery rate of the indium reaches 97% through the separation.

Embodiment 2

[0012] Such as figure 1 As shown, the present invention separates the method for indium from tin slag, and the steps of this method are as follows: the tin slag is rinsed with water, and the tin that becomes metal element is washed out, and the cleaning solution after rinsing is added NaOH alkali solution, and the pH value is adjusted to 2.5 , the tin in the solution reacts with NaOH to form and , standing will and Precipitation is precipitated, and the filtered filtrate is added with a 31% hydrochloric acid solution to adjust the pH value to 1. The remaining tin is replaced with an indium plate, and finally the indium in the solution is replaced with an aluminum plate. The recovery rate of indium of the present invention reaches 98%.

Embodiment 3

[0014] Such as figure 1 As shown, the present invention separates the method for indium from tin slag, and the steps of this method are as follows: the tin slag is rinsed with water, and the tin that becomes metal element is washed out, and the cleaning solution after rinsing is added NaOH alkali solution, and the pH value is adjusted to 3 , the tin in the solution reacts with NaOH to form and , standing will and Precipitation is precipitated, and the filtered filtrate is added with a 31% hydrochloric acid solution to adjust the pH value to 1.5. The remaining tin is replaced with an indium plate, and finally the indium in the solution is replaced with an aluminum plate. The recovery rate of indium of the present invention reaches 97%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method of separating indium from tin slag. The method is characterized by comprising the following steps: rinsing the tin slag with water, adding an alkaline solution into the rinsed cleaning fluid to regulate a pH value to be 2-3, standing, precipitating, adding an acid solution into the filtered filtrate to regulate a pH value to be 1-1.5, then replacing tin by an indium plate, and finally, replacing indium in the solution by an aluminum plate. The method is capable of completely separating indium and tin and is beneficial to recovering indium.

Description

technical field [0001] The invention relates to the technical field of separation of indium, in particular to a method for separating indium from tin slag. Background technique [0002] Indium is a rare metal widely used in electronic semiconductors, solders and alloys, ITO targets, atomic energy industry and other fields, among which ITO targets are its main application field, accounting for 70% of the global indium consumption. The production of ITO targets mainly uses sputtering coating technology, but the target utilization rate is usually about 60%, and the rest are waste targets. Since the ITO target is an oxide sintered body composed of In2O3 and SnO2, the waste target It is the most important indium renewable resource. The quantity and cost of recycling indium from waste targets are also an important factor that restricts indium transactions and indium prices. In order to effectively recycle indium in waste materials, it is necessary to separate indium from tin. Amon...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22B7/00C22B58/00
CPCY02P10/20
Inventor 洪涛梁义梁勉罗桂军黄旻万水明林勇梁超梁励谢春旭何峰
Owner 广西德邦科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com