Unlock instant, AI-driven research and patent intelligence for your innovation.

Recovery process of tin from indium concentrate

A concentrate and process technology, applied in the field of resource regeneration, can solve the problems of unrealistic industrialization, uneconomical production process, and low enrichment ratio of indium concentrate, so as to achieve no secondary pollution, low production cost, and small investment in equipment Effect

Inactive Publication Date: 2018-04-20
汪洋
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the recovery rate of indium using Qin Wenlong’s separation method is lower than 60%, and the enrichment ratio of indium concentrate is low. Due to the use of fire method volatilization and excessive energy consumption, the production process is uneconomical and cannot be industrialized.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] Raw materials for processing: liquid crystal indium-containing concentrate after physical enrichment of waste liquid crystal display screens.

[0016] The operation steps are as follows:

[0017] 1. Low-temperature drying: Dry the concentrate containing liquid crystal indium in an electric drying oven at low temperature to obtain a dried material with a water content of less than 2.5%.

[0018] 2. Ball milling: Dry the dried material with a ball mill, and sieve it through a 180-mesh screen to obtain liquid crystal indium-containing concentrate powder.

[0019] 3. Alkali roasting: mix liquid crystal indium concentrate powder with granular caustic soda, stir evenly, put it into a stainless steel tray, put it into a box-type resistance furnace, and carry out high-temperature roasting at a constant temperature of 800-850°C for 6 hours Conversion and decomposition, during which the glass is converted into sodium silicate, etc., tin oxide is converted into sodium stannate, a...

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 relates to a recovery process of tin from indium concentrate, and belongs to the technical field of resource regeneration, wherein the recovery process comprises drying, ball milling, roasting, water adding and leaching, solid-liquid separation, tin extraction, and other processes. According to the present invention, the method has advantages of high direct yield of indium tin, simple process operation, low equipment investment, low production cost, no secondary pollution and the like.

Description

technical field [0001] The invention belongs to the technical field of resource regeneration. Background technique [0002] Most of the current liquid crystal displays use epoxy resin to seal two glass substrates engraved with indium electrodes. After injecting liquid crystals, polarizers are pressed on the outside of the two glass substrates to form a complete liquid crystal display device. Therefore, the key to recycling and processing waste liquid crystal screens is how to effectively separate the polarizer, the glass substrate, and the ITO film used to engrave the indium electrode. [0003] There have been related reports on the recycling of waste liquid crystal display screens. For example, Qin Wenlong in Taiwan broke open the waste liquid crystal display panels and put them in a closed furnace for processing to separate the coating oxide and glass sheets. However, the recovery rate of indium using Qin Wenlong's separation method is lower than 60%, and the enrichment r...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/02C22B25/06
CPCC22B1/02C22B7/006C22B25/04C22B25/06Y02P10/20
Inventor 汪洋
Owner 汪洋