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Waste liquid crystal display panel treatment and resource recycling method

A technology of liquid crystal display panels and recycling methods, applied in the direction of solid waste removal, etc., can solve the problems of long processing time, secondary pollution, and low efficiency, and achieve the effects of clean processing, high resource utilization rate, and simple operation

Inactive Publication Date: 2012-09-19
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple and easy to operate, but it uses a large amount of organic solvent and mixed acid, which is easy to cause secondary pollution, and the treatment time is long, the efficiency is not high, and it is not suitable for large-scale treatment

Method used

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  • Waste liquid crystal display panel treatment and resource recycling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] First, send the disassembled waste liquid crystal display panel into the vacuum pyrolysis furnace. After the vacuum furnace is sealed, start the vacuum pump to pump air, so that the vacuum degree of the vacuum pyrolysis furnace reaches 1Pa, and the temperature of the condensation part of the vacuum pyrolysis furnace is controlled at 0-50 °C, start the vacuum pyrolysis furnace heater, make the temperature of the heating part reach 550 °C, and carry out pyrolysis for 60 minutes, so that the organic components on the waste liquid crystal display surface are rapidly pyrolyzed and gasified, extracted and condensed and collected. 75.2% pyrolysis oil, 10.7% pyrolysis gas and 14.1% pyrolysis residue were obtained. Afterwards, the remaining indium-containing glass was taken out and crushed to less than 1.00mm, and after the crushing, 50wt% ammonium chloride was added and mixed thoroughly. Heating the raw material reactor of the decompression chlorination and extracting indium eq...

Embodiment 2

[0047] First, send the disassembled waste liquid crystal display panel into the vacuum pyrolysis furnace. After the vacuum furnace is sealed, start the vacuum pump to pump air, so that the vacuum degree of the vacuum pyrolysis furnace reaches 50Pa, and the temperature of the condensation part of the vacuum pyrolysis furnace is controlled at 0-50 °C, start the vacuum pyrolysis furnace heater, make the temperature of the heating part reach 600 °C, and carry out pyrolysis for 100 minutes, so that the organic components on the waste liquid crystal display surface are quickly pyrolyzed and gasified, extracted and condensed and collected. 71.9% of pyrolysis oil, 13.2% of pyrolysis gas and 14.9% of pyrolysis residue were obtained. Afterwards, the remaining indium-containing glass was taken out and crushed to less than 1.00mm, and after the crushing, 60wt% ammonium chloride was added and mixed thoroughly. Heating the raw material reactor of the decompression chlorination and extractin...

Embodiment 3

[0049] First, send the disassembled waste liquid crystal display panel into the vacuum pyrolysis furnace. After the vacuum furnace is sealed, start the vacuum pump to pump air, so that the vacuum degree of the vacuum pyrolysis furnace reaches 100Pa, and the temperature of the condensation part of the vacuum pyrolysis furnace is controlled at 0-50 °C, start the vacuum pyrolysis furnace heater, make the temperature of the heating part reach 700 °C, and carry out pyrolysis for 120 minutes, so that the organic components on the waste liquid crystal display surface are quickly pyrolyzed and gasified, extracted and collected by condensation. 70.1% of pyrolysis oil, 13.26% of pyrolysis gas and 16.64% of pyrolysis residue were obtained. Afterwards, the remaining indium-containing glass was taken out and crushed to less than 1.00mm, and after crushing, 70wt% ammonium chloride was added and mixed thoroughly. Heating the raw material reactor of the decompression chlorination and extracti...

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Abstract

A waste liquid crystal display panel treatment and resource recycling method includes recycling organic ingredients of waste liquid crystal display panels in a vacuum pyrolysis furnace in a vacuum pyrolysis manner at first so as to obtain pyrolysis oil, pyrolysis gas and glass plates containing vacuum pyrolysis residues; then crushing the glass plates into particles with the sizes smaller than 1.00mm; and adding ammonium chloride accounting for 50% of glass powder by weight at least, reducing pressure, chloridizing and extracting indium so as to obtain indium chloride with the purity higher than 99%. Indium recycling rate is higher than 90%. The waste liquid crystal display panel treatment and resource recycling method has the advantages of high efficiency, zero pollution, high resource recycling rate, simplicity in operation and the like, and is suitable for large-scale industrial application in environment-friendly and resource recycling type enterprises, a treatment process is clean, any toxic and harmful substances are not discharged to environments, and organic matters, rare metal indium and glass in the waste liquid crystal display panels are almost recycled completely.

Description

technical field [0001] The invention relates to the technical field of recycling waste liquid crystal display panels, in particular to a treatment and recycling method of waste liquid crystal display panels containing indium tin oxide and liquid crystal polymer components. Background technique [0002] The development of electronic information technology in the 21st century is changing with each passing day, and the human-computer interaction equipment of electronic products is also constantly improving. Display is an important part of electronic products. As the main window for electronic products to output information to users, it has always been the focus of research. In recent years, it has developed from a large-volume, high-radiation, high-power consumption cathode tube display to an energy-saving, low-radiation, ultra-thin LCD display, and even a touchable LCD display. At present, LCD monitors, LCD TVs, notebook computers, tablet computers and mobile phones are the m...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00
Inventor 许振明马恩卢日鑫
Owner SHANGHAI JIAO TONG UNIV
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