Waste liquid crystal display screen resource comprehensive recycling method
A liquid crystal display and liquid crystal display panel technology, which is used in the removal of solid waste, the improvement of process efficiency, and the photography process, etc. The effect of low workload, reduced material volume, and high degree of mechanization
Inactive Publication Date: 2020-04-28
四川长虹格润环保科技股份有限公司
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Problems solved by technology
In this method, suction cups are respectively arranged on the two outer surfaces of the clean waste liquid crystal display screen to separate the waste liquid crystal display screen, and the two panels of the liquid crystal screen are separated from each other. The problem is that the industrial demand for mass production cannot be realized
Method used
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Embodiment 1
[0054] A. Pass the waste liquid crystal screen to be dismantled through such as figure 2 In the three-roll bending machine shown, the surface of each roller is covered with a rubber layer with a thickness of 20.0mm. The speed of the two driving rollers is 5m / min. Bending external forces in different directions are applied to the two sides to form Make the tension of different deformations between the two panels bonded to each other, make the sealing glue of the bonded panels invalid, realize the separation of the two panels of the liquid crystal display, and obtain the liquid crystal display panel with the exposed liquid crystal surface, and the separation of the liquid crystal display panel The rate reaches 95%;
[0055] B. Pass the liquid crystal display panel with the exposed liquid crystal surface obtained in step A through the milling equipment conveyed by a belt, grind and polish off the liquid crystal layer and the ITO indium layer, and collect it under a negative pres...
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Abstract
The invention discloses a waste liquid crystal display screen resource comprehensive recycling method, and belongs to the technical field of resource regeneration. In order to realize efficient separating and recycling of metal indium, glass and polaroids in a waste liquid crystal display screen in an energy-saving and environment-friendly manner, the waste liquid crystal display screen resource comprehensive recycling method is provided. The method comprises the following steps that bending external force in different directions are applied to the two side surfaces of the waste liquid crystaldisplay screen to obtain a liquid crystal display panel with an exposed liquid crystal surface; the liquid crystal display panel with the exposed liquid crystal surface is ground through a grinding device to remove a liquid crystal layer and an ITO indium-plated layer, and negative pressure collecting is carried out to obtain a glass substrate containing liquid crystal indium-rich powder and to which the polaroids are attached; the glass substrate to which the polaroids are attached is subjected to crushing, vibrating screening and gravity separation to obtain the polaroids and glass particles; and the indium-rich powder is subjected to high-temperature pyrolysis, leaching, extraction, reverse extraction, replacement and electrolysis to obtain high-purity indium. According to the method,the recycling rate of the indium is greater than 93%, the purity is 4N, and the recycling rates of glass and polaroids are both greater than 95%.
Description
technical field [0001] The invention belongs to the technical field of resource regeneration, and in particular relates to a method for comprehensive recycling of waste liquid crystal display screen resources. Background technique [0002] At present, liquid crystal displays are widely used in fields such as liquid crystal displays, liquid crystal televisions, notebook computers, tablet computers, and mobile phones. The advantages of LCD screens are low power consumption, small size, and low radiation. In the next few years, as Chinese companies increase investment, LCD production capacity will continue to grow. It is estimated that by 2022, China's LCD market will reach 103.9 billion yuan. According to statistics, the total sales volume of liquid crystal displays in my country in 2011 exceeded 100 million units. Because the lifespan of liquid crystal display products is generally short, the lifespan of LCD TVs is 8 to 10 years, and the lifespan of liquid crystal displays, ...
Claims
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IPC IPC(8): B09B3/00B09B5/00C22B7/00C22B58/00C25C1/22
CPCB09B3/00B09B5/00C22B7/007C22B58/00C25C1/22Y02P10/20
Inventor 吴建峰魏可王鸿
Owner 四川长虹格润环保科技股份有限公司
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