废弃LCD面板低温破碎技术研究
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摘要
为了高效、绿色回收废弃LCD面板中高价值的液晶成分和稀贵金属铟,需要先将LCD面板进行低温破碎,且控制温度在65℃以下,以保证液晶材料不会改性。为此,基于自行研制的LCD面板专用破碎机,研究了LCD面板破碎时温度场的分布情况与破碎工艺参数之间的关系,提出了一种简单高效、成本低、性能可靠的LCD面板低温破碎技术;确定了低温冷却方式,选择了廉价易得的冷却介质,设定了合理的冷却温度和冷却时间。试验结果表明,将LCD面板采用低温冷却、常温破碎的方法是经济可靠的,有效避免了液晶在破碎过程中因高温而改性的问题,而且可以降低成本。该技术成功用在LCD面板的破碎机上,为废弃液晶显示器的产业化回收奠定了基础,符合可持续发展的要求。
In order to realize high efficiency and green recovery of high value liquid crystal and rare metal indium in waste LCD panels,the liquid crystal display panels need to be broken firstly at low temperature below 65 ℃ to ensure the liquid crystal material will not change its properties. Therefore,based on self-developed special crusher for LCD panels,the relationships between the temperature field distribution and the broken process parameters of the LCD panels were studied. A simple,efficient,low cost and reliable low temperature crushing technology was proposed for wasted LCD panels. The low temperature cooling method was determined,the cheap and easy cooling medium was selected and the reasonable cooling temperature and cooling time were set. The test results show that the method of low temperature cooling and normal temperature crushing is economical and reliable for wasted LCD panels. The problems can be avoided effectively that the liquid crystal will change its chemical properties under high temperature during crushing process,and the cost can also be saved. The technology is used in the crusher of LCD panels successfully,which lays the foundation for the industrial recovery of wasted liquid crystal displays and meets the requirements of sustainable development.
In order to realize high efficiency and green recovery of high value liquid crystal and rare metal indium in waste LCD panels,the liquid crystal display panels need to be broken firstly at low temperature below 65 ℃ to ensure the liquid crystal material will not change its properties. Therefore,based on self-developed special crusher for LCD panels,the relationships between the temperature field distribution and the broken process parameters of the LCD panels were studied. A simple,efficient,low cost and reliable low temperature crushing technology was proposed for wasted LCD panels. The low temperature cooling method was determined,the cheap and easy cooling medium was selected and the reasonable cooling temperature and cooling time were set. The test results show that the method of low temperature cooling and normal temperature crushing is economical and reliable for wasted LCD panels. The problems can be avoided effectively that the liquid crystal will change its chemical properties under high temperature during crushing process,and the cost can also be saved. The technology is used in the crusher of LCD panels successfully,which lays the foundation for the industrial recovery of wasted liquid crystal displays and meets the requirements of sustainable development.
引文
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[12]宋涛,刘莹.矿车盘式制动器温度场的数值模拟[J].现代制造工程,2014(4):63-67.
[13] MICHAEL Wilczek,JURGEN Bertling,DAMIAN Hintemann. Optimised technologies for cryogenic grinding[J].International Journal of Mineral Processing,2004(74):425-434.
[14]陈文卿,马元,彭学院,等.制冷压缩机基础理论研究与关键技术开发[J].制冷学报,2010,31(4):14-21.
[2]谢松廷,吕国强,杨军.液晶显示屏的热特性模拟及其热仿真软件的设计与开发[J].液晶与显示,2008,23(3):382-386.
[3]谷长春. PNLCD显示屏热力学特性研究[D].成都:电子科技大学,2009.
[4]黄庆,王景伟,张承龙,等.应用选择性破碎技术处理废弃硒鼓的可行性研究[J].环境工程,2017,35(1):129-132.
[5]王玉琳,李明会,陈子涵.废弃液晶面板剪切破碎机:201710686373. 2[P]. 2017-08-11.
[6]李必文.机械设计分析中的曲线拟合[J].现代制造工程,2008(5):72-74.
[7]王建华,任立军,贺泽军.破碎机齿冠内温度及热应力分布研究[J].矿业研究与开发,2003,23(6):50-51.
[8]刘海燕. TFT-LCD用玻璃基板的性能及检测[J].玻璃,2009,36(1):22-24.
[9]相黎阳,迟宏宵,马党参,等.大截面4Cr13V耐蚀塑料模具钢的组织和性能[J].钢铁,2015,50(7):92-99.
[10] LEE Y B,BAILEY C,LU H,et al. Thermo-Mechanical Analysis of the Packaging Process for Micro-Electronic Displays. International Conference on Thermal,Mechanical and Multiphysics Simulation and Experiments in Micro-Electronics and Micro-Systems,2006[C]. Eurosime:IEEE,2006.
[11]叶圣麟.液晶显示玻璃基板激光切割热应力场的有限元仿真[J].应用激光,2006,26(4):267-271.
[12]宋涛,刘莹.矿车盘式制动器温度场的数值模拟[J].现代制造工程,2014(4):63-67.
[13] MICHAEL Wilczek,JURGEN Bertling,DAMIAN Hintemann. Optimised technologies for cryogenic grinding[J].International Journal of Mineral Processing,2004(74):425-434.
[14]陈文卿,马元,彭学院,等.制冷压缩机基础理论研究与关键技术开发[J].制冷学报,2010,31(4):14-21.