摘要
通过对TFT-LCD面板减薄废液成分进行分析,提出了减薄液资源化、循环利用的途径,并对资源化利用技术进行了探讨。利用复合沉淀剂,采用分步沉淀的方法,选择性去除液晶面板减薄废液中的氟硅酸(H_2SiF_6)和氟硼酸(HBF_4),使其再生并回用于液晶面板减薄工厂,副产的Na_2SiF_6可以用作制备NaF,KF及白炭黑的原料,KBF_4可直接用于市场销售。
Based on the analysis of the compositions of TFT-LCD panel thinning liquid waste, the ways of resource recovery and recycling of the liquid waste are put forward, and the technology of resource utilization is discussed. With compound precipitant, the fluosilicic acid(H_2SiF_6) and fluoboric acid(HBF_4) in the waste liquid can be removed selectively by using the method of fractional precipitation, and the regenerated thinning liquid can be reused for thinning the TFT-LCD panel. The by-product Na_2SiF_6 can be used as raw material for the preparation of Na F, KF and white carbon, and KBF_4 can be sold directly.
引文
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