二氧化锗离心过滤工艺研究

Centrifugal Filtration Process of Germanium Dioxide

摘要:

采用离心分离工艺对GeCl4水解生成的二氧化锗进行过滤实验，分析了各工艺参数对GeO2直收率、GeO2滤饼含水量与含氯量的影响规律。通过研究得到最优工艺参数组合：离心机滤布孔径为2.6 μm，脱水转速为1200 r/min，滤饼厚度为80~100 mm，单次洗涤洗液量为20 L，洗涤循环次数为3~5次。结果表明：GeO2直收率可达到99.62%，制备的GeO2滤饼含水量小于8%，含氯量小于0.05%，此样品再经过干燥则可以达到国标规定的GeO2-06产品要求

Abstract:

Centrifugal separation process was used to filtrate germanium dioxide hydrolyzed from germanium tetrachloride, and the effects of different parameters on direct?recovery rate, moisture content and chlorine content in filter cake were analyzed. The following optimized processing parameters are obtained: centrifuge filter cloth aperture 2.6 mm, the dehydration speed 1200 r/min, the filter cake thickness 80~100 mm, the single washing lotion amount 20 L, and the washing water cycle 3~5 times. The results show that the direct recovery rate of germanium dioxide can reach 99.62%, the moisture content is less than 8%, and the chlorine content is less than 0.05% in the filter cake. These samples after drying again can meet the international standard of?GeO2-06