Technical Parameter Research of High Purity Green SiC from Cutting Waste Mortar of Solar Silicon Wafer

摘要：

The green SiC (silicon carbide) powder, cutting fluid and pure Si (silicon) has the great recovery value in cutting waste mortar of solar silicon wafer. Nowadays, the critical technology of recycling SiC powder is classification technology in which the quality of recovery SiC powder is depended on classification precision. The self developed turbine air classifier (LNC-120A-2 type with two air classifier connected) was used in this experiment. The test dust is dry admixture of waste mortar containing SiC (JIS1200 ＃ ) through pretreatment. Through the orthogonal experiment, the optimum classification condition: the speed of first stage classifier is 1914rpm, the speed of second stage classifier is 3480rpm , the secondary air flow of second stage classifier is 13m3/h, the disperse pressure is 0.2MPa and the total system air volume is 1400m /h. Under this condition, the classification precision of SiC powder is 85.73％, the particle size d50 is 9.571μm meeting the demand of JIS1200#, the recovery efficiency is 89.2％ and yield is 65Kg/h. Sometimes, the results show: the granule morphology of recovery SiC powder is basically some with standard SiC powder of JIS1200#, meeting the effective cutting for silicon wafer.

关键词： air classifier solar silicon wafer waste mortar recovery SiC

作者: Zhang Mingxing Chen Haiyan Yan Cuiping

作者单位: The Key Laboratory of Solid WasteTreatment and Reclamation,Ministry Education,Institute of Environment and Resource ,Southwest University of Science and Technology,Mianyang,Sichuan,621010,China

会议类型: 国际会议

会议名称: 2010 International Conference on Material and Manufacturing Technology(2010材料与制造技术国际会议 ICMMT2010)

会议地点: 重庆

会议语种:英文

页码: 1043-1048

在线出版日期: 2010-09-17（万方平台首次上网日期，不代表论文的发表时间）