化工进展2018，Vol.37Issue(3)：837-844,8.DOI:10.16085/j.issn.1000-6613.2017-1042
光伏材料切割废液中的Si和SiC旋流分离过程
Swirl separation process of Si and SiC in cutting waste of photovoltaic materials
摘要
Abstract
The separation and recovery of Si and SiC from solar wafer cutting waste is of great significance for resource recovery and environmental protection. The fine particles of Si and SiC are easy to agglomerate,resulting in difficulties in chemical separation. In this paper,we use heavy medium micro-cyclone separation technology. The influence of feed flow rate and underflow ratio on the separation performance of heavy medium micro-cyclone was investigated by experiments and numerical simulation. The numerical simulation was carried out using CFD software Fluent 6.3.26 to study the flow field and particle trajectory. The diameter of the micro-cyclone used in the experiment is 10mm,separating the mixed powder of Si and SiC whose particle size distribution is 0.3—25μm. The results showed that the separation efficiency of Si increased first and then tended to be stable with the increase of feed flow rate. When the feed flow rate reached 0.13m3/h,the separation efficiency is no longer increasing. Regardless of the medium is water or heavy medium solution,when the underflow ratio increased,the axial velocity decreased,while the tangential velocity increased first and then decreased. The separation and purification efficiency of Si increased first and then decreased. Moreover,when the underflow ratio is about 0.6,the efficiency reached the highest value. When the Si and SiC were separated by cyclone,the heavy medium solution will make the separation effect better.关键词
分离/微型旋流器/计算流体力学/进料流量/底流分率/粒度分布Key words
separation/micro-cyclone/CFD/feed flow rate/underflow ratio/particle size distribution分类
化学化工引用本文复制引用
袁惠新,华炜杰,付双成,叶娟,程志平..光伏材料切割废液中的Si和SiC旋流分离过程[J].化工进展,2018,37(3):837-844,8.基金项目
国家自然科学基金项目(21676031). （21676031）
