文献类型：期刊文章

作　　者：伍继君[1,2,3] 李彦龙[1,3] 马文会[1,2,3] 魏奎先[1,2,3] 杨斌[1,2] 戴永年[1,2,3]

机构地区：[1]昆明理工大学复杂有色金属资源清洁利用省部共建国家重点实验室/真空冶金国家工程实验室,昆明650093 [2]昆明理工大学云南省有色金属真空冶金重点实验室,昆明650093 [3]昆明理工大学云南省高校硅冶金与硅材料工程研究中心,昆明650093

出　　处：《Transactions of Nonferrous Metals Society of China》

基　　金：Projects (51104080,u1137601) supported by the National Natural Science Foundation of China;Project (14118557) supported by the Personnel Training Foundation of Kunming University of Science and Technology in China

年　　份：2014

卷　　号：24

期　　号：4

起止页码：1231-1236

语　　种：中文

收录情况：AJ、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2013_2014、EBSCO、EI、IC、INSPEC、JST、SCI(收录号：WOS:000339276700042)、SCI-EXPANDED(收录号：WOS:000339276700042)、SCIE、SCOPUS、WOS、ZGKJHX、普通刊

摘　　要：Boron removal from metallurgical grade silicon （MG-Si） using a calcium silicate slag was studied. The results show that it is impossible basically to remove boron using a pure SiO2 refining. The oxidizing ability of CaO-SiO2 slag for boron removal was characterized by establishing the thermodynamic relationship between the distribution coefficient of boron （LB） and the activities of SiO2 and CaO. The experimental results show that the distribution coefficient and the removal efficiency of boron are greatly improved with the increase of CaO proportion in the slag. The maximal value of LB reaches 1.57 with a slag composition of 60%CaO-40%SiO2 （mass fraction）. The boron content in the refined silicon is reduced from 18×10^-6 to 1.8×10^-6 using slag refining at 1600 ℃ for 3 h with a CaO-SiO2/MG-Si ratio of 2.5, and the removal efficiency of boron reaches 90%.

关 键 词：metallurgical grade silicon  boron removal  THERMODYNAMICS distribution coefficient  slag refining  

分 类 号：TF804]