Effect of zinc oxide addition in slag system and heating manner on boron removal from metallurgical grade silicon

2017 ◽  
Vol 57 ◽  
pp. 59-62 ◽  
Author(s):  
Jijun Wu ◽  
Zhenfei Xia ◽  
Wenhui Ma ◽  
Fanmao Wang ◽  
Yeqiang Zhou ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Slag System ◽  
Boron Removal ◽  
Metallurgical Grade Silicon ◽  
Oxide Addition ◽  
Grade Silicon

Study of the Removal of Boron from Metallurgical Grade Silicon by Oxidation Slagging Method

2010 ◽  
Vol 156-157 ◽  
pp. 882-885 ◽  
Author(s):  
Yu Yan Hu ◽  
Dong Liang Lu ◽  
Tao Lin ◽  
Yu Liu ◽  
Bo Wang ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Orthogonal Experiment ◽  
Slag System ◽  
Refining Process ◽  
Impact Factors ◽  
Metallurgical Grade Silicon ◽  
Optimum Parameters ◽  
Grade Silicon ◽  
Refining Time ◽  
The Impact

Refining of solar grade silicon by metallurgical method is the research hotspot of polycrystalline field. Slagging method is benefit to the removal of the impurities especially to boron exsisted in the raw silicon. In this study, the influence of the density, the viscosity and liquidus temperature of the slag components on the refining process were discussed, and then the slag system SiO2-Na2CO3 was choosed as the slagging agents. And then the impact factors on the removal efficiency of boron such as the composition of SiO2 and Na2CO3, the ratio of slag to silicon and the refining time were investigated by the orthogonal experiment. The results showed that the optimum parameters of the oxidation refining for removing boron were as follows: the main composition of the oxidant is “SiO2 : Na2CO3 = 60% : 40%”; the slag/silicon ratio is 0.5; time for refining is 60min at 1550 . The results indicated that the removal efficiency of boron was 88.28%, and the content of boron in MG-Si can be reduced to 7ppmw under the best refining process¬.

Boron removal in purifying metallurgical grade silicon by CaO–SiO2 slag refining

2014 ◽  
Vol 24 (4) ◽  
pp. 1231-1236 ◽  
Author(s):  
Ji-jun WU ◽  
Yan-long LI ◽  
Wen-hui MA ◽  
Kui-xian WEI ◽  
Bin YANG ◽  
...  
Keyword(s):  
Boron Removal ◽  
Metallurgical Grade Silicon ◽  
Slag Refining ◽  
Grade Silicon

Boron removal from metallurgical-grade silicon using lithium containing slag

2012 ◽  
Vol 358 (18-19) ◽  
pp. 2708-2712 ◽  
Author(s):  
Zhao Ding ◽  
Wenhui Ma ◽  
Kuixian Wei ◽  
Jijun Wu ◽  
Yang Zhou ◽  
...  
Keyword(s):  
Boron Removal ◽  
Metallurgical Grade Silicon ◽  
Grade Silicon

Multiple Slag Operation on Boron Removal from Metallurgical-Grade Silicon Using Na2O-SiO2 Slags

2014 ◽  
Vol 53 (30) ◽  
pp. 12054-12062 ◽  
Author(s):  
Ming Fang ◽  
Chenghao Lu ◽  
Liuqing Huang ◽  
Huixian Lai ◽  
Juan Chen ◽  
...  
Keyword(s):  
Boron Removal ◽  
Metallurgical Grade Silicon ◽  
Grade Silicon

Boron removal from metallurgical-grade silicon by CaO–SiO2 slag refining

Rare Metals ◽  
2015 ◽  
Vol 34 (7) ◽  
pp. 522-526 ◽  
Author(s):  
Kui-Xian Wei ◽  
Hai-Fei Lu ◽  
Wen-Hui Ma ◽  
Yan-Long Li ◽  
Zhao Ding ◽  
...  
Keyword(s):  
Boron Removal ◽  
Metallurgical Grade Silicon ◽  
Slag Refining ◽  
Grade Silicon

Reaction Mechanism and Kinetics of Boron Removal from Metallurgical-Grade Silicon Based on Li2O-SiO2 Slags

JOM ◽  
2015 ◽  
Vol 68 (9) ◽  
pp. 2371-2380 ◽  
Author(s):  
Huixian Lai ◽  
Liuqing Huang ◽  
Chenghao Lu ◽  
Ming Fang ◽  
Wenhui Ma ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Boron Removal ◽  
Metallurgical Grade Silicon ◽  
Mechanism And Kinetics ◽  
Grade Silicon ◽  
Silicon Based ◽  
Kinetics Of

Boron removal from metallurgical grade silicon using a CaO–Li2O–SiO2 molten slag refining technique

2012 ◽  
Vol 358 (23) ◽  
pp. 3079-3083 ◽  
Author(s):  
Jijun Wu ◽  
Wenhui Ma ◽  
Binjie Jia ◽  
Bin Yang ◽  
Dachun Liu ◽  
...  
Keyword(s):  
Molten Slag ◽  
Boron Removal ◽  
Metallurgical Grade Silicon ◽  
Slag Refining ◽  
Grade Silicon
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