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J. Cent. South Univ. (2017) 24: 2245-2252 DOI: https://doi.org/10.1007/s11771-017-3634-2 Effect of ultraviolet mutagenesis on heterotrophic strain mutation and bioleaching of low grade copper ore WU... 2017 Abstract: The effect of ultraviolet mutagenesis on a heterotrophic strain (Providencia JAT-1) mutation was studied and bioleaching of low grade copper ore with mutant bacteria was investigated......
Trans. Nonferrous Met. Soc. China 24(2014) 1231-1236 Boron removal in purifying metallurgical grade silicon by CaO-SiO2 slag refining Ji-jun WU1,2,3, Yan-long LI1,3, Wen-hui MA1,2,3, Kui-xian...; accepted 26 August 2013 Abstract: 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......
Trans. Nonferrous Met. Soc. China 23(2013) 260-265 Thermodynamic behavior and morphology of impurities in metallurgical grade silicon in process of O2 blowing Ji-jun WU1,2,3, Wen-hui MA1,2,3, Yan... for their inertia in silicon melt with O2 blowing. Key words: metallurgical grade silicon; thermodynamics; O2 blowing; impurities; inclusion; removal efficiency 1 Introduction Metallurgical grade......
is obviously improved compared with the purity of the metallurgical grade silicon of 99.59%, proving the feasibility of this purification method. Furthermore, the mass fraction of B is reduced from... plus acid leaching was introduced to the Al-Si solidification refining process for the separation of primary silicon and purification of metallurgical grade silicon. The morphologies of Al-Si alloy......
冶金法提纯工业硅的研究 刘德华1,李廷举1,刘宁1,张国梁1,马晓东1 (1.大连理工大学,材料科学与工程学院,辽宁,大连,116024) 摘要:以冶金级硅为原料进行了制备高纯多晶硅锭的研究,自行设计了真空感应熔炼与定向凝固设备,电子束熔炼设备.通过酸洗,真空感应熔炼与第一次定向凝固,电子束熔炼,真空感应熔炼与第二次定向凝固等组合步骤对工业硅进行提纯.利用电感耦合等离子体发射光谱仪(ICP-AES)进行成分分析,实验结果表明,定向凝固有效去除了金属杂质,电子束对蒸汽压高的元素,尤其是磷元素的去除作用明显.Al的浓度降低到了0.4×10~(-6),Fe,Ca,Ti,Mn,Cu,Zn等金属杂质的浓度降到了0.1×10~(-6)以下,P含量降低到1.5×10~(-6). 关键词:冶金级硅; 真空感应熔炼; 定向凝固; 电子束熔炼; metallurgical grade silicon......
as a starting material in the photovoltaic industry. In recent years, metallurgical grade silicon (MG-Si) [1] has been used as a feedstock alternative to substitute electronic grade silicon to solve the problem of silicon feedstock shortage. The purity of metallurgical grade silicon is 2N. Therefore, to satisfy the purity requirements of solar grade silicon (SOG-Si), it is necessary to remove a variety......
Trans. Nonferrous Met. Soc. China 22(2012) 2548-2553 Preparation, microstructure and dislocation of solar-grade multicrystalline silicon by directional solidification from metallurgical-grade... 2012 Abstract: A vacuum directional solidification with high temperature gradient was performed to prepare low cost solar-grade multicrystalline silicon (mc-Si) directly from metallurgical-grade mc-Si......
efficiency of Cu by HF is very poor, with the removal rate reaches 4.8%. The structural phase analysis results show that Al-Si-Cu is the main existence form of Cu in metallurgical grade silicon (MG-Si.... REFERENCES [1] KHATTAK C P, JOYCE D B, SCHMID F. A simple process to remove boron from metallurgical grade silicon[J]. Solar Energy Materials and Solar Cells, 2002, 74: 77-79. [2] BRAGA A F B, MOREIRA S P......
for removal of SiC particles from metallurgical grade silicon (MG-Si) was presented. Numerical methods based on a combination of classical models for inclusion removal and computational fluid dynamics (CFD... Introduction Carbothermic reduction of quartz in submerged arc furnaces is the established process in order to produce metallurgical grade silicon (MG-Si). The liquid silicon produced at temperatures......
through the metallurgical treatments may be a promising way for producing solar grade silicon (SOG-Si) from metallurgical grade silicon (MG-Si). Solidification of silicon is a well known process... Thermodynamic evaluation of new metallurgical refining processes for SOG-silicon production Kazuki MORITA, Takeshi YOSHIKAWA Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba......
