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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 4    August 2001

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Experimental thermodynamic research on equilibrium
between silicon alloy and SiO2-CaO-Al2O3 melt
WANG Xin-guo(王新国), DING Wei-zhong(丁伟中),
TANG Kai(唐 恺), JIANG Guo-chang(蒋国昌), XU Kuang-di(徐匡迪)

Shanghai Enhanced Laboratory of Ferrometallurgy,
Shanghai University,Shanghai 200072, P.R.China

Abstract:The equilibria of Al and Ca between silicon alloy and the SiO2-Al2O3-CaO ternary slags were investigated using graphite crucible at 1 550 ℃. With increasing Al2O3 and CaO content in the slags, the Al and Ca content increase respectively. The variation of the impurities are also affected by the silica content in slag which provides the oxidant during the oxidation refining process. The distributions of the impurities Al and Ca in silicon were given in terms of isoconcentration curves for Al and Ca in the ternary slags of SiO2-Al2O3-CaO. The present experimental work provided available data to analyze the action of Al and Ca during oxidation refining process for silicon alloy.

 

Key words: silicon; oxidation refining; thermodynamic equilibrium

ISSN 1672-7029
CN 43-1423/U

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