Low oxygen-content metallurgical silicon and ferrosilicon
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United States of America Patent
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Jul 21, 1998
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N/A
app pub date -
Jan 11, 1996
filing date -
Jan 9, 1995
priority date (Note) -
Expired
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Abstract
A metallurgical silicon or ferrosilicon in the form of granulates having an average size of less than 10 mm and in which the total oxygen concentration is less than 0.05% by weight, and a process for manufacture of this silicon or ferrosilicon consisting of a carbothermal reduction of silica in an electric oven, chlorine-based refining of the liquid metal, and granulation of the refined liquid metal in water under an inert atmosphere. The silicon may be used for silicone manufacture or as a constituent of an aluminum alloy, and the ferrosilicon, as a steel additive used to obtain magnetic sheet metals for electrical construction.
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