Metallothermal process for the simultaneous production of magnesium and cement or calcium and cement
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United States of America Patent
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Dec 23, 1980
Grant Date -
N/A
app pub date -
Aug 8, 1979
filing date -
Aug 8, 1979
priority date (Note) -
Expired
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Abstract
The invention relates to a new process for the simultaneous production of magnesium and cement from calcined dolomite or calcium and cement from calcined lime. According to the invention calcined dolomite or calcined lime is reduced under a pressure lower than 10 torr and at a temperature of 1300.degree. to 1600.degree. C. with a reducing agent containing silicon and aluminum in a weight ratio of 4:1 to 1:1, wherein the total amount of silicon and aluminum comprises 50 to 100% by weight. 100 to 200 parts by weight of the reducing agent are applied to convert 600 to 800 parts by weight of calcined dolomite or 700 to 1000 parts by weight of calcined lime. In contrast to the known procedures, the new method according to the invention provides cement as by-product instead of a useless slag.
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