High-density magnesia-calcia clinker and process for production thereof
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United States of America Patent
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Jul 21, 1987
Grant Date -
N/A
app pub date -
Jul 17, 1985
filing date -
Jul 17, 1985
priority date (Note) -
Expired
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Abstract
A magnesia-calcia clinker having a high density, said clinker containing MgO, CaO and Fe.sub.2 O.sub.3 as oxides, having the following chemical composition in percent by weight MgO, CaO and Fe.sub.2 O.sub.3 : at least 99% in total MgO: at least 10% Fe.sub.2 O.sub.3 : 0.2-5% and having a density corresponding to at least 97.5% of the theoretical density. The above magnesia-calcia clinker can be produced by adding a water-soluble iron compound to sea water, bittern or brine, simultaneously with, or after, the addition of the water-soluble iron compound, adding a calcined product of dolomite, lime or a hydrate thereof to form a precipitate composed mainly of magnesium hydroxide, mixing the resulting magnesium hydroxide with a calcium compound, and dead-burning the resulting mixture.
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