Gypsum-based granules and method of production
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United States of America Patent
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-
Jan 15, 1980
Grant Date -
N/A
app pub date -
Dec 27, 1977
filing date -
Dec 27, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Calcium sulfate hemihydrate is processed into agglomerates such as granules and/or macrogranules by addition of an aqueous binder to a fluidized charge of calcium sulfate hemihydrate particles. The hemihydrate particles are agglomerated to a predetermined size range and hydrated to calcium sulfate dihydrate. The produced agglomerates have a bulk density of less than about 55 pounds per cubic foot, a surface hardness providing less than about 40 percent attrition, and a liquid holding capacity of at least about 10 percent.
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