Refractory gun mix
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United States of America Patent
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Jun 30, 1981
Grant Date -
N/A
app pub date -
Mar 27, 1980
filing date -
Mar 27, 1980
priority date (Note) -
Expired
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Abstract
A refractory gun mix contains from 1 to 5% alkali metal phosphate, for example monosodium phosphate, sodium tripolyphosphate, or a long chain glassy polyphosphate, from 0.5 to 5% hydrated aluminum sulfate (e.g., Al.sub.2 (SO.sub.4).sub.3.14H.sub.2 O), from 0.5 to 5% bentonite, and up to 10% pitch, preferably hard pitch, the balance being sized refractory grain, preferably MgO-containing and/or CaO-containing grain such as periclase, chrome ore, and/or dolomite. In a preferred embodiment, the alkali metal phosphate contributes three atoms of phosphorous for each atom of aluminum contributed by the aluminum sulfate.
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