Mixture for fabrication of fireproof high-strength spherical granules and the method of their manufacture
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United States of America Patent
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Sep 18, 2007
Grant Date -
Mar 16, 2006
app pub date -
Nov 8, 2005
filing date -
May 8, 2003
priority date (Note) -
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Abstract
The inventive method for producing refractory high-strength spherical granules consists in separately presintering kaolin and bauxite in a rotational furnace, jointly sintering said components in order to produce a charging material, granulating, drying and screening said charging material, sintering said granules in the rotational furnace and screening the sintered granules. Said sintered kaoline is produced by sintering at a temperature ranging from 1400 to 1500 DEG C so far as a water absorption of 5% is attained for kaoline containing 40-45 mass % and a free quartz in a quantity equal to or greater than 60 mass %. The Al.sub.2O.sub.3:SiO2 ratio in the charging material is equal to 1:1 at the following charging material component ratio: 36-67 mass % sintered kaolin and the rest being sintered bauxite.
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