The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 03, 1976
Filed:
Mar. 04, 1974
John P Holt, Ladue, MO (US);
Theodore Paul Cash, Bonne Terre, MO (US);
Delbert E Day, Rolla, MO (US);
Valley Mineral Products Corporation, St. Louis, MO (US);
Abstract
This disclosure concerns a thermo-chemical bonded refractory product which comprises inactive refractory grains bonded together by mullite. The refractory is emplaced in a furnace or other pyro-processing unit by pressing, ramming, gunning, casting, etc. The refractory product is made by mixing inactive refractory grains with a mixture of zircon and alumina powders and a small amount of an alkaline earth oxide catalyst. The catalyst breaks the zircon down into ZrO.sub.2 and SiO.sub.2 at relatively low temperatures. The SiO.sub.2 thus liberated is unusually reactive and reacts with the alumina to form mullite and the ZrO.sub.2 adsorbs the alkaline earth oxide.