C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
261/38
C04B 35/10 (2006.01) C04B 35/18 (2006.01) C04B 35/66 (2006.01) F27D 1/00 (2006.01) F27D 21/02 (2006.01) G01J 5/04 (2006.01) F27D 21/00 (2006.01)
Patent
CA 1150738
ABSTRACT OF THE DISCLOSURE There is proposed a refractory powder containing from 40 to 70 weight percent of aluminium oxide, from 29 to 59 weight percent of silicon dioxide, and from 0.3 to 2.0 weight percent of a sintering agent. Various materials are recommended for use as the sintering agent, and in particular the boric acid. The proposed refractory powder is produced as follows: the aluminium oxide and silicon dioxide powders are first heated to a temperature of from 1200°C to 1400°C and from 900°C to 1200°C respectively, whereafter said powders are cooled to room temperature, and then mixed with adding the sintering agent to produce a uniform mixture. The specification of the invention discloses various modifications of the method of producing the refractory powder of the invention. The proposed powder is capable of preventing a corundum light transmitting member of the light transmitting device mounted in the lining of a metallurgical vessel for transmitting thermal gradiation from a melt to a pyrometer, from being damaged during the operation of said metallurgical vessel.
367853
Chugunny Evgeny G.
Zhukov Leonid F.
Institut Problem Litya Akademii Nauk Ukrainskoi Ssr
Swabey Ogilvy Renault
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