C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
261/6
C04B 35/56 (2006.01)
Patent
CA 2021212
ABSTRACT A process for the manufacture of raw material moulds, particularly for use in the production of silicone or silicone alloys in an electro cupola furnace, wherein quartz sand, a non-caking carbon carrier, preferably petrol coke, and a pitch containing binder are admixed, the resulting starting mixture is compressed to briquette blanks, and the briquette blanks are processed to the raw material moulds through a solidifying heat treatment. The pitch containing binder is a binder mixture of pitch and caking coal which has a temperature of 100 to 200°C. The quartz sand and a non-caking carbon carrier are admixed with the binder mixture at a mixing temperature which is in the same temperature range as the binder mixture. The starting mixture is compressed to briquette blanks starting at the mixing temperature. The briquette blanks are subjected to a heat treatment which has an end temperature of over 450°C. Subject of the invention are also raw material moulds manufactured by that process. The raw material moulds are characterized by their long term properties such as a constant stability even after outside storage. PAT 15848-1
Applied Industrial Materials Corporation Aimcor
Borden Ladner Gervais Llp
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