PRODUCTION OF GRANULAR ZIRCONIA PRODUCTS
Patent
·
OSTI ID:4130047
A process for producing low-silica zirconia grain or powder directly from zircon or other zirconia ores is described. A mixture of a silica- containing zirconium ore, carbon, and an oxide or oxide-forming compound of an alkaline earth metal, including magnesium, is heated to at least 4500 deg F in an arc furnace in the presence of nitrogen to dissociate the zirconium silicate present, to vaporize substantially all of the silica present in the mixture, and to form a fused pig of the complex, reduced zirconium product. This product is subjected to oxidizing conditions while at a temperature of at least 1500 deg F to oxidize the zirconium cyanonitride present and to cause the product to disintegrate into a granular material. (M.C.G.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-18-003909
- OSTI ID:
- 4130047
- Report Number(s):
- GB 942079
- Country of Publication:
- United Kingdom
- Language:
- English
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