High purity fused grain in the system Al.sub.2 O.sub.3 -Cr.sub.2 O.sub.3 -MGO
AssigneeIndresco Inc.
InventorsAlbert L. Renkey, Stanley R. Pavlica
Life of this patent
Estimating the term…
Abstract
High purity fused grain and refractory compositions that contain a high purity fused grain made up of 35 to 85 wt. % chromia, 5 to 55 wt. % alumina, and 5 to 45 wt. % magnesia. Burned refractory brick having such a chemistry was found to unexpectedly possess superior resistance to AOD and electric furnace slags.
Claims8
A high purity fused refractory grain consisting essentially of 35 to 85 wt. % chromia, 5 to 55 wt. % alumina, and 5 to 45 wt. % magnesia.
A refractory shape which consisting essentially of a high purity fused grain consisting essentially of 35 to 85 wt. % chromia, 5 to 55 wt. % alumina, and 5 to 45 wt. % magnesia.
An improved refractory lining for an Argon Oxygen Decarburization (AOD) vessel which consists essentially of a fused grain made from 35 to 85 wt. % chromia, 5 to 55 wt. % alumina, and 5 to 45 wt. % magnesia.
An improved refractory lining for an electric arc furnace which consists essentially of a fused grain made from 35 to 85 wt. % chromia, 5 to 55 wt. % alumina, and 5 to 45 wt. % magnesia.
Dependencies are inferred from the claim text.