Patent ID: 8569191
Filing Date: 2013-10-29
Classification: C21B,C22B,F27B,F27D

Abstract:
1. A layered refractory lining for a furnace, for use in a titanium ore beneficiation process wherein a titanium oxide-rich and iron oxide-rich molten slag is formed, comprising: (a) a first layer comprising alumina and zirconia having about 90 to about 99 wt. % alumina, and about 1 to about 10 wt. % zirconia, based on the entire weight of the first layer; (b) a second layer comprising a resistant agent reaction product of the molten slag and the alumina and the zirconia; wherein the second layer is between the molten slag and the first layer; and wherein the total amount of calcium oxide, magnesium oxide, yttrium oxide and cerium oxide is less than 1 wt. %, based on the total weight of the refractory body.