Method for suppressing reaction of molten metals with refractory materials
AssigneeNovelis Inc.
InventorsTodd F. Bischoff, Richard S. Bruski, Robert B. Wagstaff
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Abstract
A method is described for improving resistance to chemical attack by aluminum or magnesium in refractory components. In one method, a slurry is formed comprising calcium silicate-containing refractory material and a barium-containing compound. This slurry is placed in a mold, then dewatered to form a component which is hydrothermally processed to form a final component. In a second procedure, a silica-containing porous refractory component is impregnated with an aqueous solution of an oxide or hydroxide of barium or strontium and thereafter dried in air.
Claims14
A method of stabilizing a porous refractory component made of calcium silicate against reactions with molten aluminum or magnesium, the method consisting of:
- (a) forming an aqueous solution of an oxide or hydroxide of a group II alkali earth;
- (b) impregnating the component made of calcium silicate with the solution;
- and
- (c) drying the impregnated component in air ready for contact with molten aluminum or magnesium.
A method of stabilizing a porous refractory component against reactions with molten aluminum or magnesium, the method comprising:
- (a) forming an aqueous solution of an oxide or hydroxide of a group II alkali earth;
- (b) impregnating the component made of calcium silicate with the solution;
- (c) drying the impregnated component in air;
- and
- (d) further impregnating the impregnated component with a sulfuric acid solution and drying the further impregnated component in air, after step (c), ready for contact with molten aluminum or magnesium.
Dependencies are inferred from the claim text.