Method of protecting ladle linings
AssigneeMinerals Technologies Inc.
InventorsJulie A. Dody, Charles R. Rumpeltin, Jr.
Life of this patent
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Abstract
The disclosed invention provides a method of forming refractory linings for maintaining refractory linings against attack by corrosive materials such as those present in steel manufacture. The method entails spraying an aqueous mixture of a refractory composition that includes at least one refractory material onto the working surface of a refractory lining. Spraying is performed to provide one or more layers of the refractory composition on the refractory lining after each exposure of the lining to corrosive materials such as those incurred in steel manufacture.
Claims15
A method of forming a coated expendable refractory lining having increased resistance to erosive and corrosive materials comprising,
- providing an aqueous mixture comprising about 35% magnesia and about 59.6% olivine as refractory materials, about 0.4% bentonite as a plasticizer, and about 5% sodium silicate as a high temperature binder for spraying onto an expendable refractory lining,
- supplying said mixture to a spray nozzle which is positionable adjacent said refractory lining, said lining having a temperature of about 55.degree. to about 3000.degree. F., and
- spraying said mixture onto said refractory lining to provide a layer of said refractory composition on said refractory lining at a thickness sufficient to provide increased resistance to erosive and corrosive materials.
A method of forming a coated expendable refractory lining having increased resistance to erosive and corrosive materials comprising:
- providing an aqueous mixture comprising about 80% to 95% of a refractory material of magnesia, olivine, fireclay, dolomite, calcia, zirconia, alumina, silica, chromite, graphite, zircon, or mixtures thereof;
- about 0.1 to 10% of a binder having an effective temperature range up to at least 3000.degree. F. of a phosphate, silicate, or sulfate;
- and
- about 0.1 to 5% of a plasticizer of clay, starch, or aluminum hydroxide for spraying onto an expendable refractory lining;
- supplying said mixture to a spray nozzle which is positionable adjacent said refractory lining, said lining having a temperature of about 55.degree. to about 3000.degree. F., and
- spraying said mixture onto said refractory lining to provide a layer of said refractory composition on said refractory lining at a thickness sufficient to provide increased resistance to erosive and corrosive materials.
Dependencies are inferred from the claim text.