Coke oven patching and sealing material
AssigneeUnited States Steel Corporation
InventorRoger L. Rueckl
Life of this patent
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Abstract
A patching composition for developing a superior bond with silica refractories at temperatures of 1200.degree. to 2400.degree. F. The composition comprises three basic components: (1) a high melting phase, e.g. silica brick, fireclay grog, magnesia or high alumina grain, (2) a bonding component, e.g. sodium silicate and (3) a low melting phase, e.g. window glass. It will generally be desirable to employ a fourth component for fluxing, such as soda ash or other alkaline earth compounds. The improved results are achieved by the use primarily, of a low melting phase such as window glass, bulb glass or lead glass having a softening point between about 900.degree. and 1750.degree. F. (482.degree. to 954.degree. C.), employed in an amount of about 6 to 25% of the total solids composition.
Claims4
A composition for the production of mixes useful for the patching and sealing of refractory structures which are subject to thermal cycling, such composition consisting essentially of, on a dry basis, the following components,
- a. 55 to 80% of a high melting phase, selected from the group consisting of (i) silica, (ii) magnesia, (iii) alumina or (iv) combinations thereof,
- b. 5 to 15% of a binder phase and,
- c. 15 to 20% of a glass phase having a softening point between 900.degree. and 1750.degree. F., wherein at least 90% of said components are finer than 10 mesh.
A method for the patching and sealing of cracks in coke ovens, which comprises applying to such cracks a patching material consisting essentially of, a first fraction composed of, on a dry basis,
- a. 55 to 80% of a high melting phase, selected from the group consisting of (i) silica, (ii) magnesia, (iii) alumina or (iv) combinations thereof,
- b. 5 to 15% of a binder phase and,
- c. 15 to 20% of a glass phase having a softening point between 900.degree. and 1750.degree. F.,
- wherein at least 90% of each a., b. and c. are finer than 10 mesh, and
- a second fraction consisting essentially of 10 to 60 weight units of water for each 100 weight units of said first fraction.
Dependencies are inferred from the claim text.