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US 8,505,335 B2Granted
Refractoy composition for glass melting furnaces
AssigneeMagneco/Metrel, Inc.
InventorsCharles W. Connors, Sr., Michael W. Anderson, Shirish Shah
Life of this patent
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Abstract
A refractory system includes a first set of components and a colloidal silica binder. The first set of components includes alumina and zirconia. The colloidal silica binder is at 5 wt % to 20 wt % of the dry weight of the first set of components. The refractory composition comprises 10 wt % to 45 wt % alumina, at least 35 wt % zirconia, and at least 20 wt % silica.
Claims10
A method of preparing a refractory for a glass melting furnace, comprising:
- providing a first set of components comprising alumina and zirconia, wherein the first set of components comprises 10 wt % to 35 wt % alumina, 60 wt % to 85 wt % zircon, and up to 10 wt % silica, and
- wherein the zirconia comprises
- a first portion having a larger particle size, the first portion comprising zircon sand and
- a second portion having a smaller particle size, the second portion comprising zircon flour, and
- providing a colloidal silica binder at 5 wt % to 20 wt % of the dry weight of the first set of components,
- mixing the first set of components with the colloidal silica binder to form a refractory composition comprising about 15 wt % to 30 wt % alumina, 40 wt % to 55 wt % zirconia, and 25 wt % to 35 wt % silica;
- and
- forming a monolithic refractory composition on a surface of the furnace.
5 more elements
Dependencies are inferred from the claim text.