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US 8,505,336 B2Granted
AZS refractory composition
AssigneeMagneco/Metrel, Inc.
InventorsCharles W. Connors, Sr., Michael W. Anderson, Shirish Shah
Life of this patent
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Abstract
A refractory composition 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 provided at 5 wt % to 20 wt % of the dry weight of the first set of components. The refractory composition includes 45 wt % to 75 wt % alumina, 15 wt % to 30 wt % zirconia, and 10 wt % to 30 wt % silica.
Claims15
A method of preparing a refractory, comprising:
- providing a first set of components comprising alumina and zirconia,
- wherein the first set of components comprises 35 wt % to 55 wt % alumina particles and 25 wt % to 45 wt % zircon particles, 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 55 wt % to 65 wt % alumina, 20 wt % to 25 wt % zirconia, and 15 wt % to 25 wt % silica;
- and
- forming a monolithic refractory composition on a surface of a furnace.
7 more elements
A method of preparing a refractory, comprising:
- providing a first set of components comprising alumina and zirconia, wherein the median particle size of the first set of components is greater than 40 microns,
- wherein the first set of components comprises 35 wt % to 55 wt % alumina particles and 25 wt % to 45 wt % zircon particles, 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 10 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 55 wt % to 65 wt % alumina, 20 wt % to 25 wt % zirconia, and 15 wt % to 25 wt % silica;
- and
- forming a refractory composition on a surface of a furnace.
7 more elements
Dependencies are inferred from the claim text.