Magneco/metrel, Inc.

Shirish Shah

Michael W Anderson

Charles W Connors, Sr

Charles W Connors, Jr

George M Connors

Charles W Connors

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.

AZS refractory composition

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.

Refractoy composition for glass melting furnaces

A method of casting a refractory article. The method includes providing a mold formed from a slurry composition comprising plaster and fibers and adding a refractory composition to the mold. The method also includes allowing the refractory composition to set. The refractory composition comprises colloidal silica.

Refractory casting method

A slurry composition for a mold and method of use thereof. The slurry composition includes about 45-80% by weight alumina, about 10-30% by weight silicon carbide, and about 10-50% by weight colloidal silica. In one aspect, the alumina component comprises a material selected from the group consisting of brown fused alumina, white fused alumina, tabular alumina, calcined alumina, and mixtures thereof. In another aspect, the composition includes fumed silica at 2-5% by weight. The composition may also include a setting agent at 0.05-2% by weight.

Molding composition and method of use

An improved castable refractory composition having excellent resistance to attack from slag can be efficiently transported to a destination, such as a mold, using a pump. The castable refractory composition includes about 36-92% by weight silicon carbide, about 8-20% by weight of a colloidal silica binder, and a balance substantially of other refractory materials which can include alumina, microsilica, graphite, and a setting agent. The composition of the invention can be used alone or in addition to a conventional refractory casting material to form a refractory lining. When used together, the conventional refractory composition is used to construct a lower layer in the refractory lining, and the composition of the invention is used to construct an upper refractory layer above the lower layer.

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Carol Stream, IL, United States of America

Shirish Shah