Abstract: The invention is directed to a method of providing a protective coating composition that protects a refractory wall or lining from chemical attack by molten aluminum and molten alkali metals. The method includes the steps of coating a refractory wall or liner with an aqueous protective composition that includes, by weight of the solids, about 20-90% Al2O3 (excluding calcined alumina), about 15-55% SiO2 and about 1-15% of a metallic non-wetting agent; and evaporating the water before contacting the protective coating with the reactive molten metal.

Abstract: A method of providing a chemically inert concrete includes the steps of providing and mixing an aqueous colloidal silica dispersion with a quantity of glass particles. The chemically inert concrete includes, based on dry weight, about 50% to about 95% by weight of the glass particles and about 3% to about 40% by weight of the colloidal silica particles. The chemically inert concrete is substantially or totally free of Group I and Group II metal oxides, exclusive of the glass particles, and is substantially or totally free of cement.

Abstract: A method of making a refractory article having excellent high-temperature thermal shock resistance and creep resistance is provided. The method includes the step of providing a refractory composition primarily composed of chamotte having controlled particle sizes. The refractory composition may also include mullite, fused silica, calcined alumina and microsilica having controlled particle sizes, and further includes an aqueous colloidal silica binder. The refractory composition is then formed into a refractory article, which is dried and hardened.

Abstract: A refractory kiln car formed using a refractory composition has excellent resistance to high-temperature thermal shock and creep. The refractory composition is based primarily on chamotte having controlled particle sizes, and may also include mullite, fused silica, calcined alumina and microsilica, having controlled particle sizes. The refractory composition includes an aqueous colloidal silica binder that provides excellent castability and binding between the ingredients following drying.

Abstract: The aqueous protective coating composition is provided for easy application to refractory linings and walls. When dried, the protective coating composition provides excellent chemical resistance to molten aluminum alkali metals and vapors. The protective coating composition includes alumina and silica, suitably provided as mullite, calcined alumina, and colloidal silica; and a metallic non-wetting agent.

Abstract: A refractory kiln car formed using a refractory composition has excellent resistance to high-temperature thermal shock and creep. The refractory composition is based primarily on chamotte having controlled particle sizes, and may also include mullite, fused silica, calcined alumina and microsilica, having controlled particle sizes. The refractory composition includes an aqueous colloidal silica binder that provides excellent castability and binding between the ingredients following drying.

Abstract: A method of making a refractory article having excellent high-temperature thermal shock resistance and creep resistance is provided. The method includes the step of providing a refractory composition primarily composed of chamotte having controlled particle sizes. The refractory composition may also include mullite, fused silica, calcined alumina and microsilica having controlled particle sizes, and further includes an aqueous colloidal silica binder. The refractory composition is then formed into a refractory article, which is dried and hardened.

Abstract: A refractory composition yields refractory articles having excellent resistance to high-temperature thermal shock and creep. The refractory composition is based primarily on chamotte having controlled particle sizes, and may also include mullite, fused silica, calcined alumina and microsilica, having controlled particle sizes. The refractory composition includes an aqueous colloidal silica binder that provides excellent castability and binding between the ingredients following drying.

Abstract: A method of providing a chemically inert concrete includes the steps of providing and mixing an aqueous colloidal silica dispersion with a quantity of glass particles. The chemically inert concrete includes, based on dry weight, about 50% to about 95% by weight of the glass particles and about 3% to about 40% by weight of the colloidal silica particles. The chemically inert concrete is substantially or totally free of Group I and Group II metal oxides, exclusive of the glass particles, and is substantially or totally free of cement.

Abstract: The aqueous protective coating composition is provided for easy application to refractory linings and walls. When dried, the protective coating composition provides excellent chemical resistance to molten aluminum alkali metals and vapors. The protective coating composition includes alumina and silica, suitably provided as mullite, calcined alumina, and colloidal silica; and a metallic non-wetting agent.

Abstract: The invention is directed to a method of providing a protective coating composition that protects a refractory wall or lining from chemical attack by molten aluminum and molten alkali metals. The method includes the steps of coating a refractory wall or liner with an aqueous protective composition that includes, by weight of the solids, about 20-90% Al2O3 (excluding calcined alumina), about 15-55% SiO2 and about 1-15% of a metallic non-wetting agent; and evaporating the water before contacting the protective coating with the reactive molten metal.

Abstract: The invention is directed to a method of providing a protective coating composition that protects a refractory wall or lining from chemical attack by molten aluminum and molten alkali metals. The method includes the steps of coating a refractory wall or liner with an aqueous protective composition that includes, by weight of the solids, about 20-90% Al2O3 (excluding calcined alumina), about 15-55% SiO2, and about 1-15% of a metallic non-wetting agent; and evaporating the water before contacting the protective coating with the reactive molten metal.

Abstract: The aqueous protective coating composition is provided for easy application to refractory linings and walls. When dried, the protective coating composition provides excellent chemical resistance to molten aluminum alkali metals and vapors. The protective coating composition includes alumina and silica, suitably provided as mullite, calcined alumina, and colloidal silica; and a metallic non-wetting agent.

Abstract: A chemically inert concrete composition includes, based on dry weight, about 50% to about 95% by weight glass particles and about 3% to about 40% by weight colloidal silica particles. Optional additional chemically inert ingredients can be included in amounts of about 3% to about 40% by weight. The concrete composition is substantially or totally free of Group I and Group II metal oxides, exclusive of the glass particles, and is substantially or totally free of cement.