METHOD OF PROVIDING A PROTECTIVE COATING COMPOSITION FOR MOLTEN ALUMINUM AND ALKALI METAL ENVIRONMENTS
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United States of America Patent
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Aug 12, 2016
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Aug 12, 2016
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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.
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