Protective coating for metal ingot molds and cores

摘要: A protective coating includes fire clay, graphite, water glass, and alumina-containing material, the ingredients being present in an amount of up to a half weight total mixture. Used as material are such substances commercial alumina, abrasive slurry, catalyst wastes from production synthetic rubber. The may also include its composition boron-containing 0 10 percent by composition, datolite danburite concentrate, ascharite, boric acid, colemanite, pandermite, borocalcite, boronatrocalcite, well soda ash 5 weight.