FIELD: metallurgy, heat units. SUBSTANCE: coating has the following ratio of components, wt.-%: quartz component 12.0-45.8; alkaline silicates 2.6-14.4 (as measured for dry matter); corundum 14.4-22.2; dust from casting manufacture gas scrubbing 11.0-60.6; slag from low-carbon ferrochrome production 2.6-14.4, and water - up to dilution. Quartz component: waste from quarts sand concentration, or Dinas refractory scrap, or quartz refractory scrap; corundum: corundum or mullite-corundum refractory component. EFFECT: enhanced quality and property, decreased consumption. 7 cl
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