FIELD: metallurgy. SUBSTANCE: mixture contains the following components, wt. %: water glass, 5-7; sodium hydroxide (10-% aqueous solution), 0.5-1.0; hydrolytic resin (by-product of sulfuric acid lignin-containing raw materials), 1.2-2.0; refractory filler, the balance. EFFECT: increased strength of mixture and improved its knock-out. 2 tbl, 1 ex
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