FIELD: metallurgy. SUBSTANCE: mixture has the following components, wt. -%: depleted sand-clay mixture 38.0-47.0; water-glass binding agent 4.2-4.4; aluminium hydroxide 0.20-0.25; sodium hydroxide 0.50-0.55; technical water 0.60-0.80 and silicon dioxide-base refractory filling agent - the rest. Mixture can be used for making casting forms and rods solidified by heat drying. EFFECT: decreased consumption of pure refractory filling agent, unusing molding clay, improved knocking-out, retained necessary strength after hardening, decreased collapsibility mixture. 5 tbl, 1 dwg
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