FIELD: foundry. SUBSTANCE: mix according to 1st version contains, wt %: liquid glass binder 2.75-3.00, phenol-formaldehyde resin 0.08-0.17, aluminum sulfate 0.0003-0.003, industrial-grade water 0.0027-0.027, and silica-based refractory filler - the balance. The 2nd-version mix is composed of, wt %: liquid glass binder 2.75-3.00, phenol-formaldehyde resin 0.08-0.17, ammonium sulfate 0.001-0.008, industrial-grade water 0.002-0.016, and silica-based refractory filler - the balance. EFFECT: reduced consumption of liquid glass binder, increased strength characteristics after hot drying, and facilitated splitting-out. 3 cl, 4 dwg, 3 tbl
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