FIELD: production of refractory concrete mix used in ferrous metallurgy for manufacture of refractory concrete lining of high-temperature thermal units, mainly lining of blow tuyeres immersed in molten metal.
SUBSTANCE: proposed refractory concrete mix contains chamotte filler, high-alumina cement, sodium tripolyphosphate, crushed steel, water and dust-like quartz at the following ratio of ingredients, mass-%: high-alumina cement, 15-20; sodium tripolyphosphate, 0.3-0.5; dust-like quartz, 1-5; crushed steel, 2-3; water, 6-8; the remainder being chamotte filler. Used as chamotte filler is chamotte of two fractions: 20-3 mm and 3-0 mm at mass ratio of 30:70.
EFFECT: enhanced resistance of lining of tuyeres for off-furnace treatment of molten cast iron due to enhanced strength and heat resistance.
2 cl, 2 tbl
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