FIELD: building materials. SUBSTANCE: method involves addition of dust waste in metallurgy manufacture to the melt of high-base slag. Waste is obtained in the process of scrubbing of furnace in production of crystalline silicon or ferroalloys at concentration 1-30 wt.-%. Silicon oxide content in its is 30% , not less, following by stirring and cooling of melt. EFFECT: improved method of building material making. 2 tbl
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