FIELD: metallurgy. SUBSTANCE: mixture of iron-containing charge materials for steel-melting furnace are subjected to preliminary continuous heating to reduce formation of toxic gases; heating is effected by means of furnace exhaust gases. Plant is provided with combustion control devices. Waste gases are then treated through thermal calcination of residual combustible materials before exhausting them into atmosphere to exclude toxic gases. EFFECT: avoidance of toxic gases. 29 cl, 4 dwg
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