SIMULTANEOUS TREATMENT OF SLAG AFTER STEEL MANUFACTURE, DUST AFTER STEEL MANUFACTURE AND SLUDGE

摘要

PURPOSE:To make a melt slagging reaction perfect by adding a modifier and dust heated to a high temp. by roasting with a carbonaceous solid fuel to molten slag and by bringing them into said reaction at a high temp. CONSTITUTION:A carbonaceous solid fuel is added to a modifier for modifying slag 2 after steel manufacture, dust after steel manufacture and sludge by an amount required to roast them, and they are briquetted. The briquettes 6 are charged into a roasting apparatus 5, roasted to a red-hot state, and added to molten slag 2. Volatile matter is volatilized, and a melt slagging reaction is caused to modify the slag. The resulting molten slag 10 is solidified, the solidified slag is crushed, and luppe is recovered. The volatilized volatile matter is recovered by suction with a dust collector.