FIELD: metallurgy.
SUBSTANCE: invention concerns the metallurgy industry. Particularly it concerns preparing of charge material for steelmaking. Preform contains oil calx 25-35%; dust from scrubbing of Martin furnace and utility "Furnace - scoop " 4.7-10.0%; fine magnetic output 40-60%; activated sludge 10-15%; slaked lime from 10 till 0%; cement from 10 till 0%.
EFFECT: usage of performs which contain activated sludge - sediment of biological treatment facilities from local and manufacturing effluents, will allow to receive steel with minimal cost for carbonaceous part of charge and simultaneously will be implemented utilisation of contaminating environment material and with reduced content of sulphur, phosphorus and carbon.
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