Abstract: n the study, steelmaking sludge, quartz sand and manganese ore were mixed at a specific ratio to make slag former for semisteel steelmaking, and this method was experimental vivificated to feasible, steelmaking sludge was cyclic utilized. Industrial test show that the new slag former had a better metallurgical effect than the old one. Slag forming time was shortened by 0.5 min, the dephosphorization rate and manganese mass fraction of the molten steel was improved by 1.2 % and 0.01 % respectively, the mass fraction of T.Fe was reduced by 0.55 % in slag and phase composition of the slag completely meet the requirement of splashing, by which a better splashing effect was obtained.

Key words: steelmaking sludge, slag former, recycling;secondary resource