PRETREATMENT METHOD OF SINTERED RAW MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a pretreatment method of a sintered raw material which can suppress increase of NOx discharge while improving sintering productivity.SOLUTION: A coagulation material used for production of sintered ore for steel production is granulated in the presence of moisture with a binder consisting of one or both of quick lime and hydrated lime, and becomes agglomerated material that under 0.5 mm is 40 mass% or less and over 2.8 mm is 30 mass% or less. The agglomerated material is supplied to a sintering machine after being added in other sintered raw materials which mean particle diameter after granulation is 0.5 mm or more and less than 5 mm.SELECTED DRAWING: Figure 1