Patent ID: 7402191

Claim:
A manufacturing method of a material for use in sintering characterized in that, as a pretreatment of a manufacturing process of a sintered ore for use in a blast furnace with a Dwight-Lloyd type sintering machine of downward suction, when a sintering material including iron ore, a SiO 2 -containing material, a limestone base powdery material and a solid fuel type powdery material is granulated by use of a drum mixer, the method comprises: charging sintering material, excepting the limestone base powdery material and solid fuel type powdery material, to a charge inlet of the drum mixer, granulating the sintering material in the drum mixer, and charging an additional coating auxiliary raw material to the drum mixer in a region disposed in a downstream side of the drum mixer and at a location where a staying time during which the sintering material reaches up to an exhaust outlet of the drum mixer is in the range of from 10 to 90 seconds, and thereby until reaching the exhaust outlet, the additional coating auxiliary raw material is deposited and formed on a exterior coating portion of the granulated sintering material.