| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for effectively using woody biomass in a steel plant, that is, the methods for operating a blast furnace using woody biomass as a raw material and for producing cokes using woody biomass as the raw material, and also to achieve the reduction of a reducing material ratio in the blast furnace by using woody biomass. <P>SOLUTION: The method for operating a blast furnace is characterized by heating and drying the woody biomass to use as a blast-furnace raw material. In that case, they are preferable to: dry the woody biomass so as to be ≥5 and <30 mass% in a moisture content; perform drying of the biomass by using the waste heat of ≤300°C; pulverize the dried biomass to obtain a molded body by molding together with a coal; and charge, in the blast furnace, the cokes produced by charging the molded body with the coal in a coke oven and drying it. <P>COPYRIGHT: (C)2012,JPO&INPIT |
