高炉の還元材比におよぼすフェロコークス多量装入の影響

摘要

近年，製造業では，エネルギー効率の改善による地球温暖化ガスの排出削減が求められている。高炉をはじめとする製銑工程で使用されるエネルギーは製鉄プロセス全体ェネルギーの約70%を占めており，更なるエネルギーの削減には，高炉における炭素使用量の削減，すなわち還元材比の低減が不可欠である。%The mathematical model which describes the behavior of ferrocoke in blast furnace was developed and incorporated into the mathematical blast furnace model. The effect of ferrocoke on the reduction of reducing agent rate and carbon rate of blast furnace was investigated with the mathematical blast furnace model.The effect of ferrocoke on the reduction of reducing agent rate and carbon rate depends on the ore/coke distribution of burden and operational conditions of blast furnace. High reducible sinter is required for the reduction of reducing agent rate of blast furnace by charging alarge quantity of ferrocoke into blast furnaces. The gasification degree of ferrocoke calculated by the mathematical blast furnace model agreed well with the experimental results.