炼焦精煤质量的好坏是影响炼铁生产和节能的重要因素,据冶金工业部提供的资料,炼焦精煤灰分增减1％,影响焦炭灰分1.3％。焦炭灰分高低,直接影响排渣量、石灰石用量、高炉燃料比和产量的增减。大体的规律是:焦炭灰分升高1％燃料比升高2％,铁产量下降2～3％。因此,国家经委领导指出:“降低炼铁用煤的灰分,列钢铁工 According to the information provided by the Ministry of Metallurgical Industry, the ash content of coking coal increases or decreases by 1%, affecting 1.3% of the coke ash content. Coke ash level, a direct impact on the amount of slagging, limestone use, blast furnace fuel ratio and output increase or decrease. The general rule is: 1% higher coke ash fuel ratio increased by 2%, iron production decreased by 2 to 3%. Therefore, the leadership of the State Economic Commission pointed out: "Reduce the ash content of ironmaking coal, column iron and steel workers