1 前言高还原性烧结矿是高炉冶炼的理想精料。随着600mm料层低温烧结工艺的实现,在二烧50m~2烧结机上生产高还原性烧结矿的时机已经成熟。1999年3月开始,在碱度不提高的条件下,烧结厂逐步将烧结矿品位从53%提高到55%以上;SiO_2含量由6.3%～6.5%下降到5.5%～5.7%;FeO值也由6.5%～6.8%下降到 1 Introduction Highly reducing sinter is the ideal concentrate for blast furnace smelting. With the realization of low temperature sintering process of 600mm material layer, the timing of producing high reductive sinter on the second sintering 50m ~ 2 sintering machine has matured. Starting from March 1999, the sinter gradually increased the grade of sinter from 53% to over 55% under the condition of not increasing alkalinity; the content of SiO_2 decreased from 6.3% to 6.5% to 5.5% -5.7%; the value of FeO also From 6.5% to 6.8% down to