鞍钢炉料冶金性能动态热模拟试验研究

来源期刊：钢铁2010年第8期

论文作者：于淑娟 刘万山 王向锋 于素荣 侯洪宇 张立国

文章页码：7 - 11

关键词：球团矿； 膨胀； 熔滴； 热模拟； 高炉

Key words：pellet； expansion； melting and dripping； thermal simulation； blast furnace(BF)

摘    要：按球团矿在鞍钢2 580 m³高炉内不同高度位置的温度条件、气氛及停留时间,在实验室动态模拟了炉料在高炉内的升温还原变化过程。通过球团升温还原膨胀试验、不同温度下恒温还原试验和900℃标准检测结果对比分析,得出了在高炉条件下的还原膨胀率低于检验标准的900℃膨胀率;鞍钢球团矿还原膨胀在正常范围内,但对弓一球团还原膨胀也应引起重视。鞍钢高炉使用酸性球团矿的配比在20%~30%时,熔滴性能相差不大。高炉使用球团矿比例由25%提高到30%后,炉况波动的主要原因不在于球团矿比例增加。通过生产一定镁或钙含量的球团均可降低球团矿还原膨胀及改善熔滴性能,从而可提高球团矿使用比例。

Abstract: According to the temperature,atmosphere and residence time of the pellets at different position in Ansteel 2580 m³ BF,hot and dynamic test of the burden was carried out to simulate the reduction process with temperature in laboratory.The results show that the reduction expansion under BF condition is lower than the standard expansion at 900℃ through reduction test at different temperature.The reduction expansion of Ansteel pellets are in the normal range,but the reduction expansion of Gongyi pellets should be paid more attention.The melting and dripping properties of burden is relative steady under 20%-30% of the acid pellets,and the pellet ratio increasing is not the reason for bad BF conditions under 25%-30% of acid pellet.The pellet with a certain ratio of Ca or Mg can decrease the swelling-reduction ratio and improve the melting and dripping properties,as will be helpful to enhance the ratio of pellet.