摘要
按球团矿在鞍钢2 580 m^3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。
According to the temperature,atmosphere and residence time of the pellets at different position in Ansteel 2580m3 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.
出处
《钢铁》
CAS
CSCD
北大核心
2010年第8期7-11,共5页
Iron and Steel
关键词
球团矿
膨胀
熔滴
热模拟
高炉
pellet
expansion
melting and dripping
thermal simulation
blast furnace（BF）
