攀枝花钒钛铁精矿球团还原膨胀试验研究

Study on the Reduction Swellability of Panzhihua V-Ti bearing magnetite Concentrate Pellets

运用球团形貌在线监测试验装置监测并研究了粘结剂含量及焙烧气氛对球团还原膨胀率的影响。结果表明:在温度1 100～1 200℃下,将添加了小于1.5%膨润土的攀枝花钒钛铁精矿球团进行磁化焙烧,所得球团还原时的最大线膨胀率小于5%,球团矿不粉化,利于高炉冶炼顺行。

The effect of the binder content and the calcination atmosphere on the reduction swellability of the pellets is monitored by the on-line pellet morphology detector.The research results show that by adding a small amount of binder（the bentonite content is less than 1.5%） to the Panzhihua V-Ti bearing magnetite concentrate,the resulting pellets could meet the requirements of the blast furnace after magnetizing roasting in temperature of 1 100~1 200 ℃,with a maximum linear expansion rate of less than 5% during reduction.The pellets which are not pulverized contribute to the smooth operation of blast furnace.