鞍山式赤铁矿预选粗精矿悬浮态磁化焙烧—磁选试验研究

摘要

采用实验室间歇式悬浮态反应炉作为磁化焙烧装置,以高纯N2和H2的混合气体作为还原气体,考察450~700℃下某鞍山式赤铁矿预选粗精矿磁化焙烧—磁选的影响因素.研究结果表明:在气体流量为8 m3/h、反应温度为650℃、H2体积分数为40%及物料循环3次的条件下,焙烧物料经磁场强度80 kA/m的戴维斯磁选管分选后,可获得Fe质量分数为65.46%、回收率88.10%的优质铁精矿.%Magnetization roasting via a laboratory-batch scale fluidized reactor was carried out for the utilization of crude concentrate from an Anshan-type hematite ore, whichwas performed at 450?700℃ in mixed H2 and N2 atmosphere. The results show that the gas flow is 8 m3/h, the roasting temperature is 650℃, the hydrogen volume fraction is 40% and the material cycles is 3, and a high grade concentrate containing 65.46% iron with an iron recovery of 88.10% is achieved by magnetic separation with a magnetic field strength of 80 kA/m under above conditions.