鞍山式赤铁矿预选粗精矿悬浮态磁化焙烧—磁选试验研究

来源期刊:中南大学学报(自然科学版)2018年第4期

论文作者:韩跃新 余建文 李艳军 高鹏

文章页码:771 - 779

关键词:鞍山式赤铁矿;预选精矿;悬浮态磁化焙烧;磁选

Key words:Anshan-type hematite iron ores; preconcentrate; suspension magnetization roasting; magnetic separation

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。

Abstract: Magnetization roasting via a laboratory-batch scale fluidized reactor was carried out for the utilization of crude concentrate from an Anshan-type hematite ore, which was 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.

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