Preparation of blast furnace burdens by composite agglomeration process: effect of distribution of magnetite and hematite concentrates in pelletized and matrix feed
Preparation of blast furnace burdens by composite agglomeration process: effect of distribution of magnetite and hematite concentrates in pelletized and matrix feed
复制标题
采用复合造粒工艺制备高炉炉料：磁铁矿和赤铁矿精矿在球团和基质进料中分布的影响
DOI：
10.1007/s42243-020-00376-2
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发表时间：
2020-03-18
影响因子：
2.5
通讯作者：
Jiang, Tao
中科院分区：
文献类型：
--
作者：
Gu, Fo-quan;Zhang, Yuan-bo;Jiang, Tao
以两种不同细粒铁精矿（磁铁矿和赤铁矿）为原料，采用复合团聚工艺，探讨了铁精矿在球团和基质间的分布对制备高炉炉料的影响。研究发现，当混合饲料中铁精矿A（磁铁矿）与铁精矿B（赤铁矿）的质量比一定时，球团和基质饲料中铁精矿A的比例对CAP产品质量有显著影响。特别是，随着铁精矿A在球团饲料中所占比例由0增加到100%，产量由82.11%下降到79.19%，转鼓指数由71.33%下降到68.27%。矿化表征结果表明，当100%铁精矿A作为球团给料时，球团外层和内层的结晶方式不同，球团部分赤铁矿和磁铁矿相周围存在大量孔隙，球团与基体部分连接较弱，导致团聚产物强度较差。
Effect of distribution of iron concentrates between pelletized and matrix feed on the preparation of blast furnace burdens from two different kinds of fine iron concentrates (magnetite and hematite) by composite agglomeration process (CAP) was explored. It was found that when the mass ratio of iron concentrate A (magnetite) to iron concentrate B (hematite) in the mixed feed was constant, the proportion of iron concentrate A in the pelletized and matrix feed significantly affected the quality of CAP products. Particularly, as the proportion of iron concentrate A in the pelletized feed increased from 0 to 100%, the yield decreased from 82.11% to 79.19% and the tumbler index decreased from 71.33% to 68.27%. The mineralization characterization results indicated that when 100% iron concentrate A was used as the pelletized feed, the crystallization styles of the outer layer and the inner layer of the pellet were different, and a lot of pores exist around hematite and magnetite phases in the pelletized part, with the weak connection of pelletized and matrix part, resulting in poor strength of agglomeration product.