某复杂难选铁矿石提铁降硅工艺研究  

Research on Technology for Iron-increase and Silicon-reduction of an Iron Ore

作　　者：董颖博[1,2] 林海[1,2] 傅开彬[1,2] 莫晓兰[1,2] 汪涵[1,2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]金属矿山高效开采与安全教育部重点实验室,北京100083

出　　处：《矿冶工程》2011年第6期36-38,共3页Mining and Metallurgical Engineering

摘　　要：对山西某难选高硅铁矿石进行了可选性试验研究。针对矿石嵌布粒度很细的特点,采用阶段磨矿阶段选别工艺提铁降硅。得出适宜的磨矿制度:一段磨矿粒度为-0.074 mm粒级占40%,二段磨矿粒度为-0.038 mm粒级占85%;对粗精矿再磨后的不同选别工艺进行了对比,推荐最佳的工艺为磁-浮联合选别,可获得全铁品位为65.37%、二氧化硅含量为4.26%的铁精矿,达到了较好的提铁降硅效果。Experiments were carried out to learn the beneficiability of a refractory iron ore from Shanxi Province. As the dissemination size of the minerals of this high-silicon ore is very small, a technique featuring stage grinding and stage separation was used. A feasible grinding system includes two stages, with the grinding fineness for the first stage as -0.074 mm of 40% and for the second stage, -O. 038 mm of 85%. Beneficiation approaches to treat the bulk concentrate were compared, and the best one should be the combined usage of magnetic separation and flotation, as the TFe grade of the as-prepared iron concentrate reached 65.37% , while the SiO2 content was reduced to be 4.26% , showing that the purpose to increase iron grade while reducing silicon content can be efficiently achieved.

关 键 词：难选铁矿 细粒嵌布 磁-浮联合工艺 磁选 浮选 提铁降硅 

分 类 号：TD953[矿业工程—选矿]