袁家村铁矿选厂流程考查与分析  

Investigation and Analysis of Processing Flowsheet of Yuanjiacun Iron Mine

作　　者：李贤 罗良飞[2] LI Xian;LUO Liang⁃fei(Lanxian Mining Co Ltd,TISCO,Lan County 030027,Shanxi,China;Changsha Research Institute of Mining and Metallurgy Co Ltd,Changsha 410012,Hunan,China)

机构地区：[1]岚县矿业有限公司,山西岚县030027 [2]长沙矿冶研究院有限责任公司,湖南长沙410012

出　　处：《矿冶工程》2019年第6期57-61,共5页Mining and Metallurgical Engineering

摘　　要：对太钢袁家村铁矿2200万吨/年选矿厂进行了流程考查。考查结果表明,选矿厂基本达到了设计产能,铁精矿品位65.10%,但回收率略低于设计指标;半自磨与球磨指标基本达到设计指标,原矿处理量931.54 t/h(干基),但存在球磨、再磨与分级效率低,溢流粒度组成不合理,过磨严重等问题;磁选-0.020 mm粒级回收率低;浮选各粒级回收率普遍低于磁选;磨矿分级优化空间较大,通过优化入选粒度组成可以提高各粒级的金属回收率。The flowsheet of the 22-million-t/a concentrator in Yuanjiacun Iron Mine was examined.It is found that the concentrator almost achieves its designed capacity,with the produced iron concentrate approaching 65.10%Fe grade,but the recovery lower than the desired value.During the processing of 931.54 t/h raw ore,semi-autogenous grinding and ball milling processes can almost reach the designed index.But it is shown there exist the following problems:lower efficiencies in terms of ball milling,regrinding and classification;inappropriate size distribution for the overflow and serious overgrinding;lower iron recovery from the magnetic separation of-0.020 mm fraction;generally lower recovery from the flotation of all size fractions compared to magnetic separation.It is essential to further optimize the grinding-classification processes,and the metal recovery of varied size fractions can be increased by optimizing the size fractions of the feed pulp.

关 键 词：袁家村铁矿 流程考查 磁选 浮选 球磨 

分 类 号：TD9[矿业工程—选矿]