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.
作者
李贤
罗良飞
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)
出处
《矿冶工程》
CAS
CSCD
北大核心
2019年第6期57-61,共5页
Mining and Metallurgical Engineering
关键词
袁家村铁矿
流程考查
磁选
浮选
球磨
Yuanjiacun Iron Mine
flowsheet investigation
magnetic separation
flotation
ball milling
