袁家村铁矿闪石型磁铁矿高压辊磨及阶磨阶选工艺技术研究  

High Pressure Grinding Roll Combined with Staged⁃Grinding and Staged⁃Separation Technology for Amphibolite⁃Type Magnetite in Yuanjiacun Iron Mine

作　　者：李贤 罗良飞[2] 钟志刚 李宗蔚 张虎 LI Xian;LUO Liangfei;ZHONG Zhigang;LI Zongwei;ZHANG Hu(Lan County Mining Co Ltd,Taiyuan Iron&Steel(Group)Co Ltd,Lan County 030027,Shanxi,China;Changsha Research Institute of Mining&Metallurgy Co Ltd,Changsha 410012,Hunan,China;Chengdu Leejun Industrial Co Ltd,Chengdu 610045,Sichuan,China)

机构地区：[1]太钢集团岚县矿业有限公司,山西岚县030027 [2]长沙矿冶研究院有限责任公司,湖南长沙410012 [3]成都利君实业股份有限公司,四川成都610045

出　　处：《矿冶工程》2023年第3期93-96,共4页Mining and Metallurgical Engineering

摘　　要：对太钢袁家村铁矿闪石型磁铁矿进行了高压辊磨-预选及阶磨阶选工艺技术研究。为了降低入磨矿石选比,采用高压辊磨进行超细碎并对-3 mm粒级物料进行湿式预选,可以抛出产率22%的粗粒尾矿,预选精矿TFe品位提高到36%左右。高压辊磨前后矿样的磨矿功指数分别为11.91 kW·h/t和11.11 kW·h/t。高压辊磨-预选-阶磨阶选流程试验获得了精矿产率33.92%、TFe品位67.13%、回收率75.75%的指标,选比由2.95下降至2.27。高压辊磨-预选-阶磨阶选工艺为此类低品位磁铁矿大规模低成本开采提供了节能降耗新思路。The amphibolite⁃type magnetite ore in Yuanjiacun Iron Mine was processed adopting a processing technique consisting of high pressure grinding roll(HPGR)plus pre⁃concentration,followed by staged grinding and staged separation process.In order to reduce the grinding feed in the following concentration,HPGR was introduced for superfine crushing,and the obtained material in a size fraction of-3 mm was treated by a wet pre⁃concentration process,yielding 22%coarse tailings for discarding.And then a pre⁃concentration process resulted in the obtained concentrate with TFe grade up to around 36%.The work index for grinding before and after adopting HPGR was reduced from 11.91 kW·h/t to 11.11 kW·h/t.An experiment was performed with a flowsheet of HPGR plus pre⁃concentration followed by staged grinding and staged separation process,yielding 33.92%concentrate grading 67.13%TFe at 75.75%recovery,showing the ratio of concentration down to 2.27 from 2.95.It is concluded that the above⁃mentioned processing technique can provide an energy⁃conservation and consumption⁃reduction solution for large⁃scale and low⁃cost exploitation of similar low⁃grade magnetite mines.

关 键 词：磁铁矿 高压辊磨 预选 弱磁选 反浮选 阶磨阶选 袁家村铁矿 

分 类 号：TD92[矿业工程—选矿]