马坑磁铁矿石高压辊磨—湿式中磁预选—阶段磨选工艺试验  

Experiment of HPGR Crushing-wet Mid Intensity Magnetic Preconcentration-stage Grinding and Separation on a Magnetite Ore from Makeng

作　　者：裴晓东[1] 钱有军[1] 高莉[1] 

机构地区：[1]中钢集团安徽天源科技股份有限公司,安徽马鞍山243000

出　　处：《金属矿山》2016年第8期81-84,共4页Metal Mine

摘　　要：为探索采用高效碎磨工艺处理福建马坑铁矿石的可行性,进行了高压辊磨—湿式中磁预选—阶段磨选工艺流程试验。结果表明:较常规碎矿工艺,高压辊磨破碎获得的产品细粒级含量显著提高,能够满足湿式中磁预选的粒度要求;磨矿条件相同时,高压辊磨产品相对传统颚式破碎产品新生成-0.074 mm粒级含量高,相对可磨度高;高压辊磨产品(-5 mm)经湿式中磁预选—两阶段磨矿弱磁选,可在磨前抛出38.88%的合格尾矿,并可获得铁品位为66.75%、磁性铁品位为65.95%、铁回收率为80.21%、磁性铁回收率为96.25%的铁精矿,精矿铁品位较现场提高了2.66个百分点、铁回收率提高了0.30个百分点,可作为马坑铁矿节能降耗、提质增效改造设计的依据。To explore the feasibility of effective comminution process to deal with Makeng iron ore,Fujian,experiments of HPGR crushing-wet mid intensity magnetic preconcentration-stage grinding-magnetic technological of magnetite ore from Makeng,Fu Jian were conducted. The results show that HPGR product has more fine particles,compared with conventional comminution process,can satisfy the particle demand of wet mid intensity magnetic preconcentration. With the same grinding conditions,compared with conventional jaw crushed products,HPGR products has more new produced- 0. 074 mm fraction,relative grindability is higher. Iron concentrate with iron grade of 66. 75 %,iron recovery of 80. 21 %,magnetic iron grade of 65. 95 % and recovery of 96. 25 % was obtained via wet mid intensity magnetic preconcentration-two stage grinding low intensity magnetic separation process on HPGR products（- 5 mm）. Compared with the original process,the grade of iron concentrate increased by 2. 66 percentage points compared with on-site process,iron recovery increased by 0. 30 percentage points,and can throw out38. 88 % qualified tailings. More crushing less grinding aim was realized,offers technique basis for transformation on saving energy and quality and efficiency for Makeng iron mine.

关 键 词：高压辊磨 磁铁矿石 高效碎磨工艺 湿式预选 

分 类 号：TD921.7[矿业工程—选矿]