鞍山式赤铁矿石球磨磨矿动力学研究  

Grinding Kinetics of Anshan Type Hematite Ores in a Ball Mill

作　　者：曹进成[1] 刘磊[2,3] 韩跃新[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]国土资源部多金属矿评价与综合利用重点实验室,河南郑州450006 [3]中国地质科学院郑州矿产综合利用研究所,河南郑州450006

出　　处：《东北大学学报（自然科学版）》2016年第12期1764-1767,1777,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51304175);国家高技术研究发展计划项目(2012AA03A508)

摘　　要：应用MATLAB软件对鞍山式赤铁矿磨矿瞬时速度进行研究.矿料在球磨过程中经历＂粗粒级快速碎磨-中粒级动态碎磨-中粒级单一碎磨＂三个固有阶段.0.043-0.031 mm粒级比0.105-0.043 mm粒级更早进入动态碎磨状态,容易出现细粒级过粉碎.与圆锥破碎机产品相比,高压辊磨机产品在磨矿中各阶段的转折时间显著缩短,但会更早出现细粒级过粉碎.生产中通过提高高压辊磨机产品的入磨量来缩短球磨时间,在提高选厂的处理能力的同时减弱排矿产品细粒级过粉碎.Grinding specific rate of Anshan type hematite ores was analyzed using MATLAB software. Test results showed that breakage of ore particles in the grinding process went through three inherent stages： rapid grinding of coarse size fraction,dynamic grinding of middle size fraction and single grinding of middle size fraction. Particles in 0. 043 - 0. 031 mm size fraction went into dynamitic grinding stage earlier than particles in 0. 105 - 0. 043 mm size fraction,and then overgrinding of fines occurred easily in ball mill. Compared with cone crusher products,HPGR（ high pressure grinding rolls） products had significantly shorter turning time points in three breakage stages,which means that HPGR products were ground faster with earlier occurrence of overgrinding. Given this, the increase of HPGR product tonnages into mills shortened the residence time of materials in ball mill,not only improving the capacity of mineral processing plants but also weakening overgrinding of fines.

关 键 词：高压辊磨机 圆锥破碎机 磨矿动力学 磨矿瞬时速度 碎磨阶段 

分 类 号：TD921[矿业工程—选矿]