钢球级配对铁矿石的磨矿动力学研究  

Effect of Ball Size Distribution on Grinding Dynamics of Iron Ore Particles

作　　者：吴桂义 安站东 薛钢琴 李同清[1,2] 尹自信 常向东[1,2] WU Guiyi;AN Zhandong;XUE Gangqin;LI Tongqing;YIN Zixin;CHANG Xiangdong(School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, China;Jiangsu Key Laboratory of Mine Mechanical and Electrical Equipment, China University of Mining ＆ Technology, Xuzhou 221116, China;Department of Electromechanical Power, Yangquan Coal Industry （Group） CO. ,LTD , Yangquan 045000, China)

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221116 [2]中国矿业大学江苏省矿山机电装备重点实验室,江苏徐州221116 [3]阳煤集团机电动力部,山西阳泉045000

出　　处：《有色金属工程》2018年第3期95-99,共5页Nonferrous Metals Engineering

基　　金：国家自然科学基金资助项目(51475458);江苏省六大人才高峰项目(ZBZZ-045)

摘　　要：以4种不同级配(m40∶m30∶m20=1∶1∶1、1∶1∶3、1∶3∶1、3∶1∶1)的钢球为研究对象,基于总体平衡模型开展磨矿动力学试验,研究了不同钢球级配对铁矿石的破碎规律,确定了5种单粒级(-13.2+9.5、-6.5+4.75、-3.35+2.36、-1.7+1.18、-0.6+0.425 mm)矿石在不同钢球级配下的比破碎速率。结果表明,铁矿石破碎规律不符合一阶磨矿动力学,比破碎速率随磨矿时间的增加而减小;级配为3∶1∶1的钢球对-13.2+9.5、-6.5+4.75 mm粒级矿石的破碎效果优于其他级配的破碎效果;级配为1∶1∶3的钢球在给料粒度大于3.35 mm时磨矿效果较差,在给料粒度小于1.7 mm时磨矿效果最好。To determine the effect of the ball size distribution on the breakage behavior of iron ore, five kind of mono-size particles （ - 13.2 ＋ 9.5, - 6.5 ＋ 4.75, - 3.35 ＋ 2.36, - 1.7 ＋ 1. 18, - 0.6 ＋ 0. 425 mm） were used with four ball size distributions （ m40 ： m30 ： m20 = 1 ： 1 ： 1,1 ： 1 ： 3,1 ： 3 ： 1,3 ： 1 ： 1 ）. The specific breakage rates were determined. Results show that the behavior of iron ore breakage didn＇t accord with the first-order grinding dynamics, and specific breakage rate decreased with the increase of time. The grinding performance of - 13.2 ＋9.5, -6.5 ＋4.75 mm was the best using the ball size distribution of 3：1 ： 1. The grinding performance of the ball size distribution of 1 ： 1 ： 3 was the worst when the ore particles size was more than 3.35 mm. While the grinding performance was the best when the ore particles size was less than 1.7 mm.

关 键 词：磨矿动力学 比破碎速率 钢球级配 

分 类 号：TD921[矿业工程—选矿]