某超贫磁铁矿陶瓷介质搅拌磨机细磨试验  

Experiment on Fine Grinding of An Ultra-lean Magnetite By Ceramic Medium Stirring Mill

作　　者：胡佛明 陈于海 桂志海 吴国军 常军 李仲文 HU Foming;CHEN Yuhai;GUI Zhihai;WU Guojun;CHANG Jun;LI Zhongwen(Nanshan Mining Co.,Ltd.,Anhui Masteel Mining Resources Group)

机构地区：[1]安徽马钢矿业资源集团南山矿业有限公司

出　　处：《现代矿业》2023年第7期177-182,共6页Modern Mining

摘　　要：安徽某超贫磁铁矿原矿品位13.69%,为了低碳、高效回收利用该矿石,针对其常规碎磨解离工艺能耗过高的问题,采用陶瓷介质搅拌磨机细磨,进行了介质尺寸、搅拌强度、充填率、磨矿浓度、料球比、磨矿时间与磨矿效果和分选指标之间的相关性研究。试验结果表明:在陶瓷介质尺寸7 mm、搅拌速度850 r/min、填充率80%、磨矿浓度65%、料球比0.9及磨矿时间19 min的较佳工艺参数下,获得了铁精矿品位65.89%、铁回收率87.98%的选别指标;在该工艺条件下,单位能耗为10.16(kW·h)/t,较经典工艺两段或三段细磨作业降低能耗26.75%以上,为超贫磁铁矿的高效开发综合利用提供了重要指导。The raw ore grade of an ultra-lean magnetite in Anhui is 13.69%.In order to recycle the ore with low carbon and high efficiency,aiming at the problem of high energy consumption in the conventional crushing grinding dissociation process,the ceramic medium stirring mill was used for fine grinding.The correlation analysis among medium size,stirring intensity,filling rate,grinding concentration,pellet ratio,grinding time,grinding effect and separation index were studied.The results showed that the iron concentrate with iron grade of 65.89%and iron recovery rate of 87.98%was obtained under the optimum process parameters of ceramic medium size of 7 mm,stirring speed of 850 r/min,filling rate of 80%,grinding concentration of 65%,pellet ratio of 0.9 and grinding time of 19 min.Under the process condition,the unit energy consumption is 10.16(kW·h)/t,which is more than 26.75%lower than that of the classical two stage or three-stage fine grinding operation process.The study provides important guidance for the efficient development and comprehensive utilization of ultra-lean magnetite.

关 键 词：超贫磁铁矿 陶瓷介质 搅拌磨机 节能降耗 磨矿 

分 类 号：TD951[矿业工程—选矿] TD921.4