基于破碎马氏链模型的最佳入磨粒度  

Optimal grain size based on broken Markov chain model

作　　者：姜志宏[1] 李恒 姜晓锋 刘钢湘 JIANG Zhihong;LI Heng;JIANG Xiaofeng;LIU Gangxiang(School of Mechanical and Electrical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Chalco Mining Henan Branch,Zhengzhou 450000,China)

机构地区：[1]江西理工大学机电工程学院,江西赣州341000 [2]中铝矿业河南分公司,河南郑州450000

出　　处：《中国粉体技术》2021年第2期9-16,共8页China Powder Science and Technology

基　　金：国家自然科学基金项目,编号:51464017。

摘　　要：针对制样中原矿粒度介于10~<50 mm,研磨最终粒度为<0.074 mm、合格率P0.074需达到90%以上的碎磨阶段的工况要求,根据传统的2C-HPGRB流程,结合马尔科夫理论,建立两段全闭路流程破碎马氏链模型,并依此以钨矿制样为例进行碎磨流程方案优选。结果表明:3次颚破、2次辊破返矿、40 min磨矿为制取某种钨矿矿样的最佳方案,对应的最佳入磨粒度为<0.5 mm。According to the working condition requirements of the crushing and grinding stage in the sample preparation,which the particle size of the original ore was between 10 ~ < 50 mm,the final particle size of the grinding is < 0. 074 mm,and the pass rate P0. 074 must reach more than 90%,combined with the traditional 2 C-HPGRB and Markov theory,a two-stage fully closed circuit broken Markov chain model was established,and then the crushing process program was optimized,taking tungsten sample as an example. The results show that 3 jaw breaks,2 roll breaks return to ore and 40 min ore grinding are the best way to prepare a kind of tungsten ore sample,and the corresponding optimal grinding particle size is < 0. 5 mm.

关 键 词：碎磨 入磨粒度 制样工艺 马氏链 马尔科夫理论 颚破 辊破 

分 类 号：TD95[矿业工程—选矿]