JIANG Zhihong1， LI Heng1， JIANG Xiaofeng1， LIU Gangxiang2
(1. School of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology,Ganzhou 341000, China；2.Chalco Mining Henan Branch, Zhengzhou 450000, China)
Abstract: 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 2C-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.
Keywords: crushing; grinding size; sample preparation process; Markov chain; Markov theory; jaw break; roll break
中图分类号：TD95
文献标志码：A
文章编号：1008-5548(2021)02-0009-08
DOI:10.13732/j.issn.1008-5548.2021.02.002
收稿日期： 2020-09-07， 修回日期：2020-10-06，在线出版时间：2020-12-22 16:09。
基金项目：国家自然科学基金项目，编号：51464017。
第一作者简介：姜志宏(1977—),男，副教授，硕士生导师，研究方向为机械系统动力学。E-mail: 272235681@qq.com。
通信作者简介：李恒(1995—),男，硕士研究生，研究方向为矿山机械矿物加工。E-mail: 841878546@qq.com。
