中南大学学报（自然科学版）2018，Vol.49Issue(1)：8-14,7.DOI:10.11817/j.issn.1672-7207.2018.01.002
高压辊磨操作参数对磁铁矿石球磨功指数的影响
Influence of operating parameters of high pressure grinding rolls on bond work index of ball mill of magnetite ore
摘要
Abstract
Magnetite ore from Gongchangling was crushed by high pressure grinding rolls (HPGR) and jaw crusher (JC). The size characteristic of the products crushed by different crushing manners was analyzed, the Bond work indexes of ball mill by different crushing manners of different target particle sizes were measured, and the influence of Bond work indexes of ball mill of the products crushed by HPGR at different roll surface pressure and JC were studied. The results show that the fine fraction content of crushed products by HPGR is more than that produced by jaw crusher, and the particle size distribution of the product crushed by HPGR at the roll surface pressure of 4.5 and 5.5 N/mm2 is more uniform. When mass fraction of grinding product smaller than 0.074 mm is 65％, Bond work index of ball mill of the products crushed by HPGR at roll surface pressure of 2.5, 3.5, 4.5, 5.5, and 6.5 N/mm2 decreases, compared with that crushed by JC, respectively by 11.36％, 21.38％, 15.62％, 22.59％, and 27.49％. On the other hand, presence of 40％ by weight instead of 65％ of grinding product finer than 0.074 mm affected the decreasing value to be about 18.49％, 27.61％, 22.69％, 30.37％, and 35.08％, respectively. Reduction amplitudes of latter are lower than those of former by 7.13％, 6.23％, 7.07％, 7.87％ and 7.59％, respectively. The biggest reduction amplitude is the product crushed by HPGR at the roll surface pressure of 5.5 and 6.5 N/mm2. Furthermore, the energy saving of coarse grinding is significantly higher than that of finer grinding.关键词
高压辊磨机/颚式破碎机/磁铁矿石/Bond球磨功指数/粒度特性Key words
high pressure grinding rolls/jaw crusher/magnetite ore/Bond work index of ball mill/size characteristic分类
矿业与冶金引用本文复制引用
侯英,徐亦元,杨洪英,姚金,吴中贤,张旭..高压辊磨操作参数对磁铁矿石球磨功指数的影响[J].中南大学学报（自然科学版）,2018,49(1):8-14,7.基金项目
国家自然科学基金资助项目(51504053) （51504053）
辽宁省教育厅项目(2016TSPY12) （2016TSPY12）
鞍山市科技计划项目(110000144) （110000144）
辽宁科技大学青年基金资助项目(2015QN13) (Project(51504053) supported by the National Natural Science Foundation of China （2015QN13）
Project (2016TSPY12) supported by the Education Department of Liaoning Province （2016TSPY12）
Project(110000144) supported by the Science and Technology Department of Anshan City （110000144）
Project(2015QN13) supported by University of Science and Technology Liaoning Province) （2015QN13）
