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作 者:曹进成[1,2] 韩跃新 刘磊[1,2] 曹飞[1,2] CAO Jincheng;HAN Yuexin;LIU lei;CAO Fei(Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,China Geological Survey,Zhengzhou 450006,Henan,China;Key Laboratory for Polymetallic Ores'Evaluation and Utilization,MNR,Zhengzhou 450006,Henan,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,Liaoning,China)
机构地区:[1]中国地质科学院郑州矿产综合利用研究所,河南郑州450006 [2]自然资源部多金属矿综合利用评价重点实验室,河南郑州450006 [3]东北大学资源与土木工程学院,辽宁沈阳110819
出 处:《矿产保护与利用》2023年第3期105-111,共7页Conservation and Utilization of Mineral Resources
基 金:中国地质调查局地质调查项目(DD20221698,DD20190401)。
摘 要:与传统破碎设备相比,高压辊磨机具有破碎效率高、单位能耗低、所得产品可直接进行粗粒抛尾的优点。以齐大山贫赤铁矿石为实验原料,分别考察了高压辊磨机和圆锥破碎机破碎产品的磨矿产品粒度分布、磨矿技术效率、Bond球磨功指数,以对比不同破碎产品的磨矿性能。结果表明,在相同磨矿条件下,与圆锥破碎产品相比,高压辊磨产品的后续磨矿产品中粗粒级含量减少,细粒级含量增加,磨矿时间为9 min时,+0.15 mm粒级减少9.41百分点,-0.031 mm粒级增加6.45百分点;磨矿产品中-0.074 mm粒级含量低于70%时,磨矿技术效率有所偏低,-0.074 mm粒级含量达到80%及以上时,磨矿技术效率略高。高压辊磨产品的磨矿能耗显著低于圆锥破碎产品,控制不同筛孔尺寸下,高压辊磨产品的Bond球磨功指数较圆锥破碎产品低2.74%~10.84%。本研究成果对高压辊磨机在矿石粉碎中的应用有一定的指导意义。Compared with the traditional crushing equipments,the high-pressure roller mill(HPGR)has the advantages of high crushing efficiency,low unit energy consumption,and directly discarding tailings for grinding products.Taking the Qidashan lean hematite ore as the raw materials,the particle size distribution of grinding products,grinding technical efficiency,and Bond work index of ball mill of HPGR products and cone crushing(CC)products were investigated to compare the grinding performance of different crushing products.The results showed that compared with CC,the content of coarse particles in the follow-up grinding products decreased and the content of fine particles increased using HPGR under the same grinding conditions.The+0.15 mm size fraction decreased 9.41 percentage points after 9 min grinding,while the−0.031 mm increased 6.45 percentage points When the content of−0.074 mm particles in grinding products was lower than 70%,the grinding technical efficiency of HPGR products was lower than that of CC products.When the content of−0.074 mm particles in grinding products reached 80%or above,the grinding technical efficiency of HPGR products was slightly higher than that of CC products.The energy consumption of HPGR products was obviously lower than that of CC products.The Bond work index of ball mill of HPGR products was 2.74 to 10.84 percentage lower than that of CC products under different control sieve size conditions.This study provides a guidance for the HPGR application in ore comminution.
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