【摘要】 颗粒床压载粉碎是高压辊磨机粉碎矿石的主要作用机制。利用活塞-缸体压载装置进行了将高压辊磨机作为终磨设备对某硫化铜矿石的粉碎及铜矿物解离效果影响的模拟试验研究,包括窄粒级颗粒床压载粉碎试验和宽粒级颗粒床压载粉碎闭路试验,并将闭路试验结果与球磨磨矿闭路试验结果进行了比较。窄粒级试验给矿为2 360/3 350 mm粒级的物料,宽粒级试验给矿为0/3 350 mm粒级的物料。粉碎产物中铜矿物的解离分析采用BPMA型工艺矿物学参数自动分析仪完成。根据试验结果从产物粒度分布、铜金属的粒级分布、铜矿物粒度和颗粒含量分布、铜矿物粒级解离度及铜矿物整体解离度等方面讨论了压载强度及粉碎方法对铜矿物解离效果的影响。更多还原

【Abstract】 Particle-bed compressive stressing is the main work mechanism of comminution by HPGR. An experimental study on comminution and mineral liberation of a copper sulfide ore was carried out by compressive stressing of particle-bed in a piston-die rig to simulate the situation of comminution using HPGR as the finalgrinding device. The tests carried out included compressive comminution tests on particle-bed with narrow-size feed,and the locked-cycle comminution test on particle-bed with broad-size feed,which was then compared to a corresponding locked-cycle test of ball-mill grinding. The narrow-size feed is made up of particles in the size range2 360/3 350 mm,whereas the broad-size feed of particles in the size range 0/3 350 mm. The liberation analysis for copper-mineral in the comminution products was accomplished using BPMA system-an automatic mineral liberation analyzer developed by BGRIMM. The influences of the stressing intensity and the method of comminution on the copper mineral liberation are discussed in terms of product size distribution,copper-metal deportation among size classes,distribution of copper mineral among particle-size and particle-grade classes,degree of mineral liberation in size class as well as degree of mineral liberation overall.更多还原