Abstract:Process design, equipment selection, investment estimate and technical and economic comparison between HPGR final grinding and traditional crushing-ball mill process were conducted for a copper mine in Pakistan. The results indicate that HPGR final grinding process is longer, with more equipments and installation power comparing to traditional crushing-ball mill process. The investment of HPGR final grinding process is 10874 thousand dollar higher than that of traditional crushing-ball mill process. Energy consumption of HPGR final grinding process is higher than that of traditional crushing-ball mill process, but the operating cost of HPGR final grinding process lower, because no steel ball and ball mill liner consumed. Annual operating revenue and net profit of HPGR final grinding process are 4398.7 and 4601.2 thousand dollar higher than that of traditional crushing-ball mill process. In the long run, HPGR final grinding process can generate more better economic benefits for this copper mine, which has better industrial application value.
