Study of Parameters Which Influence the Energy Utilization Efficiency in the Grinding of Gabbro Ores

摘要

An investigation of the possibility of improving the grinding characteristics of gabbro ore containing copper and nickel sulfides through a thermal shock treatment technique was conducted. The results indicate that the breakage characteristics of the gabbro ore particles can be significantly improved by preheating the ore particles to a temperature around 400C followed by rapid water quenching. For a given power input and feed size, the thermally treated material produces a product of much finer distribution than untreated material. An assessment of the improvement in grindability was made by calculating feed size selection functions for untreated and heat-treated materials.