为了得到有价材料,矿物原料常常要粉碎,而为此所需的基建费用和生产费用是可观的,尤其是电能的消耗和设备的磨损相当大。不但在选矿工业,而且在其他工业部门如像在建筑材料工业、木材工业、食品工业以及化学和制药工业都装置有大量的破碎和磨矿。粉碎的电耗很高,全世界生产的电能 In order to get valuable materials, mineral raw materials are often crushed, and infrastructure and production costs are substantial for this purpose, especially the consumption of electrical energy and the considerable wear on equipment. There is a great deal of crushing and grinding not only in the mineral processing industry but also in other industrial sectors such as the building materials industry, the timber industry, the food industry and the chemical and pharmaceutical industries. Crushed power consumption is high, the world’s production of electricity