人们在开始用机械破碎岩石的时候,就想到用岩石破碎岩石,现在叫做自破碎。19世纪20～30年代,就有了使用这种方法的机器的专利。但最终只剩下瀑落式自磨机,它利用石块在转鼓内翻滚进行破碎,它是由砾磨机利用大块硬岩石破碎软物料演变而来,就象钢球在球磨机中那样。半自磨机是瀑落式自磨机,添加少 When people begin to crush rock by mechanics, they think of rock crushed, now called self-crushing. From the 1930s to the 1930s, there was a patent for machines that used this method. But in the end only the fall-self mill, which uses stones to tumble within the drum, is broken up by a pebble mill using large, hard rock fragments of soft material, just as balls are in a ball mill . Semi-self-mill is a waterfall from the mill, add less