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最初,人们为了获取矿物资源,只是运用原始的生产方式,从事简单的锤矿和淘金作业,以后通过长时期的生产实践和科学试验,才逐步发展为一门比较完整的科学——选矿学。人们利用这门科学,向自然界获取了所需要的各种矿物资源。但是,在这一门科学中,无论是破碎、磨矿、筛分分级还是选别方法及其辅助作业,从力学的观点来看,重力始终占着主导地位。由于重力加速度在一定范围内的不变性,以致人们为了提高工作(选矿)效率,只好使各种选矿设备日趋大型化、复杂化。
Initially, in order to obtain mineral resources, people simply used primitive methods of production and engaged in simple hammer and gold-mining operations. Only after a long period of production practice and scientific experiments were they gradually developing into a relatively complete science, mineral processing science. People use this science to acquire the various mineral resources that nature needs. However, in this science, from the mechanics point of view, gravity always dominates in this field of science, whether crushing, grinding, sizing or sorting methods and their auxiliary work. Due to the invariance of gravitational acceleration in a certain range, people have to make various ore dressing equipment increasingly large and complicated in order to enhance the efficiency of work (dressing).