粗粒矿石的拣选可以下定义为用物理分选方法,即将长度和宽度都大于9.5毫米的矿粒混合物,分选成两种或更多种的、品位比整个矿石的品位高的产品。拣选是最早出现的选矿方法,在数千年以前,它就已经被当时的冶金工人所采用。电子拣选装置是第二次世界大战后不久才第一次生产出来。 The sorting of coarse ore can be defined as a physical sorting method that separates a mixture of ore particles greater than 9.5 mm in length and width into two or more products of a grade higher than that of the entire ore. Picking was the earliest beneficiation method that had been adopted by the then metallurgists thousands of years ago. The electronic sorting device was first produced shortly after World War II.