从地下开采出来的矿石叫做原矿,原矿一般都由有用矿物和脉石组成。原矿的品位一般都比较低,不能直接进行冶炼,需要进行分选,除去其中大部分脉石与有害杂质,提高有用矿物的成分,供冶炼用。对原矿进行分选富集有用矿物的过程叫做选矿。例如:黑钨矿石一般含有大量的脉石。如石英,经过选矿除去大量的石英之类的 The ore mined from the ground is called raw ore, which is generally composed of useful minerals and gangue. Raw ore grade is generally relatively low, can not be directly smelting, the need for sorting, remove most of them gangue and harmful impurities, improve the composition of useful minerals for smelting purposes. The process of sorting and enriching the raw ore is called beneficiation. For example: Wolframite ore generally contains a large number of gangue. Such as quartz, after processing to remove a large number of quartz and the like