化学提纯是利用化学作用将矿石中的有用成分提取出来,或者将矿石或矿物中的有害杂质除去的方法,这种方法可以起到机械选矿方法难以达到的效果,但成本相对较高。化学提纯法包括以下方法: 焙烧、酸碱处理、浸出、溶剂萃绝缘性等。
答:先要精选,再制砂后,经磁选、浮选或化学提纯后,二氧化硅能达到95%。
Answer: want first choice, remaking sand, through the magnetic separation, flotation or chemical purification, silica be 95 percent.
作为一种化学原料,它也被用于制造杀虫剂、提纯水、净化污水和制氨。
As a chemical it's also used in insecticides, water purification, sewage treatment and the production of ammonia.
如果你在做有机化学,想要提纯一些东西,这是很痛苦的?
If you're doing organic chemistry, and you're trying to purify things, this is a real pain, right?
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