1.选矿厂所处理的原矿往往是大块矿石,需要进行破碎和磨矿使有用矿物从无用的脉石中解离出来,然后我们就可以利用某些矿物性质用物理选矿方法将有用矿物分选出来。正如你们所预料的,在矿物工业中,总的趋势是原矿品位降低并且需要细磨才能使有用矿物单体解离。磨至较细的粒度需要更多的能量,因此我们可以预料生产每吨精矿的钢球损耗也会与能耗一起增加。 2.在明尼苏达,我们曾经拥有8座团矿厂,而现在我们应该说有7座,因为我们去年六月关闭了Butler铁燧岩团矿厂。7座团矿厂总计年产量可达6500万吨。但是钢铁厂大约仅能处理上述数字的一半,所以团矿产 1. The ore mined at the concentrator is often large in size and needs to be crushed and milled to dissociate useful minerals from unwanted gangue, and then we can use some of the mineral properties to separate the useful minerals Elected. As you might expect, the general trend in the mineral industry is that ore grade is reduced and fine grinding is needed to dissociate useful mineral units. Mill to finer grain size requires more energy, so we can expect that the ball loss per ton of concentrate produced will also increase with energy consumption. 2. In Minnesota, we used to have 8 mines, and now we should say 7 because we closed the Butler Taconite mines in June last year. 7 pellets total annual output of up to 65 million tons. However, the steel plant can handle only about half of the above figures, so the group mines