Small Scale Copper Hode Plant

Machinery industry has shown relatively stable growth on account of the three as follows first, most of the metal ores have been mined for half a century or even longer, so the ore grade declines year by year.For example, the copper ore grade was 0.91 in 1985, but it falls to below 0.75 in 2012 it is expected to drop to 0.70 in 2015.Get price.