He also knows that big mining companies prefer mountains of low-gradeore to small, high-grade mines like his.
而且他也知道那些个大型矿产公司更喜欢那些低地势的矿山，而不是他那又小又高的。
2
With mining capacity continuous increase and with mine entering into deep mining stage, the grade of crude ore and the grindability of ore decrease that raise the cost of grinding.
随着矿山规模的不断扩大和进入深部开采，矿石的原矿品位和相对可磨度逐渐降低，磨矿成本随之升高。
3
From production practice of the mine, it is expounded that the decrease of dilution factor in mining is one of effective methods to improve the ore quality (grade) and economic benefits.