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河北铜矿的矿石大部分是磁性矿物,磁铁矿(Fe_3O_4)品位一般为30％左右。坑内采矿作业中常有一些金属铁器夹杂在矿石中,如钎头、
Most of the ore in Hebei Copper Mine is magnetic minerals, magnetite (Fe_3O_4) grade is generally about 30%. Pit mining operations are often some metal inclusions in the ore, such as bit,