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同加拿大的其他矿山一样,在陡岩铁矿公司各铁矿也要进行品位控制。其目的有二:(1)保证选厂和球团厂的均匀给料,以便生产符合用户要求的球团矿;(2)最大限度地提高矿石回采率,以便尽量减少矿石损失和贫化。在陡岩铁矿公司,含铁40～66％的物料算作矿石。矿石中硫的含量可达10％。在上述含量范围内,可以划分出六个不同的矿堆类型;如果砷的含量较高,则可划分出更多的矿堆类型。虽然用来达到上述目的分级方法和采矿方法是很标准的,但是,仍然需要配备质量管理人员经常进行质量临督和观察判断,以便使品位控制收到良好效果。这样就从纵横结合上为品位控制取得成功,创造了必要的条件。在陡岩铁矿公司,剥采比高于加拿大的其他任何铁矿。而且,采出矿石的很大一部分都要送到球团厂。因此,品位控制是很重要的。
Like other mines in Canada, they also have grade controls at each iron ore mine at Steep Rock. Its purpose is twofold: (1) to ensure uniform feeding of the mill and pelletizing plant to produce pellets that meet the user’s requirements; and (2) to maximize ore recovery rates in order to minimize ore loss and depletion. At Steep Rock Iron Ore, 40 to 66% of iron is counted as ore. Ore in the sulfur content of up to 10%. Within the above range, six different types of ore mines can be subdivided; if the arsenic content is higher, more types of mines can be identified. Although the grading methods and mining methods used to achieve the above objectives are standard, there is still a need to equip quality managers to conduct frequent quality inspections and observation judgments in order to achieve good results in grade control. This combination of vertical and horizontal control for the success of the grade, and created the necessary conditions. At Steep Rock, the stripping ratio is higher than any other iron ore in Canada. Moreover, a large part of the ore is sent to the pellet plant. Therefore, grade control is very important.