In geological exploration work, according to industrial raw materials, mica ore reserves and calculate the rate of ore body. Industrial raw material mica refers to a mica block having an arbitrary shape, flat on both sides of the crystal, and an effective area of ​​not less than 4 cm ² . The ore ratio of the industrial raw material is expressed by the weight of the industrial raw material mica, that is, kg/m ³ in the unit ore volume.
The industrial indicators for the evaluation of mica deposits in China are shown in Table 1.

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