2013年6月7日星期五

MINING AND ORE BENEFICIATION - 2. Ore Beneficiation - 2.1 General - 02

In principle, two important properties of the ore determine the flow sheet of an ore dressing plant:
1. The particle size of the tungsten ore which determines the degree of disintegrations necessary to liberate the tungsten mineral (liberation size).
2. The type and concentration of the accompanying minerals (gangue) which have to be separated dictate the mode and number of separation steps.
Ore beneficiation consists of two main steps: comminution and concentration. Comminution is first performed by crushing. Equipment in use comprises jaw, cone, or impact crushers working mostly in closed circuits with vibratory screens. The second step in coinminution is grinding, which is undertaken in rod or ball mills working in closed circuits with classifiers.

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