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Further analysis on stages of Ore crushing and milling process

Crushing and grinding of ore beneficiation is prepared before the operation. Beneficiation is a prerequisite to make a useful minerals in the ore reached monomer separation.

As useful minerals to the single particle size is very small, it is sometimes necessary to ground ore will be less than 0.074 mm accounted for 80 per cent of the fine, and even some small way to achieve some useful minerals monomer Separation.

From stope ore block by the great degree, such as open-pit mining for ore block of up to about 1000 mm, 1000 mm to large pieces of broken pieces to the mine only a few dozen microns (1 micron = 1 / 1000 mm), fine-grained, often have to be completed in several stages.

To broken, in the large-scale plant the general election coarse, medium and fine three broken (also adopted four paragraphs), the lump ore gradually reduced to the size of 8-25 mm around, and then sent to the abrasive grinding machine . Until useful mineral particles to achieve separation of the monomers.

At present, the ore crushing and grinding method primarily with the role of institutions of the more common mechanical force generally have the following five.

1. Crushed by two broken face when approaching the squeeze pressure and make the materials broken. jaw cusher machine, roll crusher, cone crusher are the main way to crushing the broken machinery.

2. Split broken teeth wedge tip is to use the materials to carry out the split of the broken, and the role of the concentration of a limited fragmentation, in brittle materials to the crusher.

3. Broken materials in the face of crushing load as bear on the two points (or fulcrum) beam, a pack materials flexor surface itself broken.

4. Stripping two broken face grinding materials made in the relative movement of materials imposed shear stress, so that material rupture occurred. Of this fine-grained materials suitable for grinding.

5. Crushing impact of the use of it is broken ore. Impact of the moment is the role of the ore. For example, the counter-crushing machine is broken in the main impact.


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