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 monomer size is very small, sometimes need to ore ground to less than 0. 074 mm accounted for 80% of the fineness, and even some small way to achieve some kind of useful minerals monomer separation.
From stope ore out of the big block, for example, open-pit mining for ore blocks of up to 1000 mm or so largest, to up to 1,000 mm of ore crusher to block only a few dozen microns (1 micron = 1 / 1000 mm), fine-grained, often in several stages to complete.
A broken, in large election plants generally use coarse, medium and fine three broken (also adopted four paragraphs), so that the ore block size gradually reduced to 8-25 mm around, and then sent to the grinding machine grinding. Until useful mineral particles can achieve monomer separation date.
Currently, the ore crushing and grinding method primarily through agencies of the role of the more common mechanical forces generally have the following five.
1. Crushed by two broken face when approaching the squeeze pressure and make the materials broken. E-breakers, roll crusher, cone crusher are the main way to crushing the broken machinery.
2. Chop broken tooth wedging is to use a sharp cut of the materials to carry out broken, the role of centralized power, a limited fragmentation, brittle materials adapted to the crusher.
3. Broken materials in the face of crushing load as bear on the two points (or fulcrum) beam, so that a pack of materials flexor surface itself broken.
4. Stripping two broken face grinding materials made in the relative movement of materials on shear force, thereby enabling materials rupture occurred. This force suited to the grind fine-grained materials.
5. It was smashed by the impact of broken ore. Impact of the moment is the role of the ore. For example counterattack Breakers is the fragmentation of the main impact.
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