Crushing and grinding ore valuation is prepared before the operation. Valuation is a prerequisite for a useful minerals in the ore separation of monomer reached.
Such as minerals useful for single particle size is very small, it is sometimes necessary to crushed ore will be less than 0.074 mm accounted for 80 percent of the fine, and even a way to achieve some small separation monomer useful minerals.
The block of ore project by the great degree, such as surface mining for ore block up to about 1000 mm, 1000 mm large pieces of broken pieces of mine only a few tens of microns (1 micron = 1 / 1000 mm), fine-grained, often need to be completed in several stages.
To pieces in the large-scale plant for the general election coarse, medium and fine three broken (also adopted four paragraphs), the lump gradually reduced to the size of 8-25 mm around, then sent to the abrasive machine. Up valuable mineral particles to achieve separation of the monomers.
At present, the crushing and milling method mainly with the role of institutions in the most common mechanical force generally have the next five years.
1. Crushed by two broken face when approaching the pressure to squeeze and broken equipment. Cushe machine jaw crusher cone crusher is the main means of grinding machine broken.
2. Split tip broken teeth area is to use the materials to carry out the division of the broken, and the role of the concentration of a limited fragmentation in brittle materials to the crusher.
3. Material broken in the face of the crushing burden that relate to two points (or pivot) of the bundle pack flexor surface material is broken.
4. Stripping two broken face grinding materials in the relative movement of materials imposed shear stress, so that important break occurred. This material suitable for fine grain grinding.
5. Crash impact of the use of the ore is broken. Impact of the moment is the role of the ore. For example, anti-crushing machine is broken at the main impact.
