Three-Stage Crushing Flow for Grinding Preparation

The basic form of three-stage crushing flow consists of three sections of open circuit process and three sections and a closed-circuit process. As part of the grinding preparation work, three sections and a closed-circuit process is widely used. Whether underground mining or open mining, as long as the mud content in crude ore is not high, the ores can be adapted effectively. Therefore, the dressing plant with different scales can use the three sections and a closed-circuit process.

Compared with three sections and a closed-circuit process, the product in three sections of open circuit process is coarse grained but this process can simplify configuration in crushing plant and save infrastructure investment. Therefore, three sections of open circuit process can be used in such conditions: the feed size in ore grinding is not so strict, or rod mill is used in coarse grinding during grinding period, or when processing clay ore stone with high moisture, or limited by topography. In processing ores with high mud content and high water content, sieve net and crushing cavity in three sections and a closed-circuit process will be easily blocked, but three sections of open circuit process does not have this question.

The ore crushing flow that uses three sections of open circuit process with ball mill will not need complex closed-circuit screening and transportation operations with production returning. What's more, ball mill is hardly affected by feed size and discharging size is uniform so that operation stability of grinding work in next period can be guaranteed. At the same time, the dust in production process is less so that working sanitary condition can be improved. When asked to process grinding mineral production with coarse granularity (in gravity separation factory) or process minerals which is brittle (tungsten ore, tin ore) and large specific gravity (lead ore), three sections of open circuit process can be used. Only when dealing with very hard minerals...