subject: Importance Of Prescreening In Crushing Operation [print this page] In dealing with high water content and powder ore more ore, wet powder can clog the crusher in the crushing chamber, and significantly lower crusher production capacity. Use of prescreening remove wet and fine slag crusher, can cause more normal working conditions. Following the crushing and screening equipment manufacturersHongxing heavy for you the prescreening in crushing operations in importance:
Prescreening application mainly according to the ore in the fine grained (less than the period of breaker gape width size ) content to decide. Fine grained content higher, crusher adopting advance screening more favorable. Research proves, economy and technology by prescreening favorable ore, in which fine limit content and crushing ratio. When the ore granularity is a line, in a variety of crushing ratio, crusher which fine-grained content exceeding the limit value (i.e., in favor of using the pre sieving limit content.
Therefore, when the ore granularity is a line, no matter how big crushing ratio, the preliminary screening is beneficial. In most cases, ore particle size characteristics of concave in shape, it is broken by prescreening in economically worthwhile. Crusher but due to the advance screening need to increase plant height, when coarse crusher production capacity surplus, or by direct packed to mine, can do not have a prescreening.
Check screening is designed to control the crushed product size, and conducive to give full play to the production capacity of crushing machine. Because of the variety of crushing product there are a part is larger than the discharging mouth width of coarse particles, such as the short head cone crusher in the crushing medium can be crushed ore, product than the discharge mouth wide. Degree of particle content of 60%, the maximum size for discharging port of 2.2~ 2.7 times; in the broken broken ore is worse. Various crusher product coarse ( larger than the discharging mouth size ) content and maximum relative size (i.e., the maximum particle and gape size ratio).But check screening use, will make the investment increases, and the crushing workshop of equipment complexity, so it is generally only in the last crushing section adopts check screening, and with a sieving and form a closed cycle check advance screening.
