Pre-screening before entering the broken ore segment previously screened out qualified grain size, you can reduce the amount of ore into the crusher, to increase production capacity of crusher; at the same time to prevent the rich ore produced a smash. In dealing with higher moisture and more powder-containing ore mine, wet slag can clog the crusher crushing chamber, and significantly reduce the production capacity of the crusher. The use of pre-screening and removal of wet fine ore, may cause a more normal working conditions for the crusher.
The following crushing and screening equipment manufacturers Island Heavy summer you outlined the importance of pre-screening in the crushing job:
Pre-screening of applications based primarily on fine grade ores (grain size less than the segment crusher discharge mouth width) of the content to decide. The higher the content of fine particles, crusher prescreening more favorable. Studies have shown that technically and economically advantageous to use a pre-screening of the ore, which limit fine fraction crushing ratio crusher related content. When the ore particle size characteristics of a straight line, in a variety of crushing ratio condition in which the content of fine particles crushers were above those limits (ie, in favor of the use of pre-screening content limit.
The Vibrating Screen
It can be seen, when the ore particle size characteristics of a straight line, no matter how big crusher ratio, using pre-screening is always beneficial. In most cases, the particle size characteristics of ore concave, so the use of pre-screening before crushing on economically advantageous. Crusher but due to the need to increase the pre-screening plant height, when production capacity crushing machine has surplus, or directly to the mine packed using, do not set pre-screening.
Check the screening is intended to control the particle size of the crushed product, and is conducive to full production capacity crusher. Because of various crusher crushed product are present as part of the port of discharge is greater than the width of the coarse fraction, such as short head cone crusher crushing medium can be broken at the time of the ore, the product is greater than the discharge mouth wide. Content of the grain size of up to 60%, the maximum particle size of 2.2 to 2.7 times the discharge mouth; in the broken pieces of the ore is even more difficult. All kinds of crusher product coarse fraction (greater than discharge mine mouth size) content and the maximum relative size (ie, the ratio of the maximum particle size of the port of discharge).
With checks and screening, grain size makes unqualified return crusher, grinding machine and the like into a closed circulation grader will help improve grinding efficiency, as inspection screening play crusher production capacity can be improved. But check screening of adoption, will increase investment, and crushing plant equipment configuration complicated, it is generally only last a crusher section with inspection screening, and constitute a pre-inspection and pre-screening closed-circuit screening merger cycle.
