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Advance screening is entering the broken section in ore sieve out in advance of the level of qualified, can reduce the amount of ore into crusherimprove the crusher production capacity; At the same time can prevent the rich ore produced pieces. In dealing with contains moisture content is higher and powder grinding more ore, wet kuangfen can jam the crusher crushing cavity, and significantly reduce the crusher production capacity. In advance of the screening away with wet and fine kuangfen, can cause for crusher than the normal working conditions. The screening equipment manufacturer broken XiaZhou heavy industry in advance for you this screening in broken the importance of homework:
The application of the screening in advance according to the fine particle in the ore grade (less than when crusher row of the width of the mouth of ore grade) content to decide. The higher the level of fine grained content, crusher USES preliminary screening the more favorable. Study proves, technology and economy in advance on the screening favorable ore, fine particle of the limit of the content and level of the crusher than the broken. When the crude ore size characteristics to linear, in all kinds of crushing ratio,Cone crusher manufacturer under the condition of fine grained the level of crusher content are more than the limit (that is advantageous to the limit of the advance screening content.

As you can see, when the crude ore size characteristics to linear, no matter how much than crusher for, USES preliminary screening always favorable. In most cases, the grain size characteristics of the crude ore concave shape, the broken in advance before the screening economic is worthwhile. Crusher due to the adoption of advance screening needs to increase the plant height, when crushing machine of surplus production power, or use direct packed with gives the ore, don't have advance screening.

Check the screening the purpose is to control the granularity of broken products, and to give full play to the crusher production capacity. Because all sorts of crusher of broken product there is greater than the row of mine mouth of the width of the macrolevel, such as short head medium can be broken in pieces of ore, the product is greater than mine mouth wide in line. The degree of level was 60%, the largest size of the mouth of the mine 2.2 ~ 2.7 times; In the broken pieces of ore to what is even more. All kinds of crusher products macrolevel (more than row ore mouth size) content and the maximum relative size (that is the biggest particles and row ore size than the mouth)
Check the screening, so that the level of unqualified to return to crusher, as grinding machine and the sorting machine into closed-circuit circulation is helpful to improve the grinding efficiency, check the screening of crusher production ability to play can be improved. But check the screening adoption, and will make an increase in investment, and make broken workshop equipment configuration complexity, so only in general last crusher period of the check screening, and advance screening merger with a check in advance screening closed-circuit circulation.