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Q: What is the suitable feeding size for grinding mill?
A: Totally speaking, the much suitable size is 20mm. Many think that the smaller the better. It is not that thing. Because the material is crushed and grinded between the roller and ring. If the size is too small, it can not be grinded fully. And the efficiency of the grinding mill will be affected. Reversely, the large particle will do harm to the roller and ring, it is not very economy.

Q: The advantage and disadvantage of mobile crushing plant
A: The mobile crushing plant is easy to be fixed, when it arrive the working spot, it can be put into use. It is very convenient for the customer. And the generator can power whole plant, it is much better for the powerless place.But the mobile crushing plant is long and heavy, it is difficult to ship. It can not be put into container, and we need the bulk cargo to deliver it. The freight cost is much high.Another problem is feeding the material to the crushers. If the loader or dumper can not feed enough material to the hopper, the capacity of the portable crushing plant will be decreased.