(1) Fixed screen work part fixed motionless, by the material slides along the face to make the material to be screened. A fixed sieve is used in a concentrator, usually for coarse or medium crushing prior screening. It is simple in structure and convenient in manufacture. Without power, the ore can be unloaded directly onto the screen. The main disadvantage is low production rate, screening efficiency is low, generally only $number.
(2) Cylinder sieve working part is cylindrical, the whole sieve revolves round the cylinder body axis, the axis is in the general case the inclination of the small. The material is given from one end of the cylinder, and the fine grade material is passed through the sieve hole of the cylindrical working surface, and the coarse material is discharged from the other end of the cylinder. The rotational speed of the cylindrical sieve is very low, the work is steady and the power balance is good. But its sieve hole is easy to jam, the sieving efficiency is low, the work area is small, the production rate is low. The concentrator seldom uses it for sieving equipment.
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