Get well known about screen working principle

Get well known about screen working principle

According to the structure and screening machinery general principle of the following categories:
(1) fixed-screen work of the fixed-fixed, along the face by sliding materials be Screener materials. Screen grid is fixed in a more Concentrator applications, commonly used for rough broken or broken in before the pre-screening. It is simple, convenient manufacturing. No power consumption, can be unloaded directly to the ore to the screen surface. The main disadvantage is that low productivity, low efficiency screening, generally only 50-60 per cent.
(2) roller screen is the face of an order by the horizontal axis constitute the root rolling, a plate axis, fine-grained material from the roller or plate through the cracks. Bulk materials from one end to the roller-driven mobile and discharged from the terminal. Concentrator general rarely use such a sieve.
(3) cylinders for some screen work Cylindrical, the entire sieve around the cylinder axis of rotation, the axis in general downloading a small dip. Material from one end to the cylinder, small-level work surface materials from the cylinder through the sieve, coarse-grained material from the cylinder from the other end.
Screen cylinder low speed, steady work, good balance of power. However, its easy to plug the sieve, screening low efficiency, working a small area, low productivity. Concentrator rarely use it to make screening equipment.
(4) flat screen body movement is a swing plane or vibration. Their plane trajectory is divided into linear motion, circular motion, the elliptical motion and complex movement. Sieve shaker and shake fall into this category.
Shake screen as a crank linkage transmission components. Motor through the belt and pulley driven eccentric rotary shaft, through linkage to the body along a certain direction for reciprocating movement. Body movement direction perpendicular to the sting or hanging at the centerline, as the body of the swing movement, the screen surface of the material to a certain speed to the nesting-Mobile, the material also be screening.
Several sieve and shake the sieve compared to its productivity and efficiency of screening relatively high. Its drawback is the driving force poor balance. Concentrator now rarely use it, and be more reasonable structure to replace the shaker.
Concentrator in most applications, according to the different transmission mechanism, can be divided into the following types: eccentric shaker, inertial shaker, since the centre shaker, resonant screen.

 

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