Sieving Equipment in Beneficiation process
Author : RuiGuang Time : 2013-10-16 Click :
Sieving equipment sieving the particles of different sizes mixed materials through the sieve and into a single layer or several layers of different levels of granularity is called screening . Screening equipment is divided into fixed screen, Vibrating Screen , self-centering shaker, heavy vibrating screen, resonance screen, vibrating sieve.Fixed Screen
Fixed screen is composed of parallel steel bars or bars arranged composition , steel bars and steel bars called riffles , riffle linked together by rail , the gap between the size of the grid of mesh size is . Fixed screening for the grizzly and two kinds of sieve .
Vibrating
Vibrating screen is widely used in industry as a sieve, wide application, suitable for medium and pre- crushing and screening examination . According to the trajectory of the screen frame , and can be divided into circular motion vibrating screen and linear vibrating motion sieve categories. The former includes single-axis inertial shaker, self-centering and heavy shaker shaker ; latter includes biaxial inertia and resonance shaker screen, press the mesh layers can also be divided into single and double sieve sieve categories.
Self-centering vibration
Self-centering shaker suitable for large and medium-sized plants , the fine material screening . Domestic self-centering sieve model SZZ, divided into different layers according to sieve SZZ1 ( single ) and SZZ2 ( double ) . Generally hanging screen, but there are seat-type sieve.
Heavy Vibration
The principle of heavy vibrating screen vibrating screen with self-centering similar, but completely eccentric shaft vibrator and eccentric shaft hole in the pulley operation to achieve the purpose of self-centering . Heavy duty vibrating screen structure is strong enough to withstand greater impact loads for screening large degree , the relative density of the material , maximum feed up to 350mm. Mainly used in the pre- crushed before screening , in addition, moisture , high clay content of the material can be broken in before the pre-screening and washing , sieve material into the crusher , screen material into the washing off under mud system .
Resonance
Also known as flexible linkage resonance sieve shaker , large amplitude, high efficiency, large capacity, power consumption is small and compact. However, complex manufacturing process, the quality of a large machine , the amplitude is difficult to stabilize , adjust more complex, rubber springs easy to aging .
Linear vibration
Linear vibrating screen vibrating force, large amplitude vibrations strong , high screening efficiency , productivity , can be coarse screening block materials. Because horizontal installation, the installation height is small , linear reciprocating movement of dehydration, mud and heavy media beneficiation off media favor. But the structure is relatively complex , high-speed rotation of the two shafts , the manufacture and lubrication requirements, vibration not easy to adjust .