Coal Vibrating Screen, Coal Screening Plant, Coal Preparation
Coal Vibrating Screen
The coal vibrating screen developed by SBM Machinery has accessed to national patents, and the coal screen as important coal preparation equipment act as an important role in the processing flow of coal screening plant. The ideal coal screening equipment is widely used in coal industry large-scale, mechanization, continuous grading operation.
Our cola vibratory screening has many advantages: light weight, low noise, small energy consumption, high efficiency, long service life, simple structure, convenient maintenance characteristic, used the high wear-resisting and high hole etc.
Coal Screen For Coal Preparation
Fugitive emissions occur at the screens when fine coal is involved. The coal preparation plants generally use three types of coal screens: grizzly, shaker, and vibrating. Grizzly coal screens are used on ROM coal preceding a crusher or loading a belt conveyor. They usually are served by sprays, but are sometimes enclosed. The doors, plates, and seals of the enclosure are highly subject to damage by pieces of metal or rock. Wet, incoming material may cause plugging of the branch air duct from the enclosure to the dust collector, which should be sized to carry dust-laden air, at the minimum pressure available, at a velocity of not less than 4500 fpm.
Shaker coal screens are used infrequently, rarely providing a separation less than two inches (usually much larger). A hooded enclosure may be found alongside the screen. Principal malfunctions involve plugging, short-circuiting, or improper sizing of the conveying ducts, damage to the hood, or improper placement of the hood.
A coal vibrating screen is the most common separating device. Many screens are flooded with water and constitute no dust source. The “dry” screens usually make a separation at 1/4-3/8-1/2 inch and create fugitive dust. Malfunctions involve loose seals, damaged enclosures, open access doors, and blocked or short-circuited air ducts.
Reducing Coal Vibrating Screening Noise
Vibrating screen is the main coal preparation screening. Warehouse wall is due to the vibration characteristics of itself in the normal work decision must be through the vibration can realize the screening, and the vibration is the root cause of noise. To reduce noise during the coal vibrating screen working, it should be as follows:
- tighten the vibrating screen all parts, especially the need to replace frequently sieves, avoid the looseness of individual components of the extra vibration;
- put the steel plate punching change for elastic modulus small, prevent block device of low noise impact polyurethane screen panel plate or rubber sieves;
- add rubber plate in screen box side plate, chassis and feeding mouth, so can effectively suppress the side plate high frequency vibration, reduce radiation noise;
- with a rubber spring replace spring steel, in order to reduce screen impact;
- in vitro of the vibrator insert soft sound insulation cover.
