Banana screen is is a kind of equipment with high efficiency screening , is widely used in coal, mineral mining screening and other industries.
Banana screen, with the word screen in its name, is naturally a kind of screening equipment. But not screen bananas,it is a new type of screening equipment for mineral industry, can dry screen or wet screen, can replace our conventional sloped screen and horizontal screen work. Banana screen has a special shape and can be used for grading large and medium-sized materials with more fine-grain(particle diameter less than half the size of the screen hole) purity, and can also be used in dewatering, take off medium, desliming and other operations.
This design of decreasing slope makes the material flow at different stages of the screen at different speeds. With a large angle of slope at the inlet end and a large flow rate, large pieces of materials can through quickly, so that fine-grained materials can approach the screen surface and pass through the screen holes earlier. The advantage of this design is that the screening efficiency of the banana screen is increased by 50%-100% compared to the traditional classifying screen, while controlling the space.Banana screen can be used for both dry and wet screening, particle grading and also for desliming, dewatering, take off medium, compared with traditional screening equipment, the screening amount is upgraded but the place is not upgraded. Currently in large coal manufacturers and mineral manufacturers are strongly promoted and used.
Banana screen has advanced design, high manufacturing level, no welding on side plate, frame structure on beam and oscillator beam, high strength of the whole screen, smooth running, small deflection, low noise, and low odds of breakdown, which saves much time for maintenance.
(1)The screen surface is polygonal-shape, the angle from the inlet end to the outlet end gradually decreases, the screen surface is divided into five sections according to the different angles, each two rows of screen plate is an slope surface, from the inlet end to the outlet end in turn, the difference is 5.5°, respectively 25°, 19.5°, 14°, 8.5° and 3°. In the inlet end slope angle is large, the material has a large throwing strength and movement speed, so that the material quickly layered, the middle of the material has been divided into layers and then given the same acceleration and ordinary screen, so that the fine-grain material has a full opportunity to permeate the screen, the unit screen surface permeability screen capacity increased, so that the thickness of the material layer on the screen from the human material end to the discharge end basically remain the same.
(2) The screen plate is made of polyurethane and stainless steel screen strip, and the screen plate is surrounded by polyurethane material, which has good wear resistance and low noise. The middle is stainless steel screen strip, which has the characteristics of high strength, wear resistance and high opening rate compared with other materials.
(3) The installation structure of the screen plate is simple. There is no bolt connection between the screen plate and the screen plate, and the screen plate is not easy to be loosened by the plasticity of the polyurethane material, which reduces the occurrence of accidents. There is a protective cover between the screen plate rail seat and the support beam, so that the bolts under the rail seat will not be corroded and worn by coal and water.
(4)The vibration exciter adopts the whole box type vibration exciter. The vibration exciter is installed in the upper beam of the screen box, the box is equipped with the active shaft and driven shaft, the shaft has a pair of eccentric blocks of the same weight, through the gears of the two shafts to do rotate in the opposite direction at the same time, so that the eccentric block rotation, centrifugal force to form the excitation force. The vibration exciter adopts the whole box type vibration exciter. The vibration exciter is installed in the upper beam of the screen box, the box is equipped with the active shaft and driven shaft, the shaft has a pair of eccentric blocks of the same weight, through the gears of the two shafts to do rotate in the opposite direction at the same time, so that the eccentric block rotation, centrifugal force to form the excitation force. The eccentric blocks are arranged in pairs outside the vibration exciter box, it makes the box compact, the gears are installed in the box, the lubrication is reliable, and the transmission is smooth.
(5)Simple drive system: the transmission system consists of a 45 Kw motor, through three V-belt drive to the universal connection shaft, universal connection shaft by connecting the wheel and the exciter, so that the vibration of the vibrating screen caused by the connection length and axis angle changes.
(6) The protective cover strip on both sides of the screen surface is fastened, and the structure is simple and firmly connected. The two contact surfaces of the protective cover strips on both sides of the screen surface are beveled, with large contact area, and the pressure plate on top is not easy to be loosened.
Banana screen is widely used in many industries because of its advantageous features such as high screening efficiency and large processing capacity. It is your ideal choice of screening equipment.
