Arc-shaped vibrating screen (curved screen) Product works and the use of Notes

The arc-shaped vibrating screen is flipped from the feeding box, screen box and screen base to realize the swap of the feeding end and the discharging end, so as to achieve uniform wear and prolong the service life and the operation is flexible and convenient. And in the metallurgical, chemical and other industries have also been widely used.
Arc-shaped vibrating screen is a kind of fixed-slotted screen with certain radius of curvature and angle of wrapping. It has no moving parts. Its structure is relatively simple, but its processing capacity is very large. Arc screen in the coal preparation process is responsible for dehydration, desorption, desliming, classification of slime recovery role. According to the different feeding methods can be divided into two types: one is no pressure feed gravity arc screen; the other is the pressure feed pressure arc screen. Arc-shaped screen is mainly composed of a group of screen bars arranged in a circular arc-shaped screen surface, feeder, discharge funnel and bracket and other components. The screen bar used to make the arc screen surface is the trapezoidal screen bar, the direction of arrangement of the screen bar is perpendicular to the movement direction of the slurry on the screen surface. Sieve bar is generally made of stainless steel, and sometimes nylon production.
When the screening of the slurry to a certain speed along the tangential direction to the screen surface, the centrifugal force, gravity and friction under the action of the slurry close to the screen surface movement, the material layer from one screen to another In the course of the root screen, the edge of the screen strip has the cutting effect on the material layer, so that a part of the water and fine particles are separated, and this part of the material is cut out under the action of centrifugal force, Under the product; not to be cut this part of the material layer, the screen surface flow to become on-screen products. The flow rate of each screen bar is usually 1/2 ~ 1/4 of the gap width of the screen bar. The largest particles in the sieve are about 1/2 of the size of the sieve.
The arc sieves can be made with different radii and different angles as required. Commonly used angle of 45 °, 60 °, 90 °, 180 ° and 270 ° five. Self-propelled arc screens are often used with arc angles of 45 °, 60 ° and 90 ° for coal preparation plants and concentrators. Pressure-type arc sieves, often used 180 ° and 270 ° arc, for the cement industry in the grinding process in the grading operations.
Because the discharge capacity of the arc sieve is very large, many coal preparation plants often use the arc sieve as the pre-dehydration before the dehydration sieve. The sieve gap is generally 3 to 6 times larger than that of the next step. More than 3 mm. The width of the arc sieve should be 150-200 mm smaller than the width of the dewatering sieve in the next step. Curved screens can also be used in series as needed.
As the design of continuous improvement, manufacturers also need to design a screen frame using the pivot structure, can rotate 180 ° arc screen, extending the life of the screen surface. The experts also developed a two-way curved screen, which consists of vibration motor, distributor, screen box composition, which is characterized by sieve box by the two side panels, branch network of steel, two reverse installation of the screen and points And the other end is fixed on the base, the side plate is connected with the base; the vibration motor is installed on the screen box, and the distributor is arranged on the top of the screen box; the screen is fixed on the bottom of the screen box; , This two-way curved screen using two screens, not only improve the handling capacity of arc sieve, the use of vibration motor also makes the arc sieve screening more efficient, and make the replacement screen is very convenient.