Arc sieve products work principle and the use of information

The curved vibrating screen is turned from the inlet box, the sieve box and the screen unit shaft to realize the position of the feed end and the discharge end to achieve uniform wear and prolong the service life, and the operation is flexible and convenient. And in metallurgy, chemical and other industries have also been widely used.

Curved vibrating screen is a fixed radius of curvature and the angle of the fixed seam sieve, it does not have moving parts, the structure is relatively simple, but the processing capacity is very large. Curved sieve in the coal preparation process is responsible for dehydration, disengagement, desliming, graded sludge recovery role. According to the different feeding methods, can be divided into two kinds: one is the pressureless feeding of the self-flow curved sieve; the other is the pressure of the pressure of the arc sieve. Curved sieve mainly consists of a group of sieve bar horizontal arrangement of circular curved sieve, feeder, nesting funnel and bracket and other components. The screen bar for making the curved sieve is a trapezoidal screen, and the arrangement of the sieve is perpendicular to the direction of movement of the slurry on the sieve surface. Screen bars are generally made of stainless steel, sometimes made of nylon.

When the sieved slurry is fed to the sieve surface at a certain speed along the tangential direction, the slurry moves closer to the sieve surface under the action of centrifugal force, gravity and frictional force, and the material layer flows from one screen to another In the course of the root sieve, the cutting of the material layer is caused by the edge of the screen bar, so that part of the water and the fine particles are separated and the part of the material is cut and discharged under the centrifugal force to become the sieve Under the product; not cut this part of the material layer, the screen surface through the flow into a sieve products. Each screen bar cut the flow rate of the thickness of the screen is generally the width of the gap of 1/2 to 1/4. The largest particles in the product are about 1/2 of the sieve.

The curved sieves can be made in different radii and different angles as needed. Commonly used angles are 45 °, 60 °, 90 °, 180 ° and 270 °. Self-flow curved sieves, often with 45 °, 60 ° and 90 ° arc angle, for coal preparation and concentrator. Pressure-type curved sieves, often 180 ° and 270 ° of the arc, for the cement industry in the grinding process in the grading operations.

As the arc sieve discharge capacity is very large, many coal preparation plants often in the dehydration sieve before the use of curved sieve for dehydration, the sieve gap is generally higher than the next process dehydration sieve gap 3 to 6 times, but the largest More than 3mm. The width of the curved screen should be 150 to 200 mm smaller than the width of the dewatering screen 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 with a pivotal steering structure, can rotate 180 ° curved sieve, extending the screen surface life. In addition, experts also developed a two-way curved sieve, which consists of vibration motor, cloth, screen box, which is characterized by the screen box by the two side panels, branch steel pipe, two reverse installation of the screen and points And the other end of the branch pipe is fixed on the base, and the side plate is connected with the base; the vibration motor is installed outside the screen box, and the distributor is installed on the top of the screen box , This two-way curved screen uses two screens, not only to improve the processing capacity of the curved screen, the use of vibration motor also makes arc sieve screening more efficient, and make the replacement screen is very convenient.