The vibrating screen is screened by a mesh operation. The screening of the material is controlled by the sieve aperture on the vibrating screen to control the screening particle size of the material. Therefore, the effective selection of the screen is the main factor for improving the efficiency of the vibrating screen.
(1) Conversion of mesh size and pore size of vibrating screen. Since the Taylor sieve index is based on a 200 mesh mesh size of 0.074 mm, the 100 mesh aperture is 200*0.074 mm ÷ 100 = 0.148 mm; the 325 mesh aperture is 200 * 0.074 mm ÷ 325 = 0.045 mm.
(2) The mesh aperture is the size of the mesh size indicating the standard sieve; the wire diameter of the mesh refers to the diameter of the braided wire;
(3) The mesh number is the number of mesh holes in the length of 2.54 cm (1 inch), and is simply referred to as the mesh. For example, 50 mesh means that there are 50 holes in 1 inch and 500 holes in 500 mesh. The higher the mesh number, the more the holes are. In addition to the apertures representing the screen, it is also used to indicate the particle size of the particles that can pass through the screen. The higher the mesh size, the smaller the particle size.
(4) The particle size of the powder is called the particle size. Due to the complexity of the particle shape, there are usually several representation methods such as sieve size, sedimentation particle size, equivalent volume particle size, and equivalent surface area particle size. The sieve size is the size of the sieve through which the particles can pass through the screen, and is expressed as the number of sieve holes in the screen of 1 inch (25.4 mm) width, and is therefore referred to as the mesh number.
(5) At present, the calculated diameter of the general equivalent volume particles is represented internationally to represent the particle diameter. Expressed in μm or mm.
(6) The correct choice of screen is very important.
(7) Example: The material sieved by the customer is silicon carbide. At this time, the coarse wire screen of the abrasive grade must be selected because of the abrasiveness and particularity of the material.