The size of the dewatering screen has a great impact on the efficiency of the equipment. Generally, manufacturers have a set of solutions to meet the needs of different customers. There are many shapes of sieve holes in dewatering sieves, common ones are round, square and rectangular. Compared with sieve holes of other shapes, round sieve holes can pass through the sieve holes with the same nominal size. The particle size of the product under sieve is smaller. The particle size of the particles that actually pass through the round sieve holes is only the average size of the particles passing through the square sieve holes of the same size. The effective area of the sieve surface of the rectangular sieve is larger. The production capacity is higher. When dealing with materials with more water, it can reduce the clogging of the sieve surface. . Therefore, when it is required that there is no fine powder in the sieve, strip and flake particles are allowed in the sieve, the material is