Why the screening process in the sand production line is critical

The finished product of the sand and gravel production line includes both smaller sand and larger stone. The screening of the finished raw materials is mainly carried out through the circular vibrating screen of the sand production equipment.Sand and gravel production is divided into crushing, screening, and sand making.The quality control of sand and gravel aggregate is mainly based on the requirements of concrete aggregate particle size and gradation.Using advanced and mature crushing equipment and vibrating screens and standard apertures for drying,in order to guarantee the graded quality standards and regulations determined by the concrete aggregate composite specification.

1. Screen control particle size: Polyurethane material square mesh screen can be used for the screen of coarse aggregate. The size of the mesh is divided into 5mm, 10mm, 20mm, 40mm, 80mm and other specifications according to the different aggregate gradation.In addition to the gravel inspection during the production process, centralized inspections are required every one month or every 20,000 to 30,000 cubic meters produced to ensure the integrity of the production equipment.

Multi-layer circular vibrating screens are generally used in water conservancy and hydropower projects for screening and grading. In small projects, because of the small amount of use, drum screens can be used for separate production as needed.

2. Screen impurity removal: Strictly control the inclination angle of the screen and the amount of raw materials to be screened, and equip it with a reliable and stable washing system. The arrangement of the spray holes should be uniform, and the water pressure should be adjusted to an appropriate pressure during flushing. The purpose is to keep the water evenly covering the entire screen and keep the screen tools clean at all times.

Therefore, after the stone is crushed, the screening of the stone is also very important and critical, because the screening of the finished material directly affects the shape of the subsequent finished product, and then affects the quality of the finished product.

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