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Frac sand screen working principle After the screen machine is started, the screen box reciprocates back and forth under the action of inertial force. The screen box drives the screen surface to periodically shake, so that the materials on the screen surface will make a directional jump movement with the screen box. The material smaller than the screen surface aperture After falling through the sieve hole, it becomes the sieve. The material larger than the hole diameter of the sieve surface is discharged from the discharge port after continuous tumbling and jumping movement to complete the screening work.

Core equipment for tungsten ore crushing and grinding Jaw crusher: Preliminary crushing of large pieces of ore, laying the foundation for subsequent processing. Cone or impact crusher: Further refine the ore particle size to meet the grinding requirements. Ball mill: Core grinding equipment, grinding the ore to the required fineness through friction and impact. Key equipment for classification and concentration Spiral classifier or hydrocyclone: ​​Classify the ore pulp after grinding and optimize the selection conditions. Concentrator: Increase the mineral concentration, reduce the moisture, and provide the best conditions for subsequent selection. High-efficiency sorting technology equipment Flotation machine: Use reagents and slurry conditions to efficiently separate the target minerals from the gangue. Magnetic separator: Effectively separate magnetic minerals. Screening equipment: remove impurities and optimize pulp quality.

Generally speaking, the water quality and concentration of sewage and sludge , as well as changes in sewage properties, will affect the dosage of flocculants. Turbidity, that is, concentration, is directly reflected in the dosage. For sewage or sludge with low turbidity, a small amount of flocculant can produce an effect, while for sewage with high turbidity and high concentration, a small amount of flocculant will not work. In sand washing wastewater, 12g-20g of flocculant polyacrylamide needs to be added per ton of sand washing wastewater, and the dosage is adjusted according to the concentration of sediment in the muddy water. Ore dressing wastewater is generally solved with 6g of polyacrylamide. In the treatment of coal washing wastewater, the dosage is the same as that of the ore dressing industry, and 6g can be added. The above data is anionic polyacrylamide with a molecular weight of 16-18 million. In sludge dehydration, urban sewage treatment plants that need cationic polyacryl