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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

From the perspective of sludge treatment equipment supply, the equipment supply chain of sludge treatment can be refined and divided into tempering and wall breaking, sludge dewatering machine, conveying equipment, deodorizing equipment, digestion equipment, composting equipment, drying equipment, and incineration equipment according to demand. Among them, the technical content of dewatering machine, conveying equipment, and deodorizing equipment is relatively low, and tends to be general equipment; while the technical content of digestion equipment, composting equipment, drying equipment, and incineration equipment is relatively high, involving the company’s parameter setting for sludge treatment process, engineering experience, etc.; the highest technical barriers are still related technical equipment of tempering and wall breaking. Harmlessness and stabilization are the basic requirements of various treatment technologies, and the method is incineration and subsequent treatment of f

The LX SERIES spiral sand washing machine also named sand screw, screw sand washer, which was designed to provide bigger capacity and higher cleaning level than traditional ones. The input materials’ max size can be 30mm. Widely used for cleaning materials in the quarry, minerals, building materials, transportation, chemical industry, water conservancy and hydropower, cement mixture station and so on. They are ideal for construction sand producers, mining companies, salt/brine reclamation, and glass recycling. It is composed of the electric motor, big and small belt pulleys, triangle belt and gear reducer. The screw sand washer adopts inclination of 15 degrees. Under the water tub, three weir plates form the sediment pool. The spiral head is immersed in this pool, and the spiral is driven by electric motor through reducer rotating continuously. The fresh water is fed from porous plate at bottom of sediment pool, and the washed sand is discharged on the top side and delivered by belt c

For concrete cohesion, they believe that if there are fewer particles <0.075mm in the sand, the concrete will easily bleed, and the mixed concrete will be relatively dry and astringent. Therefore, the appropriate content of <0.075mm particles has certain benefits for the cohesion and water retention of concrete. When the mud content is 5% of the sand mass, the workability is good, but when it reaches 10%, the bleeding of concrete is more obvious. The mud content not only has some effect on the initial slump of concrete, but also has a great harm to the slump loss of concrete over time. In the absence of admixtures, it is generally believed that when the mud content in the sand is <3%, the workability of the concrete is less affected, but as the mud content increases, the slump of the concrete continues to decrease. When it is greater than 3%, the workability of the concrete will be greatly affected. https://www.lzzgmachine.com/service-parts/product-knowledge/retaining-fine-par