• 07 Nov, 2022
• By EPIC Powder
• 2 Comments

How does the jet mill crush and grade superhard materials? EPIC Powder Machinery

In important fields such as chemical industry, construction, power plant, ore and coal, superfine crushing equipment is mostly used. However, with the improvement of production requirements of modern industry, traditional superfine crushing equipment for many superhard materials can no longer meet their particle size requirements. At this time, as a well-known favorite of superfine crushing equipment, air flow pulverizers have come to the fore and are increasingly used in these fields, Now let's talk about how the air flow pulverizer can crush and grade superhard materials

Airflow pulverizer uses the high-speed airflow of ultra-fine pulverizer to accelerate the materials to supersonic speed so that they collide with each other at the intersection of nozzles. Fluidized bed air flow pulverizer uses several relatively arranged nozzles to form high-speed airflow to achieve the purpose of ultra-fine pulverization. The crushed materials enter the classification room of the classifier with the rising air flow. Because the classification rotor rotates at a high speed, the particles are subject to both the centrifugal force generated by the classification rotor and the centripetal force generated by the viscous effect of the air flow. When the centrifugal force received by the particles is greater than the centripetal force, that is, the coarse particles above the classification particle size return to the grinding room to continue to impact and crush. The fine particles enter the cyclone separator and the collector with the air flow for collection, and the gas is discharged by the induced draft fan. Features of air flow pulverizer: 1. Green and environmental protection: low temperature and media free pulverization, which ensures the high purity and physical characteristics of the product. The equipment operates under negative pressure without dust pollution. 2. High efficiency: the full use of jet energy can improve the crushing efficiency by 30% and the classification accuracy is higher than that of the traditional air jet mill. 3. Small wear of equipment:“ Fluidized bed+vertical classifier” Its structure can be used to process ultra-fine powder with high purity and ultra narrow size, avoiding“ Fluidized bed+horizontal classifier” For wear of graded parts, the service life of wearing parts of equipment with the same material is 20 times that of similar international products. The wear is very small, especially suitable for ultra-fine grinding of high purity and high hardness materials. 4. High output: when producing products with narrow particle size distribution, the yield is more than twice as high as that of traditional jet mill and fluidized bed jet mill. 5. Multi purpose: One machine can be used for many purposes, and can be used as a crusher or a grader. The range of crushing particle size is wide, and the product particle size can be arbitrarily adjusted within the range of 1-74um. 6. Intelligent: the equipment can realize all automatic control, simple operation, stable operation and excellent production environment. 7. Reasonable design: the equipment has a compact structure, and there is no material storage or dead space in the crushing host. It is easy to dismantle and wash, disinfect, and change the type of crushing materials. 8. The whole system adopts automatic control, which can realize one key start and stop. The operation is simple and convenient, and the connection with the central control can realize remote control. It can be seen from the above that the air flow crusher is different from the traditional equipment that uses hammers, blades and other external forces to crush raw materials. Instead, it uses the crushing method that makes raw materials particles collide with each other to achieve the purpose of crushing. This method makes raw materials with higher hardness easier to crush, and less contact with equipment during crushing, thus reducing the wear of equipment and ensuring the purity of raw materials