China Drying Equipment Co., Ltd.: The jet mill, unlike other shredders, is under the action of high-speed air flow, the impact of materials through the particles between itself, the impact of air flow on the impact of the material and the impact of materials and other components, friction, Cut to crush the material. Wire Mesh,Chicken Wire,Metal Mesh,Steel Mesh Anping Red Star Wire Mesh MFG Co., Ltd. , https://www.screening-media.net
The airflow crusher uses materials under the action of high-speed airflow to obtain huge kinetic energy, causing high-speed collisions and violent friction between material particles in the crushing chamber, and at the same time, the high-speed airflow generates a shearing effect on the material, thereby achieving the purpose of crushing the material. It can process raw materials into very fine powders (<10μm). The application of this technology covers almost all fine processing industries such as chemicals, plastics, mining, and metal materials, and occupies a special position in many specific powder fields.
Disadvantages Improvements There are currently several types of jet mills currently in use in the industry: flat jet mills, fluidized bed jet jet mills, recirculating pipe jet mills, jet jet mills, and target jet mills. At present, most of the fluidized bed jet-jet mills used in the industry are designed to have a parallel and symmetrical arrangement along the inner wall of the comminution cavity. The jets are only formed in a single plane, so the materials to be crushed can only be one. Crushing in the range of approximately planes leads to the following disadvantages:
(1) Once the material falls into the coarse material collector at the bottom of the crushing chamber, it enters the comminution blind area and cannot be further crushed;
(2) limited by the nozzle, the coarse material collector at the bottom of the smashing chamber is in the fluidized state blind zone, and the material does not have a fluidized state, so it cannot be crushed;
(3) The crushing zone is limited by the crushing chamber, resulting in a narrow area, which reduces the probability of crushing the airstream.
In response to many of the above problems, many research institutes and manufacturing companies have made a lot of improvements and have also applied for a large number of patents. Among them, the effect of the three-dimensional arrangement of the nozzles is the most ideal, which enlarges the crushing area and increases the collision friction probability between the material particles. Is a combination of flat and fluidized bed type of a new device, according to the performance test data, to achieve the level of similar products, under the premise of the same product and granularity, the output is significantly higher than similar products.
Air-flow crusher seeks energy-saving efficiency It is understood that the air-flow crushing can be operated under aseptic conditions; the production process is continuous, the production capacity is large, and the degree of automation and automation is high. However, mechanical impact mills, vibratory mills, and agitation mills often have long production cycles, resulting in low production efficiency. When the materials are crushed, a large amount of heat is generated, resulting in deterioration of the heat-sensitive materials. Furthermore, the wear of the equipment may contaminate the product. . Therefore, these mechanical pulverizers can not fully satisfy people's increasingly high requirements for ultra-fine powder materials, and the airflow crushing equipment has a tendency to replace mechanical pulverizers in the production of ultra-fine powders.
In order to meet the higher requirements of particle size, purity, and particle size distribution of powder products for the development of information technology, biotechnology, and new material technologies, research on ultra-fine jet crushing technology should improve and optimize ultra-fine jet crushing on an existing basis. Equipment, development of new types of equipment, and emphasis on the matching design of crushing and grading systems.
In addition, there are not many large-scale equipments in China. In the above-mentioned ultra-fine airflow crushers, compared with the fluidized bed collision air-flow crushers, there are obvious advantages. Therefore, theoretical research should be strengthened to guide the design of crushing equipment. Since the biggest drawback of the airflow mill is its low energy utilization, it should seek ways to reduce energy consumption and increase energy efficiency.