Ceramic lined jet mill solves the problem of material adhesion
Because of their special material properties, some materials may adhere during the crushing process, which may cause blockage or agglomeration, which brings considerable trouble to the crushing work. After long-term accumulation of experience and continuous innovation and improvement, the ceramic-lined jet mill is specially introduced for the phenomenon of material adhesion.
The fluidized bed jet mill that uses high-hardness engineering ceramics to make all flow-through parts is an ideal crushing equipment for high-hardness, brittle materials, elastic plastic materials, agglomerated materials, and fibrous materials, such as zircon, alumina, rutile titanium White powder, zirconia, talc, kaolin, graphite, paint, pesticide, fertilizer, pollen, food raw materials and other materials are crushed.
Ceramic-lined jet mill not only has the advantages of general fluidized bed jet mills, but also, because the machine’s lining is made of high-strength, wear-resistant and high-temperature engineering ceramics, it can not only adapt to high temperature and overheating up to 400℃ The steam working medium does not pollute the material to be pulverized. It is a necessary equipment for high-quality ultra-fine pulverization. At the same time, the cost of airflow ultra-fine pulverization is mainly the cost of the pulverizing working medium, and the superheated steam working medium is higher than the compressed air working medium. The cost is reduced by a quarter. In addition, the superheated steam working fluid will not generate static electricity, so it will not cause wall sticking. Therefore, it is suitable for the production of some materials that will stick to the wall with compressed air at room temperature, such as: titanium dioxide .
The ceramic-lined jet mill is mainly composed of a feeding device, a crushing chamber, a discharge port, a steam distribution pipe and a nozzle. The material of the feed nozzle and the crushing nozzle is made of high-strength, wear-resistant and high-temperature-resistant special alloy, and the nozzle structure is supersonic design; the rest of the flow-through parts are lined with high-strength, wear-resistant and high-temperature engineering ceramics. The material venturi tube, ceramic middle ring, discharge port lining, ceramic upper cover and ceramic lower cover are made of high-strength reaction sintered silicon carbide; the steam distribution pipe and the main engine cover are all made of stainless steel and polished, and the whole machine has a beautiful appearance compact. The ceramic-lined jet mill can be used in conjunction with the jet classifier. According to the physical characteristics of the material and the purity requirements of the finished product, ceramic sheets are lined inside the equipment to increase wear resistance, reduce the impact of materials on the equipment, and increase the use of the equipment Life, and accurately control the iron content of the material in the crushing and grading process. Successfully solved a series of problems such as the adhesion of battery materials, poorly made, and inaccurate classification.
The working principle of the ceramic-lined jet mill: After being filtered and dried, compressed air is sprayed into the milling chamber at high speed through Laval nozzles, and the animal material is repeatedly collided and rubbed at the intersection of the high-pressure airflow to smash. The pulverized coarse and fine mixture is under negative pressure. The fan reaches the classification zone. Under the action of the strong centrifugal force generated by the high-speed rotating classification turbine, the coarse and fine materials are separated. The materials that meet the particle size requirements are collected by the cyclone separator and dust collector through the classification wheel, and the coarse particles drop to the crushing zone to continue. Shattered.
The ceramic-lined jet mill has the following performance advantages:
1. It is suitable for dry pulverization of various materials with Mohs hardness below 9, especially suitable for the pulverization of materials with high hardness, high purity and high added value.
2. The breakthrough of particle acceleration technology has greatly improved the pulverization efficiency and reduced the energy consumption. The pulverization is small, the particle shape is good, the particle size distribution is narrow and there are no large particles, and the product particle size D97=3-74 microns can be adjusted arbitrarily.
3. During the crushing process, the airflow temperature is reduced due to the rapid expansion of the airflow, which is especially suitable for the crushing of heat sensitive, low melting point and volatile materials.
4. The crushing of materials by collision with each other is different from the mechanical crushing which relies on the impact crushing of the materials such as blades or hammers, plus a full range of ceramic lining, so the equipment is less abraded and the product purity is high.
5. It can be used in series with a multi-stage air classifier to produce products with multiple particle sizes at one time.
6. The ceramic-lined jet mill has a compact structure, easy to disassemble and clean, and the inner wall is smooth and has no dead corners.
7. The entire system runs in a closed negative pressure, no dust, low noise, and the production process is clean and environmentally friendly.
8. The dust collector eliminates the problems of low negative pressure and sticking to the machine.