Laboratory Jet Mill

Laboratory Fluidized Bed Jet Mill

Laboratory fluidized bed jet mill is a type of grinding equipment used in the pharmaceutical, chemical, and food industries. It is designed to grind particles into fine powders by using high-speed jets of air to create a fluidized bed of particles.

The fluidized bed jet mill consists of a grinding chamber, a fluidizing gas supply, and a classification system. The grinding chamber is a cylindrical vessel that contains the particles to be ground. The fluidizing gas supply is used to create a high-speed jet of air that fluidizes the particles in the grinding chamber. The classification system is used to separate the fine particles from the coarse particles.

Working principle of laboratory fluidized bed jet mill

After cooling, filtering, and drying, the compressed air forms a supersonic airflow through the nozzle and enters the crushing chamber. The accelerated materials meet at the intersection of the spray airflow of several nozzles, resulting in a violent collision, friction, and shear to reach the particle Finely crushed. The crushed material is transported to the impeller classification area by the rising airflow. Under the action of the centrifugal force of the classification wheel and the fan suction, the coarse and fine powder is separated. The coarse powder returns to the crushing room according to its gravity to continue crushing. The airflow enters the cyclone collector, the fine dust is collected by the bag filter, and the purified gas is discharged by the induced draft fan.

Technical advantages of laboratory fluidized bed jet mill

  • The grinding process is completed by the collision of the material itself, completely self-grinding, with minimal wear on the equipment, suitable forgrinding of various hardness materials.
  • The grinding form of fluidized bed collision can better maintain the shape of particles.
  • Low temperature and medium-free grinding, suitable for heat-sensitive, low-melting, sugar-containing, and volatile materials.
  • High-temperature and high-pressure grinding to achieve higher injection speed, lower dynamic viscosity, and highergrinding fineness and  efficiency.
  • Inner, classifying wheels, nozzles and other key components can be protected by wear-resistant materials such as alumina, zirconia, and silicon carbide, and organic materials to avoid contact with metal during the entire grinding process and obtain high-purity products.
  • The grading wheel is installed horizontally, which can better control the fineness of products with low density and produce finer products.
  • Inert gas closed-circuit cycle/explosion-proof design, which can meet the grinding of flammable, explosive, easy to oxidize, and easy to absorb moisture materials.

Laboratory fluidized bed jet mill technical parameters

parameter/ Model MQW03 MQW06 MQW010 MQW20 MQW30 MQW40 MQW60 MQW80 MQW120 MQW160 MQW240
Feeding Size(mm) <1 <2 <2 <3 <3 <3 <3 <3 <3 <3 <3
Production Capacity(kg/h) 0.3~10 10~150 20~300 40~600 100~900 200~1200 500~2000 800~3000 1500~6000 2000~8000 4000~12000
Particle size(D97:μm) 3~45 3~45 3~45 3~45 3~45 3~45 3~45 3~45 3~45 3~45 3~45
Classifier motor (kw) 2.2 3 5.5/7.5 7.5/11 11/15 15/7.5x3 7.5x3 11x3 15x3 15x4 15x6
Air consumption(m³/min) 3 6 10 20 30 40 60 80 120 160 240
Air pressure(Mpa) 0.6~1 0.6~1 0.6~1 0.6~1 0.6~1 0.6~1 0.6~1 0.6~1 0.6~1 0.6~1 0.6~1