Ultrafine grinding refers to the operation technology of crushing material particles above 3 mm to 1-25μm microns by using mechanical or hydrodynamic methods to overcome the internal cohesion of solids. The cell is the basic unit of plant structure and function, the cell belongs to the micron level, the plant cell is several to dozens of microns, the diameter of most higher plant cells is usually about 10-200 microns. Plant cells vary widely in size and generally must be seen under a microscope. The existing superfine grinding production equipment commonly used at home and abroad and the new superfine grinding equipment on the market mainly include grinding mill, mechanical impact mill and air flow mill.
At present, the air mill mainly includes five basic types: horizontal disc air mill, circulating tube air mill, jet reverse air mill, impact plate target air mill, fluidized bed air mill , low temperature grinding equipment and other modern processing equipment is widely used.
The most representative of the ultrafine mill are high-speed rotary mill, ball mill, separate grinding ultrafine mill, ultrafine vibration mill, air flow mill, tower mill and the newly developed liquid flow mill, jet mill, ultra-low temperature mill, supercritical mill, ultrasonic mill.
Ultrafine vibration mill and ball mill is similar, a medium is a grinding rod, a medium is a sphere, usually divided into cylindrical or live groove. It is characterized by high filling rate of the medium, high frequency of action per unit time, so its vibration energy is large, fineness is also good, energy utilization rate, cleaning is not very convenient.
Separate grinding ultrafine grinder, the use of air separation, heavy grinding, cutting materials to achieve the form of dry material ultrafine grinding equipment. It consists of a cylindrical grinding chamber, grinding wheel, grinding rail, fan, material collection system, etc. The roller in the silo rotates and rotates, the material is mainly grinding under heavy pressure, and the mixing force supplemented by the shear principle makes the material crushed to a certain fineness. This crushing principle can ensure that the superfine powder standard and even higher fineness are achieved without damaging the material, and the working temperature in the silo is relatively low without adding cooling facilities. Never exceed 45° to ensure that the material will not deteriorate due to high temperature. The crushed material is brought out of the crushing chamber through the negative pressure air flow caused by the fan, and enters the material collection system, filtered through the filter bag, the air is discharged, the material and dust are collected, and the crushing is completed. The separation grinding mill is based on the ancient Chinese medicine research ship, also known as "medicine roller", is a tool for human double-foot treadle wheel, using the grinding force of the wheel and the hull friction to crush the drug, it has stronger grinding force than the mortar. Separate grinding superfine mill is developed from the Chinese medicine research ship, through the grinding wheel repeatedly rolling, grinding wheel both grinding function, and shear function, while the pressure rod increases the pressure, forming a heavy pressure, grinding wheel repeatedly heavy grinding and shearing, through the controller, the particle size of the material successfully separated by air, while the heat is discharged, the finished material collected to the aggregate tank, Aggregate is divided into primary aggregate and secondary aggregate. Primary aggregate is a cyclone aggregate, a large amount of material is collected in primary and a small amount enters secondary. Aggregate tank, secondary aggregate to complete the remaining material collection. Product particle size D-98 in 1-70 μm micron {about 200 mesh -13000 mesh}, uniform particle size, equipped with high-performance fine classifier. ZKY series ultrafine crusher can be widely used in Chinese medicine, Western medicine, pesticide, biology, cosmetics, food, feed, chemical industry, ceramics and other industries of dry material ultrafine crushing needs. Especially for fiber (such as Chinese herbs, ganoderma lucidum, etc.), high toughness (animal horn, cotton, etc.), high hardness (such as diamond, ceramics, etc.) and other animal and plant materials crushing effect is more. Easy to operate and clean.
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