Analyze the operation principle of various components of the airflow pulverizer
Airflow grinding temperature without medium smashing: low melting point, thermal sensitivity, fibrous, polymer polymer powder; flammable, explosive, easy oxidized material for ultrafine processing Moques hardness; inert gas Realize the closed circuit cycle, the inert gas circulation is used.The fluidized bed airflow pulverizer is compressed air to the pulland to accelerate the acceleration gas flow, and the material is transported into the pulverized zone so that the material is fluidized (the airflow expansion is suspended and the collision of each other) Therefore, each particle has the same motion state.
Air supply. This is the driving force for the pulverization process of the airflow pulverizer. The requirements for compressed air can be between 0.7-0.8 MPa, maintain pressure stability, even if there is fluctuations, but the frequency should not be too high, otherwise the quality of the product will affect the product. Secondly, the quality of gas is required, and the compressed air should be purified, and the water, oil mist, dust is removed, so that the pulverized mineral material is not contaminated, especially the material with high purity Crushing is higher. feedstock supply. It is to boost the raw material in the raw material in the raw material, and then feed the raw material into the pulverization chamber of the gas flow, the particle size of the material is strong, usually 325 purpose raw materials. However, in practice, our processed raw materials from 80 goal to 325 destination mineral materials also achieve good results. The speed of the raw material conveyor delivery feedstock is relatively stable with the concentration of the raw materials and air mixing of the pulverization chamber, and we use such a method to achieve the ultrafine powder yield Zui when pulverization. Crush and classify. The comminuted interior is symmetrically mounted with two pairs of nozzles, and the compressed air forms the supersonic airflow to form a raw material to speed up, colliding with each other, pulverizing the raw material into ultrafine powder, pulverized effect, and nozzle inner diameter shape, distance, symmetry, and raw materials. And the mixing concentration of the air is related. The inner diameter shape of the nozzle determines its ZUI speed, distance, and determines the raw material acceleration path. Whether the speed is ideal. Raw materials and air mix concentrations also affect product particle size and yield.
The grading of the airflow pulverizer is carried out by a rapid rotation. The classification wheel is fixed on the center of the circle "iron barrel" at the bottom of the direct-connected motor, and the motor drives high-speed rotation, the opening and the pipe portions of the micro-powder collection system are opposed, and keep a certain gap can not be too large, otherwise it will not SortedThe coarse powder enters the pipeline from the gap to the fine powder collection system, affecting the product quality, in order to prevent such events, air seal processing at the gap. The graded wheel is mounted with a blade, and the slit between the blades is a channel sorting fine powder. The pulverized fine powder flutters with the air, and the ultrafine powder is felt to the outer wall under the centrifugal force of the graded wheel due to the genus of the grain size, and the large particles are flying to the outer wall. . Adjust the speed of the grading wheel, you can get different particle size products.
Control of mixed concentrations of raw materials and air to the pulverization chamber of the gas flow pulverizer, can be controlled by a capacitive material density control switch or sensor. This machine utilizes the current size control of the graded wheel drive motor, which is simple, feasible, easy to control. When the material and air mixing concentration increases, the dust density of the gas flow is increased, the dust of the hitting the grading wheel increases, so that the current of the drive motor increases, and the current reduction of the motor is reduced, the size of the motor is used, controlling the feed material How much, the mixing concentration of the material and air can be adjusted to Zui. When the drive current is increased immediately, the transfer is stopped to achieve the dynamic balance of the powder and the transfers to ensure the stability of the product quality.
The airflow pulverizer collection system consists of a cyclone separator and dust collection. Ultrafine powder enters the cyclone separator by sealing the pipe, and the airflow rotates in the cyclone separator, and the ultrafine powder is dropped, and the package is discharged from the discharge system is the finished product. The cyclone can be used for primary or two. The airflow fluttered from the whirlwind separator, and some dust entering the dust collector, through the dust on the bag, its exhaust gas is extracted under the action of the air, the dust content is very small, in order to prevent these dust from being discharged into the atmosphere, We also add a set of dust filters, recover dust, and exhausted into the atmosphere after exhaust gas zui. After many inspections of the environmental protection department, the amount of dust-defined dust is much lower than the dust emission standards stipulated in the national environmental protection department. The entire production process is automatically controlled by the control cabinet, and the control cabinet is supplied to the entire production motor (excluding the gas source electricity), and can control parameter adjustment, automatic start and stop, automatic protection, fault alarm, and automatic shutdown. Guarantee the stability of equipment safe operation and product quality.
As the world's big country, China has played a positive role in maintaining world peace and regional stability, and assumes great responsibility and obligation. As a large industrial powder developed in the Chinese economic waveEquipment manufacturing enterprises, AlPa powder technology will also assume corporate social responsibility, and continue to join hands with more companies to my country's strong troops, and add bricks in the road of strong countries.
