Air Classifier For Mineral

Air Classifier For Mineral

As China vigorously promotes industrial construction, more and more machines are put into use, and the air classifier in the material processing industry is an important equipment. It adopts high-speed airflow and the high temperature of its extension room. It is divided and graded with animal materials. In long-term and high-intensity working environment, the machine is prone to some problems. If these problems are not solved in time, it will affect the use of the machine. Lifetime thus affects industrial production tasks. When we use the machine, we should pay attention to the following points, which are used to maintain the air classifier, to extend the service life of the machine, and to bring stable and efficient production operations. The maintenance details of the air classifier of the horizontal air classifier are as follows: 1. The machine should be cleaned from time to time, but the time should not be too long or too short. It should be noted that when cleaning, the motor and bearing should be Keep the seal from water. 2. When the parts are replaced, or when the equipment is being repaired and maintained, it must be carried out in the state of power failure, and the warning signs for maintenance should be attached. 3. Lubrication of the bearing is required. Every time after work, it is necessary to check the use of the bearing and lubricate it in time to prevent sudden failure of the bearing in the subsequent work.

Airflow classification process

The classification of the airflow is based on the centrifugal force, gravity, inertial force, etc. of the particles of different particle sizes in the gas (usually using air), and different motion trajectories are generated, thereby realizing the classification of particles of different particle sizes. The air classifier can be divided into a static classifier and a dynamic classifier according to whether it has moving parts.

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The development direction of air classifier

  • (1) Large and refined
  • With the continuous expansion of the ultra-fine powder market and the expansion of production scale, the demand for large-scale superfine pulverization and fine grading equipment will continue to increase in the processing of ultra-fine powder. The use of large-scale equipment can reduce the energy consumption per unit of product and simplify Process and reduce floor space, thereby reducing equipment investment and production costs per unit of product.

  • (2) The vortex air classifier gradually dominates the market
  • The vortex air classifier is widely used in construction, mineral processing, fine chemicals, special ceramics and other industrial fields due to its simple structure, adjustable graded particle size and wide adaptability.

  • (3) Automation control
  • Industrial control automation technology is developing in the direction of intelligence, network and integration. The automatic control of airflow classification improves the production efficiency, reduces the labor intensity of workers, improves the overall automation level of the powder processing industry and the core competitiveness of enterprises. It is of great significance.

Air classifier - working principle

The rotor impeller of the air classifier is a compound bidirectional centrifugal type. The impeller rotates at a high speed, forming a negative pressure zone in the lower part of the impeller. The air in the classifying cylinder enters through the lower air inlet of the impeller, and is discharged from the outlet along the upper impeller flow channel. Under the action, the airflow rotates upwards, and the airflow in the axial direction and the circumferential direction flows inward through the upper space of the grading disc, and enters the lower impeller through the upper inlet of the impeller, and is discharged from the lower impeller outlet, and the discharged airflow rotates downward in the cylinder. After the crucible passes through the middle of the inner cylinder toward the lower air inlet of the impeller, so that the circulation flows to form a cross-circulating airflow.

The coarse-grained material slides from the wall of the control ring to the coarse material collector under the action of the cross-flow, and the fine powder is transported to the lower fine-particle cyclone collector with the airflow of the central suction port above the rotor, and the raw material is divided into The two parts are thick and thin, and the remaining air is sucked by the central suction port under the rotor, flowing through the blade and jetting the fine ring. The control ring flows back from the periphery of the control ring to the upper middle suction port of the rotor to form a continuous automatic cycle. Excess air brought in by the material and due to the higher temperature of the classification chamber, the air is expanded and the excess gas is discharged from the residual air outlet to ensure the balance and stability of the airflow in the classification chamber.