Tongli Classifier/powder separator Introduction

T-sepax high-efficiency three-separation powder separator is a new generation of powder separator independently developed by Tongli Company. It adopts aerodynamics and reasonable system configuration. It is usually used in conjunction with a ball mill to greatly increase the output of the ball mill. In the cement grinding plant of the closed-circuit system Has a wide range of applications. Tongli T-sepax high-efficiency three-separation powder concentrator adopts the design principle of two-stage separation and three-stage dispersion. It can divide materials into three types according to particle size, coarse powder with a diameter greater than 150 microns, and medium powder with a diameter greater than 60 microns and less than 150 microns. Coarse powder and fine powder, the classification accuracy can reach more than 90%.

Tongli powder separator structure

The powder separator typically consists of a cylindrical enclosure with an inlet at one end for the mixture of ground cement particles and air, and an outlet at the other end for the separated particles. Inside the separator, there are various mechanisms to control the airflow and particle separation. These include a rotating rotor equipped with blades or vanes that create a centrifugal force, causing larger and heavier particles to be thrown towards the outer walls, while smaller particles are carried by the air towards the center.

Inlet: This is where the mixture of powders enters the separator. The powders might be introduced through a feed mechanism like a conveyor, funnel, or airlock.

Distributor: The distributor evenly distributes the powder mixture across the separator's width, ensuring consistent flow into the separation chamber.

Separation Chamber: The separation chamber is the main area where the actual separation process occurs. It contains mechanisms that utilize principles such as centrifugal force, gravitational settling, and air classification to separate particles based on their size and density.

Airflow System: Many powder separators use an airflow system to aid in the separation process. This can involve using fans, blowers, or air jets to create controlled air currents that help carry lighter particles and allow heavier particles to settle.

Classifying Mechanism: This part of the separator is responsible for classifying particles based on their size. It can include mechanisms like rotating vanes, blades, or screens with specific mesh sizes. The smaller particles pass through the openings, while larger particles are carried away for further processing.

Collection Bins: Once the particles are classified and separated, they are collected in different bins or chambers based on their size or density. These bins can be designed to collect fine particles, coarse particles, or particles of specific characteristics.

Outlet: The separated particles exit the separator through different outlets based on their classification. Fine particles might exit through one outlet, while larger particles exit through another.

Control System: Modern powder separators often include a control system that allows operators to adjust various parameters, such as airflow rate, rotational speed of the classifier, and other settings to optimize the separation process for different types of powders.

Tongli Powder classifier design principle

In the working state, the speed-regulating motor drives the vertical transmission shaft to rotate through the transmission device, and the material enters the powder selection chamber through the feeding port on the top of the powder separator, and then passes through the upper and lower cones of the medium and coarse powder collection cone. The pipeline in the middle falls on the spreading plate, and the spreading plate rotates with the vertical transmission shaft. Under the action of inertial centrifugal force, the material is evenly scattered to the surroundings. The dispersed material enters the high-speed airflow of the powder selection chamber through the air inlet of the external fan. Under the action, the coarse and heavy particles in the material are thrown to the inner wall of the powder selection chamber under the action of inertial centrifugal force. After the collision, it loses kinetic energy and slides down the wall and falls into the coarse powder collection cone. The rest of the particles are rolled up by the rotating and rising airflow. Throw it to the inner wall of the powder selection chamber, lose kinetic energy after the collision, slide down the wall, and fall into the coarse powder collection cone.After the medium coarse powder and fine powder pass through the large wind blade, under the action of the updraft, they continue to rise through the vertical guide blade and enter the secondary powder selection area. Under the action of the strong and stable planar vortex formed by the rotating cage rotor, the dust-laden airflow makes the medium-coarse powder thrown to the vertical guide vane under the action of centrifugal force and loses kinetic energy, falls into the medium-coarse powder collection cone, and passes through The medium and coarse powder pipe is discharged. The fine powder that meets the requirements enters through the cage rotor, enters the high-efficiency and low-resistance cyclone separator with the circulating air, and then slides down into the fine powder collection cone to become a finished product.

Advanced Design: The classification principle is advanced, combined with a variety of powder selection principles, the entire flow field is optimized by using aviation aerodynamic analysis methods.The main shaft of the powder separator adopts stepless speed regulation. The fineness adjustment is convenient, sensitive and reliable, and the adjustment range is wide.

Wear-resistant liner: The wear-resistant parts of the powder classifier, such as the spreading disc, the snail angle of the cyclone, the guide vane and the rotor classifying vane, are all made of wear-resistant materials or treated with anti-wear technology, and their wear rate is extremely low. Wear-resistant materials are used as lining, which effectively prolongs its service life.

Sealing device: The seal of the lower bearing of the main shaft adopts a new design scheme, which effectively solves the two important problems of dust entering the bearing and oil leakage of the lubricating oil, and effectively prolongs the service life of the lower bearing.

Vibration absor device: When designing the foundation of the powder separator, the principle of mechanical vibration reduction is adopted, so that the resonance frequency of the powder separator and the foundation is not close to the natural frequency of the powder separator, which fundamentally solves the vibration problem of the powder separator that has plagued the manufacturers for a long time.

Specifications of tongli powder sepatator

Note: * Capacity may vary according to specific material.

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Zhejiang Tongli Heavy Machinery Manufacturing Co., Ltd (Formerly known as Tongxiang Coal&Mining Machinery Factory) established in year 1958 is a member of the Chinese National Building Material Machinery Association. Tongli is on the vendor list of designated production enterprise of the Ministry of Coal Industry. ISO9001、ISO14001、ISO45001 certified, accredited as High-tech & new technology enterprise of Zhejiang Province. With 65+ years of experience, Tongli has earned first class R&D and manufacturing capabilities, dedicated to provide satisfactory manufacturing equipments for global customers.   

Industry Knowledge extension

What is separator’s application in cement plant?

A powder separator in a cement grinding plant is a device used to separate the fine particles from the coarse particles in the ground cement mixture. It is used to improve the quality and efficiency of the cement grinding process by ensuring that only the desired size of particles is sent to the final product, which is the cement.

In a cement grinding plant, the raw materials are ground down into a fine powder in a grinding mill, typically a ball mill or a vertical roller mill. This grinding process produces a mixture of fine particles (cement) and coarser particles (grit). The powder separator, also known as a classifier or a dynamic separator, is used to separate these particles based on their size and density.

The basic principle of a powder separator involves utilizing the centrifugal force generated by the rotation of the separator itself. The mixture of cement and grit is fed into the separator, and due to the centrifugal force, the finer particles are pushed towards the center and collected as the final product, which is the cement. The coarser particles, also known as grit or reject, are forced towards the outer edges and are returned to the grinding mill for further grinding. This separation process helps in achieving the desired particle size distribution of the final cement product

Powder separators are an integral part of cement grinding plants as they contribute to the efficiency and quality of the grinding process. They help in achieving the proper fineness of the cement, which is crucial for the setting and strength development properties of the final product. Additionally, efficient powder separators reduce the overgrinding of particles, which can save energy and reduce wear and tear on the grinding equipment.