Tongli raymond mill Introduction

Raymond mill is a kind of grinding equipment widely used in mines, cement plants and chemical plants, and it is one of the important equipment for deep processing of non-metallic minerals. Because of its stable performance, strong adaptability and high-cost performance, Raymond mill is mainly used for barite, calcite, potassium feldspar, talc, marble, limestone, dolomite, fluorite, lime, activated clay, activated carbon, bentonite, kaolin, Cement, phosphate rock, gypsum, glass, bluestone, petroleum coke, chemical raw material insulation materials, etc. More than 280 kinds of non-flammable and explosive minerals, chemicals, construction and other industries with a Mohs hardness not greater than 9.3 and a humidity below 6% High-fine powder processing of materials.

Tongli raymond mill structure

The structure of Raymond mill is composed of main machine, analyzer (powder separator), pipeline device, blower, finished product cyclone separator, jaw crusher, bucket elevator, electromagnetic vibrating feeder, electric control motor, etc. The main machine of the Raymond mill is composed of a frame, an air inlet volute, a blade, a grinding roller, a grinding ring, a casing and a motor.

Mainframe: The mainframe is the core component of the Tongli Raymond mill. It houses the grinding roller assembly, grinding ring, and other components. The mainframe is responsible for supporting these parts and transmitting the grinding force to the material being processed.

Grinding Roller Assembly: This assembly consists of a set of grinding rollers that rotate around a central axis. The grinding rollers exert pressure on the material placed on the grinding ring. The material is crushed and ground between the rollers and the grinding ring.

Grinding Ring: The grinding ring is a circular track that surrounds the central axis of the mill. It's fixed to the mainframe and provides a surface against which the grinding rollers press the material. The material is crushed and ground as it passes between the grinding rollers and the grinding ring.

Blower: The blower is responsible for creating the airflow that carries the ground material away from the mill and into the separator. It also helps to regulate the circulation of air within the mill, which is important for maintaining proper operation and controlling temperature.

Analyzer: The analyzer, also known as the classifier, is responsible for controlling the fineness of the final product. It separates the fine particles from the coarse ones and directs them to the appropriate outlet. This helps to achieve the desired particle size distribution of the ground material.

Cyclone Separator: The cyclone separator is used to separate the fine particles from the airflow, directing them to the collector or bag filter. This ensures that only the desired particle size range is collected as the final product, while larger particles are returned to the grinding chamber for further processing.

Electromagnetic Vibrating Feeder: The feeder is responsible for supplying a steady and controlled amount of material into the mill. It helps to maintain a consistent feed rate, which is crucial for achieving stable and efficient grinding.

Transmission Device: The transmission device, often a system of gears or belts, is responsible for transmitting the rotational motion from the motor to the grinding rollers and other moving parts of the mill.

Electric Control System: The electric control system includes various components like control panels, switches, and sensors that allow operators to monitor and control the operation of the Raymond mill. It enables adjustments to be made to various parameters, such as feed rate, airflow, and fineness of the final product.

Overall, the structure of a Raymond mill is designed to facilitate efficient grinding and processing of various materials, ensuring consistent performance and high-quality output.

Tongli raymond mill design principle

The working principle of Raymond mill is that the grinding roller is tightly rolled on the grinding ring under the action of centrifugal force, and the material is scooped up by the spatula and sent to the middle of the grinding roller and grinding ring, and the material is broken into powder under the action of the rolling force, and then Under the action of the fan, the powdered material is blown up and passed through the analyzer, and the material that meets the fineness requirement passes through the analyzer, and the material that does not meet the requirement returns to the grinding chamber to continue grinding, and the material that passes through the analyzer enters the cyclone separator for separation and collection. The exhaust adopts industrial filter cloth to isolate the exhaust air into powder at one time.

High Efficiency and Low Energy Consumption: Raymond mill is designed to achieve high efficiency in grinding processes while minimizing energy consumption. The grinding roller and grinding ring are designed in a streamlined way to ensure smooth material flow and reduce energy loss due to friction.

Centrifugal Force and Grinding Rollers: The grinding rollers are tightly pressed against the grinding ring by centrifugal force generated by the rotation of the main shaft. This ensures a consistent and efficient grinding process. The material is fed between the grinding roller and grinding ring, and as the rollers rotate, they crush and grind the material.

Airflow and Separation: A high-efficiency turbine classifier is integrated into the design of Raymond mill. This classifier controls the particle size of the finished product by adjusting the airflow and separating the finer particles from the coarser ones. This ensures that the desired particle size distribution is achieved.

Adjustable Grinding Clearance: The gap between the grinding roller and grinding ring can be adjusted to control the fineness of the final product. This allows for customization according to the specific requirements of different materials and applications.

Stable Operation and Reliability: Raymond mill is designed with a strong emphasis on stable and reliable operation. Components are made from high-quality materials to ensure durability and reduce the need for frequent maintenance.

Dust Collection and Environmental Considerations: Raymond mill is equipped with a dust collection system to minimize the release of fine particles into the surrounding environment. This ensures a cleaner and safer working environment.

Specifications of tongli raymond mill

Note: * Mill diameter refers to the inner diameter.

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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 difference between Raymond mill and vertical roller mill?

Raymond mill and vertical roller mill are both commonly used grinding equipment for various kinds of minerals and materials processing. However, they have different working principles, structures, and applications.

Raymond mill operates with a central shaft-driven system. The grinding rollers rotate around the central axis, and the grinding ring is fixed in place. Material is fed between the grinding roller and the grinding ring, and as the rollers rotate, they crush and grind the material. The ground material is carried by the airflow into the classifier for separation. The grinding mechanism in Raymond mill involves a grinding ring and a set of rotating grinding rollers. The grinding action is mainly driven by centrifugal force generated by the rotation of the grinding rollers. Raymond mill has a larger footprint compared to vertical roller mill. With similar capacity, a Raymond mill occupies more space. Raymond mill is often used for fine powder processing of various minerals and materials, such as ore, gypsum, talc, calcite, limestone, marble, and ceramics. Raymond mill has a simpler structure and is relatively easier to maintain and repair.

Vertical roller mill operates with a vertically oriented grinding table. The material is fed into the mill between the grinding table and the rollers. The rollers press down on the material, and the grinding process occurs between the rollers and the grinding table. The ground material is conveyed by the airflow to the classifier for separation. In vertical roller mill, grinding is carried out primarily through compression and shearing forces between the grinding table and the rollers. The material is crushed as it passes between the rollers and is further ground as it is pressed against the grinding table. Vertical roller mill is compact, and it takes up less space, making it easier to fit into existing production lines. Vertical roller mill is primarily used for grinding and processing of cement clinker, slag, coal, and minerals. Vertical roller mill has a more complex structure and requires more frequent maintenance and repair due to the wear and tear of grinding elements.