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Detailed introduction of Raymond mill: Blade + grinding roller + grinding ring to produce fine powde
  • 2022-05-16 16:22
  • HCM

HC series super large.jpg

Hongcheng Raymond mill

1. Introduction to Raymond Mill: Raymond mill, also known as suspension roller mill or pendulum mill, is widely used in metallurgy, building materials, chemical industry, mining and other fields. No more than 8% of the mineral material is ground and processed, and the fineness of the finished product is generally between 150 mesh and 800 mesh.


The whole set of Raymond mill generally consists of main engine, analyzer, piping device, blower, finished product cyclone, jaw crusher, bucket elevator, electromagnetic vibrating feeder, electric control motor, etc. Among them, the main engine of Raymond mill is composed of a frame, an air inlet volute, a blade, a grinding roller, a grinding ring, a cover, and a motor.


2. Basic working principle of Raymond mill: After the material is crushed (jaw crushing, counterattack crushing, etc.) to the required particle size, the material is sent to the storage hopper by the elevator, and then sent to the thunder evenly and continuously by the vibrating feeder. In the grinding chamber of the main machine, due to the centrifugal force during rotation, the grinding roller swings outward and is pressed against the grinding ring. The shovel scoops up the material and sends it between the grinding roller and the grinding ring. The fine powder after the material is ground is brought into the analyzer for sorting with the circulating air of the blower, and the material with excessive fineness falls back for regrinding. is the finished product.


3. Important parameters of Raymond mill:

Raymond mills are divided into 3R (3 rollers), 4R (4 rollers) and 5R (5 rollers) according to the number of grinding rollers. The main technical parameters are the inner diameter of the grinding ring, the number of grinding rollers, the size of the grinding rollers, the speed of the main shaft, the maximum feeding particle size, the product particle size, the production capacity, the diameter of the impeller of the classifier, the air volume of the fan, the power of the main engine, the weight and shape of the equipment, etc.


4. Advantages and application fields of Raymond mill: Raymond mill has the advantages of stable performance, simple process, convenient operation, relatively small footprint, strong systematicness, and strong completeness. Packaging can become an independent production system by itself. Widely used in calcite, marble, chalk, limestone, talc, wollastonite, gypsum, hard kaolinite, clay, feldspar, barite, bentonite, graphite, tremolite, illite, sericite and other non-metallic materials Mineral powder processing.


5. Solutions for the decline of Raymond mill output:


5.1 Check the powder lock

If the powder lock of the Raymond mill is not tightly sealed, the phenomenon of powder sucking will occur, resulting in the phenomenon of no powder or less powder. It is very important to regularly check the tightness of the powder lock to ensure the stable powder output.


5.2 Check the analyzer

The function of the Raymond mill analyzer (powder separator) is to analyze the size of the finished powder, whether it meets the finished product standard, and decide whether the powder needs to be sanded again. If the blades of the analyzer are severely worn, it will affect the effect of classification. If the powder is too coarse or too fine, new blades can be replaced.


5.3 Check the fan

The air volume of the Raymond mill has a direct impact on the powder output. If the air volume is too large, the powder output is too coarse, while the air volume is too small and the powder output is too fine. It is necessary to adjust the air volume of the fan according to different materials to correct the powder particle size.


5.4 Check the blade

The blade of Raymond Mill is responsible for scooping up the material. When the blade is worn out, the shovel will be affected, which will indirectly affect the powder output. Timely replacement of the blade can ensure the powder output efficiency and the normal operation of the equipment.


6. Raymond mill equipment upgrade and development


6.1 One upgrade of Raymond mill

More than 100 years have passed since the invention of Raymond mill, and major improvements in structure and internal classification occurred around 2000, such as increasing the quality of the grinding roller, increasing the pressure of the grinding roller, increasing the swing speed of the grinding roller, and improving the classification fineness of the sorting machine. and precision, while improving the hardness and strength of grinding rollers and grinding rings. These improvements significantly increase the production capacity of traditional Raymond mills and reduce energy consumption and wear per unit of product. In addition, by increasing the number of classifier blades, increasing the speed of the classification impeller, or configuring a turbo air classifier for secondary classification, the product fineness can be improved, and finer powders such as 600 mesh (20 μm) and 800 mesh (15 μm) can also be produced. .


6.2 Second upgrade of Raymond mill

From an ideal state, grinding equipment with large processing capacity, high sorting efficiency, low energy consumption, energy saving and environmental protection will be more favored. As far as Raymond mills are concerned, material grinding accuracy has always been a technical difficulty in equipment improvement and one of the main bottlenecks in its development.


7. Recommended by Raymond Mill

There are many domestic Raymond mill companies, and powder processing companies still need to work hard to choose a high-quality Raymond mill. To quickly choose a good Raymond mill, you must have a certain understanding of the equipment company, and the company you choose must be professional enough. Guilin Hongcheng Mining Equipment Manufacture Co., Ltd. is a Raymond mill manufacturer with nearly 30 years of experience in Raymond mill production. The HC series and HCQ series of new Raymond mills we developed and produced have been widely used in domestic and foreign markets. For more information, please contact me.

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