Grinding Mill Manufacturer With Reliable Technical Team

HD medium-size raymond grinding mill is innovative product upgraded on the basis of traditional grinder by our engineer team through years reaserch and study for the customers cases .The medium-size grinding mill with feature of high performance ,high stablility,high capacity , low vibration and low noice ,upscale and energy-efficient covers a number of technology patents and plays a large advantage and function in the field of medium-scale power-makeing project.

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The whole structure of Raymond mill is composed of a rolle mill,Driving system, Classifier, pipeline device, blower, finished cyclone collector , jaw crusher, bucket elevator, electromagnetic vibration feeder, electric motor .
the Raw materials by jaw crusher less than 20mm and lifted by the elevator to the storage hopper, then after vibrating feeder evenly and quantitatively and continuously into the Main machine grinding, grinded powder was blow by airflow away. Through the classifier separated, consistent with the powder fineness with air flow through the pipeline into the cyclone collector, were isolated and collected, and then by the powder in tube is discharged into the finished powder. Air flow from large cyclone collector is arranged at the upper end of the air return pipe suction blower. The air current of the whole system is a closed loop, and flow circulation in the positive and negative pressure condition.
Material Available
For Nonflammable,non-explosive and brittle materials With Mohs hardness less than 7.moisture content is less than 8%,.
Such as :Limestone, calcite, fly ash, calcium carbide, kaolin, calcium carbonate, coal gangue, gypsum, grain slag, Mn ore, coal dust, bentonite, barite, marble, talc, refractory material.


It’s provides efficient control of Max product size(80-400mesh), with minimal power resulting in cost-effective production. The system offers maximum flexibility and control over mill variables, delivering controlled product quality at minimum operating costs.
Squirrel-cage Type Separator(Classifier) eliminate coarse powder spilling

It is adopts Squirrel-cage type powder separator, which is of relatively stable velocity field, high powder separating precision, high powder separating efficiency and accurate cutting diameter; in addition, Over-size steps sealing is connected with cage rotor, which can effectively eliminate the “coarse powder spilling” phenomenon.
This technology got patent certification in 2011.

a. The final product passing rate can be reach to 97% -99% commonly
b. The final product size can be at the range to 20micron -180micron (80-400mesh)

Capacity/Production increased 30% higher than traditional raymond mill
HD medium-size grinding mill working as 4 rollers ,the blower Air enters from below the grind ring and flows upward carrying fines to the classifying section. The classifier allows the sized material to pass to the product collector and returns oversized particles to the grinding chamber for further processing. The mill operates under negative pressure conditions, minimizing mill maintenance and plant housekeeping while maximizing the service life of major mechanical components.

Quality assurance

a. The main parts are made of thicker and high manganese steel,the wearing parts are made of wear-resisitant mateiral .It’s make the mill runs smoothly and stablity ,wear resistance performs well.
b. Optimizating the pipes ,duct and blower ,reduced the windage and decreased the pipes abrasion to ensure the final production increasing.
c. Flexible choices of driving system,soft-connection are available to ensure the mill at best performance

Custom engineered systems

Each roller mill system is custom designed to achieve the best solution for your processing application. The mill, feeder, classifier, blower, cyclone, dust collector and other system components are selected to meet the requirements and characteristics of the material processed.



Model Roller size (mm) Max.Feeding Size(mm) Speed of Main Mill(r/min) The Final Size(mesh) Capacity(t/h) Main Unit Power(KW) Power of Air Blower(KW) Total weight(ton)
5R4128 Φ410*280 <20 112 80-400 4-12 90 90-110 28
HD1620 Φ450*300 <20 102 80-400 6-15 110-132 132-160 36
Note: capacity in the table is deduced with the standard of limestone as raw material, sieving rate is assumed to be 97%