raymond mill

the development of Raymond mill

From 1906 to today, Raymond mill development than a century, was originally used as a coal grinding equipment Raymond mill , continuous development and innovation , has been widely used in various industries .

we look over a hundred years Raymond mill history of the development , which has been constantly adapt to a variety of needs, but also because the process is simple, reasonable structure, easy maintenance , which is widely favored by the milling industry , Raymond mill in milling industry is essential.

Raymond mill has a widely application materials

Some entrepreneurs had only a small artisanal business , and now form the entire export industry , Raymond has repeatedly broadened the scope of the processing for materials from a single limestone rock minerals expanded to hundreds of species . Raymond mill is now ready to apply barite , calcite, feldspar , talc , marble , limestone, ceramics , glass, etc. Mohs hardness of not more than 7 and humidity below 6% of non- flammable milling and processing mining, chemicals, building materials , metallurgy and other industries than 280 kinds of materials, product size in the range 80-12000 mesh of arbitrary regulation . These high-performance environment with Raymond adaptability also developed slowly in people continue to be improved !

raymond mill structure and working principle

raymond mill working principle

The whole structure of Raymond mill is composed of a host machine, analysis, plumbing, air blower, finished cyclone separator, jaw crusher, bucket elevator, electromagnetic vibration feeder, electric motors and other components. The host is composed of a frame, Raymond mill inlet volute, blade, grinding, grinding ring, a cover casing and a motor.

The whole working process of Raymond Mill (the process of grinding material): the bulk materials by jaw crusher to desired size, by the elevator will be material to the hopper, the vibrating feeder evenly and quantitatively and continuously into the indoor host grinding grinding, grinding after the powder is fan airflow. Through the analysis of machine grading, fineness of powder will meet with the gas flow through the pipe into the large cyclone collector, were isolated and collected, then powder tube is finished powder. The airflow from large cyclone collector inhalation top return air duct blower. The air current of the whole system is a closed loop, and circulation in the flow of positive and negative pressure condition.

In the grinding chamber internal grinding material with certain water content, the grinding heat generated in grinding chamber gas evaporation changes the gas flow rate, and the pipeline connection is not tight outside the gas is inhaled, the circulating air volume increase, is this by adjusting the fan with the host legacy of pipe to flow balance, and the gas into the small cyclone collector excess, the fine powder gas into the collection down, then the cyclone collector upper exhaust pipe into the atmosphere, or into the dust collector with the exhaust gas purification.

main wear parts of Raymond mill

1.Plum Frame

raymond mill Plum frame
Plum frame is one of the main parts of Raymond mill, it is an important component of the internal structure of supporting a whole host of. Liming heavy industry production plum frame of advanced technology, the use of high hardness, good abrasion resistance material, such as the hard nickel cast iron, high chromium cast iron, medium manganese ductile iron. In addition to material, plum, aircraft manufacturing and processing method of Raymond mill is also very important, such as hard nickel iron metal mold centrifugal casting roll sleeve or, hardness is 700HB, sand casting of 500HB. Roller connecting place is the plum frame. Plum frame below is the blade cylinder, blade cylinder in the plum frame is fixed, there is a big force bearing below mill host, so the grinder spindle can not fall, plum frame in the spindle with safety nut.

2.Grinding Ring

Grinding ring is directly in contact with the material parts, grinding ring Liming heavy industry production of Raymond Mill in general there are two main kinds of material:

raymond mill ring

The 65Mn: grinding ring in the use of this material, the durability is improved obviously. It is characterized by high hardness, good wear resistance, magnetic. Mainly used for product in powder processing of iron. The product after normalizing and tempering heat treatment, mechanical performance is improved greatly, make the product not only has good wear resistance, but also greatly improve the toughness.

The Mn13: compared with 65Mn, the grinding ring in the Mn13 material after casting, in life has changed. After the pouring of water toughening treatment. Water toughening treatment after casting with tensile strength, toughness, high plasticity and no magnetism. The grinding ring is more durable. Subject to severe shock and strong pressure deformation in the using process, surface hardening, and martensite formation, thus forming the wear surface layer high, while the inner layer to maintain excellent toughness, even wear very thin, can bear a larger impact load.

3.Grinding Roller

raymond mill grinding roller

Raymond mill host another vulnerability is grinding roller, under normal circumstances, Raymond mill for grinding roller in use for some time, this according to customer's materials, frequency of use and other factors to determine whether the operation. To limestone as an example, if the same operating conditions, the quality of the grinding roller but hard, then there will be excessive wear, the service life is greatly reduced. As a result, mill roll material is also one of the most important factor in deciding the quality of equipment manufacturers of Raymond mill.

Raymond Mill Main Features

  • 1. pressure, powder and more;
  • 2. low noise and vibration;
  • 3. small raymond mill grinding ring and even roller wear, long life, is common Raymond 3-5 times;
  • 4. small raymond mill suitable for machining hard materials;
  • 5. micronized low iron content;
  • 6. continuous operation, do not affect the oiling roller bearing chamber during operation;
  • 7. power consumption small quantity, high efficiency, easy installation and maintenance;
  • 8. Small raymond mill no blade feed, low failure rate within the mill.

Technical Data

Model YGM8314 YGM9517 YGM4121
Roller Quantity(pcs) 3 4 5
Roller Diameter(mm) Φ270×140 Φ310×170 Φ410×210
Ring Diameter(mm) Φ830×140 Φ950×170 Φ1280×210
Rev   130 103
Max.Feed Size 20 25 30
Discharging Size 1.6-0.045 1.6-0.045 1.6-0.045
Capacity 1.2-4.6 2.1-8 5-11
Machine Size 5300×4100×5200 7100×5900×7900 9200×7250×9700

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