Raymond Mill

Raymond Mill

The Raymond Mill is a grinding machine, suitable for the preparation of various kinds of mineral powder and coal powder preparation.

Materials: Barite, calcite, potash feldspar, talc, marble, limestone, dolomite, fluorspar, lime, activated clay, activated carbon, bentonite, kaolin, cement, phosphate rock, gypsum, etc.
Applications: Metallurgy, chemical engineering, building materials, mining, pharmacy, cosmetics and other fields

Raymond Mill's Requirements on Materials

➤Moh’s hardness below Grade 7

➤Moisture below 8%

➤Non-combustible and non-explosive

➤Feed size ranging from 40 to 400meshes

Development History of Raymond Mill

1.First Generation of Raymond Mill

In 1906, C.V. Grueber founded a machinery factory in the southern suburbs of Berlin. Using his patents obtained in the United States, he produced the first Maxecon mill and used it as the coal grinding equipment for the MOABIT power station. The grinding power can reach 5TPH. In the past few years, nearly 600 units have been sold and used in different industries. In the same period, BEWAG planned to develop a coal mill with a higher output. After E.C. Loesche took over and headed the C.V. Grueber Machinery Plant, he decided to purchase the patented Raymond Centrifugal Ring-roller Mill from the United States to produce the first generation of Raymond Mill system.

However, practices proved that the fineness of finished products produced by Raymond Mills was dissatisfactory. Usually, the fineness was about 400 meshes, with very little material’s fineness up to 1000 meshes, which did not meet the requirements of refined development. During operation, Raymond Mills were always perplexed by high failure rate, large power consumption, unaffordable noises, large emission, low efficiency, unsatisfactory collection system, and inability to collect a large amount of fine powder. Hence, in order to overcome the shortcomings of Raymond Mills, SBM has launched three upgrade series of Raymond Mills, MB5X Pendulum Roller Mill, MTW European Grinding Mill and MTM Medium-speed Grinding Mill respectively. Compared with the first generation of Raymond Mills, these three types of grinding mills are more energy-efficient and environmentally friendly, have more sophisticated automatic control systems, and can help users to move toward refined and large-scale development.

2.Upgraded Raymond Mills Launched by SBM

MB5X Pendulum Roller Mill

MB5X Pendulum Roller Mill

According to accumulation and experimental analyses of on-site test data for more than thirty years, SBM, a Chinese grinding mill manufacturer, has researched and developed the fifth-generation pendulous hanging grinding mill – MB5X grinding mill. All non-combustible and non-explosive brittle mineral products whose Moh's hardness are below Grade 7 and water content below 6% could be ground by this grinding mill.

MTW European Trapezium Grinding Mill

MTW European Trapezium Grinding Mill

MTW European Grinding Mill is innovatively designed through deep research on grinding mills and development experience. It absorbs the latest European powder grinding technology and concept, and combines the suggestions of 9158 customers on grinding mills. This grinding mill perfectly satisfies the production demands of the customers on 200-33μm (80-425Mesh) fine powder.

MTM Medium-speed Grinding Mill

MTM Medium-speed Grinding Mill

MTM Medium-speed Grinding Mill is a world leading tool for powder grinding. MTM grinding mill absorbs world first-class industrial powder milling technology and organizes the technical experts and related engineers for elaborate design, test and improvement.

Raymond Mill Working Principle

Raymond Mill Working Principle

After jaw crushers break large bulky materials to smaller ones, elevators work to send materials to the hopper. Then, by electromagnetic vibrating feeders, broken materials are evenly and quantitatively sent to the grinding chamber of MTM Medium-speed Grinding Mill. After grinding, materials are blown away by airflow to the powder concentrator for classifying. Under the action of the impeller of powder selector, materials which fail to meet fineness would be sent back to grinding chamber to get another grinding while qualified powders would be collected by cyclone powder collector and discharged from the bottom as finished products. And, after that, the airflow would go into the fan along with the air return duct at the top of cyclone power collector. This system adopts a closed circuit and runs under positive and negative pressure.

Because materials have a certain content of moisture, heat generated during grinding may lead air evaporation or swell in the grinding chamber so that the amount of airflow increases sharply. Besides, if the feed port and joints of pipelines are not sealed well, external air may intrude the grinding mill and lead imbalance of airflow. So, SBM arranges exhaust valves at the air outlet of the fan to induce redundant air into the bag filter. After purifying, the redundant air is discharged. This arrangement can achieve both the balance of airflow and the eco-friendly production.

Performance Advantages of Raymond Mill

The main transmission device adopts sealed gear box and pulley, so the transmission is stable and reliable.

Imported high-quality steel is used for important parts. High-performance wear-resistant materials are used for the grinding parts.

A Raymond Mill covers a small area, and can complete powder preparation efficiently and the fineness of the finished product is uniform and the screening rate can be as high as 99%;

The introduction of foreign centralized control technology in the electrical system can realize the unmanned operation of the workshop and make the maintenance simple and convenient.

How to Increase the Yielding of Raymond Mill?

The jaw crusher is a large crusher installed and receives no-load testing in the manufacturer's workshop. However it is disassembled into components for transport.

 

Do a good job about daily maintenance of the Raymond Mill.

 

Correct operation of the Raymond Mill is a must. Improper operation may cause damage to the Raymond Mill and shorten its service life, which may cause considerable economic losses due to long-term shutdown.

 

Control the feed standard of the Raymond Mill.

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