Raymond Mill

Raymond Mill

Raymond mill is also called Raymond grinding mill, Raymond grinder, Raymond pulverizer, after many years of practice and continuous improvement, its structure has been perfect and is a kind of high efficient fine milling equipment, using closed-circuit circulation. Raymond mill is widely used in metallurgy, building materials, mineral products, chemical materials, mining and other field, suitable for processing a Mohs hardness of seven below the level of humidity below 6%, in a variety of non flammable and explosive ore.

    Raymond Mill
  • 【Feed size】:20-30mm
  • 【Capacity】:1.2-11T/h
  • 【Application】Small and medium-sized mines, chemical industry, building materials, metallurgy, refractory materials, pharmaceutical, cement and other industries.
  • 【Material】Processing Mohs hardness below level seven, humidity below 6% in various non flammable and explosive minerals, such as gypsum, talc, calcite, limestone, marble, dolomite, barite, granite, kaolin, bauxite, iron oxide red, iron ore etc..

Raymond Mill Structure

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

Raymond mill Structure

The whole working process of Raymond grinding mill (the process of grinding material): the bulk materials by jaw crusher to the desired size, by the elevator will be the materials to the storage hopper, then after vibrating feeder evenly and quantitatively and continuously into the indoor host grinding grinding, grinding after the son of powder was fan airflow away. Through the analysis of machine grading, consistent with the powder fineness with air flow through the pipeline into the large 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.

In the grinding chamber internal was grinding material has certain water content, grinding heat is generated resulting in grinding indoor gas evaporation changes the gas flow rate, as well as the whole all the pipe connection is not tight so that the external gas is inhaled, the circulating air flow volume increased, as is this by adjusting the fan and the host computer are the legacy of pipe to achieve the flow balance, and gas is introduced into the small cyclone collector excess, the residual gas into fine powder collecting down, then the cyclone collector upper exhaust pipe into the atmosphere, or into the dust collector in the exhaust gas purification.

Raymond mill working principle

Raymond grinder host working process is through the driving device drives the central shaft to rotate, the upper end is connected with the axis of the plum frame, frame is provided with a grinding roller device and the formation of the swing fulcrum, the only country around the center of rotation, and the grinding roller grinding ring revolves around at the same time, the grinding roller itself due to friction with rotation. Plum frame the lower end is provided with a blade system, its location is in the lower end of the grinding roller and the roll grinding, blade with transfer process in the material shoveling throwing feed between the grinding roller ring, forming a pad layer, the centrifugal force generated by the rotation of the material layer grinding roll outward will crush the materials, namely from this to achieve milling.

Raymond Mill Working Principle

Through analysis of machine speed regulating motor and the two stage reducer to drive the turntable rotation of the 60 blades, forming a graded effect on powder son. The rotating speed of the blade speed is according to the finished powder sizes size adjusted. When to obtain a finer grained powder when, must improve the blade speed, the blade and the powder contact increased, so that the undesirable powder is thrown to the wall and the flow from the blade, coarse powder because of the self gravity role into grinding chamber for heavy grinding, finished powder qualified by blade with the suction air flow large cyclone collector, air and powder after being separated, the son of powder is collected.

The performance of a large cyclone collector of Raymond mill for grinding machine plays a very important role, when the belt powder airflow into the collector is the state of high-speed rotation, to the airflow and the powder after separation with conical wall contraction, air moves towards the center of the conical bottom (from air to when the natural length) to form a rotating upward air cylinder, then powder is separated fall collection. Due to the negative pressure state to rotate on the core, so the sealing of high demands on the collector must be strictly separated from the lower end, the outside air, otherwise are collected under the powder will be the core flow away, which directly affects the whole production, therefore collector are arranged at the lower end of the powder locking device, its role is to the outside world and positive pressure gas collector negative pressure gas separated, this is a very important part, if not installed the tongue plate powder locking device or the powder locking device anastomosis Mifengbuyan will cause no powder or less powder, seriously affect the whole machine production.

Another: the winnowing process Raymond grinding mill: materials after grinding, the fan will be blown into the host shell, blowing powder, placed at the top of the grinding chamber by the parser for separation, fine through thick materials and into the grinding chamber grinding fineness, the wind out the specifications of the flow into the cyclone collector, the collection after the powder tube discharge, i.e. the finished product. Air flow from the air return pipe on the upper end of the large cyclone collector back into the fan, the wind road is a circle, and the flow in the state of negative pressure, exhaust pipe circulating wind path of air through the fan on the whole and partial host intermediate discharged into the small cyclone collector. Purification.

Advantages and benefits

  • 1.Finished powder fineness uniform, through screening rate of 99%, which is difficult to have other milling equipment.
  • 2.Machine adopts airtight gearing and pulley gear box, transmission smooth, reliable operation.
  • raymond mill advantages and benefits
  • 3.The whole three-dimensional structure, small footprint, systematic, from raw materials to delivery to rough milling and final packaging, can be self-contained independent production system.
  • 4.Electromagnetic vibrating feeder uniform feeding, easy to adjust, small size, light weight, fuel saving, easy maintenance.
  • 5.Electrical system with centralized control, nobody can achieve the basic milling plant operation and easy maintenance.
  • 6.The host shovel knife in operation is always in contact with the material, so the blade frame is made up of two parts, the lower seat wear after removing can exchange connection bolt.

how to use the Raymond mill?

  • 1.While working, the operating personnel must have a certain skill level and knowledge, we can carry out the operation.
  • 2.The machine must be running in good lubrication condition, otherwise it will damage the bearing, shorten the service life. The specific time and gas filling grease lubrication system table varieties.
  • 3.Prohibited the piece of metal into the machine, find out immediately stop, otherwise it will damage the grinding roller and grinding ring.
  • Raymond Mill Use
  • 4.Feeding should be uniform, too much will duct blockage, lower yield, easy to burn out the motor; too little will also reduce yield.
  • 5.Volume adjustment: located in the fan inlet pipe on the air volume control valve, generally to the maximum position, according to fineness and yield requirements appropriate adjustment.
  • 6.Fineness regulation: according to the size of the material, different hardness, moisture content, specific gravity, processing thickness is different, can be adjusted at the top of the analyzer, high speed, high fineness, low speed, low fineness. Improve the fineness, the yield will be reduced accordingly, if not up to the requirements should be debugging fan air volume and speed, the user can flexibly mastering.
  • 7.When stop, first stop feeding and host continues to run, so that the residual material to grinding, about a minute later, can close the host motor and analyzer motor, stop grinding work, then stop the fan motor to purge residual powder.

How to choose a suitable Raymond mill?

We are all familiar with the Raymond mill, it is the main grinding equipment in industrial production. With the development of industry in recent years, Raymond grinding mill development has also been made good grades. Raymond pulverizer and other mechanical equipment, accessories of Raymond mills reasonable maintenance requirements in use, in order to ensure the normal operation of equipment.

factors should be considered in the selection of Raymond Mill:

  • One, material.

    Hardness of material may affect the output of similar machines, the stiffer the yield is low, so we should choose the higher yield of machine to maintain the need of production. If the equipment can not meet the need of production is likely to lead to the damage of Raymond grinder accessories, influence the production efficiency of equipment.

  • Two, the material humidity.

    Normal humidity range should be 6% or so, too high or too low will affect the corresponding production, therefore, to ensure the material humidity, ensure the service life of parts of Raymond grinder mill.

  • Three, the daily output.

    According to the daily production needs to choose the adaptation of the models, choose suitable models according to the needs of enterprise production. This can avoid the equipment damage caused by excessive work parts of Raymond milling machine.

  • Four, the price.

    Good quality equipment accessories price Raymond mill nature also will be high, so when the choice, must not choose the best, as long as it is the most appropriate can. The above factors should be considered when selecting the Raymond pulverizer. Through the above analysis we can see, the right choice can very good assurance parts of Raymond grinding mill service life, improve the production equipment.