Moh's hardness below Grade 7
Moisture below 8%
Non-combustible and non-explosive
Feed size ranging from 40 to 400meshes
From 1906 to today, Raymond mill development than a century, was originally used as a raymond coal mills, 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 grinding mill in milling industry is essential.
We will be exploring in more detail the PDF:
- The The History Of Raymond Mill
- Raymond Mill Features And Advantages
- Raymond Mill Parts
- How Does Raymond Mill Work
- How to operate and stop Raymond mill
- 5 Tips To Better Maintain Your Raymond Mill
- How To Improve Raymond Mill Capacity
- Raymond Mill Operating Cost
- Raymond Mill VS Vertical Mill
- Raymond Mill VS Ball Mill
- Raymond Mill Price
- Raymond Mill Parameters
The The History Of Raymond Mill
In 1906 C.V.Grueber created Curt Von Grueber machinery manufacturing factory in the south of Berlin City. He produced the first Maxecon grinding mill with using him granted patents in America. Afterwards, the Maxecon mill was used as a coal grinding equipment for BEWAG MOABIT power plant in Berlin. Its grinding energy was up to 5T/H. Within a few years, the Maxecon mill sold nearly 600 units, and they were applied to the different grinding industries.
In 1925, E.C.Loesche summarized the characteristic and structure disadvantages of the first generation Raymond coal mill, and decided to improve grinding structure of Raymond mill. Afterwards, he created a mill whose working principle is opposite to the Raymond mill, called the improved Raymond mill. The ventilation of improved Raymond Mill System had positive and negative pressure blowing straight in two ways. This type of Raymond grinding patent was soon purchased by USA Combustion Engineering Company (Combustion Engineering).
Later, the Raymond branch of American Combustion Engineering developed a new generation of Raymond mill, known as the VR mill. The structure of Raymond Mill was similar with Loesche mill in many aspects. Notably, Raymond Mill in USA industrial applications, was usually used in the preparation of pulverized coal. The fineness of product changed between 250 ~ 325mesh, which can be adjusted the work product fineness and yield during operation.
Since May 31, l995, the first time to named after Raymond mill for the patent, it has been nearly fifteen years of history. With many years development and improvement, types and models of Raymond mill is also more and more, such as, MTM trapezium mill and MTW trapezium mill are upgraded products of Raymond Mill, They occupy very important position in the crushing equipment.
Raymond Mill Features And Advantages
The grinding roller grinding ring made of wear-resistant alloy material has a service life of 1.7-2.5 times that of traditional wear parts, which can more effectively save the cost of wear parts.
Impulse dust removal equipment is configured for loading, grinding, finished product transportation and storage, to ensure that the production site is clean and environmentally friendly, and there is no dust pollution.
After signing the order, formulate detailed plans for production, preparation and delivery, basic production, and engineer dispatch, installation and commissioning, to ensure that the entire link is carried out in an orderly and efficient manner, and the final delivery is guaranteed.
Raymond Mill Parts
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. 
1.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. 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 heavy industry production of Raymond Mill in general there are two main kinds of material:
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 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.
How Does Raymond Mill Work
After the material is crushed (e.g., crushed, crushed, etc.) to the required particle size, the material is sent to the storage hopper by the elevator, and then sent to the main mill room of the Raymond mill by the vibration feeder. With the centrifugal force, the grinding roller swings outward and is pressed tightly against the grinding ring. The shovel scrapes the material and sends it between the grinding roller and the grinding ring. The grinding roller achieves the crushing purpose.
The fine powder after the material grinding is taken into the analysis machine with the circulating air of the blower to be sorted. The material with excessive fineness is returned to the regrind. The qualified fine powder enters the finished cyclone powder collector with the air flow and is discharged through the powder outlet pipe. That is the finished product.
How to operate and stop Raymond mill
Before starting the Raymond mill, you should first check whether the access door of the machine is closed tightly, if there are iron blocks, debris, etc. inside the machine. Then adjust the fan of the Raymond mill and the steering of the host to ensure that the machine of the Raymond mill will not reverse.
The exhaust valve of Raymond Mill must always be in the fully open position, and the Raymond Mill roller device must also be in a safe state, which is essential for the normal operation of the machine. In addition, it is necessary to check whether the screws and nuts of various parts of the machine are loose. After these inspections are completed, the machine must be turned on for material processing.
Due to the centrifugal movement of the Raymond grinding roller device during the rotation process, the Raymond grinding roller device will swing outward, which will make the tower bite the grinding ring tightly, and make the blade uninterrupted after scooping up the material. It is sent between Raymond grinding roller device and magic, in addition, the rolling movement of Raymond grinding roller device will also achieve the purpose of uninterrupted material delivery to the material destination.
5 Tips To Better Maintain Your Raymond Mill
- 1. During the operation of the Raymond mill, special technical personnel should be responsible for the operation and supervision.
- 2. In order to make the Raymond grinding mill operate normally, necessary maintenance tools, grease and corresponding accessories should be prepared and checked regularly.
- 3. After the Raymond mill has been used for a period of time, it should be overhauled, and at the same time, the wearing parts such as the grinding roller, grinding ring, blade, etc. should be repaired and replaced. The connecting bolts and nuts of the grinding roller device should be carefully checked before and after use to see if If there is looseness, check whether the lubricating oil has been added enough.
- 4. When the grinding roller device is used for more than 500 hours or so to replace the grinding roller, the rolling bearings in the roller sleeve must be cleaned, and the damaged parts should be replaced in time.
- 5. The roller bearing is refueled once per shift, the central bearing of the main engine is added once every 4 shifts, and the blower bearing is added once a month. The maximum temperature rise of the bearing should not exceed 70 ℃. When the bearing is found to be overheated, the accessories such as the bearing and bearing chamber should be removed and cleaned once.
How To Improve Raymond Mill Capacity
1. Reasonably Choose The Main Engine Speed And Improve The Main Engine Grinding Force
Considering the carrying capacity of the main engine motor, it is a factor to improve the production efficiency of the pendulum mill. Increase the running energy of the mill, adjust the belt or replace it with a new one.
2. Reasonably Adjust The Air Pressure And Air Volume Of The Blower
There are huge differences in the physical properties and chemical composition of various non-metallic mineral raw materials, such as graphite, gypsum and other low-density minerals. When adjusting wind pressure and air volume, relatively dense minerals (such as barite, iron) The ore, etc.) should be small and adjusted appropriately.
3. Reasonable Design Of Shovel Device And Selection Of Wear-resistant Materials For Grinding Roller And Grinding Ring
Shovel blades, grinding rollers, grinding rings and other main abrasive wearing parts are severely worn, which will affect the powder extraction rate. Wear parts with high wear resistance materials, such as high chromium cast iron, should be selected. The shovel cannot shovel the material, and the grinding ring of the grinding roller is seriously worn and cannot provide a good grinding effect, resulting in a low powder processing rate. The wearing parts should be replaced in time after they are worn.
4. Good Equipment Lubrication Work
Another reason that affects the speed of the main machine of the mill may be due to the dullness of the grinding teeth. Therefore, it is necessary to check the transmission parts such as the grinding teeth from time to time to prepare for new lubrication.
5. Dredge The Pipeline And Seal It Well
The conveying duct of the mill is blocked, which will cause the powder to be unable to be transported normally, which will cause the problem of low powder output or even no powder. It is necessary to stop the machine to dredge the material in the pipeline during processing, and restart the feeding.
6. Pay Attention To The Humidity, Viscosity, Hardness, Etc. Of The Material
The performance of the equipment itself is the main factor that determines the production efficiency, but the properties of the material, such as powder humidity, viscosity, hardness, and particle size requirements, will also affect the powder extraction rate. Refer to the specifications and operating instructions of the equipment, and run under the corresponding requirements to achieve the best production effect.
Raymond Mill Operating Cost
For Raymond mill, operating costs typically fall into three broad categories:
Fixed costs, such as the price of raymond mill,Whether you are renting or buying, you have to bear the cost. At present, there are many different models of Raymond mill, and the pricing of different models is also different. You can contact us for a free quote.
Variable costs, such as prices for raw materials and labor costs.These may increase depending on whether more production is done, and how it is done.
Raymond mill is suitable for various kinds of materials, such as barite, calcite, marble, limestone, dolomite, activated carbon, bentonite, kaolin, cement, gypsum, etc. The price of the material directly affects the cost. If you have a cooperative raw ore supplier, you can get a more favorable price.
Semi-variable, such as replacement of wear parts.These costs represent a mixture of variable and fixed components. Raymond mill wear parts including: Grinding ring, grinding roller, shovel, liner, shovel plate, shovel seat, gear shaft, auger gear, quincunx bracket, etc.
In addition to these aspects, the operating cost of the Raymond mill also includes some other aspects, such as: preliminary qualification review and downstream powder sales pricing, etc.
Raymond Mill VS Vertical Mill
It is well known that Raymond mill andvertical millare core equipment in cement production line. Choosing the right one depends on the many factors such as: materials, input size, capacity, etc. Compare the two mills from the following aspects:
First, Different Structure
During operation, the position of the grinding roller of the vertical mill is fixed after adjustment. The grinding roller itself rotates like a pinion without direct contact with the grinding disc. The bottom grinding disc keeps rotating to remove the material in the gap between the grinding roller and the grinding disc. Carry out rolling milling.
The spring plum frame of Raymond Mill is equipped with 5 or 6 evenly distributed grinding rollers. The grinding rollers move in a circle around the shaft. The material raised by the bottom blade is sent between the grinding roller and the side wall grinding ring for grinding.
Second, Different Grinding Fineness Ranges
The particle size range of Raymond mill is between 325 mesh and 10 mesh.
On the basis of the Raymond mill, the vertical mill has been technically improved, and it is between 2500 mesh and 80 mesh.
Raymond Mill VS Ball Mill
Working Principle
The ball mill is a horizontal cylindrical rotating device. The material enters the first bin of the mill uniformly from the feeding device through the hollow shaft of the feeding. The bin has stepped or corrugated liners, and is equipped with steel balls of different specifications. The centrifugal force generated by the rotation of the cylinder will bring the steel ball to a certain height and fall down, causing heavy blows and grinding to the material. After the material reaches the rough grinding in the first warehouse, it enters the second warehouse through the single-layer partition board, and the material is further ground in the warehouse, and the powder is discharged through the discharge grate plate to complete the grinding.
The Raymond mill is added into the machine from the hopper on the side of the machine casing. The grinding roller device suspended on the main machine revolves around the vertical axis and rotates itself. Due to the centrifugal force during rotation, the grinding roller It swings outside and tightly presses the grinding ring, so that the blade scrapes the material and sends it between the grinding roller and the grinding ring. The material is crushed due to the rolling and rolling of the grinding roller.
Structural Aspects
The ball mill is composed of the main parts such as the feeding part, the discharging part, the turning part, and the transmission part. The hollow shaft is made of cast steel, and the inner lining can be replaced. The rotary gear is processed by hobbing of the casting. The cylinder is equipped with a wear-resistant liner, which has good wear resistance.
Raymond mill is mainly composed of main machine, analyzer, fan, finished cyclone separator, fine powder cyclone separator and air duct. Among them, the host is composed of grinding roller, grinding ring, frame, air inlet volute, blade and cover.
Application
Ball mill is the main equipment for crushing materials. It is widely used in cement, new construction materials, refractory materials, fertilizer silicate products, ferrous and non-ferrous metal beneficiation, glass ceramics and other production industries. It can dry or wet grind a variety of ores and other grindable materials.
Raymond mill is widely used in marble, limestone, dolomite, fluorite, lime, barite, calcite, potassium feldspar, talc, activated white clay, activated carbon, cement, phosphate rock, gypsum, glass, insulation materials, etc. Mohs hardness is not more than 9.3, humidity is below 6%, non-flammable and explosive minerals, chemical industry, construction and other industries of more than 280 materials of high-fine milling processing, the final particle size range of 80-325 mesh arbitrary adjustment, part The material height can reach 2000 mesh.
Raymond Mill Price
In general, the price of a Raymond mill will be affected by several factors. One important factor is the size and capacity of the mill. Larger mills with a higher capacity will typically be more expensive than smaller mills with a lower capacity. The type of material being ground can also affect the price of a Raymond mill. For example, mills that are designed to grind harder materials will typically be more expensive than those designed to grind softer materials.
In addition to size and capacity, the specific features and capabilities of a Raymond mill can also affect its price. For example, mills with advanced control systems and multiple grinding settings may be more expensive than those with simpler designs and fewer features. Other factors that can impact the price of a Raymond mill include the location of the mill and any additional services or accessories that are included with the purchase.
Overall, the price of a Raymond mill can vary depending on a number of factors. When considering the purchase of a Raymond mill, it is important to carefully evaluate these factors and consult with a supplier or manufacturer to determine the most cost-effective option for your specific needs.