what is the application of raymond mill

When we choosing Raymond mill or try to know and study itunders, except to consider its capacity and quality, it is necessary to understand its scope of application(range of application), and necessary to understand if it really suitable to use for your raw materials. Here is to introduce Raymond mill /grinding mill application scope, and usage range.

For Raymond mill's investment, we often expect a small investment and big return, so understanding the capacity and quality of the equipment is only one part of it, and we need to understand the scope of its application. Because of the wide range of applications can complete the processing need of more materials by use one same Raymond mill, and obtain more benefits. More and more customers understand this situation, so more and more people pay attention to it. The application scope of the Raymond mill is here to introduce.

 How to choose a right/ appropriate Grinding Mill/Raymond mill, and what is the application of Raymond/Grinding Mill?

For Raymond mill, its application is mainly in small and medium-sized mines, chemicals, building materials, metallurgy, refractory materials, pharmaceuticals, cement, etc., which provides great help for the processing of different materials in these industries. There are many kinds of materials that can be processed, including: gypsum, talc, calcite, limestone, marble, barite, dolomite, granite, kaolin, bauxite, iron oxide red, iron ore, etc., but these cannot be summarized. The scope of application of Raymond mill can be found that the materials that can be processed by the machine need to meet the following requirements: various non-flammable and explosive ore with Mohs hardness below 7 and humidity below 6%.

From the above introduction to the scope of application of Raymond mill equipment, it can be seen that as long as the hardness is less than 7 and the humidity is below 6%, and the material that meets the non-flammable and explosive requirements is satisfied, the machine can be processed from this. In terms of aspect, the scope of application of the aircraft is still relatively large, which is one of the reasons for its better application in the market.

The above is a detailed introduction to the problem of the application scope of Raymond mill. From the analysis, it can be seen that the scope of application of the machine is relatively large. This feature is an important condition for obtaining better market development, but it is not the only one. The conditions also include many other aspects, such as good operational stability and low cost. Of course, the excellent performance of the machine needs to be based on good operation and maintenance, so the operation and maintenance of Raymond mill It is also a problem we need to pay attention to.

The origin, working principle, application range, functional characteristics and future development trend of Raymond mill

Raymond mill, also known as the suspension roller Grinding mill, English full name,we call it: Raymond mill, is a kind of powder machine imported from abroad.

1. Who invented Raymond mill?

In 1906, CVGrueber founded the Curt Von Grueber machinery factory in the southern suburbs of Berlin. Using his patents in the United States, he produced the first Maxecon mill and used it as a coal-fired equipment for the MOABIT power station in BEWAG in Berlin. The grinding capacity can reach 5T/ H, sold nearly 600 units in a few years, respectively, used in the field of grinding in different industries. After E.C. Loesche became a shareholder and headed the Curt Von Grueber machinery factory, he decided to purchase the US patented raymond centrifugal ring roll mill to produce the first Raymond mill system.

However, since the grinding power (centrifugal force) of the Raymond grinding wheel was limited by the diameter and speed of the grinding roller, the grinding mill/Raymond mill was only applicable to soft, low ash and easy-grinding coal materials at that time. The German coal is harder, the ash is higher, and the higher the grinding power is required. The Raymond coal mill of this structure is difficult to meet the grinding requirements, so the Raymond coal mill is not popular in Germany. At that time, Raymond coal mill was suitable for the grinding requirements of American coal, so Raymond coal mill was widely promoted and applied in the United States.

2. Who improved Raymond mill?

In 1925, ECLoesche summarized the use characteristics and structural drawbacks of the first generation Raymond coal mill, decided to further improve the grinding structure of the Raymond mill, and developed a grinding machine with the opposite principle of grinding, called improved type. Raymond mill. The ventilation of this improved Raymond mill system has two modes: positive pressure and negative pressure. This type of Raymond mill patent was soon purchased by Combustion Engineering. Since the modified Raymond mill still has the problem of ring roll grinding, although the roll diameter is slightly increased, the grinding strength is not increased much.

Later, the Raymond branch of the American Combustion Engineering Company developed a new generation of Raymond mills based on this, called VR grinding. This Raymond mill is similar in many respects to the structure of the current Loesche mill. It is worth noting that it differs from the Loesche mill conical roller and the plat grinding disc, but uses a cylindrical grinding roller and a grinding disc with a 15 degree angled inclined grinding surface. The grinding rolls have a roll-out device similar to the Loesche mill during inspection and repair, and are also equipped with protective devices to prevent metal contact between the grinding rolls and the grinding disc. In addition, the grinding roller can be lifted in advance before the mill is started, which can reduce the starting torque of the motor. Raymond mill is commonly used in industrial applications in the United States to prepare pulverized coal. The fineness of the product varies between 250 and 325 mesh, and the product fineness and yield can be adjusted during operation.

Since May 31, 1995, Raymond mill as the first product ,who applied its patent under its own product name. It has been nearly fifteen years old. With years of development and improvement, the types and models of Raymond mill are becoming more and more, due to the stable performance, strong adaptability and high cost performance of Raymond mill, China's introduction has been well received by users for many years, occupying a very important position in the crushing equipment.

3, Working Principle of Raymond mill

The working principle of Raymond mill is to add the material from the feeding hopper on the side of the hood to the machine, and to revolve around the vertical axis by the grinding roller device suspended on the main plum frame of the main machine, while rotating itself, due to the rotation By the action of the centrifugal force, the grinding roller swings outward and presses against the grinding ring, so that the blade shovel the material to the grinding roller and the grinding ring, and the purpose of pulverizing the material is achieved by the rolling rolling of the grinding roller.

At present, there are many domestic manufacturers of Raymond mills, such as Henan Winnermac Heavy Industrial Machinery Co., Ltd. There are also many models, such as the suspension roller type Raymond mill, the vertical Raymond mill, the R type Raymond mill, etc. The advantages of Raymond mill are outstanding, the applicability is strong, and the market share has been high.

4, Raymond mill application range

Raymond mill is widely used in quartz, talc, marble, limestone, dolomite, lime, activated clay, activated carbon, bentonite, kaolin, cement, phosphate rock, gypsum, graphite, glass, manganese ore, titanium ore, copper ore, chrome ore. , refractory materials, thermal insulation materials, clay, titanium dioxide, iron oxide and other Mohs hardness of 9.3 or less, humidity of less than 6% of non-flammable and explosive minerals, construction, chemical, fertilizer and other industries more than 300 kinds of materials High-fine powder processing, the finished product size is in the range of 60-325 mesh (0.125 mm - 0.044 mm), and the minimum fineness of a small part of the material can reach 1000 mesh (0.013 mm) as needed.

5, Raymond mill features

Although different types of Raymond mills have their own advantages, Its performance and characteristics are not the same as well, but generally Raymond millhas the following characteristics:

(1)The entire Raymond mill is a vertical structure with a relatively small footprint, strong system and strong set of integrity. It can be self-contained independently Production system from roughly pocessing or conveying of raw materials, milling and final packaging.

(2) Compared with other Grinding milling equipment, Raymond mill has a high screening rate. The sieve size of the finished product by Raymond mill can reach more than 99%, which is not achieved by other milling equipment.

(3) The electromagnetic vibration feeder is uniform in feeding, easy to adjust, small in size, light in weight, energy-saving and power-saving, and easy to maintain.

The electric control adopts centralized control and advanced selection, and can realize unmanned operation in the host computer room.

(4) The main drive unit adopts a closed reducer, which has stable transmission, reliable operation and no leakage of oil.

(5) The main blade holder is always in contact with the material during operation, so the blade holder is composed of upper and lower parts. After the lower seat is worn, the disassembly connection bolt can be changed.

(6) The important parts of Raymond mill are made of high-quality castings and profiles. The craftsmanship is fine and the rigorous process ensures the durability of the whole set of equipment.

6. Problems with Raymond mill

In recent years, non-metallic minerals has gained an extensive development in the field of ultra-fine powder applications , downstream enterprises have higher and higher requirements for non-metallic mineral products, especially for product fineness. Some problems with traditional Raymond mills have plagued mineral processing companies and equipment manufacturers. These problems are mainly manifested in:

(1) The product has low fineness. The fineness of ordinary Raymond mill is generally below 500 mesh. These devices can only occupy the lower-end powder application market, and are not suitable for the future development of China's powder industry.

(2) The mechanical failure rate is high, the power consumption is large, the noise is large, and the emission pollution is large.

The system efficiency is low, the separation effect of the product collection system is not ideal, and a large amount of fine powder cannot be effectively collected and repeated to be grinding in the system to waste power.

(3) There are mistakes in the design of the main air box duct. The larger particles in the material of the grinding area and the particles in the future are often thrown into the bellows and gathered in the tail of the volute, and continue to extend forward, so that the amount of over-wind is gradually reduced. It is easy to cause traffic jams, no powder or less powder, affecting production.

In order to solve these problems and adapt to the needs of the market, many Raymond mill manufacturers have improved and improved the traditional Raymond mills. Although through the efforts of Chinese manufacturers and R&D personnel, these problems have been improved. Mengmo began to occupy the market. However, due to the different qualifications of various enterprises, new technologies cannot be applied in some enterprises with limited scale and weak R&D capabilities. Therefore, some problems still exist in the Raymond mill market in China to a certain extent. In fact, since the introduction of the first Raymond mill in China, related companies have been working on the improvement of Raymond mill. The technical improvement work of Raymond mill in China tends to be more efficient and practical. The inevitable need of China's market is also the inevitable development of the Raymond mill industry.

7, the development trend of Raymond mill

The mill industry in developed countries in North America and Europe has been developing rapidly and is far ahead in the entire industry market. Its development speed is higher than the average development speed of the mill industry, and its mill industry is also relatively complete. Milling equipment manufactured in developed countries is becoming more sophisticated and is evolving towards an increasingly high level of automation control.

Judging from the development of the domestic mill industry, China's mill equipment industry has developed very rapidly in recent years. At present, China's mill manufacturing has been quite sophisticated, and the mill industry is showing a prosperous trend. Moreover, the mill equipment industry The development is bound to promote the development of all aspects of China's milling business in the future.

Specifically, China's domestic grinding milling equipment is not only simple in production structure, easy to operate, easy to maintain, but also pays more attention to the diversification of equipment performance. The cost performance of milling equipment has also been greatly improved. In addition to continuous improvement of equipment models, the control level of the mill is also greatly improved. At the beginning of the 21st century, China's mills are still in a relatively backward state, and all aspects are relatively backward. In just a few years, China's mill equipment market is close to and has already begun to catch up with the milled powder produced by developed countries. The trend of equipment.

In the development process of China's domestic mineral processing equipment manufacturing industry, it has undergone two changes. First, product development has changed from imitation to independent innovation; second, economic operation has changed from extensive to profitable. It is expected that the future development trend of the grinding equipment industry will be toward large-scale, digital intelligence and green energy-saving.

With the continuous development of the powder industry, the market demand for Raymond mill is also increasing. Raymond mill is the main equipment for grinding in China's powder industry. In order to meet the requirements of different application fields, it is an inevitable trend to develop "high reliability, energy saving, precision and automation".

(1) More energy saving and environmental protection

In recent years, all walks of life have paid more and more attention to green environmental protection issues. With the proposal of “Green Twelfth Five-Year Plan”, energy conservation and environmental protection have become the vane of development of various industries, especially in Raymond mill.

With the increasingly strict requirements of green environmental protection, the state encourages the development and processing of mining industry, and at the same time has high standards for mining machinery. R&D and manufacturing of Raymond mill should pay more attention to research on high efficiency and energy saving, aiming at zero pollution and high Improved manufacturing, such as efficiency, low energy consumption and mechanical life. In the current Raymond mill market, energy-saving and environmentally-friendly equipment with high processing capacity, high sorting efficiency and low energy consumption will be more popular, and the market demand is more urgent.

(2) The automatic control system is more perfect

Raymond mill will be developed in the powder industry mainly for high reliability, precision, automatic condition monitoring and automatic control.

It can adopt measures such as thyristor power supply, AC frequency conversion speed regulation, grease centralized lubrication, shock absorption, etc., and has equipment for condition monitoring and automatic control of microcomputer. Among them, the high reliability needs to be studied through the rationalization of the mechanical principle to enhance the wear resistance of the grinding ring, the lower gland, and the like, and improve the lubrication of the machine before the bearing in the continuous working state.

Experts believe that automatic condition monitoring and automation control need to add a high-intelligent electronic control system inside the Raymond mill to automatically control the ingress and egress, grinding, and quantification of materials. Automatic control can effectively improve the efficiency, work accuracy and safety of Raymond mill. The operator only needs to control the buttons between operations.

(3) Grinding accuracy will be greatly improved

With the continuous improvement of the fineness requirements of powder products in the application field, the milling equipment industry is bound to develop in the direction of refinement and scale, and Raymond mill is no exception.

For a long time, Raymond mill products have rarely made breakthrough improvements. Although the grading system has been greatly improved, most of them have stayed in the single machine transformation. As a formal product of the production equipment manufacturers, there are not many, in many parameters, for example. The size of the grinding roller ring, the power of the main engine and the spindle speed have rarely surpassed. In fact, the traditional Raymond mill has many potentials to be tapped.

Increasing the accuracy of material grinding requires an increase in the accuracy of the analyzer. This problem has always been a technical difficulty in the improvement of Raymond mill, but it is also one of the main bottlenecks in the development of Raymond mill. Therefore, the grinding precision of Raymond millwill be the focus of research and development of related companies and R&D personnel in the future, which will also be the key to determine the future development of Raymond mill in the mill industry.

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