Veiel mill (MPS type vertical roller mill grinding) can be coal, cement clinker and cement raw material. West Pufeifo company, a C Corporation in the United States and China Shenyang Heavy Machinery Factory all the production of the product, the Shenyang Heavy Machinery Factory production of MPS series vertical roller mill technical performance table table 3-2. Figure 3 a 3 MPS vertical roller mill structure. Its working principle is: three pneumatic hydraulic mill roll (a drum) pressure in the annular groove of the disc motor through a transmission system drives the grinding disc to a certain speed rotation (20 to 30 RPM). Because of the friction between the roller and the roller, the roller rotates around its own axis. By connecting the three tie rods at the corner of the triangle pressure bracket on the machine base, the roller is applied to the roller. By the feeding chute into the material (particle size of 80 ~ 100 mm), grinding to 80% through 200 mesh sieve of fine powder, the millstone around the annular air inlet communicated with the hot air blowing, the upper part of the powder selecting device selected and coarse grain fall disc re grinding, fine powder the exit row dust collection device to collect for the finished product. Mill wind speed up to 60 ~ 80 meters / sec, and drying efficiency is very high. Recently, MPs type vertical roller mill was not only used for grinding cement raw material, pat successfully cement clinker grinding. According to West Germany, a cement plant with a new improved MPS3750C vertical roller mill grinding cement clinker, production of PZ35 (DIN standard) cement, output reached 40 tons / PZ45 cement production, output up to 78 tons / hour. Power consumption of grinding 25 percent less than the ball milling and grinding fineness is easy to control, the grinding of cement has high early strength. According to Reid grams (a - E - RedeKer). MPs type vertical roller mill in the cement raw meal grinding time, and set the metal wear rate was 5.7 g / ton, grinding disc lining board wear rate of 1.2 grams / ton, the system maintenance cost is only 0. Fourteen 2 dollars / ton. MPs vertical roller mill grinding cement raw material output has reached 500 tons /, grinding standard cement production has reached 150 tons /. It is expected that this vertical mill has a trend to develop in the direction of large scale. Figure 4 - 3 is a schematic diagram of the MPS vertical roller mill grinding device. The MPS mill under the same grinding. The grinding disc diameter is flat grinding, which makes the millstone around more stomata and under a certain wind speed have a larger volume of air, the mill pressure drop is lower, so you can save the power of the fan. On the other hand, there is a good heat transfer between the material and the hot air because of the large amount of ventilation, the material and the hot air. Due to MPS vertical mill grinding roller of a drum shaped, the grinding disc is provided with annular groove, so in our country, also known as drum and a slotted disc type hydraulic vertical roller mill.

It is understood, Shanghai Shibang Machinery Co., Ltd., to build an annual output of 6 00000 tons of slag powder production line become iron and steel plant, concrete mixing station to deal with waste slag imitated key projects, in the powder production line, slag vertical roller mill application rewrite the ball mill universal history, then why in treatment of waste slag grinding to choose vertical roller mill? A, electricity consumption data show that the vertical roller mill, ball mill will be replaced such trend Show according to relevant data, traditional milling mechanical and electrical consumption, usually 110kWh/t, and vertical roller mill is able to control power consumption below the 80kWh/t; From this point of view, if every year 20% of the ball mill is composed of a vertical grinding mill substitution, achieve 7.6 billion kwh of electricity saving, equivalent to 28 million tons of standard coal saving, CO2 emission reduction of 73 million tons, saving energy and reducing consumption big amazing. Two, vertical roller mill integration of production can reduce the cost of consumption The biggest difference between vertical roller mill and ball mill is that the vertical roller mill is a new and high technology equipment, which is a set of grinding, classification, drying and one. It greatly simplifies the process flow of slag grinding and saves the investment. It is worth mentioning is that like the Xinxiang City, the Great Wall Machinery Co., Ltd. can not only production of vertical roller mill, and to provide customers from the civil to reach the standard of "turnkey" service debugging, can let customers worry, effort, efficiently into powder production. Three, with the facts speak, many enterprises choose slag vertical roller mill for waste treatment From the departments concerned that, at present many cement plants, steel mills, concrete mixing station selection slag vertical mill as the mainstream of slag powder production equipment, such as Jiangxi Jiujiang Shiji with an annual output of 60 million tons of slag powder project, Huanghua Shi Xin concrete with an annual output of 3 million tons of slag powder project, Henan Mengdian group with an annual output of 100 million tons of slag general contracting project and so on, a large number of cases demonstrates the role and significance of the powder in the production line of vertical roller mill, it can be said, vertical roller mill processing slag powder is currently recognized as the most energy saving and environmental protection, new machine. Slag powder as a new type of high performance concrete admixture, has the advantages of improving the concrete compressive, tensile, shear, bending, and so on, at present, with the same amount of slag powder and cement products in the same amount of cement, has become the mainstream of building materials industry trend, slag vertical roller mill market is booming.

Because the vertical roller mill capacity will be affected by the factors of material hardness, moisture content, grain size, with a vertical roller mill will under no material showed unused production capacity. Similarly, the single machine capacity of 150 tons per hour of vertical roller mill opportunity due to the material properties of different sizes of different sizes. Our company is well-known domestic cement grinding, mine grinding integrated system manufacturers, supply production of various specifications of vertical roller mill products, with its series of vertical roller mill products as an example: Situation one: the material for slag, steel slag, nickel slag and other industrial waste That the single capacity at that time is 150 tons an hour of vertical roller mill, the model may be GRMS53.41, diameter of disc for 5.3 meters, power is 4200 kW. Case two: material for cement clinker Because the cement clinker is smaller, the vertical roller mill capacity is also increased. Then can have production production capacity of 150 tons of cement vertical mill is generally used in the GRMK46.41 cement vertical roller mill, grinding diameter is 4.6 meters. Power is 3350KW. Three: material is cement raw material When used for grinding cement raw material, will be more easily to the needs of the fineness of grinding. The 3.2 meter specifications of GRMR raw material vertical roller mill can meet the production needs of producing 150 tons of raw materials. Our company for many years of continuous innovation, with advanced technology, excellent quality of equipment, diversification of services, excellent team to win the trust of customers.

Cement grinding system mainly includes the four parts: raw meal grinding and coal grinding, grinding clinker and slag grinding grinding, has been, cement plants, the production of grinding by ball mill, high energy consumption and high pollution become endemic in many cement plants. With the development of industrial production technology, the new type of environmental protection, energy saving and high efficiency of the vertical roller mill is gradually introduced to promote the domestic cement plant. Xinxiang Great Wall Machinery Company decades working in cement vertical mill, coal vertical mill, slag vertical grinding, raw materials vertical grinding of R & D and production, technology maturity, has the hundreds of cement plants, steel mills, grinding station provides high performance vertical grinding equipment. Comparison of noise and noise of vertical roller mill: Ball mill noise pollution levels in general in more than 100 dB, and vertical roller mill out of the noise level is much lower than that of ball mill, generally within the range of 80 to 85 dB, good control of noise pollution. Dust and dust pollution in vertical roller mill: Ball mill in the production process inevitably produces a lot of dust, standing mill is set crushing, drying, grinding, grading conveying in one of the large grinding ideal equipment, with fully enclosed design, greatly reduce the dust emissions. Cement vertical mill noise and dust pollution is much lower than that of ball mill has obvious now, not only that, vertical roller mill also overcome the flaws in ball mill grinding mechanism, has the advantages of high grinding efficiency, low power consumption (than that of ball mill energy saving 20% to 30%), high drying capacity, allowed into the grinding of large size materials, grinding process is simple, covers an area of small, low construction cost, wear small, long life and other advantages, he will be greatly reduced power consumption costs, operating costs, the latter wear-resistant parts costs, construction costs etc.. If the cement plant in Hubei can be replaced by vertical mill, the result may be a big reversal.

With the country vigorously promote technological innovation and new dry cement design optimization, in order to meet market demand for cement, relying Anhui Conch Group Zongyang two 2500t / d clinker production line of domestic construction projects, in 2001 the successful development of the country has a advanced level of similar products MLS3626 vertical roller mill (hereinafter referred to as MLS3626 vertical roller mill). This is a top research and development results, fill the gaps in our large vertical roller mill, to achieve the country 2500t / d cement production line technology and equipment of a major breakthrough. This paper mill in respect of research and development work of a late presentation outline. (1) Determine the main parameters. According to the movement of materials with speed and strength in the grinding disc, the roller diameter, roller width, disc speed, material bed thickness, wind speed and other factors on disk grinding speed; studied mill grinding capacity and bake dry capability, and according to the material test results on MLS3626 vertical roller mill to determine the type and yield MLS3626 vertical roller mill, power consumption indicators (mill main motor power) and so on; determining an effective weight disc liner according wear indicators to ensure this two life of wearing parts are greater than 10000h. (2) optimization of the grinding mechanism design. Studied the effects of the disc, the curvature of the roller grinding capacity, unit power consumption, in order to determine the optimal grinding curvature. Large parts of the disc holder and pressure frameworks were the main bearing static analysis and calculation of structures under dynamic loads, optimize the framework of cross-sectional dimensions determine the pressure to find the disc holder stress equally conducive to optimum shape of the casting process, and fully consider the impact of thermal stress analysis of the research, the development of modular design and efficient classifier for MLS3626 vertical roller mill. Key consideration separator area portion control and particle motion, limiting the mill appear as irregular exercise, from the surface to reduce the cycle load, improve grinding efficiency. (3) the development of highly efficient combined classifier design. Based on the research and analysis of contemporary art and efficient modular separator (eg LVT separator, O-sepa separator, SEPOL separator, RAR separator, etc.), the development and design for efficient vertical roller mill MLS3626 combined classifier. Key consideration separator area portion control and particle motion, limiting the mill appear as irregular exercise, from the surface to reduce the cycle load, improve grinding efficiency. (4) optimizing mill maintenance equipment and other ancillary equipment design. The main disc, roller liner structure to achieve maintenance and replacement easy, shorten the maintenance cycle, improve equipment operation rate; designed with air lock features three gates, in order to ensure better continuity of feed and can be adapted relatively high material moisture requirements; design manual bypass machine has, beside the machine automatically controls the remote control and operation functions of the three electrical control systems.

1, the lack of feed When they find a lack of storage should stop feeding material, now lose out if continued risk free feed vertical roller mill, should feed vertical roller mill equipment and feed, or make the bed thinning attack rumbling sound, causing damage reducer . 2, the vertical roller mill is too large oscillations (1) feeding uneven, when the vertical roller mill mixes mostly powder, the load factor within the large vertical roller mill, resulting in thin material on the disc, and the disc with the roller directly touching, forming a vibration vertical roller mill; when the vertical roller mill when the mixture more for lump materials, formation pressure grinding roll is not stable, vibration grinding attack. The way to deal with the granularity of the grinding material is stable, appropriate adjustments grinding feed rate or reduce pressure, to ensure the required fineness of the material premise of proper lower separator speed. (2) fitting into the vertical roller mill, view the metal detector, the magnet separator is not working properly. (3) causing damage to the kiln exhaust fans or people shaking vertical roller mill kiln exhaust gas pressure is high, instability and dust concentration Ambassador vertical roller mill high temperature thereby increasing the vertical roller mill load moment should increase throttle opening of the cycle, increasing large recirculation flap into the vertical roller mill, increased vertical roller mill personnel a negative pressure, so that the vertical roller mill work balance.

Disc horizontal, vertical roller mill, powder area is a plane, the center of gravity of the roller system to the disc, only the movement in the vertical direction, all the impact and pressure are easy to handle in the vertical roller mill direction. Three-roll mill roll suspension systems integration and other forms of mass compared with the small, low inertia. The required power is small, the advantage of smooth motion, the inner end of the shaft 3 is rigidly connected to the roll, but the outer end of the shaft is connected to the hydraulic cylinders, respectively, a movement of the roller relative to the other two rollers have little effect, only 2%. Substantially vertical movement of the rollers independently of each other. Between the roller axis and the disc diameter roller bearing an angle so that only the circumferential direction by force, without axial thrust, vibration, bearing load and conducive to life. Before starting the use of two-way hydraulic cylinder roller can be jacked up, no-load start, no auxiliary transmission device, the material to be fed to a certain thickness of material to touch the hydraulic cylinder when the pressure roller in the other direction, and gradually work into powder, start simple and smooth mill. When running with the metallic foreign body, roller will lift automatically, protective equipment. Horizontal disc and the cylindrical center of gravity of the roller mill is only vertical roller mill movement of the roller set, and the impact of all the dynamic reacting force in the vertical direction only. Compared to other roller grinding mill with rolls of small mass, inertia, and dynamic forces and vibration is very small, the mill rolls have been patented. Increase the bearing roller inside, it can withstand greater radial load. Grinding roller and disc liner chosen a better wear-resistant materials, no dangerous cracks. Adjustable roller liner to use, so its high utilization. Compared with other roll mill, the mill roll length liner life. Changes in the larger roller layers of material into the liner wear unevenly and foreign matter have good adaptability. The large size allows the feed, pre-broken to reduce the requirements. Easy to adjust the air inlet, a small footprint, low construction costs.