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cement ball grinding mill

chaeng-mining equipment suppliers

chaeng-mining equipment suppliers

Slag powder is high-performing admixture for concrete in that it increases the concretes ability to resist compression, tension, shear, and bending stresses. A major trend that characterizes the building material industry is to replace equal amount of cement with slag powder in making concrete or cement products.

Cement production line is the production line composed of a series of cement production equipment, mainly involving crushing, prehomogenization, raw material preparation and homogenization, preheating and decomposition, sintering of cement clinker, cement grinding and packing and so on.

The particular heat treatment technology is used for the big gear ring manufactured by Xinxiang Great Wall Machinery which makes the improvement in the structure optimization and the hardness of the product. The wear-resistant and anti-impact performance is also enhanced greatly.

The cement kiln, also called cement rotary kiln, which is mainly used for calcinating cement clinker, is the main equipment for the new dry type cement production line. This cement equipment is mainly composed of cylinder, supporting device, supporting device with catch wheel, transmission device.

The ball mill for clinker is an efficient tool for fine powder grinding. It is mainly used to grind the clinker and raw materials in cement industry and also can be applied in metallurgy, chemical, electric power and other industries to grind all kinds of ores. Cement ball mill is not only suitable for over-flow grinding.

Our raw materials vertical roller mills are widely used in the concrete and mining fields, and are also used to process gypsum. These units can process both raw and recycled materials, while helping to reduce waste and preserve virgin supplies of these materials.

ball mill noise control in cement grinding process

ball mill noise control in cement grinding process

Ball mill is a kind of grinding equipment in mining field and cement plant.It can grind hard stones and materials not greater than 320 MPa, such as mineral powder production lines, cement production lines and other grinding equipment supporting applications. Is there any way to eliminate noise?

Ball mill is mainly composed of ball mill rollers, gears, bearings, transmissions and motors.It consists of a hollow shaft and a grinding head for feeding and discharging. The cylinder is a long cylinder. It contains a grinding body which is made of steel. Inside the steel cylinder is ball mill liner. And according to different diameters and a certain proportion into barrel, grinding body can also use steel sections.When ball mill is running, gears, parts like bearings, transmissions and motors make noise, but these noise sources are different, so are the primary and secondary positions of sound sources.

Sound source analysis and measurement of intermittent ball mill unit shows that large tanks are main noise sources; gears, bearings, transmissions of sand production lines and motors are relatively minor sound sources.Because of the friction between steel ball and cylinder, when cylinder rotates, steel ball is lifted and raised to a certain height. Gravity of steel ball, it finally makes noise along a certain track.From the perspective of sound power, sound power radiated by large tank is dominant, while sound power radiated by other parts is significantly lower, which is more than an order of magnitude.

The noise of intermittent ball mill is mainly caused by collision and grinding of steel balls, materials and liners.This kind of noise is mechanical noise, and it radiates outward from tank surface.The same type of energy-saving ball mill and sand production line, when there is a difference in crushed materials or amount of feed, noise generated during operation will also vary greatly.

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cement ball mill - cement grinding machine - cement mill | agico

cement ball mill - cement grinding machine - cement mill | agico

The cement ball mill is a kind of cement grinding mill. It is mainly used for grinding the clinker and raw materials of the cement plant, and also for grinding various ores in metallurgical, chemical and electric power enterprises. It has the characteristics of strong adaptability to materials, continuous production, large crushing ratio and easy to adjust the fineness of grinding products. The cement ball mill can be used not only in dry method cement production line but also in wet method cement production line. In addition, it can realize the simultaneous grinding and drying, which is the important equipment for cement grinding. AGICO is one of the leading cement ball mill manufacturers in China. We supply the high quality equipment. If you are interested, please feel free to contact us.

The materials are uniformly fed into the first chamber of the mill by the feeding device through the feeding hollow shaft. There is a stepped or corrugated liner plate and some steel balls of different specifications in the chamber. The cylinder rotates approximately once every couple of seconds, and the centrifugal force produced when the cylinder rotates brings the steel ball to a certain height and then falls down. This kind of impact force will have a grinding effect on the material. After the kibbling in the first chamber, the materials will enter the second chamber through the monolayer partition board, which is inlaid with a flat liner plate and contains steel balls to further grind the materials. After that, the powder will be discharged through the discharge device.

AGICO Group is an integrative enterprise group. It is a Chinese company that specialized in manufacturing and exporting cement plants and cement equipment, providing the turnkey project from project design, equipment installation and equipment commissioning to equipment maintenance.

energy efficient cement ball mill from flsmidth

energy efficient cement ball mill from flsmidth

You decide whether to operate the mill in open or closed circuit, with or without a pre-grinder and with side or central drive, according to your plant layout and end product specifications. Even the lining types are tailored to your operating parameters.

In addition, the large through-flow areas enable the mill to operate with large volumes of venting air and a low pressure drop across the mill. This reduces the energy consumption of the mill ventilation fan and keeps your energy costs down.

The mill is based on standard modules and can be adapted to your plant layout, end product specifications and drive type. The horizontal slide shoe bearing design enables much simpler foundations and reduced installation height, making installation quicker and less expensive.

Our shell linings are designed to suit the task at hand. In our two-compartment cement mills, the first compartment (for coarse grinding) has a step lining suitable for large grinding media. It protects the shell while ensuring optimum lifting of the mill charge. In the second compartment (and also in our one-compartment cement mills) we use a corrugated lining designed to obtain the maximum power absorption and grinding efficiency. For special applications, we can supply a classifying shell lining for fine grinding in the mill.

In fact, the entire mill is protected with bolted on lining plates designed for the specific wear faced by each part of the mill. This attention to detail ensures both minimal wear and easy maintenance. When a wear part has reached the end of its life, it is easily replaced.

The grinding media are supplied in various sizes to ensure optimum grinding efficiency. The STANEX diaphragm is designed to maximise the effective grinding area, enabling a higher throughput. It is fitted with adjustable lifters to ensure the material levels in each compartment are right. Best of all, the STANEX diaphragm works for all applications, even when material flow rates are high and the mill feed is moist.

The mills are typically driven by our FLSmidth MAAG LGDX side drive - gearing rated to the latest proven AGMA standards. The mill drive is provided with an auxiliary drive for slow turning of the mill. The LGDX includes two independent lubrication systems, one which services the girth gear guard and intakes more dust, and a second which supplies oil for the fast-rotating gearing and bearings and stays clean. If requested, however, the mills can be provided with a central drive: the FLSmidth MAAG CPU planetary gearbox. The mill design differs slightly, depending on whether the side or central drive is chosen.

Each grinding compartment has two man-hole covers to give easy access for maintenance. As there are minimal moving parts, the maintenance requirement is low and simple changes like replacing wear linings and topping up grinding media can be completed quickly and easily. Horizontal slide shoe bearings prevent oil spillages from the casing and offers easy replacement of slide shoes.

Buying a new mill is a huge investment. With over a century of ball mill experience and more than 4000 installations worldwide, rest assured we have the expertise to deliver the right solution for your project. Our ball mill is based on standard modules and the highly flexible design can be adapted to your requirements. The mill comprises the following parts.

The mill body consists of an all-welded mill shell and a T-sectional welded-up slide ring at either end, the cylindrical part of which is welded onto the ends of the shell. The mill shell has four manholes, two for each grinding compartment.

Each slide ring runs in a bearing with two self-aligning and hydrodynamically lubricated slide shoes. One of the slide shoes at the drive end holds the mill in axial direction. In the others, the slide rings can move freely in axial direction to allow for longitudinal thermal expansion and contraction of the mill body.

The slide shoes are water-cooled, and each bearing is provided with a panel-enclosed lubrication unit including oil tank, motorised low- and high-pressure oil pumps, as well as an oil conditioning circuit with motorised pump for heating/cooling and filtration of the oil.

The stationary steel plate inlet duct leads the venting air into the mill. It is equipped with a manually operated throttle valve and a pressure monitor to adjust the pressure at the inlet end, thus preventing dust emission from the inlet. The feed chute is lined with bolted-on wear plates and slopes down through the air duct to the mill inlet opening.

The more control you have over the mill, the better your grinding efficiency is likely to be. Our ball mills include monitoring systems to continuously measure the material and air temperatures as well as the pressure at the mill exit. The venting of the mill is adjusted by a damper in the inlet to the mill fan. And the material fill level is continuously monitored by means of sensors. For ball mills operating in closed circuit, the circulation load is monitored by weighing the flow of reject material from the separator. These measures ensure you achieve optimum mill performance, giving you the quality, efficiency, safetyand reliability that you need.

FLSmidth provides sustainable productivity to the global mining and cement industries. We deliver market-leading engineering, equipment and service solutions that enable our customers to improve performance, drive down costs and reduce environmental impact. Our operations span the globe and we are close to 10,200 employees, present in more than 60 countries. In 2020, FLSmidth generated revenue of DKK 16.4 billion. MissionZero is our sustainability ambition towards zero emissions in mining and cement by 2030.

ball mill for cement grinding cement ball mill | ball mill manufacturers

ball mill for cement grinding cement ball mill | ball mill manufacturers

The cement industry is a high energy consumption industry. Improving production efficiency and reducing energy consumption are the manufacturing principles that cement enterprises have been following. Cement ball mill is a kind of important cement equipment in the process of raw material preparation and finished product grinding in cement plants. It is mainly used to grind limestone, clay, and other cement raw materials, as well as calcined clinker. As we all know, in the whole process of cement manufacturing, the power consumption of traditional cement ball mill accounts for about two-thirds of the whole plant. According to statistics, the power consumption per ton of cement production is no less than 70 kW / h, but the effective utilization rate of this part of electric energy is very low. In order to improve the output of the cement ball mill grinding system and reduce energy consumption, we have done some researches and analysis and finally, find out effective solutions.

The application of pre-grinding technology is the main way to greatly increase the output of cement ball mill grinding system. According to the theory, it can be divided into pre-crushing and pre-grinding.

Pre-crushingit means to set up a fine crusher in front of the ball mill. Parts of the grinding tasks undertaken by the ball mill coarse grinding chamber are handed over to the high efficient fine crusher. This method features low investment and obvious effect, but it is necessary to solve the problem of material iron removal because the metal impurities such as iron in clinker will cause destructive damage to the crusher. After adding the pre-crushing equipment, the internal structure of the cement ball mill should be adjusted accordingly. As the particle size of the material is greatly reduced, the crushing capacity of the coarse grinding chamber should be appropriately reduced and then improve its grinding capacity.

Pre-grindingit refers to adding a grinding machine in front of the cement ball mill to increase the output of the original grinding system by a large margin. This method features large investment and relatively complex process but it can increase the output of cement ball mill by up to 50%. The equipment used for pre-grinding mainly includes rod mill, cement roller press, etc.

The function of cement separator is to reduce the unnecessary grinding amount of cement ball mill and improve its grinding efficiency by screening out the particles with certain fineness in time. The key technologies of cement separators are dispersion, classification, and collection.

Classification means that after materials are dispersed, the separator will make full use of the air classification function to separate the coarse and fine particles and send them to their respective outlets.

The JD series cyclone air separator is a new type of high-efficiency cement separator. Its powder selection efficiency is more than 80%, with small size, lightweight, flexible layout, and other characteristics. Besides, its system adopts a negative pressure operation with no dust pollution, so it is very suitable for cement manufacturing.

After referring to the characteristics of the closed-circuit grinding process, a new type of closed-circuit grinding system is formed by a cement ball mill and high-efficiency powder separator. The practice shows that the effect of increasing production and saving energy of this system is remarkable, which is more than 30% higher than that of the open-circuit grinding system and ordinary closed-circuit grinding system. It provides a new technical approach for increasing cement output and saving energy.

Redetermine the chamber length and adjust the grinding media gradation and material flow rate according to the material characteristics are very important for adding a pre-grinding system and powder separator, as well as the internal transformation of cement ball mill. Actually, each chamber of the ball mill has the function of crushing and grinding, but the degree is different. The main function of the coarse grinding chamber is crushing, so it should select large-diameter steel balls as the grinding media. The fine grinding chamber is used for grinding, so small diameter balls are more suitable. Materials are filled between these grinding mediums. The grinding efficiency depends on the contact area. If the contact area is large, there will be more grinding opportunities, and the product production rate per unit time will be high.

Grinding chambers adopt lining plates to enhance their function. The new high-efficiency lining plates on the market now integrate and optimize the functions of various lining plates so that one kind can give full play to the advantages of various types, maximizing the use of energy and reducing reactive power loss.

Due to the influence of many factors, such as the change of material particle size and grindability, the reasonable grinding media gradation is not constant, but relative. After a period of production, with the continuous wear of steel balls, their total load becomes smaller. We need to supplement the grinding media regularly.

AGICO Group is an integrative enterprise group. It is a Chinese company that specialized in manufacturing and exporting cement plants and cement equipment, providing the turnkey project from project design, equipment installation and equipment commissioning to equipment maintenance.

cement ball mill - jxsc machine

cement ball mill - jxsc machine

The cement ball mill is mainly used for grinding the finished products and raw materials of cement plants, and is also suitable for grinding various ore and other grindable materials in industrial and mining enterprises such as metallurgy, chemical industry, and electric power. Cement grinding is the last process of cement production, it is to mix cement clinker and a small amount of gypsum, and then grind the mixture to a certain fineness, that is cement. You may also interest in the ball mill product price, lime ball mill, quartz ball mill. Cement grinder types Cement ball mills can be divided according to discharge method: grate ball mills and overflow mills, and can be divided into wet mills and dry mills according to their processing conditions.

The main working part of the cement grinding mill is a rotary cylinder mounted on two large bearings and placed horizontally. The cylinder is divided into several chambers by a partition plate, and a certain shape and size of grinding bodies are installed in each chamber. The grinding bodies are generally steel balls, steel forgings, steel rods, pebbles, gravel, and porcelain balls. In order to prevent the cylinder from being worn, a liner is installed on the inner wall of the cylinder. When the cement grinding machine rotates, the grinding media adheres to the lining surface of the inner wall of the cylinder under the action of centrifugal force and frictional force with the lining surface of the inner surface of the cylinder, and rotates with the cylinder and is brought to a certain height. Under the action of gravity, it falls freely. When falling, the grinding media acts as a projectile and impacts the material at the bottom to crush the material. The cyclic motion of the abrasive body rising and falling is repeated. In addition, during the rotation of the mill, the grinding body also slides and rolls, so the grinding action occurs between the grinding body, the liner and the material, making the material fine. As new materials are continuously fed at the feed end, there is a material level difference between the feed and discharge end materials to force the material to flow, and the axial thrust of the impact material when the grinding body falls also breaks the material flow. Air movement also helps material flow. Therefore, although the mill barrel is placed horizontally, the material can slowly flow from the feed end to the discharge end to complete the grinding operation.

Ball mill liner The liner of cement dry-type ball mill can be divided into ceramic, granite, rubber, high manganese, magnetic liner and other materials. The function of liner is mainly to protect the cylinder from the direct impact of materials and steel balls and extend the service life. At the same time, the liner plate can also adjust the running track of materials. Generally, the head grinding bin is equipped with hard liner plate, which can enhance the impact force of materials and accelerate grinding. The liner plate of the fine grinding bin is corrugated liner plate or flat liner plate, which can enhance the grinding effect of materials.

Ball mill grinding medium The grinding medium of cement dry ball mill includes steel ball, steel rod, steel pipe, stone, porcelain ball, etc. the steel ball is divided into cast iron, bearing steel, carbon steel and other materials, and the diameter of steel ball varies from 15mm to 125mm. The steel bar is short cylindrical or conical, which has line surface contact with the material and strong grinding effect.

Cement ball mill advantages 1. It has strong adaptability to materials, continuous production and large processing capacity. The equipment has stable performance, is convenient for large-scale production, and meets the needs of large-scale production of modern enterprises. 2. The crushing ratio is large, the feeding size can reach 50 mm, the discharging particle size can be controlled, and the particle quality is good. 3. Cement dry-type ball mill is mainly used for grinding raw materials and clinker (finished products and raw materials) in cement plant, and also for grinding various ores and other grindable materials in metallurgy, chemical industry, electric power and other industrial and mining enterprises. It can be used for open flow grinding and circular flow grinding composed of powder concentrator. 4. The structure is reasonable, firm and can be operated under negative pressure. Cement dry ball mill has good sealing performance, environmental protection, simple maintenance, safe and reliable operation. Disadvantages But at present, the overall efficiency of cement dry-type ball mill grinding is low and energy consumption is large. Although the rolling bearing transmission mode is used now, the cement mill process is still the most power consuming part of the enterprise. Moreover, the cement dry-type ball mill is generally medium and long grinding, with large investment and high cost.

The application of ball mill in cement industry dates back more than 100 years. The ball mill for cement grinding plant is mainly of high fineness, dry grinding method, and the process is mainly of open circuit process and closed circuit process. The equipment of ball mill used in cement plant includes vertical cement mill, roller press and ball mill, etc.

The cement ball mill in cement plant is usually divided into 2-4 silos, the most representative of which are the new type of high fineness cement ball mill and open flow high fineness cement ball mill. There are three cement processing circuits. 1. Open circuit grinding The ball mill in the cement plant for open circuit grinding consists of grinding bin, dust collector and ball mill. Advantages: the cement plant process is the simplest, with less investment and simple operation and maintenance. Disadvantages: serious over grinding in the mill, low efficiency, difficulty in fineness adjustment of finished products, high power consumption.

2. Closed circuit grinding Closed-circuit grinding is widely used in cement mills all over the world. Cement grinding unit is widely used in the United States, Germany, France, Japan and other developed countries. For example, 95% of cement in Japan comes from closed-circuit grinding. The cement plant machinery of closed-circuit grinding consists of feeding system, finished product bin, powder concentrator and dust collection equipment. The process is relatively complete. The disadvantages are a large investment, many equipment and complex operation.

According to many years of practical production experience, JXSC summarizes that cement producers with a production capacity of fewer than 30 tons per hour are suitable for open circuit grinding, and closed-circuit grinding for large-scale production can be more economical.

Matters need attention 1. Cement has corrosion, which affects the service life of steel ball and increases the production cost. 2. Different wear-resistant microelements in different materials of wear-resistant steel balls will be damaged, which will cause poor wear-resistant effect and serious waste of clinker grinding mill. 3. During cement grinding, the material temperature may be higher than 100 , leading to dehydration of most gypsum or complete dehydration, causing coagulate of cement, which requires corresponding cooling measures, including mill ventilation, cylinder water cooling, etc. 4. After each clinker grinding, clean the cement grinding system, so as to avoid inconvenience to the next start-up due to slag material deposition.

Cement mill price Cement ball mill specially used for grinding cement clinker and other materials in building materials, cement production, metallurgical ceramics, electric power and petrochemical industry. JXSC can design and manufacture special cement ball mill equipment according to the output and fineness requirements of users. Contact us for machine selection and a price quotation.

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