Cement in powder form can be changed from plasticity paste to hard stone-like body and can become a total cemented granular materials through physical and chemical processes after being mixed with water. So cement is a good mineral binder. Cement can be not only hardened in the air, but also better hardened in the water in which it will maintain and develop strength. So cement is kind of cementitious material which will be of stronger hardness in water. Cement mil is used for cement grinding. Cement crusher is applied for cement crushing. In cement mining, you need to choose suitable cement grinding mill and cement crusher.
1. Raw material preparation stage: it uses single-stage hammer crusher, jaw crusher, impact crusher to simply crush raw material, then uses Vertical grinding machine, roller press and ball mill to crush again.
3. Clinker grinding stage: it adopts DPX crusher to crush plaster and cement clinker is pre-milled by roller press, hammermill crusher and XPCF crusher and then grinded by flour mill. In the whole process, it may be seriously abrades steel ball, liner plate, grid plate.
DSMAC is also specializing in manufacturing Big Gold Teeth hammer and rotor matched to single stage hammer crusher, grinding roller and millstone matched to Vertical grinding machine, steel ball and liner plate matched to ball mill and Sandwich Super hammer and Big Gold Teeth hammer matched to XPCF crusher. We can also provide roller repair service for customer and make all-around consideration for you.
In cement production process, cement crusher is very important since most of the raw materials will have to be crushed before being used to process cement, such as limestone, clay, iron ore and coal, etc. Limestone is the largest amount of raw material during cement production. After limestone mining, limestone is generally of large size and high hardness. Therefore the limestone crushing is very important in the whole material crushing. Usually we choose jaw crusher for limestone crushing since jaw crusher is of easy principle, convenient maintainence and low cost. However, if the whole cement mining scale is of large size, we usually choose cone crusher or impact crusher to assit jaw crusher and to be secondary or tertiary cement crusher machine. Also cement conveyor is used to transport these materials to next procedure, such as vibrating cement screen to screen out required fineness. In some production sites, we use a whole mobile crusher to complete the whole cement crushing and screening production since the mobile crusher is equipped with jaw crusher, impact crusher or cone crusher, vibrating feeder,vibrating screen,etc.
In the cement grinding, grinding mill will be used to grind the cement clinker to an appropriate size to increase the size of its hydration, accelerate hydration rate so that it can meet the cement paste setting, hardening requirements. There are many kinds of cement grinding mill, such as ball mill, high pressure suspension grinding mill,coarse powder grinding mill, raymond mill, vertical mill,etc. In the exact production site, we can choose suitable cement grinding mill according to the exact requirement and material information. This procedure is almost the last process of cement production. So cement grinding will directly influence the products quality.
DSMAC has always pursued the service concept of "Create customer value, the customer is always right". As for service, clients' needs have always been our primary concern. Through standardized, differentiated and super valued service, we can reduce clients' psychological cost and use-cost, and ultimately increase clients' transition value, profitability and purchasing power. As a result, we can improve DSMAC's service brand competitiveness and lead the way of service for fellow competitors.
Service Network Presently, DSMAC has offices and branch companies in more than 10 countries and regions, and 31 offices in China. In addition to traditional after-sale service, our company offers internet sales and product trace services. We guarantee that we will offer our valued clients timely and thorough services.
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Cement grinding unit, or called cement grinding plant, is an individual grinding plant in the finished cement production. The new-type cement grinding units adopt pre-grinding technology. The cement grinding units not only reduce the particles of feeding materials, but also help to produce cracks and flaws inside the particles, which largely increase production capacity of cement mill, reduce the energy consumption.
The cement grinding machine includes cementdryer, cement ball mill, cement roller press, powder selecting machine, conveyor and other cement equipment. We can provide scheme design for free according to the requirements of users, and offer appropriate equipment to ensure smooth production with less investment and high profit.
The cement grinding process include the admixture crushing, cement batching station, pre-crushing, high and fine powder grinding, fine powder separation, dust treatment, automatic control and other technologies. The finished cement can meet the requirement for high yield, high quality and energy saving.
As a professional EPC project provider, we have the ability to provide the custom-design solutions to cement manufacturing for every client. Our solution covers all stages including equipment installation, operation, production, maintenance, we will send technicians to guide training, until the customer is satisfied.
For the structure, of the cement mill, we adopts the advanced obstructing equipment for internal powder, add the activated device to the fine grinding chamber, and there is the special grate plate at the end of the cement mill, which can reduce the size of the grinding medium, greatly improve the grinding efficiency, and achieve the purpose of high output and low energy consumption.
The cement grinding unit has advantages of simple structure, strong controllability, and easy to operate or maintain. The discharge concentration is less than 50mg/Nm3, lower than the discharge standard, and protect the environment of the production site effectively.
The production process overcomes the disadvantages of traditional equipment. The fineness of product is easy to be adjusted, apply for different requirement of fineness. The equipment also has advantages of large heat dissipation area and low temperature inside mill. The finished product of new-type cement grinding unit has high quality and large capacity.
As for the layout, the cement grinding unit is built near the sales market of cement. The most of cement admixture is the industrial residue, and cement grinding plant can greatly consume the industrial residues like slag, fly ash, slag, coal gangue. So the cement grinding unit brings green benefits well.
Traditional cement factories belong to high-pollution and high-energy consumption industries and do not meet the goals of energy conservation and consumption reduction in the development of modern industry. Cement grinding unit is a key link in cement plant. To achieve energy saving and consumption reduction in the cement industry, we must proceed from the cement grinding unit. Through a series of research and analysis, the following seven methods can effectively reduce the energy consumption of cement grinding plant.
Make full use of various industrial waste slags, such as blast furnace slag, steel slag, fly ash, and burned coal gangue. These waste slags are treated at high temperature and help to improve the performance of cement. At the same time, it also reduces the particle size of the grinding material, which can reduce the power consumption per unit product.
Under the fixed process conditions, when the 45m sieve residue and specific surface area of cement are controlled at a reasonable level, particles below 3m and above 45m can be limited, so as to obtain good cement performance and lower production costs. Compared with other methods, this fineness control method has the advantages of simple operation and effective control. As long as a sample is taken for a sieve analysis test and specific surface area determination, it can provide a basis for the operation of the cement mill.
In the cement grinding process, a small amount of admixture is added to eliminate the adhesion and aggregation of the fine powder, accelerate the grinding speed of the material, improve the grinding efficiency, and also increase the content of 3-30m by 10-20%, which is conducive to the high-quality, energy-saving and high-yield of cement ball mill. Such additives are collectively referred to as grinding aids. In most cases, the use of grinding aids can increase the output of the cement ball mill without changing the cement production process, the purpose of improving the quality of cement production line, reducing costs, and producing green high-performance environmentally friendly cement can be achieved.
In the cement production process, the use of new technologies and processes can greatly reduce energy consumption, save investment, and achieve economic benefits. Such as multi-point feeding, multi-point retrieving, circulating grinding process; extruder combined grinding process, etc. At the same time, we must vigorously promote to use energy-saving cement grinding equipment. For example, instead of traditional cement ball mills, select new type cement vertical mills, trapezoidal mills, and other energy-saving cement grinding equipment.
At present, these two measures are the main reform directions for the cement mill optimization. The following effects can be achieved: the output is increased by 30% -60%, the power consumption is reduced by 25% -40%, and the power consumption per ton of cement is reduced by 8-12kWh. It can effectively increase the strength of cement. Generally speaking, the strength of cement can be increased by more than 5MPa.
Frequency conversion technology is one of the energy-saving technologies. This technology can help some auxiliary equipment in cement plant to save energy, such as fans, batching metering, and variable-speed equipment. At the same time, it also meets the characteristics of low-speed operation and large starting torque of the cement ball mill and realizes the continuous adjustment of the running speed of the cement ball mill. There is no inrush current when the motor starts, the starting distance is sufficient, and the protection function is perfect. Ensure the quality of process control and save maintenance costs.
The use of low-voltage motor full-phase control technology, it has the advantage of automatically adjusting the output power of the motor when the load is lightly loaded and heavily loaded so that the motor can save electricity by 15% at the time. Adopt a green lighting system, through these technical measures, greatly improve the power factor, reduce the reactive power demand, and reduce the loss of active power.
In general, correctly coordinating the relationship between quality, output, and the energy consumption is the basic way for cement grinding to save energy and reduce consumption. Traditional cement mills have low energy utilization rate and do a lot of useless work. The energy-saving technology should be the basic task of transforming the cement grinding process, and all these need to be established on the basis of a certain quality index control. To achieve a reasonable particle ratio of cement materials, it should meet the gradation requirements of performance, and add an appropriate amount of industrial waste residue.
Description The cement grinding station with an annual output of 1 million tons adopts the technology of separately grinding clinker and slag, among which the clinker grinding adopts the combined grinding process composed of two 4.2m 13m cement mills. The production process of the grinding station is stable, achieving the goal of high quality, high yield and low consumption.
This 500,000t/y cement grinding station is constructed in Russia. Jiangsu Pengfei Groupundertakes the construction of this cement grinding line from Star River Industrial Development Co., Ltd. which is in the Economic Cooperation Zone of Heihe City in Heilongjiang Province. Pengfei is responsible for the process design of the whole project.
This 2,000,000 t/y cement grinding station or cement grinding machine could serve concrete mixing plants and concrete pipe pile factories. It could also be used in industrial construction project and civil construction project. Jiangsu Pengfei Group provides complete project plan and process equipment. It is an independent and complete cement production line including cement grinding, bulk packaging, and packaging and delivering.
Pengfei Group provides the complete project plan of this 1000000 tons/year slag powder production line. We also manufacture process equipment of this production line. We adopt a close circuit grinding system consist of 1400450 roller press, 3.813m ball mill, and 0-SEPA3000 separator. We set six1018m powder storage silos for this slag powder processing equipment. The total storage capacity is 6000 tons. We have four 220 m3/min oil-free lubricating air compressors to provide compressed air. Compressed air is dried and purified by dryer and water oil separator.
Cement plant is necessary for cement production, mainly consist of a series of cement equipment apply for preparation of cement raw materials, clinker production, and finished cement production, such as cement mill, cement crusher, rotary kiln, cement roller press, cement dryer, clinker cooler, cement silo, and related cement plant equipment. AGICO CEMENT is a cement plant manufacturer who owns ability to manufacture cement equipment and provide EPC turnkey project for cement plant.
AGICO Cement is a cement plant manufacturer with production capacity of 30,000 tons of equipments and structure parts and 20,000 tons of casting parts.own production equipment of 8m Vertical Lathe, 10m gear rolling machine, 8m Gantry milling machine, 200mm floor-type boring and milling machine,1203200mm bending machine, 150t crane and 40t electric furnace.
The cement roller press is a kind of cement equipment for brittle materials, apply for cement clinker, and cement raw material, gypsum, coal, quartz sand, iron ore, blast furnace slag, and other materials.
The cement roller press is generally applied to the cement grinding plant, according to the real working process, cement roller press works with cement ball mill or vertical cement mill, which helps cement grinding plant to works well.
As new-type and energy-efficient cement grinding machine, cement roller press has advantages of energy-saving, high efficiency, less steel consumption and less noise. Both apply for new cement plant building and old cement plant revamping. According to the data, roller press helps ball mill system to increase the output by 30-50%. The 0.08mm fine material in the extruded material cake accounts for 20-35%, and smaller than 2mm accounts for 65-85%.
install the roller press in the cement grinding plant, the high pressure load is transmitted to the layer of the grinded material through the diameter of the double roller, most of the energy is used for the mutual extrusion between the materials. The sound energy and thermal energy generated by the friction of the material are transformed into the deformation energy of the material, which causes deformation, tearing and pulverization and fully utilize the potential of the cement grinding equipment, increase the output by 50-100%, and reduce the total energy consumption by 20%-30%. Promote the production efficiency of the entire system.
The material after grinding is greatly reduced in both particle size and the Bond function index, thereby greatly improving the grinding condition of grinding machine, and the power consumption of the entire cement grinding system is significantly reduced. It can save25-50% energy compared to traditional grinding methods, and the annual electricity saving are considerable.
Compared with the tube mill, the roller press is simple in structure, small in size, light in weight, and takes up less space in the workshop. It can save civil construction investment and also facilitate the original investment. In addition, the operation and maintenance of the roller press is very simple.
The material is squeezed and smashed continuously in the roller cover, and the harmful dust is not easy to spread. At the same time, the noise of the roller press is much smaller than that of the tube mill because of no impact.
The traditional tube mill is limited by processing, transportation, heat treatment and other conditions, and the large-scale tube mill is greatly restricted. The roller press grinding system solves such problems well.
The roller press works according to the principle of high-pressure layer pulverization, and adopts the work mode of single-grain pulverization. The brittle material is subjected to high pressure extrusion (the pressure of the machine in the pressure zone is about 150 MPa), the particle size of the material is rapidly reduced, the fine powder content of less than 0.08 mm reaches 20-30%, and the material of less than 2 mm reaches 70% or more, and a large number of cracks are present in all extruded materials, so that the energy required for the material to be ground in the next process is greatly reduced.
The main body of the roller press is two rollers that rotate in opposite directions, one is a fixed roller and the other is a movable roller. The brittle material is fed into the weighing chamber with the load cell by the conveying device, and then passes through the feeding device of the roller press into two rolls of the same size and opposite to each other, and the material is pulled into the nip by one side of the roller. The material is pressed into a dense material cake with high pressure, and finally falls from the nip, and is discharged from the hopper by the conveying device. The cake is further dispersed or ground by the next process.
Both the cementball mill and the cement roller press have their own advantages and disadvantages, but in actual production, the cement roller press has the advantages that the ball mill does not have, mainly reflected in the following points.
Note: Due to the large force of the roller of the roller press, the roller press has some problems, such as the material and the wear of the roller surface, the bearing is easily damaged, and the gear of the reducer is prematurely broken. In addition, the process operation process is strict. For example, the feed material column is required to be dense and full, and a certain feed pressure is maintained. The feed amount control should be appropriate, and the grinding process system configuration should be appropriate, otherwise its superiority cannot be exerted.