cement vertical roller mill

For the cement industry were 30,25,20,10,8.8 tons of annual production and other industries use to meet the users of different materials with different yield and grinding requirements. At the same time I also have fine vertical grinding mill, the State Development Center has fine vertical cement mill as the "Eighth Five-Year" period focused on promoting the application of high efficiency, new energy-saving products.

The working principle of vertical roller mill

1, the main structure and function

Roller is the main material for rolling mill parts. Mill built with two pairs of roller, each pair of rollers mounted on the same shaft, rotating at different speeds.

Disc fixed to the reducer output shaft, the upper part of the disc material bed, the bed material a circular groove.

PRM-type separator mainly composed of vertical roller mill ,roller, disc, compression device, reducer, motor, housing and other components.

Fineness of separation is an important component of the decision, which consists of adjustable speed drives, rotor, guide blades, housing, meals, fighting off the cone material, composed of the outlet, and the separator works similar.

Pressure device is called the grinding pressure of the components provided by the high pressure oil station, hydraulic cylinder, rod, storage and other components, able to exert enough pressure roller grinding of materials.

2, the working principle of vertical roller mill

The material flow through the separator, in the role of guide vanes and the rotor, the coarse material to the disc from the hopper cone, the fine powder with a mill with air, dust collection device in the system to collect, is the product, the material in the contact process with the gas being dried to the required product water, by adjusting the angle and the wind guide vane separator rotor speed can be different fineness of the product.

Motor through reducer drive the disc rotation, the current hot air from the air inlet into the mill, the material from the feed opening falls on the central disc; the centrifugal force, material to the disc edge and moved across the ring groove on the disc by the grinding roll rolling and grinding, to the edge of the disc, moving through the air with the wind at the starting of large particles falling back to disc on the direct re-grinding.

Compared with the ball mill, vertical roller mill with the following features;

Compared with the cement vertical mill to mill the advantage is obvious, in order to establish a more intuitive description of the characteristics of MPS vertical mill, following the annual output of 10 tons of cement and production of raw material preparation system, for example, compared with the two HRM vertical mill and ball mill kinds of program indicators.

Grinding efficiency; drying large capacity; into the grinding material Liaodu large, medium and large vertical mill can save two broken; products, chemical stability; stars are homogeneous gradation, product Liaoduo uniformity is conducive to burning ; process is simple; low noise, less dust, the operating environment clean; metal loss, high utilization; use of the economy.

Assuming an annual output of 10 million tons of cement in order to meet production needs, may use the following two options:

Programme 1: HRM1300 vertical mill grinding system

Programme 2: @ 2.2 × 6.5 米 closed-circuit grinding system

Table II installed capacity of the two programs, technical and economic indicators in Table III.

As can be seen from the above comparison, the choice of vertical roller mill to reduce annual operating costs only 380,200 yuan, and the level of technology and products to improve yield, save energy, improve the operating environment, reducing noise and pollution, and enhance ability to adapt to other aspects of the play is not assess the long-term benefits.

Buy Raymond Notes

Raymond Mill is mainly used for a certain hardness of stone milling process, such as limestone, barite, marble, feldspar, talc and so on. Mill widely used in chemical, metallurgy, mining, etc., has been widely used milling machine, milling machine manufacturers produce so many, especially in the Central Plains, mills, factories more springing up. Bigger the market, also mixed, and no interpreter standards, the standards mill where? Many users purchase a topic of concern.

Milling machine in the purchase, the first thing most people, surely that is the Internet search, then enter the site, control their own requirements, select the appropriate mill model. Satisfied with the device to see before they enter the contact page, select, and grinding machine manufacturers to contact.

Mill more manufacturers, mills, there are many models, so when purchasing mill, you need to figure out what their own grinding materials, the number of feed particle size is required to wear the number of projects, and ultimately production requirements, and then the actual work site, mills, equipment manufacturers will give you to configure the entire process.

Standard milling machine is very flexible, no fixed requirements, the most important is to meet the actual demand.

Here are some common Raymond Model

3R1410 Raymond mill Host Motor: 6 pole 7.5KW, 6 or 6 very very 5.5KW 4KW, Fan Motor: 2 pole 5.5KW, parser: 6 pole 1.1KW, Capacity: 120 mesh 0.6-1.2 tons per hour, 200 Head 0.4-0.7 tons per hour, 300 item :0.15-0.4 tons per hour.

3R2115 Raymond Host Motor: 8 pole 15KW, fan motor: 4 pole 11KW, Analyzer Motor: 6 pole 2.2KW, Capacity: 120 mesh 0.6-2.5 tons per hour, 200 item :1.0-1.5 tons per hour, 325 Head 0.5-0.9 tons per hour.

3R2615 Raymond Host Motor: 8 pole 18.5KW, fan motor: 4 pole 18.5KW, Analyzer Motor: 6 pole 2.2KW, Capacity: 120 mesh 2.0-3.2 tons per hour, 200 item :1.2-1.8 tons per hour , 325 :0.7-1.2 tons per hour.

3R3715 Raymond Host Motor: 8 pole 22KW, fan motor: 4 pole 18.5KW, Analyzer Motor: 6 pole 2.2KW, Capacity: 120 mesh :2.8-3.8 tons per hour, 200-mesh 1.8-2.8 tons per hour, 325 Head 0.8-1.8 tons per hour. 3R3016 Raymond Host Motor: 8 pole 30KW, fan motor: 4 pole 22KW, Analyzer Motor: 6 pole 2.2KW, Capacity: 120 mesh :2.9-4 .2 tons per hour, 200 item :1.9-3 .3 tons per hour, 325 project :0.9-2.2 tons per hour.

4R2715 Raymond Host Motor: 8 pole 22KW, fan motor: 4 pole 18.5KW, Analyzer Motor: 6 pole 2.2KW, Capacity: 120 mesh :3.0-4.0 tons per hour, 200 mesh 2.0-3.0 tons per hour, :0.9-2 .0 325 tons per hour.

4R3016 Raymond Host Motor: 8 pole 30KW, fan motor: 4 pole 22KW, Analyzer Motor: 6 pole 2.2KW, Capacity: 120 mesh :3.0-3.5 tons per hour, 200 mesh 2.0-3.5 tons per hour, 325 project :1.0-2 .5 tons per hour.

4R3116 Raymond Host Motor: 4 pole 37KW, fan motor: 4 pole 30KW, Analyzer Motor: 4 pole 5.5KW, Capacity: 120 mesh :3.8-6 .0 tons per hour, 200 mesh 2.5-4.5 tons per hour, 325 Head 1.4-3.0 tons per hour.

4R3216 Raymond mill Host Motor: 4 pole 37KW, fan motor: 4 pole 30KW, Analyzer Motor: 4 pole 5.5KW, Capacity: 120 mesh :4.0-6.3 tons per hour, 200 item :3.0-5.0 tons per hour, 325 Head 1.5-3.5 tons per hour.

5R4119 Raymond Host Motor: 4 pole 75KW, 4-pole fan motor 55KW, Analyzer Motor: 4 pole B7.5KW, yield: 120 mesh :4.0-8.0 tons per hour, 200 item :3.0-7.0 tons per hour, 325 Head 1.5-5.0 tons per hour

Vertical roller mill grinding cement technology

International Progress:

• In the past 10 years, the vertical roller mill for cement and slag grinding technology has made an important breakthrough.

• the world's largest cement producer Ruishi Hao Rui Group in 1998 and Loesche companies, Hon Chong Cement Plant in Vietnam into the first vertical mill for cement grinding. Since then, more and more vertical roller mill for cement and slag in the final grinding.

•vertical roller mill for cement producers traditional grinding system compared with the practical and the quality of the cement to produce the same concerns have been eliminated. Vertical mill grinding cement has many advantages, not only has the economic advantage, while versatile, represents the future direction of development of cement industry.

Since the first vertical mill grinding cement in use since the cement grinding process, especially a large cement grinding power consumption and reduce power consumption is also a great potential. Cement and slag grinding, the vertical mill grinding energy is about 50% of the traditional ball.

• vertical mill is an air swept mill, so the fan's energy consumption must be included in the grinding system. Generally speaking, the vertical roller mill grinding plant ball mill power consumption is about 70%, which is new on the market to other comparable grinding technology.

Vertical roller mill raw material recycling technology

5000t / d production line of raw material preparation using RMR57/28/555 vertical roller mill. In the trial production period, there are often caused by improper operation of bucket elevator loop current is too high, resulting in crushing bucket elevator, mill jump stop the phenomenon, not only to field a larger increase in the workload of staff, also affected production. Through the operator and the constant review and practice, the current form of a set of effective control measures to effectively prevent the occurrence of such phenomena.

Problems outside the circle bucket elevator model: NSE300 × 33350, transmission capacity of 450t / h, motor power 75kW, rated current of 140A, the alarm value of 150A. In actual production, often due to sudden changes in raw materials, incoming instability and other reasons, the status changed to wear, resulting in material outside the circle, resulting in high current hoist. Early in the production, operation of commonly used method is a rapid reduction of the volume of feed at the same time increase the grinding pressure, appropriate to reduce the speed of the powder, so that as many as possible with the gas from the powder mill, mill to reduce the volume within the material, thereby reducing the external of recyclable materials. However, in practice found that such methods of operation to adjust for too long, large number of materials from outside the mill, will eventually cycle crushing bucket elevator. As the hoist is a chain of relations with the vertical roller mill, skip hoist will stop after the mill shut down.

Improvements through exploration and discovery, when the cycle of bucket elevator reach the threshold current 140A, even to the alarm value of 150A, to take the following measures, which can effectively avoid the cycle of bucket elevator of death.

① trip into the grinding belt, prohibited materials into the vertical roller mill. ② to quickly lower the ground pressure, so that in the disc of material formed on a temporary thick layers, so that the cycle bucket elevator plummeted materials. ③ appropriate separator to reduce speed, so that in fine grinding as soon as possible from outside the mill (separator speed should not be too low to prevent the raw material through the rough.) ④ When the cycle of current bucket elevator downward trend and dropped to 140A, can reduce the feeding amount to 200 ~ 300t / h, open the feed into the grinding belt, adjust the grind to a steady state condition, then normal operation.

Practice has proved that such methods of operation is simple, rapid decrease in a relatively short period of time outside the volume of recyclable materials to effectively prevent the large amount of recyclable materials caused by circulating outside the bucket elevator crushing, grinding stop jumping phenomenon long-term operation of the mill has played a crucial role, thus ensuring the normal kiln feed, but also greatly reduces the power consumption of raw material grinding system

When 80 tons of stone production line (stone production line) in the jaw crusher and crusher configuration

Stone production line (stone production line), the basic equipment is mainly feeder, jaw crusher machine , impact crusher, and vibration screening machine, there are customers to the different needs of individual raw materials used in hammer crusher, cone crusher , impact crusher, and the corresponding roll crusher and other equipment. In the stone production line (stone production line) is the most common vibrating feeder jaw crusher impact crusher vibrating screening machine such as articles of stone production line.

Here are some things to stone production line configuration on some issues, configure the first set of stone production line needs a thorough understanding of the single, simple Take the 80 tons of stone production line configuration, the 80 tons of stone production line vibrating feeder how it should be? on the feeder all know in the jaw crusher evenly to send material, if that is not so easily jaw crusher there idling or sealing problems. Therefore, stone production line vibrating feeder must be, that said first production line under the 80 tons of stone (stone production line) of the feeder should configure the screen surface models.

Feeder configuration yields the size of the stone will seriously affect the whole production line, so feeder configuration should be careful, 80 tons of stone production line in the feeder should be configured ZWS-300x70 size of the feeder trough 3000x700 ( mm) greater than the maximum feed size is equal to 500 (mm) capacity is 60-120 (t / h, spindle speed of 350-800 (r / min) Motor power 7.5 (kw) Weight 3225 (kg) Overall dimensions 3705x1450x1250 (mm)

Broken jaw crusher machine output is actually can be said as the actual output of production lines, so the choice of jaw crusher is simple, to see how much output you need, then choose how much of the jaw crusher, I that when the capacity of 80 tons of stone production line should be configured PE500x750 the jaw crusher, the crusher inlet size is 500x750 (mm) maximum feed size 425 (mm) nesting population adjustment range is 50-100 (mm) Treatment capacity is 28.5-62.5 (m³ h) Eccentric shaft speed 275 (r / min) Motor Power 55 (kw) (may be configured according to customer requirements) Weight 10.3 (t).

Next is the small break Crusher choice, impact crusher machine, when selected should be chosen and the jaw crusher with production so as not to cause waste of resources, so we chose Impact Crusher is the FP-1010 Impact Crusher machine. The Impact Crusher Specification Φ1000x1050 (mm), inlet size 400x1080 (mm), the maximum feed size 350 (mm), capacity 50-80 (t / h) power is 75 (kw) Weight ( does not include motor) 12 (t) form factor is 2390x2040x2600 (mm).

Finally, vibrating screening crusher machine, vibrating screening machine used 3YZS1236 type, the vibrating screen screen surface layer 3, mesh size is 1.32 m, mesh size 5-50 (mm), capacity is 75-245 (m³ h ), speed is 974 (r / min) two-amplitude 6-8 (mm), motor power 11 (kw) Overall dimensions 4300x2537x2645 (mm) Weight 3200 (kg) screen surface with an inclination of 20 °, sieve size to 1200x3600 (mm).

Cone Crusher common problems

Cone Crusher is the latest development of an advanced high-power, large crushing ratio, high productivity, low energy consumption, product size uniform pieces and suitable for all kinds of ore crushing, hydraulic rock crusher. Used in metallurgy, construction, road building, chemical and silicate industry, raw material crushing, can be broken over the middle and middle-hardness of various minerals and rocks. Therefore, compared with their counterparts crusher, with great advantages: high-performance, product composition of good intensity, good stability, clear cavity convenient, high reliability, easy maintenance and easy to operate, low cost and easy operation.

Cone Crusher Working principle: work, the motor rotating shaft through the pulley or linkage device, cone crusher cone crusher cone shaft and the Department of dynamic force in the eccentric sleeve around a fixed point for the week rotating pendulum. So that the cone crusher broken bi sometimes near and sometimes they leave the solid loading put on the bar in adjustment of acetabular wall surface, so that ore constantly under attack in the crushing cavity, extrusion, and bending and crushing ore achieved.

Cone crusher is crushing equipment commonly used in the work process has demonstrated the following characteristics is to increase efficiency and extend the mechanical life of the method, then the following features:

(1) hydraulic system, the aircraft is used to adjust the hydraulic system of mine crusher row on the size of the hydraulic system can effectively ensure the safe operation of equipment. A foreign body in the crushing chamber, the hydraulic system can automatically move under the back cone, when the foreign body and excreted, under the system to automatically reset back of the moving cone. Back row to keep the original location of mine I continue to work.

(2) crushing chamber type, the crushing chamber type is fixed cone and fixed cone of Q form the geometric space. Crushing chamber shape on the overall performance greatly. Crusher chamber type is the major technical indicators broken. Crushing machine design from the rough broken into four specifications of the cavity, it has six possible combinations, which means that it is best suited for their unique requirements.

(3) Seal and reliable: The labyrinth seal, replacing the previous use of the water seal, so that dust and impurities can enter the body machine, thus ensuring the Run edible vegetable oil for cleaning, extended plain bearings, thrust ball bearing life, makes the machine reliable operation.

(4) easy to change: the past, replacement of broken wall crusher is very slow, cone crusher broken new structure to replace the wall very quickly. Because of the broken wall with card shoot, put broken bolts from the top of the wall fixed. Under the broken wall fixed hydraulic nut is tightened. On the back under the broken wall materials do not need to add any padding, so rapid change, the reduction labor intensity.

White House Defers To Pelosi On Tax Cuts

President Obama’s aides say the White House is trying to take a step back and let Democratic leadership figure out the best way to handle the question of the Bush tax cuts.

The president made his preference clear, and he’ll keep helping the Democrats on the stump with the rhetorical definition of their party versus the Republicans. A White House aide said it’s possible Obama might talk about the tax cuts issue during his Cabinet meeting scheduled for tomorrow.

Democrats are huddling tonight with members to see what sort of bill they could support so close to the critical midterm elections.

An administration official said the legislative affairs team is consulting with Speaker Nancy Pelosi’s office to be of assistance where they can. The aim is to craft a bill which helps vulnerable Democrats but exposes the Republicans, the aide said, adding that’s not as easy as it sounds.

When Freshman Rep. Gerry Connolly, for example, says he’d be okay with a temporary extension of the tax cuts for the middle class and the rich, that complicates things, the aide said. (Connolly (D-VA) represents one of wealthiest districts in the nation. He’s said he gets Democrats’ arguments about just the middle class, but he also wants to help his own constituents.)

But the White House aide said word on Capitol Hill is that Democratic staffers are trying to come up with something that puts more spin on the ball, perhaps by creating a new tax bracket for millionaires. “They are trying to figure out something along those lines,” the aide said.

ball mill