Chaeng Vertical roller mill Introduction

Vertical roller mill is typically designed to deal with industrial waste slag. Due to high physical and chemical activity, and potential hydraulicity, waste slag has been widely as admixture matters in the cement industry to replace the equal cement in the concrete to improve the quality and durability of the concrete.

After almost a decade cooperation with experts on vertical mill manufacturing and scientific research institutes both in home and abroad, the GRM series vertical mills dedicated to be developed and produced by chaeng, have the characteristics of reliable performance, compact structure, convenient maintenance and outstanding energy saving, etc., after incessant perfection. At present, we can produce the supporting raw material vertical mill,coal vertical mill, and cement vertical mill that can cater to 300-5000 t/d cement production line, and the series slag vertical mills with annual production capacity of 0.2 million tons, 0.3 million, 0.45million tons, 0.6 million rons,0.9 million tons and 1.2million tons.

Vertical roller mill Unique design characteristics

1.The compound separator improved power selection efficiency.

2.Has automatic function of roller uplifting and down falling and can realize idling startup.

3.Adopt the sealing of jointing arc board, simple and reliable in structure with good sealing effect.

4.Resorting to the roller turning equipment can conveniently turn the roller out of the mill for overhauling.

5.Mechanical limiting structure can avoid the direct metal friction and collision between roller and millstone, increasing the use security.

6.The operation pressure is low in hydraulic pressure system, decreasing the oil leaking failure and vibration of mill, which is conducive to operation and management.

7.Roller bearing adopts the concentrated cycle lubricating of thin oil, guaranteeing the running of bearing under the conditions of low temperature and pure grease and effectively prolonging the longevity of bearing.

Vertical Roller Mill Structure

Below is the structure of the vertical roller mill diagram, which is composed of a separator, roll grinding, grinding, pressure device, reducer, motor, shell and other components. The separator is an important component for ensuring product fineness, it consists of the drive system, rotor, guide vanes, a shell, a coarse powder blanking cone outlet, etc.

The grinding roller is the main components of compacted crushed to the material, which is composed of the roller sleeve and roll heart, axle and bearing and roller bracket etc.. Each friction has 2 ~ 4 grinding roller.

Grinding disc is fixed on the reducer shaft, driven by the speed reducer rotating disc.

The pressure device is provided an important part of grinding pressure, which is composed of high pressure oil station, a hydraulic cylinder, a pull rod, an energy accumulator and the like, can exert enough pressure to make the material crushing and grinding roller. But the spring pressure device.

To achieve the requirements of environmental assessment of the activity of lime kiln manufacturers

In order to promote and application of new active lime rotary kiln, accelerate the promotion of new energy-saving emission reduction technologies to improve energy-saving environmental protection level. Chaeng positive response to environmental pollution-free policy for the production of lime kiln to strictly control.

Chaeng lime kiln process description:

Material from the kiln (cylinder of the high-end) into the kiln calcination. Due to the tilting and slow rotation of the cylinder, the material moves both in the circumferential direction and in the axial direction (from the high end to the low end), continues the process of decomposition and sintering, undergoes physical and chemical changes, Material by the kiln hood into the grate cooler cooling. Fuel from the kiln head into the kiln, the combustion of waste gas and heat exchange of materials, derived from the kiln.

Great Wall mechanical advantages:

1, advanced technology, high production efficiency, good quality lime

The Lime Rotary Kiln produced by the chaeng adopts advanced vertical preheater with advanced structure and low pressure loss, which can effectively improve the preheating effect and improve the production efficiency. The lime produced is very good and the lime activity is more than 300 ml. The ideal energy-saving environmental protection lime kiln equipment.

2, energy-saving calcination, advanced calcination mechanism

Furnace design uses fully sealed calcination mechanism, the kiln fire-resistant insulation layer using multi-layer refractory, mild, furnace insulation design life of more than 5 years. In order to effectively use energy, the upper and lower part of the furnace using heat exchange way, greatly reducing the heat from the top and bottom of the loss.

3, using the inverter, energy-saving equipment operation

The lime kiln used in the production of power are used in the inverter control and operation, to avoid a large horse-drawn car and no load no-load operation of the phenomenon, saving an average of 40% or more.

Lime rotary kiln Investment income:

Active lime is an important auxiliary raw material for steelmaking. The use of active lime has a series of features such as improving the quality of molten steel, increasing production, reducing steel consumption and cost, and stable operation. Where the use of active lime steel-making enterprises have achieved significant economic benefits.

The data show that over the past decade, China's steel lime production increased by 40%, but the activity of more than 300ml of high-grade lime from only 27% to 29.5%, low utilization rate, so good quality lime production And the application prospect is huge.

New Type of Lime production line

Due to the temptation of 20% growth of lime demand for calcium carbide, steel industry, a lot of kilns are put into use in the market. But the production technology and product quality can't meet the need of modern production; the activity degree of product is low, mild and excessive calcination cannot be controlled give rise to fuel consumption and serious environmental pollution.

As a result, the new environmental protection lime kiln is sure to replace the original old lime kiln.

First. Performance environmental protection

Xinxiang Great Wall lime kiln advantage

Rotary kiln mainly consist of feeding system preheating calcination system, cooling system, finished product storage systems, exhaust gas treatment system,pulverized coal preparation system and air compressor system.

1.activity is higher than the traditional shaft kiln 30ml

The material heated evenly in the revolving lime kiln, the probability of mild and excessive calcination is low. The lime activity degrees produce by lime rotary kiln is higher than the shaft kiln.

02Production capacity reach up to 1500 t/d

The lime kilns produced by Great Wall Machinery have large capacity, the output can reach to 1500t/d, operating well to guarantee enterprise up-scaling and reduce the production cost.

03Gas fuel, energy saving and environmental protection

Great Wall lime kiln belongs to open type calcine equipment, advanced manufacturing technique，lower energy consumption than the old lime kiln calcine system, more environmental protection for adopts the exhaust blast furnace gas.

04Auto-control reduce the labor cost

Auto-control by using DCS remote control system, only need 2-3 operating personnel in the whole line.

05Good quality of finished products, low probability of mild and excessive calcination

Product quality is uniform, the probability of mild and excessive calcination less than 8%.

Active Lime Production Line System
Great Wall Machinery can supply 200-1500t/d active lime production line EPC, the one stop "turnkey" service that provide from scientific reports, design, equipment, construction, installation, commissioning, reach production targets. Welcome customers to call us:+86-371-55019608.
working principle
Qualified limestone particles(20-50mm) be ascended by the hoist and transported into stock bin at the top of the preheater. Stock bin feeding amount be controlled by the up and down two material level meters. Material distributed by tremie pipe to all indoor in preheater. The limestone was heated to about 900℃ by kiln flue gas with temperature in 1150℃ in preheater, about 30% was decomposed and pushed by the hydraulic rod into the rotary kiln. The limestone was decomposed into CaO and CO2 and discharged out of the cooler after cooled to below 100℃ by blowing cold air. The hot air with temperature in 600℃ after the heat exchange enter into the kiln and mixed firing with coal gas.

Annual 200,000-1,000,000 tons Slag grinding plant

GGBS can euivalently replace the cement in concrete and other cement products and obviously improve their comprehensive performance.These years, the high quality vertical roller mill slag powder market in China has become more consummate, its function and value have been widely recognized and used in large buiding project, dams, urban roads, under water projects,coast defence, oil field and chemical anti-corrosion projects etc.

Slag Grinding Station Client's Profit

1.A Slag Grinding plant Station Averagely three years needed to recover cost of investment on new production machines;

2. Applying the latest technology and techniques, production energy consumption significantly reduced;

3. Initial building cost, operation cost and maintenance cost, if costs including civil engineering, electrical control cabinet, then construction investment is only 70% - 80% of that for ball mill

4. Finished cement production is 55~250 t/h if adopting vertical roller millgrinding process, its PC42.5 cement specific surface area is 3300 ~ 3800 cm²/g, achieved high capacity and ultra fine requirements

Vertical mill has some advantages than ball mill in grinding production line

1. Vertical mill construction area is 70% of the tube/ball mill

There is a classifier in vertical roller mill, and it is the hot gas conveying material. The dust gas is directly conveyed into powder collection, so vertical mill has simple system and design, low failure rate, high efficiency operation, compact layout, thus it significantly reduces construction area and space, and help enterprise to save land resources effectively.

2. Low noise, about 20 to 25 decibels than ball mill

There is no direct contact between grinding rollers and grinding table, low noise. The noise control meets requirements of Emission Standard of Environmental Noise Control of Industrial Enterprises "(GB12348-2008). It effectively improves the enterprises’ environmental benefits.

3. Low dust concentration meets the National Standard

Vertical mill is sealed and with negative pressure operation, less dust, clean operation environment. The dust emissions data meets requirements of Air Pollution Emission Standards of Cement Industry (GB4915-2004). Dear Mr. Schlitzerm Morrise,

4. Less metal abrasion of Vertical roller mill, low unit loss

As there is no direct contact between metal in the operation, the vertical roller mill has less metal abrasion, compared with the ball mill, the unit loss is reduced greatly. So in operation process, vertical roller mill has low depreciation speed, low consumption, and can effectively improve the operation time and stability, and that has greatly reduced production cost.

5. PC42.5 specific surface area 3300 ~ 3800 cm2/g

It is convenient for vertical mill to adjust the rotational speed and roller pressure, wind speed through separator, also it can adjust product fineness easily. The qualified product will be separated in time, what avoids excessive grinding problem of tube mill. The product size is even, high homogenization degree, excellent quality.

Another slag production line successfully put into operation!

September 28, by chaeng contracted of the Guangdong Jin Bai of 600,000 tons of slag powder production line project put into operation, and successfully passed the acceptance.

The slag production line host selected chaeng independent research and development manufacturing GRMS46.41 slag vertical mill, the entire production line design is reasonable, high degree of automation, smooth operation.

From the control data that, the slag grinding plant consumption 37 Kw/h, yield 125 tons / h, surface area of 450 m² / kg, the indicators have reached the design goal.

After the project put into operation, Guangdong Jin Bai Li said that the chaeng mill quality and service are very satisfied, and highly praised the chaeng specialization, a high level of project installation team.

Chaeng is committed to creating the industry first-class comprehensive system of grinding service providers brand, adhere to the "customer satisfaction is our eternal pursuit of" business philosophy, devaluation industry "three heart" service, to provide pre-sale, sale, sale Station-wide overall service solutions, and truly allow customers to experience the "choice rest assured that the use of peace of mind, service Shuxin."

200-300 tons per day of lime rotary kiln a complete production line price

As early as the Ming Dynasty, the Chinese people have begun the preparation of lime calcination of limestone, used in construction, and thousands of years ago has a history. Therefore, Chinese people already have a mature lime limestone firing techniques.

First, the most advanced lime kiln -roary kiln

After long years for baking active lime and light burned dolomite production technology continues to progress, from the old shaft kiln to shaft kiln, to the large-scale rotary kiln, lime kiln, active limestone kiln, not only to achieve the Nissan production capacity in 1000 tons, to meet the needs of modern industry, calcined intelligent control technology, to avoid the traditional kiln burnt rate, the high rate of students burned, while greatly reducing energy consumption

Currently, 200-300 TPD lime rotary kiln production line has become the domestic market common lime production project specifications. According to its energizing effect is divided into different gas kiln, coal-fired rotary kiln, rotary kiln fuel mix.

Second, 200-300 tons of lime kiln a complete production line process

Lime rotary kiln a complete production line mainly consists of a vertical preheater lime kiln, vertical cooler composed of lime rotary kiln production line of the a complete process as follows:

Active lime calcining system is composed of a vertical preheater, rotary kiln, vertical cooler composed of material from the preheater at the top of the silo slip through tubing into the cutting body preheater, preheater materials channel provided with low pressure drop within the beam, can effectively reduce the resistance loss of the flue gas, reducing power consumption and exhaust equipment, flue gas after the warm-up through the limestone dust bag filter by the fan into the atmosphere, while the active lime kiln by the incoming the high temperature flue gas material preheated to 900 ℃, so that partial decomposition of limestone, then followed by the hydraulic push rod is pushed into the kiln smoke chamber and then into the tail of the rotary kiln, the rotary kiln calcination and then discharged into the vertical cooler inside, the cold air blown by the fan, the material was cooled to room temperature + 80 ℃ below the discharge cooler, cold air in the cooler is heated while the material through the kiln into the kiln hood, a secondary combustion as fuel air.

Which mainly comprises a transmission gear, supporting roller device, carrier gear wheel supporting device, cylinder, head kiln, kiln tail and seals and other components:

1. the supporting device: Advanced shaft structure, automatic temperature measuring device and provided with electrical heating device.

2. gear wheel supporting device: divided into mechanical and hydraulic thrust gear wheel categories. Hydraulic block device is equipped with advanced hydraulic control system.

3. transmission: with a single drive and dual drive. Speed motors, DC motors or variable frequency motor speed control speed, reliable operation, energy efficient.

4. with plate cylinder wheel: wheel taken off the plate as fixed, adjustable and floating pad, has a simple structure, easy maintenance and replacement, not to hurt the removable cylinder and so on.

5. the sealing device: There are many forms of alternative seal according to different type of kiln design. Clamping cylinder seal, spring-loaded seal, seal weight graphite block, graphite block sealing spring, scale films labyrinth seals, labyrinth seals and axial seal combination of the above forms and now more commonly used flexible sealing, etc., which is characterized by traverse cylinder and swing adaptability, good sealing effect.

Third, 200-300 tons of lime kiln how the selection?

CHAENG ( Great Wall Machinery ) 200t / d lime rotary kiln production line matching is: φ2.8 × 50m lime rotary kiln, supporting coal mill model Φ1.7x2.5m, to obtain satisfactory operating results.

200tpd limestone calcination system supporting the technical parameters of the system
Rotary Kiln	Rotary Kiln Specifications	φ2.8×50m Rotary Kiln
	Production capacity	200T/D
	Main motor power	75KW
	Voltage	380V
	Calcination temperature	1200℃

Fourth, the CHAENG of mechanical rotary kiln production capacity to fight to win the praise of customers around the world

With large-scale lime industry and modernization needs, CHAENG launched a large package lime rotary kiln production line of large-scale, in-line production capacity up to 1500t / d, its main specifications are: Nissan 300 tons of lime kiln, Nissan 200 tons lime kiln, lime kiln, Nissan 600 tons, widely used in metallurgy, iron and steel, chemical, refractory, ceramic, paper industry.

With the ever-increasing ability to innovate, prominent flexible customization capabilities, maturing delivery capabilities to win the trust and support customers around the world, the CHAENG will always first-class products, improve service and sincere cooperation with domestic and foreign merchants, harmony and win-win development of.

slag grinding production lines

As the important equivalent substitutes for cement production,GGBFS can not only significantly improve the overall performance of cement and concrete, but also significantly reduce the production cost. Now it has been widely used in cement plant, grinding station and steel factories as a new kind of high effectively admixtures. For this situation, we may say: "who first invests will first benefits."

CHAENG (Great Wall Machinery) can undertake 20 tons --1.5 million tons of Blast furnace slag/Steel slag/Nickel slag/Manganese slag powder production EPC projects. Up to now, CHAENG has constructed more than 100 slag grinding production lines at home and abroad.

Process Description

The stacked slag is packed and feed by the forklift trucks, then transported by belt conveyor. During transmission, the slag will pass through the iron separator and vibrating screen, then through the weighing equipment and elevator, finally come into the vertical roller mill. With the hot air form cowper stove, the slag after grinding, will come through the separator, while drying. Slag meets the fineness requirement will pass through the separator, then delivered by air blower and elevator, finally come to the storage silo.

Why choose vertical mill for slag grinding ?

Energy-saving, environment friendly, simple process, high intelligence

Nowadays, the slag vertical roller mills are widely accepted by customers, but some customers may still doubt about the vertical roller mill and ball mill. By doing research in more than 10 customers factory, we have summed up these difference between this two kinds of mills.

Vertical mill and ball mill process contrast

Investment return

Slag grinding line investment returns analysis

Take our 600,000 t/a slag power production line as an example, the total investment of this project is RMB 50 million. It took into production on April, 2011. Within 2 years, all the investments has returned and now is benefits. The investment details list as below: