The ZJTL series coal vertical roller mill mill crushes coal through rolling pressure. Its main function is to grind raw coal powder into fine powder suitable for combustion to improve the combustion efficiency and thermal energy utilization of fuel. Then the fine powder will be sent to the rotary kiln burner for full combustion. Coal mills are mainly used in power plants and cement plants. Compared with traditional vertical mills, coal mills are equipped with a unique 3C-II explosion-proof system to prevent the coal powder from exploding due to excessive concentration in the mill chamber. The coal mill separator is responsible for classifying the ground coal powder according to the particle size to ensure that the fineness of the output powder meets the requirements.
One machine, two jobs
A MACHINE YOU CAN DEPEND ON!
Coal vertical mill is specially designed for coal powder grinding. It has high temperature resistant structure and can process coal raw materials efficiently. Its optimized airflow system ensures full combustion of coal powder and is widely used in power and cement industries.
The coal mill can be adjusted according to the characteristics of different coal materials. The equipment can flexibly process various types of coal, including hard coal, soft coal and wet coal, by adjusting parameters such as roller pressure, disc speed and air volume. This high adaptability enables the coal mill to meet the production needs of different coal processing.
The rollers and discs in the coal mill use specially treated high-wear-resistant materials such as high-chromium alloy or hardened steel. These materials have excellent wear resistance, making the rollers and discs less prone to wear during long-term use. The service life of the rollers and discs can reach more than 5,000 hours.
The speed of the coal mill is very high, usually between 150-200 rpm, so that the discs and rollers exert strong grinding pressure on the coal blocks. This design can quickly grind large pieces of coal into fine powder, greatly increasing the production capacity of coal powder production. The coal mill improves the uniformity of the particle size of the coal powder, thereby improving the combustion efficiency.
| Model | Output (t/h) | Fineness (80μm sieve residue) | Moisture | Power (kW) | Motor Power (kW) | Total Equipment Weight (tons) |
| ZJTL1720C | 16-18 | R ≤ 8% | ≤ 0.5% | 250 | 315 | 50 |
| ZJTL2020C | 20-23 | R ≤ 8% | ≤ 0.5% | 355 | 400 | 65 |
| ZJTL2220C | 30-35 | R ≤ 8% | ≤ 0.5% | 500 | 560 | 85 |
| ZJTL2520C | 40-45 | R ≤ 8% | ≤ 0.5% | 710 | 800 | 105 |
| ZJTL2820C | 55-58 | R ≤ 8% | ≤ 0.5% | 900 | 1000 | 130 |
| ZJTL3230C | 75-78 | R ≤ 8% | ≤ 0.5% | 1250 | 1400 | 180 |
| ZJTL3640C | 110-115 | R ≤ 8% | ≤ 0.5% | 1800 | 2000 | 240 |
QUALITY NEVER GOES OUT OF STYLE
The dynamic and static combined separator is more accurate in the classification efficiency and fineness adjustment of coal powder. The design of this separator adopts the static separation principle, combining the dynamic and static separators, with a rotor inside and fixed blades outside. It can achieve a fineness range from 0.08 mm to less than 8% of the screen residue, which is very important for processing various types of coal, especially inferior coal and anthracite. In addition, the surface of the powder selector blades has also been specially treated for wear resistance, and the powder selector blades are designed to be more removable and replaceable, which is convenient for subsequent maintenance.
The fineness of the coal mill separator can be adjusted to 0.08 mm and the screen residue is less than 8%, which meets the processing requirements of various types of coal. This adjustment capability allows the equipment to adjust to the most suitable fineness when processing different types of coal powder. For example, for some high-ash or harder coal types, the fineness can be increased by adjusting the separator parameters to reduce the air volume. The flexible adjustment capability can adapt to the requirements of different production lines. Whether it is cement production or the power industry, the requirements for coal powder fineness can be met.
Tongli vertical coal mill equipment is equipped with a temperature detection device, which can monitor the temperature changes in the mill in real time to prevent safety problems caused by overheating. Secondly, the online gas analyzer CO2 can detect the gas composition in the system in real time to ensure that there is no leakage of harmful gases, and adjust the operating parameters in time to avoid the risk of explosion. The entire system adopts a negative pressure operation mode, which not only effectively reduces dust spillage, but also reduces the risk of explosion and fire.
The air box pulse dust collector equipped with Tongli vertical mill performs well in dust control, and its dust emission concentration meets the national environmental protection standards. The pulse jet cleaning technology of chamber spraying can continuously remove dust accumulation on the filter cloth online, and the dust emission concentration can reach 0.02-0.05 g/m3. At the same time, taking into full consideration the flammable and explosive characteristics of coal powder, 6 to 8 explosion-proof valves are installed on the coal powder dust collector to ensure that there will be no spontaneous combustion due to excessive coal powder concentration.
The coal ball mill is a device that grinds coal blocks into pulverized coal through the impact and grinding action of steel balls on materials. It mainly relies on the continuous collision and friction of steel balls in the cylinder to crush and grind the coal into fine powder. The product fineness of the ball mill is difficult to control, and the particle size distribution of the pulverized coal is not uniform enough, which will produce more coarse powder and fine powder mixed together. In addition, the energy consumption of ball mills is high, and the unit power consumption is usually around 25-30 kWh/t. The steel balls and lining plates are severely worn and need to be replaced regularly, resulting in high maintenance costs.
The vertical coal mill is a high-efficiency equipment that uses the squeezing and shearing effects of the grinding roller and the grinding disc to grind coal into pulverized coal. Compared with ball mills, the energy consumption of vertical coal mills is significantly lower. The unit power consumption is usually 18-22 kWh/t, and the energy saving effect is obvious. The vertical coal mill adopts an advanced dynamic and static combined separator, which can more accurately control the fineness of pulverized coal. It can usually achieve a fineness standard of 80 micron sieve residue below 8%, and the particle size distribution of pulverized coal is more uniform. Good fluidity and higher combustion efficiency. In addition, the grinding rollers and grinding discs of the vertical coal mill have undergone special wear-resistant treatment. The equipment has a long service life, easy maintenance, and short downtime for maintenance. Therefore, it is especially suitable for the power, steel and cement industries where large-scale pulverized coal is produced.
Coal powder produced by vertical mill is widely used in various equipment in many industries such as power, steel, cement, and chemical industry. In the pulverized coal boiler of the power industry, due to the uniform particle size distribution and high fineness of the vertical mill coal powder, the combustion is more complete, which can effectively improve the thermal efficiency of the boiler, reduce carbon emissions and fuel consumption, and is particularly suitable for the combustion of inferior coal and anthracite.
In the cement industry, vertical mill coal powder is used as fuel for cement rotary kilns. The uniform particle size distribution of coal powder ensures the stability and high temperature environment of combustion in the rotary kiln, thereby improving the quality and output of clinker and reducing heat energy loss. The blast furnace pulverized coal injection system in the steel industry also relies on the coal powder produced by the vertical mill. The uniform fineness of the coal powder ensures the completeness of combustion, reduces the use of coke, and reduces the cost and energy consumption in the steel production process.
In the lime production line, vertical mill coal powder is used as fuel for the lime rotary kiln. Full combustion and efficient heat energy utilization ensure the calcination quality of lime. In addition, industrial boilers in the chemical and metallurgical industries also widely use coal powder produced by vertical mills. The uniform particle size ensures the combustion stability and thermal efficiency of the boilers, ensuring the continuous industrial production.
In building materials and other industrial equipment, the coal powder injection system relies on coal powder ground by vertical mills to achieve efficient combustion and meet the heat demand in the production process.
Designed for blast furnace slag grinding, widely used in cement production
Primarily used in steel production, coking coal has strong caking properties. Its unique characteristics make it suitable for specific vertical mill applications where high-temperature processes are needed.
Also known as thermal coal, steam coal is primarily used for electricity generation. Its characteristics make it suitable for vertical mills designed for power plant operations.
This type of coal produces minimal smoke during combustion, making it ideal for environmentally conscious applications. It’s suitable for vertical mills used in residential heating and industrial processes.
Lignite is the lowest rank of coal, characterized by its high moisture content. It is often used in power plants and is well-suited for vertical mills due to its low sulfur emissions.
These are small particles generated during coal processing. They can be efficiently processed in vertical mills, providing a cost-effective way to utilize byproducts in energy production.
Sub-bituminous coal has a lower carbon content and higher moisture levels, which make it suitable for applications where lower energy output is acceptable, such as in power generation.
Known for its high carbon and low volatile matter content, anthracite provides superior heating value and is effective in industrial processes requiring high temperatures.
This type of coal is high in carbon content, making it ideal for high-energy applications. Its moderate volatility allows for efficient burning in vertical mills.
What is Cement Production Lines: From Raw Material to Finished Product
A cement production line automates the manufacturing of cement, from raw material processing to packaging.
August 22, 2024
You can get in touch with us through the following contact information
AddressNo. 2289 Huancheng South Road, Tongxiang, Jiaxing, Zhejiang Province, China. Zip code:314500
Please fill in the sales inquiry form and our sales representatives will be in touch shortly.
