Tongli medium-speed mill is a coal grinding equipment specially used for coal powder preparation, mainly used for coal powder production in the power, metallurgy and chemical industries. The medium-speed mill is called a medium-speed mill because its working speed is between the low-speed mill and the high-speed mill, with a rotation speed of 60-325rpm. In the working state, the grinding roller exerts pressure on the material on the grinding disc, and grinds the raw coal into fine coal powder by extrusion and shearing. The grinding roller rolls on the fixed grinding disc, crushes the raw coal into powder, and then separates the qualified coal powder through the built-in separator and transports it to the boiler or other equipment, while the coarser particles are returned for further grinding. It has the advantages of high efficiency, energy saving, compact structure and simple maintenance, and is widely used in the fuel preparation of coal-fired boilers and industrial boilers.
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The coal mill is designed for coal powder grinding, has high temperature resistant structural characteristics, and can efficiently process coal raw materials. Its optimized airflow system ensures that the coal powder is fully burned and is widely used in the power and cement industries.
The medium-speed coal mill has excellent low-speed start-up characteristics. The usual start-up speed is between 30-50 rpm, which avoids the impact load on the motor. Compared with the starting current peak of high-speed mills, medium-speed mills can reduce the starting current by 20%-30%, thus improving the starting stability of the equipment. It is especially suitable for operating environments with frequent starts and stops, effectively reducing equipment wear and failure risks.
The medium-speed coal mill is equipped with a hot air system, which can complete grinding and drying operations at the same time when processing raw coal with a moisture content of 15%-20%. The hot air temperature is generally controlled between 75-95 degrees Celsius, which can reduce the moisture content of raw coal to less than 1%. This built-in drying function significantly improves the processing efficiency of high-moisture coal, reduces additional drying steps, and improves overall production efficiency by more than 20%.
The medium-speed coal mill has dynamic adjustment capabilities. It can adjust the air volume and mill load within the range of 50-120 according to the Hastelloy Grindability Index (HGI) of the coal type to ensure optimal grinding of different coal types. Coal effect. Through the intelligent adjustment system, the fineness of pulverized coal can be controlled within the range of 0.08 mm sieve residue less than 8%, maximizing coal grinding efficiency and reducing energy consumption. The energy saving effect can reach 15% under different load conditions. %-20%.
Model | Capacity (t/h) | Grinding Table Diameter (mm) | Motor Power (kW) | Primary Air Volume (kg/s) | Resistance (including separator) (Pa) |
ZJTL160 | 46.82 | 1600 | 280 | 14.31 | 6400 |
ZJTL170 | 54.57 | 1700 | 355 | 16.38 | 6614 |
ZJTL180 | 62.07 | 1800 | 450 | 18.8 | 6812 |
ZJTL190 | 71.49 | 1900 | 450 | 21.56 | 7031 |
ZJTL200 | 80.66 | 2000 | 500 | 24.06 | 7230 |
ZJTL212 | 94.67 | 2120 | 560 | 27.9 | 7456 |
ZJTL225 | 108.89 | 2250 | 630 | 31.69 | 7705 |
ZJTL235 | 121.21 | 2350 | 710 | 35.65 | 7904 |
ZJTL245 | 135.31 | 2450 | 800 | 39.19 | 8084 |
ZJTL255 | 147.61 | 2550 | 900 | 43.27 | 8262 |
ZJTL265 | 163.02 | 2650 | 1000 | 47.4 | 8428 |
QUALITY NEVER GOES OUT OF STYLE
By optimizing the design and upgrading the grinding roller system, the ZJTL medium-speed coal mill has increased its output by 20%-50% compared to the old MPS mill. This improvement is due to its higher grinding efficiency and better material distribution. At the same time, the power consumption of medium-speed mills is greatly reduced, usually 15%-20% less than traditional coal mills, thereby improving overall production efficiency and saving operating costs.
The ZJTL medium-speed coal mill adopts a lightweight design, which significantly reduces the design weight of the basic block. At the same time, it can use ordinary rigid foundations to replace the previous elastic foundations. This simplified design greatly reduces the complexity and cost of infrastructure construction and reduces infrastructure investment.
The medium-speed coal mill is equipped with a roller turning device, which makes maintenance work more convenient. Maintenance personnel can quickly perform maintenance and replacement by turning out the rollers, reducing the complicated disassembly procedures. This design not only reduces labor intensity, but also shortens maintenance time, usually 30%-40% shorter than the maintenance time of traditional equipment.
The output of medium-speed coal mill can be adjusted arbitrarily within the load range of 15%-100%. This flexible adjustment capability enables the equipment to respond quickly according to the actual needs and load changes of the boiler, so as to better adapt to production needs and ensure the stability and efficiency of operation.
Tongli medium-speed coal mill is equipped with an advanced control system that can quickly respond to changes in boiler load and adjust output to meet the peak load regulation needs of the power grid. The system can monitor the operating parameters of the coal mill in real time and make dynamic adjustments to ensure that the boiler maintains stable operation when the power grid load changes, thereby improving the peak load regulation capacity of the power plant.
The new ZJTL medium-speed coal mill has a lower design height and a small footprint, which is convenient for flexible arrangement in the boiler plant. Due to the reduction in floor space, the plant layout is more compact, which greatly reduces the total infrastructure investment. Owners can save costs by reducing the plant construction area while improving the overall utilization of equipment.
A byproduct of oil refining, petroleum coke is used as a carbon source in aluminum and steel industries. Its high energy content makes it suitable for vertical milling.
These biomass pellets are used as a renewable energy source. They require fine grinding to improve combustion efficiency in energy generation.
A byproduct of coal combustion in power plants, fly ash is used as a pozzolanic material in concrete. Its fine particles enhance the properties of concrete when ground properly.
Generated from steelmaking processes, slag can be ground into a fine powder and used as a supplementary cementing material, enhancing concrete performance.
Also known as brown coal, lignite has a lower energy content. It’s used primarily in electricity generation and benefits from the vertical mill's grinding efficiency.
With the highest carbon content of all coals, anthracite offers high energy output and low smoke emissions. It’s suitable for industrial heating and residential use.
This type of coal has high carbon content, making it ideal for electricity generation and metallurgical processes. Its grinding characteristics allow efficient pulverization.
This fine residue from metallurgical coke production is used in the sintering process for iron ore. Its fine particle size allows for efficient grinding and handling.
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