A Survey and Analysis on Electricity Consumption of Raw Material Mill System in China Cement Industry between 2014 and 2019
Abstract
:1. Introduction
- The first is the expanded improvement of the traditional grinding system and the combined use of high-efficiency vertical mills, roller presses, and other types which makes that the high yield and low consumption of the raw material preparation process have reached a considerable level in many cement plants. As for different special materials, it has a wide range of adaptability.
- The second is the application of new equipment and new technology, making the raw material mill system abundant and perfect. The integration of ball mill drying and grinding, promotion of a vertical mill, which is equipped with a new type of powder separator and suitable for high moisture content, and the utilization of pre-decomposition waste gas as a drying heat source for suspension preheater kiln, etc., have promoted the development of raw material preparation technology.
- The third is the gradual advancement of the intelligent operation and control process. The overall automation in China cement production has been much advanced. The automatic control of the mill operating system, the analysis and detection of raw material, and batching and metering have been popularized. At this stage, the main focus is on the development from general automatic control to the application of artificial intelligence to carry out professional diagnosis, and cloud computing, etc., combing with analog computing to optimize production and realize intelligent control.
- The fourth is the shift from simple emissions-reducing to comprehensive attention to the compatibility with the ecological environment, and the treatment and utilization of waste gas and other wastes to improve the environment.
- The fifth is that the raw material grinding equipment continues to be large-scale, and that the single-machine capacity continues to increase to meet the large-scale demand for cement production. At the same time, the focus is on improving the reliability and utilization of equipment and reducing material inventory as much as possible.
2. Operating Status of Raw Material Mill System in China Cement Industry
3. Three Types of Mill Raw Material Preparation System
3.1. Middle Unloading Drying Tube Mill Raw Material Preparation System
3.2. Vertical Mill Raw Material Final Mill System
3.3. Roller Press Raw Material Final Mill System
4. Comparison of Three Types of Raw Material Mill Systems and Analysis of the Factors Affecting Operation
4.1. Comparison of Technical Indicators of Three Raw Material Mill Systems
4.2. Selection Principle of Different Raw Material Mill Systems
4.3. Analysis of the Factors Affecting Electricity Consumption of Raw Mill System
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
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Country | Mill Type and Specifications | Installed Power (kW) | Output (t/h) | Electricity Consumption * (kWh/t) | |
---|---|---|---|---|---|
China | Middle unloading drying tube mill Φ4.6 m × (10 + 3.5)m | 2 × 3550 | 380–480 | 20–24 | |
External circulation vertical mill | TRM53.4 | 4000 | 410–440 | 15–17 | |
TRM56.4 | 4000–5500 | 460–590 | 13–15 | ||
HRM480 | 3800 | 380–450 | 13–17 | ||
Roller Press | HFCG200-180 | 2 × 2000 | 520 | 12–17 | |
TRP(R)220-160 | 2 × 1800 | 470–510 | 12–13 | ||
CLF180120-D-SD | 2 × 1250 | 260 | 14–22 | ||
Denmark | Vertical mill | ATOX50 | 3800 | 380 | 17–20 |
Germany | Vertical mill | LM48.4 | 2700 | 320 | 22 |
RMR57/28/555 | 4200 | 430–450 | 17 |
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Meng, R.; Zhao, Q.; Wu, M.; Long, Q.; Zhou, M. A Survey and Analysis on Electricity Consumption of Raw Material Mill System in China Cement Industry between 2014 and 2019. Sustainability 2021, 13, 1126. https://doi.org/10.3390/su13031126
Meng R, Zhao Q, Wu M, Long Q, Zhou M. A Survey and Analysis on Electricity Consumption of Raw Material Mill System in China Cement Industry between 2014 and 2019. Sustainability. 2021; 13(3):1126. https://doi.org/10.3390/su13031126
Chicago/Turabian StyleMeng, Ruonan, Qinglin Zhao, Miaomiao Wu, Quanming Long, and Mingkai Zhou. 2021. "A Survey and Analysis on Electricity Consumption of Raw Material Mill System in China Cement Industry between 2014 and 2019" Sustainability 13, no. 3: 1126. https://doi.org/10.3390/su13031126