This paper introduces the final grinding system and operation of the cement roller press. Compared with the cement produced by the combined grinding system of the roller press and the concrete prepared, the power consumption of the final grinding system of the cement roller press is greatly reduced, and the performance of the concrete prepared by the two kinds of cement is equivalent.

The properties and research progress of metals, rubber and composite materials used for the liner board of ball mills were introduced. Wear-resistant cast iron is featured with good corrosion resistance and oxidation resistance, martensitic steel with good comprehensive mechanical properties under moderate impact wear, and bainitic steel with good hardenability; martensitic/bainitic steel can improve ductility and impact tenacity of materials while maintaining high strength, and high manganese steel shows high impact performance and abrasive resistance. Rubber lining is light in weight, easy for installation, and low in noise and power consumption, but it is not suitable for dry type ball mills, while composite materials show the satisfactory designability and good comprehensive performance. Finally, the failure modes of lining were summarized, notably, abrasive wear is not only related to the hardness of materials, but also to the ratio of the hardness of the abrasive to the hardness of materials.

Laser cladding technology has been widely used in Metal 3D printing technology, the most typical of which is the aeroengine blade using 3D printing technology once forming. The application of laser cladding technology in the fourth generation of cooling machine can achieve the dimensional accuracy that the traditional casting process can not achieve, strengthen the rapid repair and reuse of heat-resistant steel workpiece and workpiece, and greatly improve the service life of workpiece.

This paper introduces the structure, technical parameters and working principle of LM type vertical roller mill, as well as the technological process of gypsum grinding production line, analyzes the factors affecting the stable operation of the vertical roller mill, summarizes the operation experience. The mill capacity is stable at 50~55t/h, the power consumption of the main machine is 7~8kWh/t, the power consumption of the system is less than 15kWh/t, 30% lower than that of the ordinary powder mill.

The causes of errors were analyzed when the outer diameter of gears and cushion plate for rotary kiln were measured to use π ruler in directly, and the control and verification methods for eliminating measurement errors were proposed. The results showed that the errors were bigger which were measured directly for the outer diameter of the shim plate and the diameter of the pinion tooth top circle using π ruler, and the measured values were less than the actual size. The measurement errors must be considered when the π ruler was used to measure directly the outer diameter of the pad plate and the diameter of the pinion tip circle compensation. The measurement errors compensation value could be calculated according to relevant theoretical dimensions, and the corresponding operation verification should be performed.

This paper introduces the application goal and implementation process of ceramic abrasive in ?4.2m × 13m cement mill. Compared with the production data of metal abrasive, when the output is 210t/d, the power consumption of the system is 25.1kWh/t, and the cement temperature is reduced by nearly 20 ℃.

Based on the variable frequency direct drive motor, the influence of different speed of grinding wheel on the output of grinding wheel is studied. The test results show that the adjustment of grinding wheel speed has a great help to the output improvement and energy consumption reduction of cement plant.

This paper introduces a configuration of Uninterruptible Power Supply (UPS) system based on lithium battery, which can replace the UPS system based on lead-acid battery in mostly current cement plant applications. The system is mainly composed of lithium battery pack, battery management system and UPS host. The life of lithium battery pack is more than 4 times that of lead-acid battery. With nominal energy of 5.76kWh, lithium battery can satisfy the requirement of 6 kVA UPS for continuously one-hour operation.

Resources, energy and environment issues have become a hot topic in the world. With regard to CO₂ emissions reduction, the international community had met several times to respond positively to the reduction of greenhouse gases. Japan is a highly developed industrialized country and is actively developing clean new energy sources.This article based on domestic and foreign information materials, introduces the current situation of CO₂ emission reduction, hydrogen energy automobile, new energy society and the application of CO₂ resource research, etc., for readers' reference.

In order to further improve the calculation of the carbon emissions of building materials, the CO₂ emissions were statistically studied from the perspective of the entire life cycle of the building. The life cycle of the building materials was divided into four stages: production, transportation, maintenance, and dismantling. Perform auxiliary statistics to calculate the CO₂  emissions of the whole life cycle of building materials. The feasibility of BIM in the calculation of carbon emissions of building materials was verified in combination with actual engineering cases of building design, and measures to reduce carbon emissions of building materials were proposed to provide a reference for further development of low-carbon building design.

This paper introduces the source of nitrogen oxide, the reaction mechanism and process flow of SCR denitrification, the sulfur and water poisoning mechanism of catalyst, and focuses on the research and attempts made in the academic and industrial circles at home and abroad to improve the sulfur and water resistance of catalyst, in order to promote the progress of low temperature SCR technology and promote its early industrial application.

It analyzed the cause and source of deep hole dust in before,during and after blasting.Through some tests, it found that applied several methods, such as pre-wetting blasting area, water deck charge, stemming by crushed stone, parameters optimization and so on, the dust of deep-hole blasting in one limestone quarry was effectively constrained, and local government requirements for the new big international airport navigation safety was met.

The intelligent and efficient denitration system of HeSNCR is introduced. The system arranges spray nozzles on the calciner in layers where each layer has corresponding automatic control valves, and uses artificial intelligence software to track changes in kiln conditions in time. By analyzing various operating parameters of the cement kiln system, it accurately determines the amount of ammonia required and accurately controls each group of sprays. The spray nozzle sprays the most appropriate amount of ammonia at the most suitable injection point to achieve the highest denitration efficiency. This system can also effectively control ammonia escape while reaching the maximum NOx reduction rate. Since March 2019, the system has been operating stably, and the NOx emissions have been successfully controlled at 100mg/Nm³ and 50mg/Nm³ .

This paper introduces the construction background, construction conditions, route layout and main technical scheme of the storage and transportation project of Huzhou South Logistics Co., Ltd., which is the green environmental protection project with the longest distance of transporting clinker by long-distance off-road curve belt conveyor system in China. Electric drive transportation is used instead of automobile transportation, with a daily transportation capacity of 45 000~50 000 tons. Closed corridor transportation with many advantages such as low dust emission, noise less than 50dB, daily average reduction of 3 000 vehicle transportation, annual saving more than 2 000 tons of oil, reducing exhaust emissions, easing traffic congestion along the line, achievies good economic and social benefits.

The total cement output of the United States in 2018 was approximately 88.5 million tons, and 70% of domestic cement consumption was in the field of ready-mixed concrete. Foreign-owned cement plants account for about 80% of US cement plants. 50% of total cement output is concentrated in Texas, California, Missouri, Florida, and Alabama. Most of the cement plants in United States are relatively low production scale with old appearance. Alternative fuel is widely used. Cement product is mainly delivered in the form of train bulk loading.

Considering the unsatisfactory conditions of our existing grate cooler, i.e. the poor failure resistance, unstable operation, inconvenience for on-site inspection, slow troubleshooting, low stability of clinker layer control and high leak volume, some improvements were made, including changing the 6-row grate bed to 9-row grate bed, adopting the touch screen at the site and the double display in the central control room, developing the clinker bed temperature detection system to control the clinker layers, adding hydraulic oil flow pressure self-correction and feed forward control, optimizing algorithms and adopting the automatic adjustment to the pressure system settings. After the improvements, the operation reliability of the grate cooler is significantly improved, the secondary air temperature increases from 1 050℃ to 1 152℃, the average temperature of clinkers out of the grate cooler is about 85℃, and the power consumption for clinker production decreases to 60kWh/t. 

The reasons for the low operation rate and frequent failures of the bulk conveying system in the power plant are analyzed. In 2018, the bulk conveying system was optimized, and the equipment structure was improved. After the technical transformation, the system's operating rate increased to 90%, which greatly saved the equipment maintenance costs and improved the operating environment, achieving the expected effect of technical transformation.This method is also applicable to the transformation of old chain conveyor in cement factory.

The effect of ATOX50 raw meal roller mill roller seal fan is expounded. The main reasons for the low seal pressure of the grinding roller are analyzed. The treatment and prevention measures of low seal pressure of grinding roller are put forward. After the implementation of the technical improvement measures, the sealing pressure of the grinding roller is stable at 2.8~3.2 kPa, and it obtained the ideal production effect.

To deal with the problem that cement storage caking often blocks discharge chute, it is decided to install air cannon at the chute. Outlet of the air cannon is slightly raised so that compressed air can easily hit the caking. The effect is significant after actual utilization, not only improving the production environment, but also reducing the labor intensity of the staff.