This article introduces the fourth generation grate cooler with central roller crusher replace the third generation grate cooler at the 5 000t/d cement clinker production line. The technical transformation project lasted for 46 days. After more than four years of actual running, the fourth generation grate cooler with central roller crusher was better than expected, included the heat recovery efficiency, clinker temperature, secondary and tertiary air temperature, waste heat power generation and service life of parts. It achieves the double goals of technical progress and profitability.

This paper analyzes the combustion characteristics of inferior coal, introduces the production situation of two production lines with anthracite and lignite as the main fuel, and through the application of high momentum burner to reform,  the combustion rate and combustion impulse of pulverized coal in the burners are designed reasonably, the inferior coal can better meet the needs of clinker calcination.

This paper has introduced the equipment configuration, technological process and engineering application of a semi-final grinding system with cement external circulation. While grinding P·O42.5R cement, the power consumption of cement grinding is 26~27kW·h/t, and the water needed under the cement normal consistency is ~26%. The successful operation of this system provides a new technical system solution for cement grinding field.

A new type of raw material feeding rotor scale is introduced. The rotor scale is composed of pneumatic flow valve and rotor scale, and is equipped with PID. It has the functions of steady flow and metering, and is not affected by the change of raw material level in the raw material bin. The current fluctuation of the bucket elevator entering the kiln is small, the long-term metering accuracy is better than 0.5%, and maintenance free for 5 years.

According to the actual working conditions of the seals, industrialization experiments of laser melting technology have been carried out. The experiments show that the selection of solid-state lasers with a power of 3 000W, medium-carbon high-alloy powder melting materials, and vertical welding beads are suitable for industrial production.

This paper introduces a simple method for estimating the cycle load of roller press system, and analyzes the causes of energy waste caused by material temperature rise under high cycle load. Hyperbolic feeding device can make the roller press system feed inlet circumferential, axial around no pressure relief leakage, cycle load can seek the best balance between high yield and low consumption or switch on demand, accurate control.

In this article the roller lubrication system of ATOX and its working principle was introduced, also attention in the application and maintenance of the roller lubrication system was expounded, the causes of some typical faults of lubrication system was analyzed, as well as the methods for fault of inspection and treatment have been given.

The influence of flue gas after wet desulfurization on the diameter and height of kiln chimney is analyzed by theoretical calculation. Taking a 10,000 ton production line as an example, the suggested values of chimney diameter and height, and the measures to prevent the chimney from corrosion after wet desulphurization are put forward.

The desulfurization environment and mechanism of slag roller mill were analyzed. The desulfurization effect of slag roller mill system was verified through the detection of flue gas volume, flue gas composition and related material composition of slag powder production line in an iron and steel group. The sulfur content of flue gas in slag roller mill system was reduced from 1 183 mg / Nm³ to 35 mg / Nm³.

This paper briefly describes the process flow, material balance and water balance calculation of Daye Jianfeng 5 000 t/d cement desulfurization project, analyzed the influence of chloride ion concentration on desulfurization system, and puts forward the control value of chloride ion content in slurry. After two years of operation, the problem of wastewater discharge is solved while meeting the discharge standard of high sulfur raw materials.

By reforming the structure of internal air in EPIC-F3085 burner, the shape of combustion flame and thermal distribution are optimized. On the basis of not affecting the calcination quality, the low NOx combustion of rotary kiln burner is realized. Compared with before, the ammonia consumption is reduced by 1.82kg/t clinker, and good economic benefits are obtained.

Through 4G wireless network technology, the remote information collection system of stand-alone equipment is built by using two technical modes of "autonomous server" and "hosting server", which can not only realize remote information collection, remote data monitoring and online debugging and maintenance, but also professional experts can professionally evaluate the running status of  equipment through the data information platform.

This article describes the method of using Anybus AB7000 communication gateway in a cement plant. It converts the Elite440 power meter which use RS-485 as the interface Modbus RTU serial communication mode to the Profibus-DP fieldbus communication method supported by the ABB 800xA control system, realizes the remote reading and monitoring of serial interface device parameters.

The article is mainly about various speed regulation technique methods for HV fan. We discuss the advantages, disadvantages and application about HV VSD and internal feedback high frequency chopper wave for the same HV fan motor. HV VSD is better for the situation with wide speed range and good speed regulation, the internal feedback high frequency chopper wave is better for the situation with not wide speed range and normal speed regulation.

This paper mainly describes the application of GPS-RTK in the construction of slope treatment in the field leveling project of cement plant. The GPS-RTK is used to replace the total station for lofting, which improves the construction efficiency and accuracy of slope positioning, and then finely controls the construction quantity and quality of slope construction, reduces the construction cost, and improves the appearance effect of slope construction.

This article introduces the specific operation steps of generatrix method adjusting and connecting the new kiln shells,the new kiln shell and the old kiln shell or the new-and-old kiln shells, as well as the matters needing attention during the construction of connecting and installation.The method is simple and convenient, and it can ensure the quality of the kiln shell connecting effectively.

Based on the design practice of ABMC 10 000t/d clinker cement production line in United Arab Emirates, the author introduces in detail the design of fire protection system of Heavy Fuel Oil (HFO) tank farm by calculation and comparison, including the adoption of codes and standards, the selection of cooling mode, a method of determining cooling water quantity.

This paper introduces the safety management characteristics and practical experience of "the belt and road initiative" cement EPC project, and puts forward the safety management difficulties of "the belt and road initiative" cement EPC project and the safety management measures to ensure the health, life and property safety of overseas personnel.

Aiming at the problem of safety helmet wearing detection on engineering project site, based on the target detection algorithm, this paper proposes a front and rear end separation method to realize the intelligent detection and display of safety helmet wearing. The back-end mainly uses the YOLO V3 algorithm as the core to detect and analyze the live camera video and pictures, and store the violation data into the database. The front-end uses the web development framework to build an intelligent algorithm platform to visually display the illegal data in the database. The algorithm and implementing platform have been applied in the actual project site, and the analysis results show that the YOLO V3  algorithm model has high calculation accuracy and real-time detection speed.

The configuration of TRM53.4 raw material mill is introduced, and the existing problems are analyzed. Through the optimization and upgrading of the separator, cyclone, wind ring and mill seal, the mill output increased by 60 ~ 70t/h, increased by 13% ~ 17%, and the power consumption of the main engine and fan decreased by 1.26kW·h/t, decreased by 8%. The system runs stably and achieves the expected goal, which provides an effective technical scheme for increasing the output and reducing the consumption of the raw mill.

Compared with the production line of the same scale, the 2 500 t/d production line of the company has large system resistance and high energy consumption. In view of this situation, through the optimization and improvement of the tertiary air duct, the inlet of the four and five stage cyclone of the preheater, the optimization and adjustment of the calciner burner and other key links, the resistance and consumption are reduced, with an annual saving of about 1 056 t standard coal and 172×10⁴ kW·h power.

The average power consumption of No.2 cement mill system is 33.80kW·h/ t. the power consumption of cement mill is reduced to 29.02kW·h/ t by improving the extrusion effect of roller press, reducing the fineness of grinding materials, adjusting the grading and loading capacity of grinding body, improving the powder separation efficiency of separator, perfecting the process management of mill, and increasing the output of mill.

After the increase of clinker production, there are some problems in the kiln inlet chamber, such as small cross-sectional area of ventilation, high gas velocity, large resistance and secondary dust of materials entering the kiln. By adopting measures including expanding the volume of the flue gas chamber and adjusting the slope angle, the negative pressure of the flue gas chamber is reduced by 200 Pa, the output of the kiln system is increased by 200 t/d, and the standard coal consumption of clinker burning is reduced by about 0.92 kg / t, the economic and social benefits are remarkable.

The selection of roots blower for coal feeding system at kiln and calciner of the 4 000t/d cement clinker production line of the company is too large, and the noise is high. After replacing with air suspension blower, the power consumption is reduced by more than 30%, and the noise is reduced by about 20%, and the production environment has been significantly improved.