In view of the problems in the construction of cement engineering EPC projects, such as high labor intensity, low work efficiency, and difficult control of rebar consumption rate in traditional rebar processing methods, a intelligent rebar processing method is proposed, which combines CNC rebar processing equipment with cloud scheduling system through IOT technology. This method realizes centralized monitoring of the status of rebar processing equipment and remote task dispatching, greatly reduces the manual intervention in the process of rebar processing, improves the production efficiency and quality control level of rebar processing, reduces the waste of rebar, and promotes the overall intelligent level of steel bar processing.

Based on the standardized management of safety production in cement engineering projects, various types of intelligent terminal devices are integrated to establish a safety management information platform for cement engineering project construction. This platform includes the construction of an intelligent monitoring system, addressing technical deficiencies in traditional management approaches. The paper introduces the specific content of digital safety management, such as on-site personnel management, dynamic warning of hazardous areas, identification and rectification of hidden dangers, management of vehicles and machinery, intelligent control system for tower crane operations, intelligent recognition and alerting of abnormal events. The application of these digital safety management measures at the cement engineering project site has effectively elevated the level of safety management in construction, achieving digitization, refinement, and intelligence in the safety management of cement engineering project construction.

The article introduces the platform architecture and network architecture of a large-scale cement group enterprise's production information platform, as well as the application of data standardization, report automation, and functional mobility. The focus was on introducing the system functions of the regional information platform, including regional overview, visualization screen, real-time monitoring, regional reports, APP service, and government platform data services. By establishing a production information platform, the intelligent production process of the cement group enterprise has been achieved, improving production efficiency, reducing operating costs, expanding sales channels, enhancing market competitiveness, and enhancing the enterprise's decision-making ability.

The cement industry widely uses roller presses as pre-crushing equipment for grinding systems, and the efficient work of the roller press has become a focus of industry attention. By analyzing the impact of the roller press's feeding valve and roller surface, the gap between side baffles, the roller gap, the working pressure of the roller press, the intermediate silo and feeding chute, V-shaped powder separator and clinker particle size on the work of roller press, optimization and improvement measures are proposed to ensure the stable operation of the roller press's material bed extrusion, maintain the work current at 90%±5% of the rated current and improve the power efficiency of the roller press.

The heat transfer mechanism between cement clinker and air in a grate cooler was studied, and based on the actual operating parameters of a 5 000t/d cement clinker production line in China, the heat transfer process inside the grate cooler was numerically simulated using porous media theory. A physical and mathematical model of the grate cooler was established, and the temperature field, pressure distribution, and flow field distribution inside the grate cooler were numerically simulated using Fluent fluid calculation software. The relationship between the temperature of the middle air intake of the grate cooler and the thickness of the clinker layer was analyzed in detail. Based on the simulation analysis results, the positions of each air intake of the grate cooler and the distribution of air volume were reasonably arranged.

The section of cone-shaped nozzle air flow measurement device for clinker cooling fan is small for an oversea cement project, resulting in the unstable operation of PID loop for the cooling fan air volume, in order to meet the PID operation requirements and improve the sensitivity of the measurement device, the cone-shaped nozzle flow measurement device of cooling fan has been modified. This paper introduces the modification method and installation requirements of the cone-shaped nozzle flow measurement device, and the calculation method of the flow coefficient and the field calibration result. The differential pressure value reaches 373Pa after modification when the design air volume is 29 965 m3/h. The static pressure of the pipeline system is increased by 248Pa, and the sensitivity of the flow measurement device is improved, ensuring the stable and automatic adjustment of the PID loop.

In response to the problems of poor sealing effect and small capacity of the though-plate conveying hopper, insufficient conveying capacity, poor on-site operating environment, and high labor intensity of personnel in the trough zipper machine of a certain cement clinker production line, a new cement clinker trough zipper machine has been renovated and replaced, using an independent conveying hopper and a larger reducer, adding lubrication devices, and replacing the manual spiral flat gate valve with a pneumatic flat gate valve. After the renovation, it improved the conveying capacity of the zipper machine, reduced the standard coal consumption of clinker from 105.24kgce/t to 103.59kgce/t， reduced the dust, optimized the on-site working environment, and increased social and economic benefits.

Based on the process characteristics and control requirements of a wet desulfurization system for a 6 000t/d cement clinker production line, this paper introduces the application of Siemens DCS system in the cement kiln desulfurization system, and the method how to use this DCS system to achieve fully automatic control operation of the flue system, absorption tower system, limestone slurry preparation system, gypsum dewatering system, and accident slurry system. Since its operation, the desulfurization system of this production line has achieved a flue gas SO₂ emission concentration of <15mg/Nm³, meeting the national A-level emission limit standard.

The material balance management of cement enterprises often adopts the traditional method of manual periodic inventory, which has a long inventory cycle and high labor intensity. The inventory data is greatly affected by the type of materials and stacking location. The online material balance management system for cement enterprises is based on the theory of cement technology, driven by information and data. It fully utilizes information and digital technology to collect multi-dimensional data on cement production, quality, logistics, and other aspects, and calculates balanced material consumption from forward and reverse logic. It can achieve daily scheduled inventory of materials and output inventory reports, assist production decision-making, and improve the efficiency of enterprise production management.

The content of free calcium oxide (f-CaO) in clinker is an important index for cement quality control. As this index cannot be realized in real-time detection online at present, it is difficult to establish effective closed-loop control of cement kiln system. Based on the conventional control scheme, a method is proposed to detect the raw materials of cement kiln components in real time based on neutron activation analysis, and then use neural network algorithm to build a soft measurement model of free calcium oxide. The TaiJi-MPC software is used to realize the method of edge control of gas, coal and meal in cement kiln system. This method can reduce the standard deviation fluctuation of f-CaO by about 10%, increase the content of f-CaO by more than 0.3%, and significantly improve economic and social benefits.

It studies the domestic and foreign standards for seismic design, and analyzes the seismic design for the electrical equipment, such as the pipes, busbar and cable tray in the cement project. It introduces some points for attention in seismic bracing using， makes the seismic bracing family model with revit software to meet the seismic fortification requirements of cement engineering EPC project.

The control requirements of water-soluble chromium (VI) content in cement at home and abroad and the current methods and measures to reduce the content of water-soluble chromium (VI) in clinker and cement are reviewed. The research and application cases of reducing water-soluble chromium (VI) in cement industry are discussed from the aspects of common chromium reducing agents, industrial waste chromium reducing agents, raw materials, process control, etc. ， and it is pointed out that there are still deficiencies in the current research on chromium reduction in the cement industry. It is suggested that further research should be carried out on the systematic mechanism of chromium reduction of industrial solid waste, the optimization of cement kiln collaborative disposal of solid and dangerous waste technology, and the development of new high-efficiency and low-cost chromium reduction agent products.

The properties of magnesium phosphate cement and the crystal morphology of hydration products under different boric acid dosages were tested and analyzed experimentally, and the effect of boric acid dosage on magnesium phosphate cement was discussed. The experimental results showed that the fluidity of magnesium phosphate cement was not significantly improved after boric acid was added. The coagulation time increased significantly, but the coagulation time did not continuously increase with the increase of boric acid content, and the boric acid content of 4% was the optimal dosage. The flexural strength and compressive strength decreased significantly in the early stage, and the strength changed little in the later stage. At the same time, the addition of boric acid inhibited the crystallization of potassium struvite in cement, and with the increase of boric acid content, the content of potassium strudite decreased and changed from uneven prismatic to sharp cone.

This paper outlines the research and development process, as well as the production practice of a specialized cement. Despite the less-than-ideal quality of high-silica, low-calcium limestone sourced from our own mines, significant improvements were made through the meticulous selection of raw and fuel materials, refining the raw meal formulation, enhancing the quality control of cement clinker, and improving the operation of calcination control. These efforts led to the development and production of a new type of cement clinker with approximately 0.2% alkali content and a silica ratio of about 3.50. This low-alkali, high-silica, and high sulfate-resistant cement clinker fulfills the construction requirements for environments prone to sulfate erosion, freeze-thaw cycles, and alternating dry-wet conditions, such as harbors, water conservancy projects, and underground engineering.

The common determination method of sulfur content in the collaborative disposal of hazardous waste distillation residue in cement kilns has some problems, such as complicated operation, low sensitivity, high test conditions, and serious environmental pollution. The method of “oxygen bomb combustion-ion chromatography” is used to determine the sulfur content in the distillation residue, which overcomes the deficiency of the conventional detection method and improves the accuracy and reproducibility of the detection results. The sulfur content analysis and detection experiment showed that under the oxygen bomb combustion pressure of 3.0MPa, the absorption liquid is 0.5mol/L NaOH solution, the action time of the absorption liquid is 20min, and the mobile phase flow rate of 100mL/min, the mass concentration of sulfate showed a good linear relationship in the range of 0.5~50mg/L, the correlation coefficient >0.999, the average recovery of spiking (adding standard solution) was 96.8%.