The 4th generation clinker cooler with middle roller crusher has many advantages, such as high heat recovery efficiency, excellent cooling effect, low power consumption and high generating capacity, etc. This advanced equipment has been widely used in the new or modified clinker production line. This article comprehensively introduced the design details of technical transformation process from the 3rd generation cooler to the 4th generation cooler, including selection principle of the first part and second elevation of the cooler, the arrangement of cooling fans and hydraulic station, connection of the hot air duct, installation of the device used to eliminate clinker block, maintenance plan of the roller crusher, and transformation of trough conveyer and related chutes.

The basic situation and structure of the 3rd generation TC grate cooler and the 4th generation Sinowalk grate cooler are introduced. After upgrading to the 4th generation grate cooler, the position of air cannon, grate plate travel, operation mode, coal quality and raw material ratio have been adjusted, so that the performance of the Sinowalk grate cooler has been fully brought into play. The clinker granulation is more uniform, the clinker temperature of the grate cooler is between 80℃ and 130℃, the heat recovery efficiency has been significantly improved, as well as the temperature of the secondary air has been raised to more than 1 200℃ and the tertiary air raised to about 900℃.

In terms of the cement production line at present, it has a wide variety of equipment and many high-precision and cutting-edge equipment. The equipment condition detection center has been established by considering the strength of equipment management, the innovation of equipment management and maintenance system, etc. Through the use of various new instruments and technical means to collect the parameters such as equipment vibration, internal defects, lubrication and so on, it carries out the analysis on equipment health status and deterioration trend, and formulates targeted maintenance plan, so as to ensure the safe, stable and efficient operation of the equipment.

Combining the actual situation of the cement and concrete industries and the development status of technical standards in developed countries, such as Europe and the United States, several practical methods for carbon emission reduction have been proposed in cement community. For example, using cement scientifically and efficiently, adjusting the structure of cement products, strengthening the top-level design, improving the carbon emission accountability methods and sharing various responsibilities of producers and consumers.

Causes of low heat recovery efficiency, high,clinker temperature and high failure rate of equipment were analyzed for Bar Grate Cooler. On the basis of making full use of the original equipment shell, fans and equipment, the Bar Grate Cooler was transformed into stepping grate cooler, and the tail hammer crusher into roller crusher, reduced the transmission power. The heat recovery efficiency of grate cooler was increased from 71% to more than 75% after the renovation, which saved the renovation cost and achieved the goal of energy saving and consumption reduction.

In order to improve the output of the cement combined grinding system of the ?4.2m×13.5m ball mill and reduce the power consumption of the system,  technical measures were carried out including transforming the cement mill separator, increasing the filtering area of the dust collection system, adding the three-classified separation of the roller press system, adjusting the system process flow and so on. The goals were achieved. The average output of the cement grinding system was increased by 18.83t/h, and the process power consumption was reduced by 4.47kW·h/t.

Taking the GDNF company's actual production process as an example, the capacity could not be improved, the maintenance cost was higher and the maintenance time was longer. To solve these problems, it introduces TPM (Total Productivity Management) in the practice of management theory during the five work process including the work direction defining, organizational security, status investigation, cause analysis and implementation of the improvement. It focuses on the application of TPM management tools for 5Why analysis, correlation analysis and 4M analysis. Promoting TPM management method in cement enterprises can effectively improve enterprise management level, promote enterprise production and operation indicators, and reduce the loss caused by equipment failure.

It introduced the source of MgO in the cement raw material of limestone. Through mathematical statistics, physical and chemical analysis, and XRD micro-cause analysis, the effects of high MgO content raw materials on cement clinker strength, clinker grinding, clinker color and other properties are studied, and the direction of technological improvement is clarified. In actual production, when the content of MgO in the raw material increases, by adjusting the batching scheme, appropriately increasing the KH and SM control values, increasing the total content of C₃S and C₂S, and using high-calorific value fuels, the strength and quality of the clinker can be stabilized.

The process links of running, emitting, dripping and leakage in cement production enterprises are analyzed, and the examples of treating, running, emitting, dripping and leakage are introduced. By establishing a strict system of daily equipment maintenance , changing the extensive equipment management mode, improving the working environment and realizing the goal of clean and green production.

Based on the existing delivery system, the delivery process and the operation and layout of loading equipment are optimized and upgraded by using digital technology, so as to realize the unattended delivery site. Since the system was put into operation, the delivery efficiency and measurement accuracy have been improved, and the labor intensity of workers has been reduced.

Cement enterprises purchase raw fuel materials with multiple orders and producing areas for the same material, resulting in different unit prices and freight costs. Cement sales also exist the same problem; because of different sales regions or customers, so cement factory unit price is different. Through the construction of transport vehicle logistics monitoring information system, it can track and record the data of goods origin, vehicle track, unloading place and load, etc., and improve the supervision efficiency of cement enterprises on logistics transportation by using information technology.

A cement production line project in Africa, located in the expansive soil area, the foundations of several workshops appeared serious settlement or uplift due to construction during rainy season. After analysis of the causes and comparison of several schemes, the grouting method is decided to be adopted for foundation reinforcement.  The advantage of grouting treatment is simple and easy to construct, short construction period, low cost and obvious reinforcement effect. After grouting treatment, foundation is safe and stable.

By comparison, the design scheme of combining mining pit management with road construction of mining transportation based on filling is determined. When the mining road passes through the mining pit, it is a high fill section. The high fill not only lowers the height of the mining pit slope, but also increases the stability of the mining pit slope. In the completion of road construction, it at the same time controls the pit, restores the ecological environment, beautifies the landscape, and saves the cost of pit management.

Increasingly, the landfill or open-air storage of waste concrete produced in the process of urban demolition and reconstruction will occupy a large amount of land resources and pollute the environment. Therefore, the recycling of waste concrete is the main measure to solve this problem. Through experiments, different proportions of recycled waste concrete coarse aggregates are used to replace natural limestone aggregates to prepare C40 concrete, so as to obtain the influence of different recycled coarse aggregate replacement rates on the working performance, mechanical properties and durability of C40 concrete. The results show that the replacement rate of recycled coarse aggregate is 40%, and the highest is not more than 60%.