Introduction to Cement Rotary Kiln

Cement rotary kiln belongs to the category of building materials equipment and is a type of lime kiln. Rotary kilns can be divided into cement rotary kilns, metallurgical and chemical rotary kilns, and lime rotary kilns according to the different materials processed.
Cement rotary kiln is the main equipment for dry and wet production lines of cement clinker. Cement kilns are mainly used for calcining cement clinker, and are divided into two categories: dry process cement kilns and wet process cement kilns. Metallurgical and chemical kilns are mainly used for magnetization roasting of poor iron ore in steel plants in the metallurgical industry; Oxidation roasting of chromium and nickel iron ores; Refractory plant roasting high alumina vanadium ore and aluminum plant roasting clinker, aluminum hydroxide; Chemical plants roast minerals such as chromite sand and chromite powder. Lime kiln (i.e. activated lime kiln) is used for roasting activated lime and lightly burned dolomite used in steel plants and ferroalloy plants. Rotary kilns are widely used in industries such as metallurgy, chemical engineering, building refractory materials, and environmental sanitation. The rotary kiln consists of a cylinder body, a support device, a supporting device with a stop wheel, a transmission device, a movable kiln head, a kiln tail sealing device, a coal injection pipe device, and other components. The kiln body of the rotary kiln is inclined to a certain degree from the horizontal, and the entire kiln body is supported by a supporting wheel device with a stop wheel device that controls the up and down movement of the kiln body. In addition to the main transmission, the transmission system also includes an auxiliary transmission device that can still rotate the kiln body when the main power supply is interrupted to prevent bending and deformation of the kiln body. The sealing devices at the kiln head and tail adopt advanced technology to ensure the reliability of the seal.
The rotary kiln structure of cement rotary kiln is sturdy, operates smoothly, and produces high-quality products. It can also provide users with advanced and efficient vertical tube preheaters and five stage cyclone preheaters.
　　

Principle of cement rotary kiln

The maintenance of accessory equipment and the level of thermal system control are related to the safety and efficiency of the operation of the cement rotary kiln during heavy load alternating slow operation under high temperature conditions. The maintenance focus of the transmission device is on the lubrication, operating status, dynamic detection, and meshing accuracy of the large and small gears of the equipment; The installation accuracy of the supporting device determines whether the rotary kiln can operate safely and reliably. During operation, attention should be paid to the reasonable control of the load distribution of each gear supporting wheel, the layout of the supporting wheel, the up and down pressure and time of the hydraulic blocking wheel, the force on the supporting wheel, and the gap between the wheel belt and the pad. The quality of the sealing device directly affects the thermal system and operating costs of the rotary kiln. Strengthening the daily maintenance data organization and analysis of rotary kilns is beneficial for equipment management.