What Is A Rotary Kiln In Cement?

Cement rotary kiln is a common industrial equipment. Wide range of application materials: cement, kaolin, bauxite, lime, ceramic sand, lithium carbonate, zinc oxide, magnesium metal, solid waste and hazardous waste incineration without and so on. It is mainly used for high temperature heat treatment and transformation of material properties. By heating the material inside the rotary. Materials in the kiln body tumbling and moving, fuel combustion heat generated by the transfer to the material. It can complete the process of calcination, sintering, decomposition, smelting, roasting, gasification and other processes. The specific can be decided according to the material application and process demand.

Cement rotary kiln is used for calcining cement clinker. It is a long cylindrical vessel. It is usually placed horizontally. The material enters the rotary kiln through the inlet at one end. The other end moves gradually along the rotary kiln axial direction. Finally, it is discharged from the discharge port.

What Is A Rotary Kiln In Cement?

Cement rotary kiln and working principle

It is used for the calcination of cement clinker. Raw cement is calcined at high temperature to become cement clinker. In the production process of cement: the raw material powder is ground first, and the clinker is then calcined and cement powder is ground. The cement rotary kiln is low at one end and high at the other. The high end feeds, the low end discharges and feeds coal. Thus the process of continuous rotary to complete the calcination of clinker in vivo. The material enters the kiln through the feed opening, and the cylinder has a certain tilt angle and slow rotational speed. The material rolls along the axial and radial direction and moves forward gradually. The material is injected from the kiln head through the burner into the kiln body for combustion. Heat is transferred to the material. A liquid phase is generated during the movement of the material. Minerals such as: tricalcium silicate, dicalcium silicate, tricalcium aluminate, tetracalcium ferroaluminate, etc. are produced. This completes the sintering and produces cement clinker. Eventually discharged from the outlet. Then into the cooler. Hot air is formed during the process of material recalcination. It enters the mill system from the feed end of the kiln. Finally, it is discharged into the atmosphere by the chimney.

Cement rotary kiln components

The equipment is mainly composed of: cylinder, supporting structure, transmission device, active kiln head, kiln tail sealing device, combustion device and other components. It has the characteristics of simple structure, reliable operation and intelligent control system.

Advantageous features of cement rotary kiln

High-temperature heat treatment capacity: the material is treated at high temperature. The working temperature can reach hundreds of degrees Celsius or even higher. Suitable for various high temperature treatment processes. For example: calcining, roasting, incineration, smelting, etc.
Large-scale processing capacity: has a large volume and production capacity. Able to handle a large amount of materials. It can meet various large-scale industrialisation demands and processing demands.
High degree of automation: full automatic operation, continuous line operation, safe and reliable, convenient operation, low labour intensity and other characteristics.
Strong adaptability: it can be applied to different types of materials. By adjusting the technical parameters of rotary kiln, it can be applied to the production and processing of different materials. For example: solid, liquid, gas materials.
Heat energy utilisation: it can heat up the heat energy of materials. There is good efficiency of heat energy utilisation. In cement production. Cement rotary kiln uses natural gas, coal and other fuels for heating. The flue gas heat energy generated is recycled and reused. So as to improve the efficiency of energy use.