Cement vertical shaft kiln

Petroleum and Gas

The vertical kiln is a vertical cement kiln, the kiln cylinder is vertical and does not rotate, and there are two types: ordinary vertical kiln and vertical kiln.

A steel cylindrical vessel with a low-speed rotating inner lining of refractory material, used for the calcination of cement clinker. It is at a certain inclination on several pairs of supporting wheels, driven by a motor or hydraulic transmission, and the cylinder rotates within a certain speed range. Raw materials are fed from the end (kiln tail) and move towards the low end (kiln head). Fuel is blown in from the low end, producing flames that burn the raw materials into cl. The exhaust gases are discharged from the kiln tail. The rotary kiln is the most important thermal equipment in the cement industry.

During the development of the cement industry different production methods and different types of rotary kilns have emerged. According to the method of raw material preparation, they can be divided into dry production and wet production, and theary kilns corresponding to the production methods can be divided into dry rotary kilns and wet rotary kilns. Due to the different heat exchange devices at the kiln head and kiln tail, they can also be divided into different types of kilns.

Working principle

The vertical mill is driven by the motor to drive the reducer and then drive the grinding disc to rotate. The material is fed from the feeding port falls in the center of the grinding disc. At the same time, the hot air enters the mill from the air inlet. With the rotation of the grinding disc, the material moves the edge of the grinding disc under the action of centrifugal force. When it passes through the ring groove on the grinding disc, it is crushed by the pressure of the roller and crushed. The crushed material is picked up by the high-speed airflow of the air ring at the edge of the grinding disc. Large particles directly fall on the grinding for re-grinding. The material in the airflow passes through the upper separator. Under the action of the rotating rotor, the coarse powder falls from the cone hopper the grinding disc for re-grinding, and the qualified fine powder goes out of the mill with the airflow and is collected by the dust collector, which is the product. material containing moisture is dried in the process of contacting with the hot airflow. By adjusting the temperature of the hot air, the moisture requirement of the product can be met for different materials, so as to meet the required product moisture. By adjusting the separator, the required fineness of different products can be achieved.