Some Considerations about Profile of Solid Temperature in Cement Rotary Kiln and Its Controllability

Abstract

As the cement rotary kiln process is a series combination of the sintering, calcining and drying zones, there sometimes occur unstable phenomena. Genarally speaking, the reason is classified as follows:
1) Swing of process itself caused by abnormal state of material's travelling speed.
2) Less measurability and difficulty of predicting internal disturbance.
In this case, the profile of the solid temperature passing through the inside of kiln is disturbed. This paper partially refers to this longitudinal profile of the solid temperature and its own self-controllability of heat exchange. As a conclusion, it can be said that the key point of kiln process control depends upon the stability of material's travelling speed in the kiln because the kiln process itself has own driving force called self-controllability.