An effective control method of the coke calcining kiln

The process of calcining petroleum coke in a rotary kiln for the production of anodes is a very complicated exothermic reaction. Mathematically modeling the rotary kiln used for the calcination of the coke is very difficult, because the main problem is that the relationships between input variables and control variables are complex, nonlinear, containing time lags and interrelationships, and that the kiln's response to control inputs depends on the prevailing kiln conditions. A set of fuzzy control rules, which has successfully been used in controlling the petroleum coke calcining rotary kiln for an aluminum plant in China, is presented. A practical distributed control system of the coke calcining kiln is also described.