Development of Light-Weight Aggregate Production Process from Coal Ash with a Shaft Kiln (Part 2)
立炉による石炭灰を原料とする軽量骨材製造プロセスの開発 (第2報)

Mitsutaka KAWAMURA, Takeshi OHTAKE, Kunio UCHIDA, Kunio KAMIYA, Fumikazu IKAZAKI
1986 Journal of the Ceramic Association Japan  
Calcination tests of a pellet made of coal ash were performed in order to obtain the data for design and operation of a mov ing bed shaft kiln. Factors controlling calcination process in a fixed bed are found to be gas flow rate, Gg, oxygen concentra tion of gas, yo20, as well as carbon content of the pellet, xc. From the theoretical consideration on calcination in the fixed bed, the fixed bed behavior can be characterized by the rate, v, of travel of the position where a bed has a maximum
more » ... ra ture, T. The v can be expressed as a function of Gg, yo20, and xc. Using velocity, v, and temperature, T, properties of the calcined product are represented in the v -T plane as the isolines of the product properties. It is shown that isolines determine the desirable operational condition.
doi:10.2109/jcersj1950.94.1093_998 fatcat:hpxcznitwjd6lj5ektrnt36sam