Taking a φ2.3 m×55 m carbon rotary kiln for example

numerical simulations were conducted on the gas and solid spaces of the kiln using the Fluent and Matlab softwares.The influences of parameters such as the secondary and tertiary air inlet positions and air flow

turn-down rigs on the kiln lining

filling ratio of solids

rotation speed of the kiln on the kiln temperature were predicted.The results indicate that

if the secondary and tertiary air inlet positions and air flow

or the size and the number of the turn-down rigs are reasonably designed

the kiln temperature will be increased

resulting in the improvement for the quality of the calcined cokes.In addition

properly increasing the filling ratio of solids or rotation speed can increase the kiln output and ensure the quality of the calcined cokes at the same time.