Abstract
To avoid pushing trouble at old coke oven, it is essential to maintain sufficient clearance between coke cake and heating wall. Clearance depends on swelling pressure in the plastic layer and contraction of the semicoke layer. Those parameters are influenced by bulk density of coal charge, coke oven temperature, and the values of blending parameters. The vertical distribution of bulk density is thought to vary the clearance with location in coke oven chamber. In this study, two dimensional model, which considers heat transfer, swelling pressure, and contraction, is proposed to estimate the vertical distribution of clearance. It showed the clearance is minimized near the position of the highest bulk density of coal charge.
