The effect of volume change of coal during carbonization in the direction of coke oven width on the internal gas pressure in the plastic layer

摘要

The coking pressure in a coke oven, which is caused by the internal gas pressure in the coal plastic layer, is determined by the gas permeability of the layer. The gas permeability of the plastic layer depends on its density as well as the physical property of the plastic coal itself. The plastic layer is sandwiched between the coke and the resolidifying layers and the coal layer and the effect of the volume change of these outer layers in the direction of coke oven width, i.e. contraction and compression, on the density of the plastic layer and the internal gas pressure was studied.