Some features of the structure of metallurgical cokes and their effects on strength

Five theoretical models relating strength to total pore volume are fitted to the experimental data for seven cokes and the goodness of fit is compared. Estimates of zero-porosity strength are obtained by extrapolation and are compared with alternative estimates obtained by fracturing small ( approximately 0.1 mm) coke particles containing only 5% of pores. Predictions of the surface area of the microfissures formed when some constituents of coke contract around non-contracting particle constituents during the coke formation process are compared with experimental results obtained by microscopy.