This study aimed to investigate the relationship between the tensile
strength of metallurgical coke and both the textural composition of the
carbon matrix and the porous structure of the coke, and further to assess
the use of these structural features as bases of methods of coke strength
The forty-four cokes examined were produced in a small pilot-oven from
blended-coal charges based on six coals differing widely in rank. Their
textural composition was assessed by incident polarized-light microscopy
while pore structural parameters were measured by computerized image
analysis allied to reflected light microscopy.
The tensile strength of coke could be related to textural data with
accuracy using several relationships, some of which were based on a model
for the tensile failure of coke. Relationships between tensile strength
and pore sturctural parameters were less successful, possibly because of
difficulties associated with the measuring system used. Neverthless
relationships involving combinations of pore structural and textural data
were developed and investigated.
It was shown that relationships between tensile strength and calculated
textural data had promise as the basis of a method of coke strength
prediction. Also, tensile strengths could be calculated from the blend
composition and the tensile strength of the coke produced from component
cokes. Both methods have value in different situations.
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy of Loughborough University.