The relation between the strength and structure of metallurgical coke

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Abstract
For a series of metallurgical cokes covering the range encountered in industrial practice, the tensile strength, as determined by the diametral-compression test, has been considered in relation to aspects of the porous structure. By means of reflected light microscopy and a computerised image analysis system a quantitative characterisation of the porous structure was made in terms of the number, shape and size of the pores in chosen size categories. It is found that for metallurgical cokes in general, no single structural parameter gives a good correlation with the tensile strength. More complex relationships using composite terms involving several of the structural parameters can be derived and these lead to correlations of high statistical significance. The data are discussed with reference to other published work on the relation between the strength and structure of similar materials.

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