Further Considerations of the Plastic Layer Thickness Developed Within a Coke-Oven Charge

摘要

Measurements were made of the plastic layer thickness of crushed medium and high-volatile coals with and without a 5% addition of coke breeze during carbonization in a 7 kg electrically-heated oven. The experiments were part of a study of the nature and characteristics of the thermal softening of coal and investigation into how these and other factors effect the physical and chemical characteristics of coke. Coke strength generally increased as the coal expanded; a reasonable correlation between expansion characteristics and microstrength was noted and discrete relationships between expansion characteristics and the M10 index of the bulk coke were evident. The addition of coke breeze did not affect the expansion to micro-strength or expansion to M10 index relationships. An increase in the expansion of the charge corresponded with an increase in coke porosity.