Coke Electrical Resistivity as Cumulative Characteristic of its Properties

The dependence of the resistivity of coke on the component composition of coal batches and the final temperature of the process was studied. Taking into account that the resistivity and reactivity are influenced by some common factors, such as temperature level and coke readiness, which indicates the orderliness of its structure, the relationship between these indicators was established. Electrical resistivity is a cumulative indicator of coke properties, the values of which are determined by ash content, sulfur content, volatile yield, petrographic composition and carbonization conditions of coal raw materials. The obtained mathematical dependencies are characterized by high correlation values (0.6-0.84). The proposed regression equations can be recommended for the optimization of the composition and quality of production batches, since they have a significant impact on the resistivity of coke. This is particularly relevant when coke is used in electrothermal processes, since the productivity, electrical and thermal efficiency of the furnace depend on the electrical resistivity of the coke.