New Method for Preparation of Coke Analogues and Comparability for Industrial Metallurgical Coke

Abstract

To better understand metallurgical coke behavior in blast furnace, the preparation of coke analogues was improved by using demineralized coke powder. Scanning electron microscope, Raman spectroscopy, mercury intrusion method, and CO₂ gasification reactivity test were used to establish the representativeness relation between different coke analogues and metallurgical cokes. The results show that the coke analogues prepared by graphite powder and demineralized metallurgical coke powder were in general representative of industrial coke. With the controlled and reproducible pore characteristic, the average pore diameter of coke analogues is smaller and the average pore area is bigger, while the pore connectivity of metallurgical coke is stronger. Analogue prepared from demineralized coke has a slight superiority over that prepared from graphite in carbon structure and gasification reaction with CO₂. In general, the coke analogue made from demineralized coke has higher comparability to industrial metallurgical coke and are more suitable for laboratory research.