What is characteristic of coke?

Coke is a porous, carbon-rich material produced by the pyrolysis of coal in the absence of air, typically used in steelmaking and as a fuel. It has a high carbon content, low volatile matter, and is known for its high calorific value and strength, making it suitable for sustaining high temperatures in blast furnaces. Additionally, coke has a limited amount of impurities, which helps in reducing sulfur and phosphorus content in steel. Its structure allows for efficient airflow, enhancing combustion efficiency.