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Seminole Group - Coking Coal

Coking Coal is essential to the steel industry.

Making steel requires the ability to burn at high temperatures, making coking coal a valued commodity for the steel making process. The process starts with coking coal, and then morphs into coal coke, a byproduct of coking coal. It is the coke that is actually burned in the steel making process.

Moisture content, volatile content, ash content and plasticity are characteristics of coal that are used to determine a grade for bituminous coal. The highest grades have a specific plasticity and volatility and also have low ash content.

In bituminous coal the carbon content is between 60 and 80 percent. It must be coked in order to remove volatile components that include water, coal gas and coal tar before it can be used industrially. Through the coking process of coking coal these components are driven off by baking the coal without oxygen at temperatures as high as 2000 degrees centigrade.