Calcined anthracite is raw anthracite coal that has been heat-treated in electric or gas calcination furnaces that produce temperatures as high as 2000 C. This results in some graphitic development on the coal in the finished product.
When to compared to conventional no-calcined anthracite it has low moisture, volatile, and sulfur , hydrogen, and nitrogen content. Calcined coal has become a functional substitute for synthetic graphite in certain foundry and steel mill applications.
Electrically calcined anthracite is used in manufacturing certain electrodes, cathodes, Soderberg pastes, and carbon blocks.