Charge Coke/Charge Carbon

 In electric arc furnaces, commonly used in steel production from scrap metal, Direct Reduced Iron (DRI), Hot Briquetted Iron (HBI), and similar raw materials, various components are added to the furnace charge. These include metal, sources of calcium oxide and magnesium oxide, and carbon sources such as anthracite or a mixture ranging from 3 inches to 1/4 inch with over 75% fixed carbon content.

The role of carbon in the charge coal is critical for several aspects of electric arc furnace operation. It prevents excessive oxidation of metal and flux materials before melting, accelerates slag formation, and provides significant energy through its reaction with oxygen to produce carbon monoxide. This reaction substantially reduces energy consumption in the steelmaking process.

Carbon monoxide produced plays a crucial role in achieving low levels of dissolved gases in steel, which are removed along with the carbon monoxide. Additionally, oxide inclusions in the steel are transferred to the slag.

However, the recovery of carbon from charge coal in electric arc furnaces can vary, influenced significantly by the size and quality of the charge coal. Optimal size and quality are essential for consistent and effective carbon recovery in steel production.