Electric Furnace Iron: A Statement of the Present Status

In the application of electric furnace processes to the production of gray iron, decided advances have been made during the past eight years. In the continuous duplexing process described, the metal is melted in the cupola, with just as little coke as will make it run properly, and is then transferred to the electric furnace. In the preferred continuous melting process a cold charge is melted directly in the electric furnace, and, as soon as composition is corrected and the temperature is high enough, part of the molten metal is tapped, and immediately thereafter the equivalent amount of cold metal is charged. This process is of decided commercial importance. At one of the plants 11 tons of gray iron is being tapped every hour. The process has a wide field of application.