Long process: blast furnace → converter → refining outside the furnace → continuous casting → continuous rolling; Short process: electric furnace → refining outside the furnace → continuous casting → continuous rolling.
Converter: A kind of steelmaking furnace.
The furnace body is cylindrical, supported on a horizontal shaft frame and can rotate.
It is also used to smelt copper. A metallurgical furnace with a rotatable furnace body is used for blowing steel or matte.