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Comparison of similarities and differences between converter steelmaking and converter copper smelting
I think you're asking about the difference between a long process and a short process.

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.