In the process of making steel from the Pharos of Egypt to the Modern-day, Iron manufacturing has been known for at least 2500 years.
The process of continuous perfection in the techniques and technology of steel making can be divided into a number of stages.
Stage 1: Direct Conversion of Iron Ore
Stage 2: manufacture of Wrought Iron from Pig Iron
Stage 3: The Beginning of Molten (Cast) Steel Production
Stage 4: Appearance of Relative Simple and Inexpensive Methods for Mass Production of Cast Metal
Stage 5: Progress of Electric Steelmaking
Stage 6: Intensification of Steelmaking Process by Oxygen Blowing
Stage 7: Appearance and Development of Remelting Processes
Stage 8: Appearance and Development of Off- furnace or Ladle Processing of Metal ("Secondary Metallurgy")
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