Steel

From Efficiency Finder
Jump to: navigation, search

Back to Information about steel coil


(a) Crude steel production methods

The process routes of an integrated steelworks are shown below:


Steel production methods.jpg

Figure 1: Overview of the process route of an integrated steel works - [UK IPR 2/1, 1994] - (a pelletisation plant is not shown, as only one integrated steelworks in Europe has one)

LITERATURE: BAT for the Production of Iron and Steel, December 2001


The figure gives a schematic view of the main material inputs and outputs (emission mass streams) for each stage of the process route of crude iron and steel production.


(b) Hot and cold forming of ferrous metals

After the iron and steel production to the casting process, further processing steps are required for the production of finished steel products. Starting with the semi-finished products ingots, slabs, blooms and billets obtained from ingot casting or continuous casting the further manufacturing steps, like hot rolling, cold rolling and drawing, hot dip metal coating and the related pre- and after treatment of the shaped steel products, are required.

Main operational steps regarding continuous processing are:

  • Reheating and heat treatment of input materials, like slabs, blooms, billets and ingots.
  • Surface rectification and preparation processes: scarfing, grinding, descaling, degreasing, pickling
  • Shaping of steel: rough milling, hot rolling, cold rolling, drawing.
  • Processes yielding in special material or product qualities: annealing, temper rolling/skin pass rolling
  • Hot dip metal coating and finishing.


Regarding batch hot dip coating of fabricated steel products, the following operational steps can be found:

  • Surface preparation of fabricated steel: degreasing, rinsing, pickling, fluxing, drying.
  • Coating with molten metal.
  • After treatment/finishing: cooling, greasing.


Back to Information about steel coil