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Production Process

The production of steel follows the sequence

view all process
  1. 01. Iron Making
  2. 02. Steel Making
  3. 03. Continuous Casting
  4. 04. Rolling

01.Iron Making, 02.Steel Making, 03.Continuous Casting, 04.Rolling

*Move pointer overeach facility on the map reveal it's name. Click for a full explanation of it's role in the production process.

Process Overview

01. Iron Making

After undergoing processing, ironore and coke are fed into a blast furnace reaching upwards of 100-meters tall. Inside the furnace, a steady blast of super-heated 1,200℃ air is blown upthrough the raw materials, creation a reaction in which the burning coke pushes the furnace temperature to iron's melting point of 1,535℃. In this reaction, the carbon monoxide released from the burning coke reacts with the iron ore to remove the oxygen while the heat melts the iron that remains. This process lasts between five and six hours as the temperature gradually climbs to the melting point. When the furnace is "tapped" to remove the molten iron. It contains impurities like carbon and sulfur that will be syste matically reduced or eliminated in the steelmaking process.

02. Steel Making

The hot metal tapped from the blast furnace has a carbon content of between 4% and 5% as well as impurities such as phosphorous and sulfur that negatively impact it's strength and durability. This hot metal is charged into a basic oxygen furnace or "converter" along with scrap. A high-pressure stream of pure oxygen is then injected into the hotmetal, transforming impurities into gases and slag. The result of this relatively brief process is crude steel that's ready to be formed intosemi-finished products.

03. Continuous Casting The process of turning liquid ironinto solid iron.

When the pure steel is still inliquid form it must be poured into molds and passed through a casting machine whereupon it coagulates and becomes a middle material such as slabs, brooms, orbillets. These materials are then put through rolling mills, where different shapes, e.g. slabs, blooms, or billets are created depending on the stage ofthe process.

04. Rolling The process of shaping iron.

Depending on the stage and the pressure of the rolling process, the iron that passes through the mill is transformed into a variety of shapers such as steel plates, pipes, etc. The temperature at which the pure steel is rolled also varies from cold to hot. The rolling process can be divided as hot rolling and cold rolling process. The rolling process involves taking semi-finished steel products and running them through a series of roller stands to improve strength or reduce their thickness. Rolling can be done either at ambient temperature-cold rolling or attemperatures over 1,000℃ hot rolling-depending on the desired steel characteristics.

  • A Movie of the Steel Manufacturing Process
    (Pohang)
    A Movie of the Steel Manufacturing Process (Pohang)
  • A Movie of the Steel Manufacturing Process
    (Gwangyang)
    A Movie of the Steel Manufacturing Process (Gwangyang)
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