Way 1 - Blast furnace route

Ore / oxygen steel: production with coke

In nature, iron occurs as ore. In mining, the ore is extracted from the rock and processed. To turn the ore into iron, it is reduced and smelted in a blast furnace with coke at over 1,300°C. The resulting pig iron contains more than 2% carbon and cannot be used for products in this form. It is only through the LD process that the pig iron is converted into steel by blowing with pure oxygen.

This process produces around 70% of crude steel. It is the established mass production process for crude steel. The disadvantage of the process is the CO2 produced. Large amounts are released during the reduction process.  

CO2: approx. 1.7 t per 1.0 t of crude steel

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