In the blast furnace process, what is the role of coke?

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Study for the AIT Welder 2nd Period Test. With flashcards and multiple choice questions, each question offers hints and explanations. Prepare confidently for your certification!

Multiple Choice

In the blast furnace process, what is the role of coke?

Explanation:
Coke acts as both the fuel and the reducing agent in a blast furnace. When hot air is blown in, coke combusts to give heat and to generate carbon monoxide: coke reacts with oxygen to form CO2, and that CO2 then reacts with more coke to produce CO. This carbon monoxide is the strong reducer that converts iron oxides in the ore into iron, for example Fe2O3 + 3 CO → 2 Fe + 3 CO2. The high carbon content and porous structure of coke also help sustain the high furnace temperature and allow gases to flow through the burden. It isn’t responsible for dissolving ore, forming slag, or acting as a coolant.

Coke acts as both the fuel and the reducing agent in a blast furnace. When hot air is blown in, coke combusts to give heat and to generate carbon monoxide: coke reacts with oxygen to form CO2, and that CO2 then reacts with more coke to produce CO. This carbon monoxide is the strong reducer that converts iron oxides in the ore into iron, for example Fe2O3 + 3 CO → 2 Fe + 3 CO2. The high carbon content and porous structure of coke also help sustain the high furnace temperature and allow gases to flow through the burden. It isn’t responsible for dissolving ore, forming slag, or acting as a coolant.

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