Steel manufacturing requires large quantities of what three fundamental raw materials_______________?
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Answer: C. iron ore, coal and lime stone
Explanation
Steel manufacturing in blast furnaces requires iron ore, coal coke, and limestone as raw materials. Iron ore supplies the metallic iron, coke acts as fuel and reducing agent, and limestone is a flux. These three materials interact chemically at high temperatures to produce liquid pig iron. Integrated steel mills convert raw mineral inputs into refined structural steel products. Coke is processed coal that provides intense heat and carbon monoxide gas for reduction. Limestone reacts with rock impurities to form liquid slag that floats atop molten iron.
Steel production is a foundational heavy industry supporting global construction and manufacturing. Raw material supply chains require careful logistics to feed continuous blast furnace operations. Environmental regulations mandate strict emission controls around modern integrated steel mills. Sulphur is an undesirable impurity rather than a fundamental raw ingredient for steelmaking. Carbon is present in coal coke but is not added as a separate raw ingredient in this form. Option D is incomplete because coal coke is essential as both fuel and chemical reducer.
- Subject
- Engineering
- Category
- Civil Engineering
- Topic
- —
- Difficulty
- medium
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