Pig iron is the specific industrial designation given to________________?
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Answer: B. product of blast furnace made by reduction of iron ore
Explanation
Pig iron is the primary crude iron product obtained from the blast furnace reduction of iron ore. It is produced by smelting iron ore with coke and limestone in a blast furnace at extremely high temperatures. Pig iron contains high carbon percentages along with silicon, manganese, and sulfur impurities, requiring further refining. A blast furnace is a massive chemical reactor that continuously reduces iron oxides into molten metallic iron. The name pig iron historically originated from the layout of sand molds resembling nursing piglets fed by a central runner. Crude pig iron serves as the indispensable raw starting material for producing cast iron, wrought iron, and commercial steel.
Option A is incorrect because pig iron is the output product of blast furnace reduction rather than its raw input material. Option C is partially descriptive but too vague since pig iron specifically designates the blast furnace product. Options D and E are incorrect because molten ladle iron and scrap metal represent different stages of metallurgical processing.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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