Question

The maximum temperature that can be achieved in blast furnace is :

• A. upto 1200 K
• B. upto 2200 K
• C. upto 1900 K
• D. upto 5000 K

Answer 1

The Correct Option is B

The question concerns the maximum temperature achievable in a blast furnace. A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally iron. Here is how to determine the correct answer:

1. Understanding Blast Furnace Operation: A blast furnace operates by using high temperatures to reduce and melt iron ore. The main reaction inside the furnace is between iron oxide and carbon monoxide to produce iron and carbon dioxide.
2. Temperature Range: The maximum temperature in a blast furnace is typically less than that reached in electric furnaces but can be quite high due to the exothermic nature of the reactions inside the furnace.
3. Correct Option Analysis: - "upto 1200 K": This is too low for a blast furnace, which regularly operates well beyond this temperature. - "upto 1900 K": While closer, this does not reflect the maximum potential temperature in optimal conditions. - "upto 2200 K": This is the most accurate representation under controlled conditions and suitable for producing iron efficiently. - "upto 5000 K": This is far beyond what is feasible in a blast furnace, which is more characteristic of other high-temperature processes like plasma heating.
4. Conclusion: Based on the typical operational parameters of a blast furnace, where the hot zone experiences temperatures from 1900 K to slightly above 2000 K, the most appropriate answer is "upto 2200 K." This answer aligns with industrial standards and known furnace conditions.

Therefore, the correct answer to the question is upto 2200 K.