MHT CET · Chemistry · General Principles and Processes of Isolation of Metals

What is the role of tuyers used in blast furnace for extraction of iron?

A It enables the even distribution of charge.
B To blow a blast of preheated air in to the furnace.
C It is used to remove molten slag and iron.
D It prevents loss of hot gases.

Verified Solution

Answer & Solution

Correct Answer

(B) To blow a blast of preheated air in to the furnace.

Step-by-step Solution

Detailed explanation

Near the base, the furnace is provided with pipes called tuyeres for supplying a hot blast of air, a tapping hole for molten iron and a slag hole through which slag flows out. There is an outlet near the top of the waste gases. Near the tuyeres, carbon burns to give carbon dioxide producing a lot of heat.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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