Question:
In the Hoeganaes process, which statement is not correct?
In the Hoeganaes process, which statement is not correct?
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Hoeganaes process is primarily hydrogen reduction of iron oxides.
Updated On: Jun 29, 2026
- Limestone acts as a flux and limits sulphur contamination
- Mill scale is the raw material used
- The final reduction stage occurs in a hydrogen atmosphere
- Treatment is carried out in silicon carbide containers
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The Correct Option is A
Solution and Explanation
Concept:
Hoeganaes process is a powder metallurgy process for producing iron powder by reduction of iron oxides (mill scale) using hydrogen.
Step 1: Raw material check.
Mill scale (iron oxide) is used → correct.
Step 2: Reduction atmosphere.
Final reduction is carried out in hydrogen → correct.
Step 3: Container material.
Silicon carbide containers are used → correct.
Step 4: Error identification.
Limestone is NOT a key component in Hoeganaes process; sulfur control is not achieved by limestone flux here. Final Answer: \[ \boxed{\text{Limestone acts as a flux and limits sulphur contamination}} \]
Step 1: Raw material check.
Mill scale (iron oxide) is used → correct.
Step 2: Reduction atmosphere.
Final reduction is carried out in hydrogen → correct.
Step 3: Container material.
Silicon carbide containers are used → correct.
Step 4: Error identification.
Limestone is NOT a key component in Hoeganaes process; sulfur control is not achieved by limestone flux here. Final Answer: \[ \boxed{\text{Limestone acts as a flux and limits sulphur contamination}} \]
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