Chemistry - Metallurgy Question with Solution | TestHub
Which process decreases the % of iron content?
Options:
Answer:
Solution:
The question asks which process decreases the percentage of iron content.
Option A: Bessemerization of pig iron removes impurities like carbon, silicon, and manganese, INCREASING the percentage of iron.
Option B: Magnetic separation of hematite (an iron ore) concentrates the iron minerals, INCREASING the percentage of iron.
Option C: Heating of copper matte in a silica-lined converter is part of copper refining. Iron impurities are oxidized to FeO, which then reacts with silica to form iron silicate slag (), which is removed. This process DECREASES the percentage of iron in the remaining copper-rich material.
Option D: Formation of wrought iron from cast iron involves removing carbon and other impurities, thereby INCREASING the percentage of iron.
Therefore, the correct answer is C.