Silica is added to roasted copper ore during | vedclass

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Question

(B) Silica $(SiO_2)$ is added during the smelting process of copper extraction to remove iron impurities present in the roasted ore.During roasting,ir

Vedclass · Accepted Answer

ferrous oxide

Vedclass · Answer

(B) Silica $(SiO_2)$ is added during the smelting process of copper extraction to remove iron impurities present in the roasted ore.During roasting,iron sulfides are converted into iron oxides $(FeO)$.$FeO$ is an impurity that needs to be removed. Silica acts as an acidic flux and reacts with the basic impurity $FeO$ to form a fusible slag,iron silicate $(FeSiO_3)$.The reaction is: $FeO + SiO_2 \rightarrow FeSiO_3$ (slag).This slag is less dense than the molten copper matte and can be easily separated.

Silica is added to roasted copper ore during extraction in order to remove

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