In the pyrometallurgical extraction of iron in a blast furnace, which of the following accurately de — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

In the blast furnace, limestone ($CaCO_3$) is added. It decomposes to form $CaO$, which acts as a basic flux. It reacts with the acidic impurity (gangue) $SiO_2$ to form a fusible slag, $CaSiO_3$ (calcium silicate).