Write chemical reactions taking place in the extraction of zinc from zinc blende.

Explanation

To extract zinc from zinc blende (ZnS), we follow a series of chemical reactions that occur in three main steps: roasting, reduction, and refining. Below are the detailed steps along with the corresponding chemical reactions.

### Step 1: Roasting of Zinc Blende
In this step, zinc sulfide (ZnS) is roasted in the presence of oxygen (O2) at high temperatures (around 1200 K). The reaction leads to the oxidation of zinc sulfide to zinc oxide (ZnO) and sulfur dioxide (SO2) gas.

**Chemical Reaction:**
\[
2 \, \text{ZnS} + 3 \, \text{O}_2 \rightarrow 2 \, \text{ZnO} + 2 \, \text{SO}_2
...