What is the impure copper collected from Bessemer converter commonly called as ?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Bessemer Converter:**
The Bessemer converter is a vessel used in the metallurgy of copper to convert copper sulfide into copper metal. It involves a process called "blistering" where impurities are removed.

2. **Reaction in the Bessemer Converter:**
In the Bessemer converter, a reaction occurs where copper sulfide (Cu₂S) reacts with copper oxide (Cu₂O). This reaction leads to the reduction of copper oxide and the formation of pure copper along with the release of sulfur dioxide gas (SO₂).

...