What is the material collected from reverberatory furnace in the metalurgy of copper ?

Explanation

To answer the question regarding the material collected from the reverberatory furnace in the metallurgy of copper, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Process**: In the metallurgy of copper, ores are processed to extract the metal. One of the key steps involves using a reverberatory furnace.

2. **Mixing the Ore**: The copper ore is mixed with silica (SiO2) before being introduced into the reverberatory furnace. This mixture is crucial for the extraction process.

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