The slag obtained in extraction of copper pyrites is mainly

Options

A. `FeSiO_(3)`
B. `MnSiO_(3)`
C. `CaSiO_(3)`
D. `CuSiO_(3)`

Explanation

To determine the slag obtained in the extraction of copper pyrites, we can follow these steps:

### Step 1: Understand the Extraction Process
Copper is extracted from copper pyrites (CuFeS₂) through a series of processes including concentration, roasting, and smelting. The first step involves concentrating the ore to remove impurities.

**Hint:** Look into the processes involved in the extraction of copper from its ore.

### Step 2: Identify the Components Removed
During the roasting process, impurities such as arsenic, antimony, and sulfur are removed. This is crucial as it prepares the ore for the next step where it is mixed with other materials.

**Hint:** Consider what impurities are typically found in copper pyrites and how they are dealt with during extraction.

### Step 3: Mixing with Coke and Sand
After the impurities are removed, the concentrated ore is mixed with coke (a form of carbon) and sand (SiO₂). This mixture is then subjected to high temperatures in a blast furnace.

**Hint:** Think about the role of coke and sand in the smelting process.

### Step 4: Chemical Reaction in the Blast Furnace
In the blast furnace, the iron oxide (FeO) present in the ore reacts with silica (SiO₂) from the sand to form a slag. The reaction can be represented as:
\[ \text{FeO} + \text{SiO}_2 \rightarrow \text{FeSiO}_3 \]
This compound, FeSiO₃, is known as slag.

**Hint:** Recall the general reaction between metal oxides and silica in metallurgical processes.

### Step 5: Identify the Correct Slag Composition
From the options provided:
1. FeSiO₃
2. MnSiO₃
3. CaSiO₃
4. CuSiO₃

The correct answer is FeSiO₃, which is the slag formed during the extraction of copper from copper pyrites.

**Hint:** Compare the chemical formulas of the options with the derived slag composition.

### Final Answer
The slag obtained in the extraction of copper pyrites is mainly **FeSiO₃**.