In the modern blast furnaces, the charge consists of a mixture of

Options

A. Calcined iron oxides + lime + anthracite coal
B. Calcined iron oxides + lime stone + coke
C. Hydrated iron oxides + dolomite + coke
D. Iron pyrites + lime +bituminous coal

Explanation

To solve the question regarding the composition of the charge in modern blast furnaces, we can follow these steps:

### Step 1: Understand the Components of the Charge
The charge in a blast furnace typically consists of three main components:
1. Iron oxide (usually in the form of hematite, Fe2O3, or magnetite, Fe3O4)
2. A flux (such as limestone, CaCO3) to remove impurities
3. A reducing agent (commonly coke, which is a form of carbon)

### Step 2: Analyze the Given Options
We are provided with four options:
1. Calcinated iron oxide + limestone + anthracite coal
2. Calcinated iron oxide + limestone + coke
3. Hydrated iron oxide + dolomite + coke
4. Iron pyrite + lime + bituminous coal

### Step 3: Evaluate Each Option
- **Option 1**: Calcinated iron oxide + limestone + anthracite coal
- Anthracite coal is not commonly used in modern blast furnaces; coke is preferred.

- **Option 2**: Calcinated iron oxide + limestone + coke
- This option includes the correct components: iron oxide, limestone, and coke.

- **Option 3**: Hydrated iron oxide + dolomite + coke
- While dolomite can be used, hydrated iron oxide is not a common charge material.

- **Option 4**: Iron pyrite + lime + bituminous coal
- Iron pyrite is not used in blast furnaces, and bituminous coal is less effective than coke.

### Step 4: Identify the Correct Option
After evaluating all options, we find that **Option 2** (Calcinated iron oxide + limestone + coke) is the correct answer.

### Final Answer
In modern blast furnaces, the charge consists of a mixture of calcinated iron oxide, limestone, and coke.

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