Arrange the steps in a sequence for the manufacture of cement in dry process.
(1) formation of clinker
(2) pulverisation
(3) addition of gypsum
(4) heating to high temperature (1500°C to 1600°C)

Options

A. 2413
B. 2143
C. 2341
D. 2314

Answer

To arrange the steps in a sequence for the manufacture of cement in the dry process, we follow these steps:

1. **Pulverisation**: The raw materials, such as limestone and clay, are mixed and ground into very fine particles. This step is crucial as it prepares the materials for the next stages of cement production.

2. **Heating to High Temperature (1500°C to 1600°C)**: The fine powder obtained from pulverisation is then heated in a kiln at a very high temperature. This process is essential for the chemical reactions that lead to the formation of clinker.

3. **Formation of Clinker**: As a result of the high temperature, the materials undergo chemical changes and form clinkers, which are small, hard nodules.

4. **Addition of Gypsum**: Finally, gypsum is added to the clinker to control the setting time of the cement and enhance its strength.

Thus, the correct sequence for the manufacture of cement in the dry process is:
- **(2) Pulverisation**
- **(4) Heating to high temperature**
- **(1) Formation of clinker**
- **(3) Addition of gypsum**