Question

Explain the steps involved in the manufacture of cement.

Answer 1

Cement is manufactured in two steps:

1. Formation of clinker.
2. Formation of cement from clinker.

• Raw materials are first crushed and homogenised into the mixture into a rotary kiln.
• There it is heated with ${2000}^{\circ }$ flame.
• The kiln is kept at an inclined position so that the material reaches the other end and cools down.
• Basic oxides are mixed to this mixture and clicker is obtained.
• Gypsum and other additives are added to the clinker

All the constituents are ground leading to fine and homogenous powder. Cement is obtained.