Question

Arrange the processes involved in the preparation of Portland cement in the correct sequence.

• A. Batch mixing
• B. Clinkering
• C. Cooling
• D. Milling
• E. Packaging

Answer 1

The processes involved in maufacturing of Portland cement are as follows-

1) Batch preparation: The raw materials like limestone, clay, sand and gypsum are mixed to prepare a batch.

2) Clinkering: The batch is then allowed to heat in a furnace. It leads to the evaporation of water vapours and conversion of the batch into a partial molten state. This molten state combines to form a clinker.

3) Cooling and milling: The clinkers are cooled and ground to a very fine powder. This powder is known as Portland cement.

4) Packaging: It involves the packing of cement in airtight bags.