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Chapter 9: Problem 32

For the manufacture of cement various steps are given below. Arrange the steps in a proper sequence. (1) clinker formation (2) crushing (3) addition of gypsum (4) mixing of raw materials (5) grinding to fine powder (6) calcination in rotary kiln (a) 426135 (b) 246351 (c) 431652 (d) 123456

Short Answer

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Question: Arrange the given manufacturing steps in the correct order to produce cement: (1) Clinker formation, (2) Crushing, (3) Addition of gypsum, (4) Mixing of raw materials, (5) Grinding to a fine powder, (6) Calcination in a rotary kiln. Answer: The correct order of the manufacturing steps is (b) 2-4-6-1-5-3.

Step by step solution

01

Crushing the raw materials

First, the raw materials are crushed into smaller pieces to make them easier to work with. So, the initial step in the manufacturing process is step (2) Crushing.
02

Mixing the raw materials

After crushing, the raw materials are mixed together to get a uniform blend. So, the next step in the manufacturing process is step (4) Mixing of raw materials.
03

Calcination in a rotary kiln

The mixed raw materials are then heated at high temperatures in a rotary kiln to produce a reaction that forms clinker. So, the third step in the manufacturing process is step (6) Calcination in a rotary kiln.
04

Clinker formation

As a result of the calcination process, clinker is produced. So, the fourth step in the manufacturing process is step (1) Clinker formation.
05

Grinding the clinker into fine powder

The clinker produced in the previous step is then ground into a fine powder to get cement. So, the fifth step in the manufacturing process is step (5) Grinding to a fine powder.
06

Addition of gypsum

The final step in the manufacturing process of cement is mixing the fine cement powder with the required amount of gypsum to control the setting time. So, the last step in the manufacturing process is step (3) Addition of gypsum. Following the correct order of the steps, the proper sequence for the manufacture of cement is 2-4-6-1-5-3. Therefore, the correct answer is option (b) 246351.

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