WRITING TASK 1
You should spend about 20 minutes on this task.
The diagram below shows how cement is manufactured.
Summarise the information by selecting and reporting the main features, and make comparisons where relevant.
Write at least 150 words.
- 1QuarryingLimestone and clay are dug from a quarry
- 2CrushingRock is broken into small pieces
- 3GrindingMaterials are ground into a fine powder
- 4BlendingThe powder is mixed in the correct proportions
- 5PreheatingRaw mix is heated in a tower
- 6Kiln heatingIt is burned at 1,450°C in a rotating kiln
- 7CoolingHard lumps called clinker are cooled
- 8Adding gypsumClinker is ground with gypsum
- 9PackingCement is stored and bagged for delivery