9分雅思范文之流程图 水泥制造The diagrams below show the stages and equipment used in the cement-making process, and how cement is used to produce concrete for building purposes.
范文:
The diagrams illustrate the phases and apparatus to make cement and how cement is utilised in the production of concrete for construction.
The production of cement involves a 5 stage, linear process that begins with the mixing of raw materials and culminates in the packaging of new cement. Making concrete is a simpler process that involves mixing four ingredients in a concrete mixer.
Limestone and clay are crushed and the resulting powder is then mixed before being passed through a rotating heater. Once heated this mixture travels over a conveyor belt and is ground through a grinder. Now that the cement has been produced, it is packaged and transported to a building site where it can be used to make concrete.
Concrete is made up of half gravel, quarter sand, 10% water and 15% cement. All of these are added together in a cylindrical drum and rotated until concrete is yielded.
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