You should spend about 20 minutes on this task.
The diagram below shows the process by which bricks are manufactured for the building industry.
Summarise the information by selecting and reporting the main features, and make comparisons where relevant.
Write at least 150 words.
The process by which bricks are manufactured for the building industry can be outlined in seven consecutive steps.
First the raw material, clay, which was just below the surface of soil in certain clay-rich areas has to be dug up by a digger.
Then the lumps of clay are placed on a metal grid in order to break up the big chunks of clay into much smaller areas, which fall through the metal grid onto a roller, whose motion further segregates the bits of clay. Sand and water are added to make a homogenous mixture, which is then either formed in moulds or cut into brick-shaped pieces by means of a wire cutter.
Those fresh bricks are then kept in a drying oven for at least 24 and a maximum of 48 hours, several dozen if not hundreds of bricks at a time. The dried bricks are then transferred to a so-called kiln, another type of high temperature oven. First they are kept at a moderate temperature of 200C – 1300C. This process is followed by cooling down the finished bricks for 48 to 72 hours in a cooling chamber.
这些新鲜的砖块被放在干燥的烤箱中至少24小时，最多48小时，一次可以存放几十块甚至上百块砖块。然后这些干砖被转移到所谓的窑，另一种高温烤箱。首先，它们被保持在200C – 1300C的中等温度。在此过程中，将成品砖在冷却室内冷却48至72小时。
Once the bricks have cooled down and have become hard, they get packaged and delivered to their final destination, be it a building site or storage.