The diagram illustrates the process that is used to manufacture bricks for the building industry. Summarise the information by selecting and reporting the main features and make comparisons where relevant.

The flow chart shows how

bricks

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are produced for, and delivered to the building industry

Overall

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, there are 7 stages in the whole

brick producing

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brick-producing

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process, beginning with

clay

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excavation and ending with the delivery of the

bricks

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to the customers.

Firstly

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,

clay

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is dug up by using a big digger. To get rid of the oversized pieces,

clay

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is placed on a metal grid and small pieces drop onto a large roller.

At

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In

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the next stage, sand and water are added to the

clay

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. After the

bricks

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are shaped by using a wire cutter or a mould, they are moved to a drying oven for 24 to 48 hours. Those

bricks

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are

then

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fired in a special kiln at a moderate temperature (200c - 980c)

at

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in

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the fourth step. Afterwards, they continue to be heated for the second time at a higher temperature (870c - 1300c) in another kiln. Before being packaged at the sixth stage, the

bricks

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are treated in a cooling chamber for 48 to 72 hours. The entire

brick producing

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brick-producing

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process concludes after the delivered to customers.