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

The diagram shows the steps and gives

the

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information about the equipment involved in the production of

bricks

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for the construction industry.

Overall

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, raw materials pass through three stages before being formed.

Then

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,

bricks

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go through three final stages before being delivered. First of all, clay is extracted by an excavator.

Then

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it is sifted through a metal grid onto a roller. Sand and water are added to the ready clay. Afterwards, depending on the type of brick,

this

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mixture is either moulded or directed to a wire, where it is cut to size. In the following stage,

bricks

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are dried in an oven for about 24 – 48 hours before undergoing the main firing.

Next,

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bricks

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are burned in the moderate temperature kiln, where the temperature ranges from 200 to 980 degrees Celsius.

Subsequently

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,

bricks

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are heated in the next kiln with a temperature range of 870-1300 degrees Celsius. Once fired properly,

bricks

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are transported into a cooling chamber, where they are kept for up to 3 days before

finally

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being packed for delivery.