You should spend about 20 minutes on this task. 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

are produced for, and delivered to the building industry

Overall

, there are 7 stages in the whole

brick producing

Add a hyphen

brick-producing

show examples

process, beginning with

clay

excavation and ending with the delivery of the

bricks

to the customers.

Firstly

,

clay

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

clay

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

At

Change preposition

In

show examples

the next stage, sand and water are added to the

clay

. After the

bricks

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

bricks

are

then

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

at

Change preposition

in

show examples

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

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

brick producing

Add a hyphen

brick-producing

show examples

process concludes after the delivered to customers.