Discussion
Magnesite and dolomite are classed as
Answer: A
Correct answer: basic refractories
Magnesite and dolomite are rich in magnesia and lime, so they are basic and are used where the slag is basic - in steelmaking converters and furnaces, and in the burning zone of a cement kiln. Their weakness is hydration: dolomite in particular will slake in damp storage, so the bricks must be kept dry until they are built in.
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