Chemical Engineering :: Refractory Technology
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The main raw material for manufacture of silicon carbide refractories is
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Chromite refractories are used in
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Which of the following has the lowest electrical resistivity ?
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Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory
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Silica bricks have low spalling resistance below 600°C, due to its
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Tar dolomite bricks are used in the
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Pick out the wrong statement.
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Which furnace consumes maximum refractory annually in an integrated steel plant ?
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Lower part of hot metal mixer are lined with __________ bricks.
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Pick out the wrong statement.
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A.
Electrical conductivity of refractory is not important, when these are to be used in electrical furnaces.
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B.
Graphite and metals are the good electrical conductor among the refractories and others are all electrical insulators.
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C.
Refractories used for lining electrical furnaces should ordinarily have very low electrical conductivity.
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D.
Electrical conductivity of porous refractory material is low.
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A.
Sand & coke is the main raw material for the manufacture of silicon carbide.
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B.
Carbon refractories can not be used in the furnaces operating under reducing conditions.
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C.
Mullite can be obtained by the heating of alusite, kyanite or silimanite.
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D.
Silica occurs in nature in all cellular, amorphous or crystalline form.
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