Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone.

Bauxite calcining rotary kilns are lined with __________ bricks.

A

Fireclay

B

Carbon

C

85% alumina

D

Corundum

Rotary kilns in cement industry are lined with____bricks.

A

Fireclay

B

Silica

C

Lead

D

High alumina & high magnesia

Thermal efficiency of a limestone calcination rotary kiln may be around __________ percent.

A

20

B

40

C

65

D

80

Calcination of limestone is not done in a __________ kiln for producing lime.

A

Vertical shaft

B

Rotary

C

Fluidised bed

D

Fixed bed

Calcination of limestone to produce lime is done in a __________ kiln.

A

Tunnel

B

Rotary

C

Vertical shaft

D

Both B and C

Rotary kilns are used in the

A

Calcination of limestone & dolomite

B

Cement manufacture

C

Both A and B

D

Neither A nor B

Magnesite chrome bricks are used in the

A

Roof lining of basic open hearth & other basic furnaces

B

Reheating furnaces

C

Soaking pits

D

All of the above

Chrome magnesite is not used in the

A

Inner lining of L.D. converter

B

Aluminium melting furnaces

C

Wear out lining of steel melting furnaces

D

All of the above

Chrome magnesite bricks are

A

Acidic in nature

B

Neutral in nature

C

Having higher RUL than silica bricks

D

Made by mixing 30% chromite and 70% periclase

Chrome magnesite bricks are used in the

A

Side walls of soaking pits and arc furnaces

B

Copper melting furnaces & converters

C

Burner block of glass tanks

D

All of the above

Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone.

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