Hot blast main (carrying air at 1000¬¨‚àûC) in blast furnace are lined with __________ bricks.#

Hot blast main (carrying air at 1000¬¨‚àûC) in blast furnace are

1.	Hot blast main (carrying air at 1000¬¨‚àûC) in blast furnace are lined with __________ bricks.#
A.	Silica
B.	Fireclay
C.	Magnesite
D.	Zirconia
Answer» C. Magnesite