Carbon-bonded MgO refractories Flashcards
1
Q
What is pitch?
A
~ generated from coal tar or petroleum residue
~ mixed with dead burned MgO and heated to 100C to soften pitch
2
Q
How are carbon bonded refractories made?
A
~ bricks are pressed and then heated to 400C to PYROLYZE the pitch (volatize and leave a graphite residue)
~ pyrolized bricks are assembled into a furnace structure and fired in-situ
3
Q
What is pitch used for?
A
~ a BINDER for a mix of graphite flakes and dead burned MgO