Bottom of basic open hearth furnace are constructed of__________________?
Correct answer: D. Dead burnt magnesite ramming mass
- A. Silicon carbide bricks
- B. Porous fireclay bricks
- C. Semi-silica bricks
- D. Dead burnt magnesite ramming mass
Explanation
A basic open-hearth furnace requires a basic refractory bottom to resist basic slags, so dead-burnt magnesite is used as a ramming mass. Fireclay and silica-containing materials would be attacked by the basic slag.
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