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Refractory Bricks for Circling Furnace and Refining Furnace
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Item 		£¨MT-£©Magnesium-c bricks Magnesium-c-calcium bricks £¨MCa-£©Magnesium-calcium
10A 10B 10C 14A 14B 14C 18A 18B 18C 70 75 80
Mgo% 80 78 76 74 72 70 58-70 70 75 80
Cao%   10-15 20 15 10
C% 10 14 18 10-18  

Total impurity %		   4 4    

Apparent porosity %		 4 5 6 4 5 6 3 4 5   3    
Bulk density g/cm3 2.9 2.85 2.80 2.90 2.82 2.77 2.90 2.82 2.77 2.80 3.05    
Cold crushing strength Mpa 40 35 30 40 35 25 40 35 35 25 70    
0.2MPaRefractoriness under load (kp)¡æ     1700    

Resistance to thermal rupture

1400¡æ¡Á30min MPA

6 5 4 12 8 5 10 7   6      
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