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Refractories for Basic Oxygen Furnaces

 The list is illustrative and does not cover the full range of products and some of the improved items which have been recently developed.

 
Magnesite/MgCr bricks A B
MgO % 87 70
Cr2O3 % N.A. 7-12
A.P. % 20 20
CCS (kg/cm2) 400 350
RUL (ta °C) 1600 1580

 

Mag Carbon/AMC bricks A B C D E
MgO % 97 97 90 95 14
Al2O3 % N.A. N.A. N.A. N.A. 75
FC % 5 18 8-10 10 6
A.P. % 6 5 4 6 6
B.D. (gm/cc) 3.00 2.85 2.92 2.90 2.80
CCS (kg/cm2) 500 300 400 400 400
MOR at room temp kg/cm2 150 100 N.A. N.A. N.A.
MOR at 1400°C kg/cm2 40 100 90 40 N.A.

 

Magnesite bricks for BOF/EAF A B C D
MgO % 87 91 85 40
Cr2O3 % N.A. N.A. N.A. 18
A.P. % 18 18 22 24
CCS (kg/cm2) 500 600 350 250
RUL (ta °C) 1600 1600 1550 1550
PLC % (at 1600°C/2 hrs) N.A. N.A. +0.5 +0.5

 

Magnesite bricks for BOF/VAD/VOD Ladle A B
MgO % 96 60
Cr2O3 % N.A. 15
A.P. % 17 22
CCS (kg/cm2) 500 350
RUL (ta °C) 1700 1650

 

Direct Bonded bricks for VOD/AOD A B C
MgO % 60 66 65
Cr2O3 % 15 13 15
A.P. % 18 18 21
CCS (kg/cm2) 500 400 350
RUL (ta °C) 1740 1700 1650
PLC % (at 1600°C) N.A. N.A. +0.5

 

 

     
 
 

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