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Refractories for Blast Furnace

 The list is illustrative and does not cover the full range of products and some of the improved items which have been recently developed.
 
BF Stack Lining A B C D
Al2O3 % 39 42 54 42
B.D. (gm/cc) 2.20 2.25 N.A. N.A.
A.P. % 19 16 23 12
CCS (kg/cm2) 400 500 300 700
RUL (ta °C) 1450 1480 1480 1500
PLC % ±0.5 ±0.3 ±0.5 ±0.2
 (at °C/2 hrs) 1450 1500 1500 1450

 

BF Bottom Lining A B C
Al2O3 % 62 63 62
A.P. % 15 15 15
CCS (kg/cm2) 600 600 600
RUL (ta °C) 4kg/cm2 1500 1500 1500
PLC % (at 1450°C/2 hrs) ±0.2 ±0.2 ±0.2

 

BF Tap hole A B
Al2O3 % 72 70
SiC % N.A. 13
A.P. % 17 14
CCS (kg/cm2) 500 80
 (at °C) N.A. 400
RUL (ta °C) 4kg/cm2 1650 N.A.
PLC % (at 1500°C/2 hrs) ±0.5 N.A.

 

BF Trough A B C D
Al2O3 % 70 70 70 71-73
SiC % 10-15 22 15 18-20
A.P. % N.A. 13.7 N.A. N.A.
B.D.(gm/cc) 2.8 3.1 2.9 2.8
 (at °C/24 hrs) 110 1000 110 1500
CCS (kg/cm2) 600 650 600 500
 (at °C/3 hrs) 1400 1000 1450 1500
PLC % +0.50 N.A. +0.12 +0.80
 (at °C/3 hrs) 1400 N.A. 1100 1500
MOR (kgcm2) (110°C/24 hrs) 75 74 N.A. N.A.
Refractoriness (°C) N.A. 1650 1820 1700

 

BF Stove Checker A B C D E
Al2O3 % 70 62 62 63 0.7
SiO2 % N.A. N.A. N.A. N.A. 95
B.D. (gm/cc) 2.55 N.A. N.A. 2.47 N.A.
A.P. % 18 24 24 20 21
CCS (kg/cm2) 500 250 250 400 300
RUL (2kg/cm2) (ta °C) 1700 1450 1500 N.A. N.A.
PLC % ±0.2 ±0.4 ±0.4 ±0.2 ±0.2
(at 1500°C) 4 hrs 4 hrs 4 hrs 2 hrs 2 hrs
Creep (N/mm2 at 1500°C/20-50hrs) N.A. N.A. N.A. 0.2 0.2
Spalling at 1300°C (cycles) N.A. N.A. 8 N.A. N.A.

 

Ceramic Burner Blocks A B
Al2O3 % 53 64
Fe2O3 % 1.7 1.5
B.D.(gm/cc) 2.35 2.50
A.P. % 20 22
CCS (2kg/cm2) 40 45
RUL (ta °C) 1350 1450
PLC % (at °C/2 hrs) ±0.1 ±0.1+0.2
 (at °C)/4 hrs 1400 1500
MOR at room temp (Nmm2) 15 15
Creep % (2kgcm2/20-50 hrs) 0.2+0.03 0.2+0.03
 (at °C) 1350 1500

 

 

     
 
 

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