Alumina Refractory Bricks

High-alumina refractories are made from bauxite, a naturally occurring material containing aluminum hydroxide Al(OH)3 & kaolinitic clays. These raw materials are roasted to produce a mixture of synthetic alumina & mullite (an aluminosilicate mineral with the chemical formula 3Al2O3 – 2SiO2). By definition high-alumina refractories contain between 50% & 90% alumina. They are much more robust than fireclay refractories at high temperatures & in basic environments. In addition, they exhibit better volume stability & abrasion resistance. High-alumina bricks are used in blast furnaces, blast-furnace stoves, and liquid-iron ladles etc.

Advantages

Excellent corrosion resistance to neutral and acidic slag and metal penetration resistance at high liquid temperature.
Improved thermal shock and corrosion resistance at high temperature.
Low Thermal Conductivity
Low Thermal Expansion

Dense Alumina Bricks

Brand	Al₂O₃ % (Min)	Fe₂O₃ % (Max)	BD gm/cc (Min)	AP % (Max)	CCS kg/cm² (Min)	PCE Orton Cone (Min)	RUL Ta°C (Min)	PLC % (Max)/2hrs	Service Temp.°C Max	Application Area
GITA - 30D	30	2.3	2.00	20-22	350	30	1350	±1 @ 1350 °C	1350	Coke Oven and Blast Furnace Battery
GITA - 35D	35	2.3	2.05	20	350	32	1350	±1 @ 1350 °C	1400	For Blast Furnace
GITA - 39 HG	39	1.8	2.10	18-20	400	33	1450	±0.5 @ 1450 °C	1400	BF (upto @ 700 M3 ) Hearth & Bottom, Hot Metal Ladle
GITA - 40 HG	40	2.0	2.10	18-20	400	33	1450	±0.5 @ 1450 °C	1400	BF stove @ Wall Brick (upto 700 M3) Coke oven Battery
GITA - 42 HG	42	1.8	2.20	18-20	400	33	1450	±0.5 @ 1450 °C	1430	BF (upto @ 700 M3) Hearth Bottom Belly & Ladle, Cake Oven Battery
GITA - 45 D	45	1.8	2.20	18	450	33	1450	±0.5 @ 1450 °C	1450	BF (upto @ 700 M3) Bosch & Tuyer zone, Coke Oven Battery
GITA - 50D	50	1.5	2.30	18	450	34	1500	±0.5 @ 1500°C	1450	For Coke Oven Battery

Medium Alumina Bricks

Brand	Al₂O₃% (Min)	Fe₂O₃% (Max)	BD gm/cc (Min)	AP % (Max)	CCS kg/cm² (Min)	PCE Ortton Cone (Min)	RUL Ta °C (Min)	PLC % (Max)/ 2hrs	Service Temp. °C Max	Application Area
GITA - 40	40	3.5	2.05	25	300	32	1350	±1.5 @ 1400 °C	1400	General Purpose upto 1400 C, Saftey lining of steel ladles
GITA - 45	45	3.5	2.15	22	350	32	1400	±1 @ 1450 °C	1400	General Purpose upto 1400 C, Heat Treatment Units, Forging Units & Hot Metal Ladle
GITA - 50	50	3.5	2.30	22	350	33	1400	±1 @ 1400 °C	1450	General Purpose Safety Line refractories

High Alumina Bricks

Brand	Al₂O₃% (Min)	Fe₂O₃% (Max)	BD gm/cc (Min)	AP % (Max)	CCS kg/cm² (Min)	PCE Ortton Cone (Min)	RUL Ta °C (Min)	PLC % (Max)/2 hrs	Service Temp. °C (Max	Application Area
GITA -HA- 60	60	3.5	2.4	23	400	34	1450	±1 @ 1450 °C	1500	Walls, Bottom, & Roof of reheat furnaces, Soaking pit walls and annealing furnaces
GITA-HA - 70	70	3.5	2.6	23	500	36	1470	±2.5 @ 1450 °C	1550	Working lining of steel ladle up to 60 T capacity
GITA-HA - 80	80	2	2.7	20	600	38	1600	±2 @ 1500 °C	1650	Working linining for RF/VAD/VOD

Special High Alumina Bricks

Brand	Al₂O₃% (Min)	Fe₂O₃% (Max)	BD g/cc (Min)	AP % (Max)	CCS kg/cm² (Min)	PCE Orton Cone (Min)	RUL Ta °C Min	PLC % (Max)/ 2hrs	Service Temp.°C Max	Application Area
GITA - 62D	62	1.5	2.50	16	600	36	1550	±0.5 @ 1500 Deg°C	±0.5 @ 1500 Deg°C	For blast furnace bottom
GITA Silimanite	58	0.5	2.50	18	600	37	1600	±0.3 @ 1600 °C	1700	Blast Furnace & Glass Tank
GITA - 70(S)	70	2.5	2.60	18	600	37	1550	±1.5 @ 1500 Deg°C	±1.5 @ 1500 Deg°C	Working lining of steel ladle for high capacity
GITA-MULLITE	70	0.5	2.60	20	600	37	1650	±0.3 @ 1600 °C	1650	Blast Furnace & Glass Tank
GITA - 72D	72	1.0	2.65	18	600	38	1650	±0.5 @ 1500 Deg°C	±0.5 @ 1500 Deg°C	Blast Furnace & Fertilizer Units
GITA - 85	85	1.5	2.80	18	500	38	1600	±0.5 @ 1500 °C	1680	Sponge Iron, Fertiliser Units
GITA - 90	90	0.5	2.90	18	900	40	1700	±0.2 @ 1600 °C	1750	EAF Roof, Fertilises & Petrochemical Industries