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 percent 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-steel 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

BrandAl2O3 % (Min)Fe2O3 % (Max)BD gm/cc (Min)AP % (Max)CCS kg/cm² (Min)PCE Orton Cone (Min)RUL Ta°C (Min)PLC % (Max)/2hrsService Temp.°C MaxApplication Area
GITA - 30D302.32.0020350301350±1 @ 1350 °C1350Coke Oven and Blast Furnace Battery
GITA - 35D352.32.0520350321350±1 @ 1350 °C1400For Blast Furnace
GITA - 39 HG391.82.1018400331450±0.5 @ 1450 °C1400BF (upto @ 700 M3 ) Hearth & Bottom, Hot Metal Ladle
GITA - 40 HG402.02.1018400331450±0.5 @ 1450 °C1400BF stove @ Wall Brick (upto 700 M3) Coke oven Battery
GITA - 42 HG421.82.2018400331450±0.5 @ 1450 °C1430BF (upto @ 700 M3) Hearth Bottom Belly & Ladle, Cake Oven Battery
GITA - 45 D451.82.2518450331450±0.5 @ 1450 °C1450BF (upto @ 700 M3) Bosch & Tuyer zone, Coke Oven Battery
GITA - 50D501.52.3018450341500±0.5 @ 1500°C1450For Coke Oven Battery
GITA - 62D621.52.5516600361550±0.5 @ 1500°C1600For blast furnace bottom
GITA - 70(S)702.52.6518600371550±0.5 @ 1500 °C1600Working lining of steel ladle for high capacity
GITA - 72D721.02.6518600381650±0.5 @ 1500 °C1650Blast Furnace & Fertilizer Units

Medium Alumina Bricks

BrandAl2O3% (Min)Fe2O3% (Max)BD gm/cc (Min)AP % (Max)CCS kg/cm² (Min)PCE Ortton Cone (Min)RUL Ta °C (Min)PLC % (Max)/ 2hrsService Temp. °C MaxApplication Area
GITA - 40403.52.0525300321350±1.5 @ 1400 °C1400General Purpose upto 1400 C, Saftey lining of steel ladles
GITA - 45453.52.1522350321400±1 @ 1450 °C1400General Purpose upto 1400 C, Heat Treatment Units, Forging Units & Hot Metal Ladle
GITA - 50503.52.3022350331400±1 @ 1400 °C1450General Purpose
Safety Line refractories

High Alumina Bricks

BrandAl2O3% (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 (MaxApplication Area
GITA - 60603.52.423400341450±1 @ 1450 °C1500Walls, Bottom, & Roof of reheat furnaces, Soaking pit walls and annealing furnaces
GITA - 70703.02.623500361470±2.5 @ 1450 °C1550Working lining of steel ladle up to 60 T capacity
GITA - 808022.820600381600±2 @ 1500 °C1650Working linining for RF/VAD/VOD

Special High Alumina Bricks

BrandAl2O3% (Min)Fe2O3% (Max)BD g/cc (Min)AP % (Max)CCS kg/cm² (Min)PCE Orton Cone (Min)RUL Ta °C MinPLC % (Max)/ 2hrsService Temp.°C MaxApplication Area
GITA - 85D851.52.9018500381600±0.5 @ 1500 °C1680Sponge Iron, Fertiliser Units
GITA - 90D900.53.0019900401700±0.2 @ 1600 °C1750EAF Roof, Fertilises & Petrochemical Industries
GITA-MULYTE 60580.952.5520600371600±0.3 @ 1600 °C1700Blast Furnace & Glass Tank
GITA-MULYTE 70680.52.7018600371650±0.3 @ 1600 °C1650Blast Furnace & Glass Tank