High alumina brick is made of advanced refractory raw materials that are shaped and calcined.

High alumina brick based on different refractory raw materials to produce different product quality

High alumina brick main raw material

  1. High bauxite
  2. Sillimanite minerals: including kyanite, andalusite, sillimanite
  3. Synthetic materials: industrial alumina, synthetic mullite, fused corundum

High alumina bricks is an advanced refractory material. Has the highest temperature.

High alumina brick advantages

  • High thermal stability,
  • High refractoriness
  • Good slag resistance
  • High load softens temperature
  • High temperature creep small
  • Strong resistance to erosion


  • Stove
  • Electric Roof
  • Blast Furnace
  • Reverberatory Furnace
  • Rotary Kiln Lining
  • Hot-Blast Stove
  • Glass Furnace

Technical Data

Chinese Code NameLZ-48LZ-55LZ-65LZ-75LZ-80
Al2O3 ,%≥48≥55≥65≥75≥80
Fe2O3, %≤2≤2≤2≤2≤2
Refractoriness℃, min17501770179017901790
Apparent Porosity%≤22≤22≤23≤23≤21
Bulk Density g/cm32.25-2.352.25-2.352.25-2.352.25-2.352.25-2.35
Cold Crushing Strength Mpa≥39≥44≥49≥54≥65
0.2Mpa Refractoriness Under Load T0.2 ℃,min≥1420≥1470≥1500≥1520≥1530
Permanent Linear Change On Reheating (%)1500℃X2h+0.1~-0.4 x1450℃+0.1~-0.4+0.1~-0.4+0.1~-0.4+0.1~-0.4

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