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High Alumina Castable

Al2O3 ≥45

Corrosion resistant

Low porosity

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High Alumina Castable is a refractory castable made of high alumina raw materials as aggregate and powder, and added with binder.

High Alumina Castable has anti-permeation, corrosion resistance, impact resistance, wear resistance, good mechanical properties, strong furnace structure integrity, better air tightness than brick furnaces, prolongs furnace life, saves furnace repair costs, and has significant economic benefits, etc.

High Alumina Castable Features

  1. High mechanical strength.
  2. Good thermal shock resistance.
  3. Good abrasion resistance.
  4. Good slag resistance and corrosion resistance.
  5. High refractoriness, high load refractoriness.
  6. High density, low porosity.
  7. Good peeling resistance.

High Alumina Castable Video

High Alumina Castable Specification

Dry Density g/cm3≥2.3≥2.5≥2.6≥2.65≥2.7≥3
Al2O3 (%)≥45≥60≥70≥75≥80≥90
Modulus of Rupture Mpa 110℃*24h≥5≥8≥9≥9≥10≥12
Modulus of Rupture Mpa 1500℃*3h≥8(1350℃)10 (1450℃×3h)1215
Compressive Strength Mpa 110℃×24h≥30≥40≥40≥45≥45≥45
Compressive Strength Mpa 1450℃×3h≥60≥80≥80≥85≥90≥85
Linear Dimensional Change After Fired %±0.5 1350℃×3h±0.5 1450℃×3h±0.5 1450℃×3h±0.5 1450℃×3h±0.5 1500℃×3h±0.5 1500℃×3h
Refractoriness (℃)≥1710≥1740≥1790≥1790≥1790≥1790
Working Temp (℃)145014501500155016001650


High alumina castables are mainly used as linings for boilers, blast furnace hot blast stoves, heating furnaces, ceramic kilns and other kilns.

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