Well block for tundish is mainly divided into Al-MgO based and fireclay based well block. Among, Al-MgO based well block is unfired brick, which has been applied to several iron and steel companies and gotten excellent effect.
Main Performance Index Item Brand Unburnt alumina magnesia bricks Fireclay-based Chemical Composition，% ≥ Al2O3 60 40 MgO 10 — 110℃×24h Compression Strength，Mpa ≥ 40 15 Modulus of Rupture，Mpa ≥ 10 — 1400℃×3h Compression Strength，Mpa ≥ 60 20 Modulus of Rupture，Mpa ≥ 15 — Linear Change，% ±1 ±1 Apparent Porosity，% ≤ 20 23
Item
Brand
Unburnt alumina magnesia bricks
Fireclay-based
Chemical Composition，% ≥
Al2O3
60
40
MgO
10
—
110℃×24h
Compression Strength，Mpa ≥
15
Modulus of Rupture，Mpa ≥
1400℃×3h
20
Linear Change，%
±1
Apparent Porosity，% ≤
23
