Magnesia Calcium Brick Refractories

Mag Calcium Brick is mainly used as lining material for AOD furnace, VOD furnace and LF furnace in steel making industry.

Key Features for Mag Calcium Bricks

  • Excellent thermal shock stability
  • Good resistance to structural spalling
  • Strong resistance to slag penetration
  • Clean the molten steel

Product Data

Type LKMG-15 LKMG-20 LKMG-25 LKMG-30 LKMG-40 LKMG-50
Chemical Composition
MgO (%) 80.3 76.3 70.3 66.3 56.3 43.3
CaO (%) 17 21 27 31 41.0 54
Al₂O₃ (%) 0.5 0.5 0.5 0.5 0.5 0.5
Fe₂O₃ (%) 0.7 0.7 0.7 0.7 0.7 0.7
SiO₂ (%) 1.3 1.3 1.3 1.3 1.3 1.3
Mechanical Properties
Bulk Density (Kg/m³) 3030 3030 3030 3030 3000 2930
Apparent Porosity % 13 12 12 13 13 12
Cold Crushing Strength (MPa) 80 90 80 80 80 70
Refractoriness Under Load 0.2 MPa°C 1700 1700 1700 1700 1700 1700
Rupture Strength (Mpa) 2.5 – 4.5 2.5 – 4.5 2.5 – 4.5 2.5 – 4.5 2.5 – 4.5 2.5 – 4.5
Thermal Conductivity (W/m.k)⁻¹ 3 - 4 3 - 4 3 - 4 3 - 4 3 - 4 3 - 4
Thermal expansion (%)
800°C 0.80 – 1.0 0.80 – 1.0 0.80 – 1.0 0.80 – 1.0 0.80 – 1.0 0.80 – 1.0
1200°C 1.35 – 1.60 1.35 – 1.60 1.35 – 1.60 1.35 – 1.60 1.35 – 1.60 1.35 – 1.60

Please see our digital catalogue for general size of firebricks

Fired Magnesia Brick Magnesia Chrome Bricks Directed Bonded Magnesia-Chrome Brick Semi-Rebonded Magnesia-Chrome Brick
Magnesia Carbon Bricks Magnesia Calcium Brick Magnesia-Alumina Spinel Brick Magnesia-Ferrum Spinel Brick
Nitride Carbon Silicon Carbide Bricks Silica Bricks Silica Mullite Bricks Fused Cast AZS

Please also see our Functional Refractories here

Monolithic Refractories Material Magnesia Product for Electric Arc Furnace in Steel Melting Plant Firebrick Refractories (Alumina Base Products) Insulation Bricks & Lightweight Insulation Bricks
Refractory Firebrick with Magnesia Based & Others Anchoring System & Steel Fibre for Refractory Crucible & Special Shape Refractory Pre-cast Refractory Product
Functional Refractories Wear Resistant Ceramic Products Micasheet for Induction Furnace

For further information, you can contact our Sales Engineer, or you can contact us directly here.