Magnesia Iron Spinel Bricks

Magnesia iron spinel bricks are excellent "chrome-free" products for the burning zone of cement kilns. They possess an outstanding ability to form a kiln coating, along with good thermal shock stability, resistance to cement clinker erosion, and a low thermal expansion rate. They exhibit excellent performance in the burning zone of cement kilns and are primarily applied in this area.

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Physical and Chemical Indicators

Item	Magnesia Iron Spinel Bricks	High-Toughness Magnesia Iron Spinel Bricks
MgO (%)	≥ 85	≥ 88
Fe₂O₃ (%)	5~7.5	5~6
Al₂O₃ (%)	3~5	4~7
Bulk Density (g/cm³)	≥ 3	≥ 2.9
Apparent Porosity (%)	≤ 17	≤ 16
Cold Crushing Strength (MPa)	≥ 45	≥ 55
Thermal Shock Resistance (Cycles, 1100℃ water cooling)	≥ 6	≥ 8
Refractoriness Under Load (0.2MPa, ℃)	≥ 1600	≥ 1650
Thermal Expansion Rate (%) at 1400℃	≤ 1.6	≤ 1.7
Thermal Conductivity (W/(m·K)) at 350 ± 25 ℃	≤ 2.6	≤ 2.6

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