SRL MD High Alumina Fire Bricks

Description

• Alumina Content (Al₂O₃): 50% – 55%
• Maximum Service Temperature: 1450°C (2642°F)
• Cold Crushing Strength (CCS): ≥ 40–50 MPa
• Apparent Porosity: ≤ 20–22%
• Bulk Density: 2.2 – 2.4 g/cm³
• Refractoriness Under Load (RUL): ≥ 1400°C
• Excellent thermal shock resistance
• Low iron content – suitable for food-grade applications

Key Features:

• Direct flame contact safe
• SRL MD High Alumina Fire Bricks
• High mechanical strength & abrasion resistance
• Perfect dimensional accuracy & smooth surface
• Uniform color and texture
• Long service life even under heavy wood/charcoal firing

Key Benefits of High Alumina Fire Bricks

• Exceptional Refractoriness: Service temperatures up to 1750–1800°C depending on grade.
• Superior Slag Resistance: High Al₂O₃ content protects against acidic and basic slag attack.
• Thermal Shock Stability: Handles rapid temperature changes without cracking.
• High Mechanical Strength: Cold crushing strength often >50–80 MPa.
• Low Thermal Conductivity: Improves furnace energy efficiency.

Common Grades and Specifications

High alumina fire bricks are classified by alumina percentage:

• 50–60% Al₂O₃ (Medium Duty): Cost-effective for moderate temperatures.
• 60–70% Al₂O₃ (High Duty): Balanced performance for most furnace zones.
• 70–80%+ Al₂O₃ (Super Duty): Premium grades for aggressive environments.

Typical properties:

• Bulk Density: 2.3–2.8 g/cm³
• Apparent Porosity: 18–24%
• Refractoriness Under Load (RUL): >1450–1600°C
• Fe₂O₃: <2% for better chemical resistance