Phosphate High Alumina Brick - High Refractory, Thermal Shock Resistant, Wear-Resistant Material

Product Overview

Phosphate high alumina brick is an advanced refractory material made from high-quality bauxite clinker (Al₂O₃ ≥ 65%) bonded with phosphate (such as aluminum dihydrogen phosphate). It features high refractoriness, excellent thermal shock resistance, high strength, and superior wear resistance, making it widely used in high-temperature industrial equipment such as cement kilns, metallurgical furnaces, and glass furnaces.

Key Features

1. High Refractoriness

• High Al₂O₃ content ensures refractoriness ≥ 1750°C, suitable for high-temperature industrial furnaces.

2. Outstanding Thermal Shock Resistance

• Phosphate bonding forms a stable AlPO₄ structure at high temperatures, resisting rapid cooling and heating without cracking.

3. High Strength & Wear Resistance

• Ceramic bonding enhances mechanical strength and abrasion resistance, ideal for high-stress areas (e.g., cement kiln transition zones).

4. Chemical Corrosion Resistance

• Resistant to acidic slag and weak alkali erosion, suitable for various industrial environments.

5. High Strength at Medium-Low Temperatures

• Cures below 500°C without high-temperature sintering, ensuring easy installation.

6. Excellent Volume Stability

• Low shrinkage at high temperatures ensures structural integrity and extends furnace lifespan. 

  Applications

  1. Cement Industry

  Rotary Kiln Transition Zone & Cooling Zone – Resists high temperatures and thermal shock.
  Grate Cooler & Kiln Hood – Withstands clinker abrasion.

  2. Steel Metallurgy

  Blast Furnace Throat & Hot Blast Stove – Resists gas and dust erosion.
  Electric Furnace Roof & Tapping Channel – Resists molten iron and slag corrosion.

  3. Non-Ferrous Metallurgy

  Copper, Lead, Zinc Smelting Furnaces – Resists molten metal corrosion.

  4. Glass Industry

  Regenerator Checkerwork in Glass Furnaces – Resists alkali vapor attack.

  5. Power & Chemical Industries

  CFB (Circulating Fluidized Bed) Boilers – Wear and corrosion-resistant.
  Waste Incinerators – High-temperature and chemical corrosion resistance.

  Technical Specifications

  Parameter	Value
  Al₂O₃ Content	≥65%
  Refractoriness	≥1750°C
  Cold Crushing Strength	≥50MPa
  Load Softening Temperature (0.2MPa)	≥1450°C
  Thermal Shock Resistance (1100°C water quenching)	≥20 cycles
  Bulk Density	2.6~2.8 g/cm³

  FAQs

  Q1: Is phosphate high alumina brick suitable for alkaline environments?

  A: It resists weak alkalis but performs poorly in strong alkaline conditions (e.g., Na₂O, K₂O). For such cases, chrome-corundum or magnesia-chrome bricks are recommended.

  Q2: Is preheating required before installation?

  A: Yes, a controlled heating process (300~600°C) is necessary to ensure proper curing of the phosphate binder.

  Q3: What are the advantages over traditional high alumina bricks?

  A: Phosphate bonding provides higher strength at medium-low temperatures, better thermal shock resistance, and improved wear resistance.

  • Phosphate high alumina brick

  • High alumina refractory brick

  • Thermal shock resistant brick

  • Cement kiln refractory brick

  • Wear-resistant refractory

  • High-temperature furnace lining

  • Phosphate-bonded alumina brick