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High Alumina bricks

High Alumina bricks
Dense Alumina-Silicate Bricks for Industrial Furnace Linings

High Alumina bricks Manufacturer & Exporter in India

High Alumina Bricks for High-Temperature Industrial Applications

High Alumina Bricks are refractory fire bricks containing elevated alumina (Al₂O₃) content, designed for selected high-temperature industrial furnace and kiln linings. Their chemical composition, density, strength, and thermal properties vary by grade, making correct material selection essential for reliable refractory performance.

Oryvia Refractories offers high alumina refractory bricks in multiple alumina grades, with the catalogue overview covering 25% to 80% alumina. Available configurations across the refractory brick range include standard bricks, tapers, arch bricks, slabs, blocks, and customised shapes, subject to the required specifications.

Industrial Applications

Depending on the grade and operating conditions, high alumina bricks may be suitable for furnace and kiln linings in steel, cement, foundry, glass, and other high-temperature industrial operations. Their suitability depends on working temperature, mechanical loading, furnace atmosphere, chemical exposure, and thermal cycling.

How to Select High Alumina Refractory Bricks

When selecting high alumina bricks, consider alumina content, bulk density, apparent porosity, cold crushing strength, refractoriness under load, and the specific requirements of your furnace lining. Brick dimensions, shape, installation design, and compatibility with refractory mortar should also be evaluated.

Oryvia Refractories, a division of Oryvia Global LLP, brings over 30 years of company-wide experience, three manufacturing units, and more than 700 completed projects across 20+ countries. Contact us to discuss your high alumina brick requirements and request product specifications or a quotation.

Why choose us

01
Multiple Alumina Grade Options The Oryvia Refractories catalogue describes high alumina bricks across a 25–80% alumina range and provides detailed specifications for several grades between 30% and 80%. Each listed grade has its own chemical composition and physical properties. Confirm the detailed specification for the grade required by your project.
02
A Range of Brick Shapes Refractory lining designs can require different brick geometries. The catalogue identifies standard bricks, tapers, blocks, slabs, tiles, arch bricks, cupola bricks and customised shapes across the range. Buyers should specify the required shape and dimensions so the appropriate product configuration can be discussed.
03
Clear Technical Requirements for Procurement An effective refractory enquiry should identify the required grade, dimensions, shape, quantity and service conditions. Providing technical drawings or an existing product specification, where available, helps clarify the requirement and supports a more informed discussion about product suitability and quotation details.
04
30+ Years of Refractory Industry Experience As the refractory manufacturing business of Oryvia Global LLP, Oryvia Refractories draws on more than three decades of domain experience across steel, cement, foundry, glass, boiler, and petrochemical sectors. We speak the language of plant engineers and maintenance contractors, streamlining technical clarification and procurement workflows.
Technical Specification

Product Data Sheet For Calcined Bauxite

Perticulars Al2O3 Fe2O3 Apparent Porosity (%) Bulk Density (g/cm3) CCS (kg/cm2) PLC (%) RUL (Ta0C)
30% Alumina Bricks 28-30 % 3.4-4.5 % 18-22% 2.05 250-300 -0.8 to 0.3 at 13500C/2h 1350-1400
35% Alumina Bricks 34-35 % 3.4-4.2 % 22-23% 2.1 300-350 -0.8 to 0.3 at 14000C/2 1350-1400
40% Alumina Bricks 38-40 % 3.4-4.2 % 21-22% 2.15 350-550 -0.8 to 0.3 at 14000C/2h 1350-1400
45% Alumina Bricks 43-45 % 3.4-4.2 % 20-21% 2.23 400-600 -0.8 to 0.3 at 14000C/2h 1360-1410
50% Alumina Bricks 48-50 % 3.0-3.5 % 18-19% 2.32 450-650 -0.8 to 0.4 at 14500C/2h 1400-1450
55% Alumina Bricks 53-55 % 2.5-3.0 % 18-19% 2.42 450-650 -0.5 to 1.0 at 14500C/2h 1400-1450
60% Alumina Bricks 58-60 % 2.5-3.0 % 16-17% 2.51 550-800 -0.4 to 2.0 at 15500C/2h 1450-1500
65% Alumina Bricks 63-65 % 2.5-3.0 % 15-16% 2.55 600-850 -0.4 to 2.0 at 15500C/2h 1500-1550
70% Alumina Bricks 68-70 % 2.0-2.5 % 13-15% 2.62 600-900 0.3 to 2.5 at 16000C/2h 1550-1600
80% Alumina Bricks 78-82 % 1.5-2.0 % 13-15% 2.7 950-1000 0.1 to 0.2 at 16500C/2h 1650-1700
GRITS AVAILABLE:  mm: 0-1, 1-3, 3-5, 0-30, 0-50 Mesh: -200, -325

Frequently Asked Questions

  • What are High Alumina Bricks and how do they differ from standard fireclay bricks?
    High Alumina Bricks are dense alumina-silicate refractory bricks manufactured with an aluminum oxide (Al2O3) content higher than that of standard fireclay or SK-series bricks. By using calcined bauxite and other alumina-rich raw materials, they form stable mullite and corundum mineral phases during firing. This provides higher refractoriness under load, superior mechanical abrasion resistance, and stronger protection against corrosive slags and alkali vapors than conventional fireclay bricks in demanding industrial furnace zones.
  • What technical specifications should I check before purchasing high alumina bricks?
    Compare alumina content, iron oxide content, apparent porosity, bulk density, cold crushing strength, permanent linear change and refractoriness under load, where applicable. Operating conditions and the lining design also matter. Ask for the relevant technical information for the exact grade, including the associated test conditions, rather than assuming that all high alumina bricks have identical properties.
  • Which industries and furnace zones commonly use High Alumina Bricks?
    High Alumina Bricks for industrial applications are widely used across iron and steel plants (blast furnace stoves, hot metal ladles, torpedo cars, and reheating furnaces), cement and lime rotary kilns (calcining and transition zones, preheater cyclones, and clinker coolers), ferrous and non-ferrous foundries (cupolas and melting furnaces), glass tank regenerators, and industrial boilers or petrochemical heaters. Their suitability for any specific zone depends on operating temperature, structural load, and slag chemistry.
  • Is a higher alumina percentage always better for every furnace lining?
    No, choosing the highest available alumina grade is not always the best technical or commercial decision. While higher alumina content generally increases refractoriness and load-bearing capacity at elevated temperatures, certain intermediate alumina grades may offer better thermal shock resistance or cost efficiency in zones experiencing rapid temperature fluctuations or moderate thermal duty. Engineers should evaluate alumina percentage alongside bulk density, apparent porosity, refractoriness under load, and slag chemistry.
  • When should buyers choose High Alumina Bricks vs. Magnesia Bricks or Insulating Fire Bricks?
    High Alumina Bricks are dense working-lining bricks designed for high structural load, physical abrasion, and acidic-to-moderately-basic slag environments. When a zone is exposed to highly basic steelmaking slags or severe alkaline attack in cement burning zones, basic Magnesia Bricks are required instead to prevent chemical fluxing. Conversely, Insulating Fire Bricks (IFB) are lightweight, porous bricks used for backup thermal insulation or clean hot-face linings rather than heavy abrasion or molten metal contact.
  • Can Oryvia Refractories supply tapered kiln shapes and custom-designed bricks?
    Yes, alongside standard rectangular straight bricks, rotary kilns, ladles, and furnace roofs require tapered shapes such as arches, wedges, keys, skewbacks, and custom drawing-based blocks to achieve tight radial brickwork joints. Buyers should share their required standard shape codes or detailed dimensional drawings when submitting an enquiry so Oryvia Refractories can confirm shape availability and tooling requirements for the order.
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