Description

Introduction

Ultral High Alumina Brick have an alumina content of ≥80%. The brick bodies are pure white with a dense texture and extremely few black impurity spots, offering premium overall performance.

They possess ultra-high refractoriness and excellent refractoriness under load. Capable of long-term service at temperatures above 1500°C, they deliver outstanding resistance to scouring, acid and alkali corrosion, and molten material erosion.

They are widely applied in high-temperature kilns such as iron and steel blast furnaces, steel ladles, firing zones of cement rotary kilns, non-ferrous smelting kilns, and glass melting furnaces.

Physical and Chemical Specifications

Items		Index
Al₂O₃ (%)	≥	80
Apparent Porosity (%)	≤	21
Bulk Density (g/cm³)	≥	2.7
Cold Crushing Strength (MPa)	≥	70
Refractoriness Under Load (0.2MPa) (℃)	≥	1520
Refractoriness (℃)		1790
Permanent Linear Change on Reheating (%) (1500℃ × 2h)		-0.4 ~ +0.2

Advantage

High Refractoriness: Ultral High Alumina Brick have a refractoriness of over 1750°C. They can maintain stable performance for a long time under high-temperature conditions without easily softening or melting.

Excellent Thermal Shock Resistance: Thanks to its optimized internal microstructure, Ultral High Alumina Brick retain stable structural integrity under drastic temperature fluctuations and effectively resist cracking and spalling.

Superior Corrosion Resistance: The high alumina content endows the bricks with strong resistance to acids, alkalis, molten metals, and other chemicals, enabling long-term service in harsh industrial environments.

High Strength & Abrasion Resistance: Ultral High Alumina Brick feature high cold crushing strength and modulus of rupture. They withstand heavy mechanical stress and offer outstanding wear resistance, resulting in an extended service life.

Good Volume Stability: The bricks show minimal permanent linear change at high temperatures, ensuring a stable lining structure inside kilns and furnaces.

ZINFON Ultral High Alumina Brick Full Production Flow

Raw Material Selection & Warehousing → Sampling for Chemical Analysis → Crushing, Iron Removal & Sieving → Classified Storage of High-Alumina Clinker → Automatic Precision Batching → Sealed Wheel-Mill Mixing → Controlled-Temperature Clay Aging → High-Tonnage Hydraulic Press Forming → Staged Low-Temperature Drying of Green Bricks → Firing in a High-Temperature Tunnel Kiln → Natural Slow Cooling → Comprehensive Physical & Chemical Sampling Inspection of Finished Products → Visual Grading & Sorting → Export Packing on IPPC Pallets → Storage Pending Shipment

High Alumina Bricks Production Flow

Application

Iron & Steel Metallurgy

Used as linings in blast furnaces, hot blast stoves, heating furnaces, and other equipment, providing excellent resistance to high temperatures and molten metal erosion.

Non-ferrous Metallurgy

Used in aluminum electrolytic cells, copper smelting furnaces, and other equipment to withstand high temperatures and molten metal abrasion.

Glass Manufacturing

Suitable for breast walls, tank walls, and other critical areas of glass melting furnaces, offering excellent resistance to high temperatures and molten glass corrosion.

Cement & Ceramics Industry

Used in cement rotary kilns, ceramic kilns, and related equipment, providing resistance to high temperatures and dust abrasion.

Petrochemical Industry

Used as linings in cracking furnaces, heating furnaces, and other processing units, withstanding high temperatures and corrosive gases.

Choose ZINFON Ultral High Alumina Brick

1.Al₂O₃ content ≥80%, with high-temperature resistance up to 1800°C, meeting the requirements of extreme working conditions.

2.Outstanding resistance to acid, alkali, and slag erosion, extending kiln service life and lowering maintenance costs.

3.Low thermal conductivity design delivers excellent heat preservation, reduces energy consumption, and complies with international environmental standards.

4.Customizable sizes and packaging are available to satisfy the demands of customers from various countries and regions.

5.Certified in accordance with ISO standards, ensuring stable and reliable quality for worry-free export.

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