Hubei Zhongnai New Material Technology Co., Ltd.

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High-alumina special-shaped bricks

Hubei Zhongnai New Materials Technology Co., Ltd. specializes in producing high-alumina shaped bricks with a refractoriness of 1750-1790℃ and an Al2O3 content of 48%-90% or more. They are widely used in high-temperature industrial equipment such as steelmaking electric furnaces, glass melting furnaces, and cement rotary kilns.

Key words:

High Alumina Profiled Brick

Classification:

Refractory materials for metallurgical industry

Refractory brick

High Alumina Brick

Product inquiry

Product Overview

High-alumina shaped bricks are a neutral refractory material with an alumina content of 48% or more. They are made from bauxite or other raw materials with a higher alumina content through molding and calcination. Hubei Zhongnai New Material Technology Co., Ltd. Professional production of various specifications of high-alumina shaped bricks. Their refractoriness is higher than that of clay bricks and semi-silica bricks, reaching 1750~1790℃, making them high-grade refractory materials.

1750-1790℃

Refractoriness Range

48%-90%+

Al₂O₃ Content

≥45MPa

Room Temperature Compressive Strength

≥2.5g/cm³

Bulk Density

Neutral Material

Acid and Alkali Corrosion Resistance

High-Alumina Shaped Brick Technical Parameters

Hubei Zhongnai New Material Technology Co., Ltd. Produced strictly in accordance with national standards; all technical indicators meet or exceed industry requirements.

Technical Indicators	Unit	Technical Requirements	Hubei Zhongnai New Material Actual Indicators
Al₂O₃ Content	%	≥65	≥65 (up to 90%+)
Refractoriness	℃	≥1790	1750-1790
Bulk Density	g/cm³	≥2.5	≥2.5
Fe₂O₃ Content	%	≤2.5	≤2.5
0.2MPa Load Softening Start Temperature	℃	≥1510	≥1510
Apparent Porosity	%	≤22	≤22
Linear Change Rate	%	0.3	≤0.3
Room Temperature Compressive Strength	MPa	≥45	≥45

High-Alumina Brick Grading Standard System

Hubei Zhongnai New Material Technology Co., Ltd. According to international and domestic standards, production is strictly graded according to Al₂O₃ content.

Corundum Brick Series

Al₂O₃ content: >90%
Ultra-high refractoriness, suitable for extreme conditions
Hubei Zhongnai New Material Professional Customization
Suitable for the most demanding high-temperature environments

Grade I High-Alumina Brick

Al₂O₃ content: >75%
High-grade refractory material
Excellent corrosion resistance
Steelmaking electric furnaces, glass melting furnaces

Grade II High-Alumina Brick

Al₂O₃ content: 60-75%
Medium to high-grade refractory material
Excellent cost performance
Suitable for cement rotary kilns and hot blast stoves

Grade III High-Alumina Brick

Al₂O₃ content: 48-60%
Basic high-alumina refractory material
Economical and practical
Widely used in general industrial kilns

International Standard Comparison

Hubei Zhongnai New Material Technology Co., Ltd. Products meet multiple national standards:

• Chinese Standard ：Al₂O₃ content lower limit 48% (three-level grading system)
• European Standard ：Al₂O₃ content lower limit 42%
• Hubei Zhongnai New Material ：Produced strictly according to the highest standards to ensure product quality

Product Core Advantages

Hubei Zhongnai New Material Technology Co., Ltd. High-alumina shaped bricks have the following excellent performance advantages:

🔥 Ultra-high Refractoriness

Refractoriness reaches 1750-1790℃, higher than clay bricks and semi-silica bricks. It has excellent thermal stability and is suitable for extreme high-temperature environments. Hubei Zhongnai New Material strictly controls the firing temperature.

⚖️ Neutral Refractory Characteristics

High Al₂O₃ content, close to neutral refractory material, can resist the erosion of both acidic and alkaline slags. Although it contains SiO₂, its resistance to alkaline slag is slightly weaker than its resistance to acidic slag.

💪 Excellent mechanical strength

Room temperature compressive strength ≥45MPa, bulk density ≥2.5g/cm³, the dense structure ensures long-term use stability. Hubei Zhongnai New Materials strictly controls quality.

🎯 Excellent slag resistance

Good slag erosion resistance, suitable for various metallurgical furnaces. Softening start temperature under 0.2MPa load ≥1510℃, small deformation at high temperature.

📐 Customized shapes available

Hubei Zhongnai New Materials Technology Co., Ltd. has a strong ability to customize special-shaped bricks and can produce various special-shaped high-alumina bricks according to customer needs.

⭐ Good volume stability

Linear change rate ≤0.3%, apparent porosity ≤22%, ensuring the dimensional stability and structural integrity of the product in high-temperature environments.

Wide range of applications

Hubei Zhongnai New Material Technology Co., Ltd. High-alumina special-shaped bricks, with their excellent performance, are widely used in various high-temperature industrial fields:

Metallurgical industry

Electric arc furnace for steelmaking: arc furnace walls, furnace tops
Blast furnace: furnace body, key parts of the furnace waist
Hot blast stove: heat storage chamber, combustion chamber
Reflector furnace: furnace hearth, flue
Bessemer converter: lining, furnace bottom
Converter: special parts of the furnace lining

Building materials industry

Glass melting furnace: melting pool, working pool
Cement rotary kiln: burning zone, transition zone
Rotary kiln lining: various specifications of special-shaped bricks
Ceramic kiln: high-temperature firing equipment
Lime kiln: vertical kiln, rotary kiln

Professional supporting products

Open-hearth regenerative checker bricks
Stoppers for casting systems
Nozzle bricks: various specifications
Special-shaped bricks: customized shapes
High-temperature pipelines: inner lining protection
Industrial furnaces: bricks for special parts

💰 Economic considerations

Professional suggestions from Hubei Zhongnai New Materials Technology Co., Ltd.:

Although the price of high-alumina bricks is higher than that of clay bricks, in key parts requiring high refractoriness and erosion resistance, high-alumina special-shaped bricks are the best choice. In general parts, if clay bricks can meet the requirements, it is not necessary to use high-alumina bricks. We provide the most economical solutions for our customers.

Hubei Zhongnai New Materials Technology Co., Ltd. - Corporate Strength

🏭 Advanced production equipment

Hubei Zhongnai leading equipment
• 400T-1000T large hydraulic presses
• Two 192-meter-long modern high-temperature tunnel kilns
• Precision molding and calcination equipment
• Complete production line for customized special-shaped bricks

🔬 Strict quality control

Full process quality assurance
• Strict selection and testing of raw materials
• Real-time monitoring of the production process
• Detailed test report for each batch of products
• Testing of key indicators such as refractoriness and strength

🎯 Professional technical services

Hubei Zhongnai New Materials professional team
• Recommend the most suitable grade according to the operating conditions
• Professional design and customization of special-shaped bricks
• Construction technology guidance and support
• Perfect pre-sales and after-sales service

📋 Complete product system

Multi-specification series products
• Full series of I, II, and III high-alumina bricks
• Corundum bricks (Al₂O₃>90%)
• Customized production of various special-shaped bricks
• One-stop supply of supporting refractory materials

🌍 International standard certification

Complies with multiple national standards
• Produced strictly in accordance with national standards
• Complies with international standards such as European standards
• ISO quality management system certification
• Export quality standard assurance

💡 Technological innovation advantages

Continuous technological improvement
• Continuous optimization and upgrading of formulas
• Innovation in special-shaped brick forming technology
• Precise control of firing process
• Hubei Zhongnai New Materials R&D strength