Name: Corundum Mullite Brick - China Corundum Mullite Brick Manufacturers Suppliers Factory - Luming New Materials
Brand: Luming
SKU: 280469747

A Precast Corundum mullite brick is a type of high-performance refractory material, primarily composed of corundum and mullite.They are formed through pre-casting, high-temperature sintering, or special processing, and possess excellent properties such as high-temperature resistance, corrosion resistance, and thermal shock stability. These bricks are widely used in various high-temperature industrial furnaces and kilns.It is prefabricated into complex shapes in the factory according to kiln lining design and construction requirements, and then directly installed at site.

Item		LM-GM68
Al₂O₃ ≥		68
Bulk Density, g/cm³ ≥		2.70
Cold Crushing strength, MPa ≥	110℃×24h	60
	1300℃×3h	80
Rupture Strength ,MPa ≥	110℃×24h	8
	1300℃×3h	10
Linear Variation after burning 1300℃×3h		±0.5

Production Process

The production of corundum mullite pre-cast bricks typically involves the following steps

Raw Material Preparation:

High-purity industrial alumina (corundum aggregate), kaolin, or silica (for mullite synthesis) are selected as raw materials.

Batching and Mixing

The raw materials are mixed evenly according to a specific ratio, with an appropriate amount of binder and water added.

Forming:

Shaped using friction brick presses, hydraulic presses, or high-pressure forming equipment to create prefabricated bricks or custom shapes.

Drying:

Natural or forced drying to remove moisture.

Firing:

The bricks are sintered in a high-temperature tunnel kiln, allowing the corundum and mullite crystals to fully develop and form a dense microstructure. The firing temperature is usually above 1600°C.

Quality Inspection:

Random sampling to test performance metrics, ensuring high dimensional accuracy and structural uniformity.

Main Performance Characteristics and Advantages:

The properties of corundum mullite precast bricks result from the superposition and synergy of the advantages of its two main components:

High Refractoriness and Refractoriness under load:

The melting point of corundum is 2050°C, mullite is 1850°C. The corundum mullite precast brick refractoriness is above 1750^oC,

Operating temperatures is 1600-1800°C.It has High-Temperature Resistance and Stability.

Excellent Thermal Shock Resistance:

They can withstand drastic temperature changes without cracking or spalling.

Good Corrosion Resistance

Strong resistance to acidic and neutral slag corrosion.

Excellent High Strength and Abrasion Resistance

Corundum is one of the hardest materials in nature, second only to diamond (Mohs hardness 9), giving the brick body extremely high mechanical strength at elevated temperatures and outstanding erosion and wear resistance. This is crucial for areas inside the kiln with severe airflow or frequent material movement.

Low Expansion Coefficient:

Relatively low thermal expansion coefficient, beneficial for masonry stability.

Good Volume Stability:

It is thoroughly fired at high temperatures, has a small linear change rate, and is not prone to shrinkage or expansion during use, maintaining the sealing and stability of the furnace structure.

Energy Efficiency and Cost-Effectiveness:

Low thermal conductivity reduces heat loss, and prefabricated forms simplify installation, lowering construction costs.

Environmental and Adaptability:

Suitable for various atmospheres (oxidizing or reducing) and customizable, can be customized into complex shapes for special structures.

Long service life:

superior durability compared with castables or standard bricks.

Quick installation:

no on-site casting or vibration, reduced construction time.

Stable quality:

prefabricated and fully fired in factory, with consistent performance.

Lower maintenance cost:

extended lining service life, fewer shutdowns.

Low creep and anti-spalling

High dimensional accuracy and aesthetic appearance.

Our Products

Applications

Corundum mullite prefabricated bricks are suitable for various high-temperature industrial equipment, particularly where direct flame contact or corrosive gases are present. Key applications include:

Metallurgical Industry:

1).Blast Furnaces: Blast Furnace Tuyere ,Blast Furnace Throat,iron runner,Lower Shaft of Blast Furnace, Blast Furnace Hearth, blast furnace tapholes,lining critical parts of blast furnaces.

2).Hot Blast Stoves: Checker bricks, burners, arches in high-temperature zones,lining critical parts of Hot Blast Stoves.

Metallurgical Industry:

3).Heating Furnaces, Heat Treatment Furnaces: Furnace roofs, burner bricks, skid rails, furnace doors.

4).Electric Furnace: furnace Roofs, steel ladle linings,Delta sections, electrode holes.

5).converters:linings.

Ceramics Industry:

ceramic sintering kilns, roller kilns, pusher kilns, shuttle kilns for electrical porcelain, and tunnel kiln linings.

Glass Industry:

Sidewall,Furnace Bottom Regenerator Checkerwork,Superstructure Wall, Flue Lining,Crown,etc,Melting Zone and Working Zone Key parts of glass melting kilns

Building Materials Industry:

Cement Rotary Kilns:Rotary Kiln Hood,Outlet,Kiln Hood Seal,Grate Cooler Hot Zone,Smoke Chamber ,Kiln Door Hood,Cooler Lining Tertiary Air Duct Damper,Preheater Drop Tube

Petrochemical Industry:

Carbon Black Reactors,Oil and Coal Gasifiers,Secondary Reformers in Ammonia Synthesis Plants,Ethylene Pyrolysis Cracking Furnaces,Heating Furnaces,Fluid Catalytic Cracking (FCC) Units

Non-ferrous Metals Industry:

Linings for copper, aluminum, magnesium, zinc and other melting furnaces.

Hazardous waste incinerators: 
high-temperature furnace lining, secondary combustion chamber, burner blocks,grates.

All delivered goods are packaged in strict compliance with the buyer's requirements as well as relevant national and industry standards.

Shaped products such as refractory bricks and precast blocks are typically packaged on wooden pallets, wrapped with stretch film for sealing, and secured with plastic-steel strapping.

Unshaped refractory materials are packaged in 25-50kg plastic bags, with additional outer protection using bulk bags.

Our company provides customized packaging solutions including containers, wooden cases, metal boxes, and moisture-proof marine packaging, fully compliant with both local regulations and corporate requirements in your market.

Quality Assurance Measures:

Actively implement the ISO9001 quality management system standard, establish and continuously improve a quality assurance system to ensure its effective operation and continuous improvement, and provide users with reliable quality assurance.

Hold technical special meetings to analyze technical requirements, develop technical solutions, and formulate process technical operating procedures through laboratory research and development, all based on the different product requirements of various users.

For each project, a dedicated project manager is assigned to lead a quality accountability team. The functions and responsibilities of each member of this team are clearly defined.

We implement strict quality control for material procurement. We compare offers from multiple suppliers and select raw materials from reputable, high-quality large and medium-sized enterprises.

Strict process requirements are enforced to fully leverage our company's comprehensive and mature quality control points. Non-conforming products are strictly prohibited from proceeding to the next stage, thereby implementing quality control throughout the entire production process.

Utilizing our company's existing inspection methods, we conduct regular quality checks. We thoroughly analyze any issues found, inspect quality fluctuations, analyze quality trends, and research and formulate measures for quality improvement. This ensures that the process quality remains in a controlled state at all times.

The fully automatic production line ensures that every batch of products is manufactured under consistent production conditions, guaranteeing stable product quality without fluctuations.

Each product batch undergoes synchronous system sampling and is tested for various indicators according to customer requirements. Only after passing the tests is it packaged and shipped.

For the stacking, storage, transportation, and warehousing of refractory materials, our company will strictly comply with the relevant requirements of national standards.We offer a comprehensive service

After-Sales Service Commitment:

We strictly adhere to all agreements signed with our clients and conscientiously accept the obligations therein.

We commit to delivering all supplied materials to the client's designated location within the specified timeframe. We also guarantee that all product physicochemical indicators will meet the buyer's requirements. If any material is found to be non-conforming upon inspection, we will unconditionally replace or refund it and bear all associated costs.

We will strictly comply with the technical requirements for all supplied products. Upon delivery, we will provide a genuine and credible "Product Quality Certificate," "Test Report," and "Product Usage Instructions." We are also willing to accept random sampling inspections of the products by the buyer.

For kilns constructed by our company, we are willing to provide detailed furnace drying curves.

Should any quality issues arise during use, we commit to a written response will be provided within 24 hours to assist in the investigation and analysis of the issues.

We commit to taking responsibility for any losses caused by defects in the goods provided during the warranty period.

Should a product fail due to improper use by the client during the warranty period, we will actively assist with replacement, charging only for the cost of the materials.

Even after the warranty period expires, our company will remain actively involved in assisting with the resolution of any issues that may arise.

Technical personnel will conduct regular quality feedback sessions to solicit suggestions for improvement and enhance service quality.