Key Characteristics & Advantages

Our Dense Brown Fused Alumina stands out through several critical advantages:

High Bulk Density
Through optimized crystal structure and particle size distribution, we achieve a remarkable bulk density of 1.95 - 2.10 g/cm³ - significantly exceeding the 1.75-1.85 g/cm³ of conventional brown fused alumina. This translates to a higher volume filling rate for our customers, meaning more aggregate per unit volume that significantly reduces binder consumption, lowers overall product costs, and increases final product density.

Low Porosity & High Mechanical Strength
The dense internal particle structure with low apparent porosity provides exceptional load-bearing capacity. This results in refractory products and abrasive tools with superior compressive and flexural strength, offering enhanced wear and impact resistance for dramatically extended service life.

Excellent Corrosion Resistance
The dense microstructure effectively blocks penetration and erosion from molten slag and metal. This property particularly benefits applications in areas subjected to severe washing by molten materials, such as ladles and iron troughs, where it significantly improves corrosion resistance and extends liner life.

Superior Thermal Shock Stability
The combination of low thermal expansion coefficient with high thermal conductivity provides outstanding resistance to thermal spalling. This enables our material to withstand frequent kiln start-ups/shutdowns and rapid temperature changes without cracking or spalling.

Typical Applications

Our Dense Brown Fused Alumina serves critical roles across multiple industries:

High-End Refractories
Recommended grit sizes: F8 - F30 (Aggregate), F100 - F320 (Fine Powder)
Ideal for monolithic refractories in large ladles, blast furnace trough castables, and slag runner mixes. The high-density aggregate creates a denser refractory matrix that delivers excellent resistance to washing, penetration, and corrosion, significantly extending service life in demanding environments.

High-Efficiency Heavy-Duty Abrasive Tools
Recommended grit sizes: F16 - F60
Perfect for manufacturing heavy-duty resin-bonded grinding wheels and cutting discs. The high packing density creates stronger wheels that maintain their profile better during grinding operations, resulting in higher efficiency and longer operational life.

Wear-Resistant Engineering & Surface Treatment
Recommended grit sizes: F16 - F50
Serves as superior wear-resistant aggregate for industrial floorings, protective coatings, and blast cleaning abrasives. The dense grains provide exceptional wear resistance in these demanding applications.

Precision Casting
Recommended grit sizes: F30 - F100
Functions excellently as filler and facing sand in investment casting processes, where it contributes to achieving smoother, higher-quality casting surfaces.

Product Specifications

Chemical Composition

• Al₂O₃: ≥ 95.0%

• TiO₂: 1.5% - 3.0%

• SiO₂: ≤ 1.5%

• Fe₂O₃: ≤ 0.8%
  (Test Method: XRF Spectrometry)

Physical Properties

• Bulk Density: ≥1.95 g/cm³ (Core Indicator, tested per GB/T 2999-2016)

• Apparent Porosity: ≤ 3% (Tested per GB/T 2999-2016)

• Mohs Hardness: 8.9

• Magnetic Content: ≤ 300 ppm (Tested by Magnetic Separation)

Grit Size Availability
We offer a complete range of grit sizes strictly following FEPA International Standard (FEPA 42-1:2006), including:

• Coarse Aggregate: F8, F12, F14, F16, F20, F24, F30, F36

• Fine Grains: F40, F46, F54, F60, F70, F80, F90, F100, and beyond

Our Technological Edge: Achieving Superior Density

Henan YUMO employs advanced technologies to achieve exceptional product density:

Precision Raw Material Selection & Formula Optimization
We use specifically graded high-quality bauxite and optimized reducing agent ratios to establish the foundation for a high-density crystal structure.

Advanced Melting Process Control
Our precisely controlled melting temperature curves and cooling rates in arc furnaces promote dense crystal growth while minimizing internal pore formation.

Particle Morphology Enhancement
Specialized crushing and shaping processes produce grains with higher sphericity and smoother surfaces, significantly reducing inter-particle voids.

Scientific Grading Technology
By applying the theory of closest packing, we precisely proportion particles of different sizes, enabling fine grains to completely fill voids between coarse grains for optimal packing density.

Why Choose Henan YUMO?

Performance Enhancement Solution
Our high bulk density products deliver transformative improvements to your high-end refractory products and efficient abrasive tools, providing a competitive edge in demanding applications.

Cost Efficiency Expertise
While slightly higher in unit price, our products reduce binder consumption, extend product lifespan, and lower overall operational costs, delivering superior total cost of ownership.

Customized Grading Solutions
We provide tailored particle size combinations based on your specific product formulas and process requirements, helping you maximize the benefits of high-density materials.

Consistent Quality Assurance
Our rigorous quality control processes from raw materials to finished products ensure batch-to-batch consistency in both chemical composition and physical properties.

Henan YUMO New Materials — Solidifying the foundation for high performance with innovative material technology.
If you are seeking a breakthrough in the performance of refractory materials or abrasive tools, Dense Brown Fused Alumina is your ideal choice!

Contact us now for free samples and customized grading solutions!