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Catalyst Porous Alumina Milling Media Beads Ceramic Grinding Balls

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Catalyst Porous Alumina Milling Media Beads Ceramic Grinding Balls

Name: Catalyst Porous Alumina Milling Media Beads Ceramic Grinding Balls
Brand: Zhongli
Price: 1 USD

Quality Catalyst Porous Alumina Milling Media Beads Ceramic Grinding Balls wholesale

Brand Name : Zhongli

Model Number : AGB-01

Certification : CE ISO

Place of Origin : China

MOQ : 1kg

Payment Terms : L/C,T/T,Western Union

Supply Ability : 40-200ton per month

Delivery Time : within 15 days

Packaging Details : plastic + barrel

Packing : 25kg/bag or customized

Compressive Strength : 2000MPa

Melting Point : 2050°C

Material : Alumina

Thermal Conductivity : 25W/mK

Chemical Resistance : High

Usage : Grinding and milling applications

Shape : Spherical

Size : 1mm-50mm

Density : 3.6g/cm3

Hardness : 9 Mohs

Abrasion Resistance : Excellent

Color : White

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Product Description

Catalyst Support Beads: Porous Alumina for Chemical Reactions

Catalysts play a pivotal role in chemical reactions, enhancing rates and selectivity to produce desired products efficiently. Among the various catalyst support materials available, porous alumina beads are gaining popularity due to their exceptional properties and versatility.

Understanding Porous Alumina Beads

Porous alumina beads are spherical ceramic materials characterized by their high porosity, thermal stability, and mechanical strength. These beads serve as support media for catalysts, providing a robust framework that enhances catalytic activity. The porosity of alumina beads allows for improved mass transfer efficiency, making them ideal for various chemical processes.

Key Properties of Porous Alumina Beads

High Surface Area: The porous nature of alumina beads offers a large surface area, crucial for maximizing the interaction between the catalyst and reactants.
Thermal Stability: Alumina beads can withstand high temperatures, making them suitable for reactions occurring at elevated temperatures.
Mechanical Strength: The beads exhibit excellent compressive strength, ensuring durability and longevity in industrial applications.
Chemical Resistance: Porous alumina beads resist corrosion and chemical attack, maintaining their integrity in harsh environments.

Applications of Porous Alumina Beads in Chemical Reactions

Porous alumina beads find applications in various industries due to their unique properties. Here are some of the key applications:

1. Petroleum Refining

In petroleum refining, porous alumina beads are used as catalyst support media in processes like hydrocracking and reforming. Their high surface area and thermal stability facilitate efficient conversion of hydrocarbons, enhancing yield and selectivity.

2. Environmental Catalysis

Alumina beads are employed in catalytic converters to reduce emissions from vehicles. Their ability to support catalysts like platinum and palladium helps in the effective conversion of toxic gases into less harmful substances.

3. Chemical Synthesis

In the synthesis of fine chemicals and pharmaceuticals, porous alumina beads act as catalyst carriers, promoting reactions such as oxidation, hydrogenation, and polymerization. Their chemical resistance ensures minimal contamination, resulting in high-purity products.

4. Membrane Technology

Porous alumina beads are also utilized in membrane technology for filtration and separation processes. Their controlled porosity allows for selective permeability, making them ideal for applications in water treatment and gas separation.

●Chemical Composition:

Composition	Al₂O₃	SIO₂	CaO+MgO	Fe₂O₃
Wt%	≥92	7 max	≤2	＜0.1

●Typical Properties:

Specific Gravity

g/cm³

Bulk Density kg/L

Hardness

Moh’s

Water Absorption

Self wearing loss %(24hrs)

Compression

Mpa

≥3.65

≥2.2

＜0.01

≤0.012

≥2000

● Sizes Φ:

Size(mm)	Size(mm)	Size(mm)	Size(mm)
0.5-1.0	6.0	20.0	70.0
1.0	8.0	25.0	80.0
2.0	10.0	30.0	90.0
3.0	13.0	40.0	100.0
4.0	15.0	50.0
5.0	18.0	60.0

1. Mechanical & Physical Properties

Property	Alumina (92%)	Alumina (99%)	Zirconia	Steel	Silica Sand
Density (g/cm³)	3.6	3.9	6.0	7.8	2.2
Hardness (Mohs/HV)	9 (~1,500 HV)	9 (~1,800 HV)	8.5	6-7	7
Wear Rate (g/ton)	10–50	5–20	1–5	100+	300+
Compressive Strength	2,000 MPa	2,500 MPa	2,200 MPa	500 MPa	Low

Key Takeaways:

99% Alumina offers 30% lower wear than 92% grade.
2–5x longer lifespan vs. steel in abrasive slurries.
Harder than zirconia but less tough (ideal for fine grinding).

2. Chemical & Thermal Resistance

Property	Alumina (99%)	Performance Impact
Chemical Inertness	Resists pH 1–14	Safe for acids/alkalis, pharmaceuticals.
Max Temperature	1,600°C	Stable in kilns, calcination.
Thermal Shock	Moderate	Avoid rapid quenching (>200°C/min).
Contamination Risk	None	Zero metal ions (critical for Li-ion batteries).

Vs. Competitors:

Beats steel in corrosion resistance.
Outperforms silica sand in wear & consistency.

3. Grinding Efficiency

Particle Size Reduction: Achieves sub-micron fineness (D50 < 1µm) in wet/dry mills.
Speed: Higher density (vs. silica) improves kinetic energy transfer.
Consistency: Uniform shape/size prevents clogging in bead mills.

Best For:

High-purity materials (e.g., ceramics, electronics powders).
Slurry processing (paints, dyes).

4. Industry-Specific Performance

Industry	Benefit of Alumina Balls
Mining	50% lower replacement cost vs. steel in ore grinding.
Pharma	FDA-compliant, no endotoxin release.
Batteries	Prevents Fe/Ni contamination in cathode materials.
Paints	Maintains color purity (no metal leaching).

5. Cost vs. Lifetime Analysis

Media Type	Cost per kg	Lifespan (hours)	Cost per Ton Ground
Alumina (92%)	$5–10	2,000–3,000	$0.50–1.00
Steel	$2–4	500–800	$2.00–4.00
Zirconia	$50–100	5,000+	$0.20–0.50

Trade-Off:

Alumina balances cost and performance – Ideal when zirconia is over-spec.

Performance Summary: Why Choose Alumina?

✅ Cost-Effective: 3x cheaper than zirconia for moderate abrasion.
✅ High-Purity: 99.9% Al₂O₃ for sensitive applications (e.g., pharma).
✅ Versatile: Works in ball/attritor/planetary mills.
✅ Low Maintenance: Non-corrosive, easy to clean.

Limitations:

Not for high-impact milling (e.g., hammer mills).
Thermal shock risk in rapid cooling applications.

Need Custom Alumina Balls?

We supply:

Sizes: 1mm–50mm (±0.01mm tolerance).
Grades: 92%, 95%, 99%, ZTA-composite.
Certifications: ISO 9001, RoHS, FDA (for pharma).

●Package:

25KG/woven bag,1000KG-1250KG for one pallet with shrink wrapped