Premium quality cenospheres for riser sleeves

Our cenospheres are hollow, alumino-silicate microspheres derived from high-quality fly ash. With their low density, high strength, and excellent thermal insulation properties, they are the ideal lightweight filler for riser sleeves used in steel and iron casting.

When incorporated into riser sleeve formulations, cenospheres:

• 🔥 Reduce thermal conductivity, helping retain heat in the molten metal for longer periods

• ⚙️ Improve sleeve performance by enhancing insulating and/or exothermic characteristics

• ⚖️ Lower bulk density of the sleeve material, reducing overall sleeve weight and shipping costs

• 💰 Reduce material consumption by partially replacing expensive refractory components

Typical Properties:

• Bulk Density: 0.35–0.45 g/cm³

• True Particle Density: ＜1.0 g/cm³

• Particle Size: 40# (custom grades available)

• Composition: SiO₂, Al₂O₃

• MeltingPoint: >1200°C

These cenospheres are chemically stable, easy to handle, and compatible with both insulating and exothermic sleeve systems. We supply consistent, industrial-scale quantities to foundries, refractory manufacturers, and sleeve producers worldwide.

Applications:

• Riser sleeves for steel, ductile iron, and gray iron castings

• Insulating and exothermic sleeve formulations

• General high-temperature insulating refractory systems

📦 Packaging: Available in jumbo bags or 25 kg sacks. Custom packaging upon request.

📞 Contact us today to request a sample, datasheet, or custom technical support.

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jenny@kehuitrade.com