Fly Ash / Cenospheres / Microspheres

Cenospheres (microspheres) are fine, hollow spherical particles with an aluminosilicate wall, generated as a by-product of coal combustion in power plants. Their unique morphology combines low weight with high compressive strength. Technical parameters: • Bulk density: 0.30–0.45 g/cm³ • Particle density: 0.55–0.85 g/cm³ • Particle size: 10–350 µm (standard D50 ≈ 75 µm) • Compressive strength: 3 000–7 000 psi (fraction-dependent) • Working temperature: up to 1 200 °C • pH (10% slurry): 7–9 • Composition: SiO₂ 55–65%, Al₂O₃ 28–35%, Fe₂O₃ < 3%, balance CaO/MgO/K₂O Applications: • Construction and insulation materials: lightweight concrete mixes, thermal insulating plasters, lightweight partition panels • Oil & Gas industry: well-cementing compounds (API/ISO), buoyancy microspheres • Paints and coatings: density-reducing filler, improved thermal and acoustic insulation properties • Plastics: syntactic epoxy foams, laminates, low-density composites • Refractory materials and ceramics: insulating bricks, crucibles, industrial kiln linings • Cosmetics and personal care: microcapsules, INCI-listed fillers Supply and logistics: We supply certified cenosphere batches from Chinese power plants operating within our supplier network. Each batch is tested for particle size (laser diffraction), bulk density and chemical composition (XRF). Export packaging: 25 kg bags, 1 000 kg big-bags or bulk-in-container. Loading ports: Qingdao, Tianjin, Shanghai, Ningbo, Guangzhou, Shenzhen. MOQ: 5 MT. Certificates: COA, SGS/BV on request.