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Boiler Sand & Refractory Bed Material - High-Temp Stable For Boiler Fluidized Beds
Our Boiler Sand (also called Boiler Bed Material/Refractory Bed Material) is a core auxiliary material for fluidized bed boilers, crafted from high-purity alumina-silica aggregates (Al₂O₃ 42.52%, SiO₂ 51.50%). It features medium refractoriness (1660℃), optimized grain size (0.5-2.36mm), and low impurity content (CaO+MgO ≤0.75%, Na₂O+K₂O ≤0.69%), ensuring stable fluidization, wear resistance, and long service life in boiler beds. Suitable for circulating fluidized bed (CFB) boilers, industrial waste heat boilers, and biomass boilers, it solves the pain points of ordinary sand (easy sintering, short service life). Backed by CE certification, TüVRheinland verification, and 6000 tons monthly capacity, we offer factory-direct pricing ($240-$250/ton) and flexible packaging to meet global boiler operation demands.
Description
1. Product Overview
This boiler bed material is manufactured via precision processes: high-purity bauxite-silica ore crushing, graded screening (to control 0.5-2.36mm grain size), high-temperature calcination (1500-1600℃ to enhance stability), and impurity removal (reducing alkali metals and alkaline earth oxides). Unlike ordinary river sand or quartz sand, its alumina-silica composite structure forms a stable mullite phase during boiler operation, avoiding sintering or agglomeration at 800-1000℃ (typical CFB boiler bed temperature). The 0.5-2.36mm grain size range is optimized for fluidization-ensuring uniform air distribution in the boiler bed, preventing "dead zones" and reducing fan energy consumption. It's supplied as dry powder in 1-ton jumbo bags, ready for direct use in boiler bed filling or replacement.
2. Key Features
Excellent High-Temp Stability: Refractoriness 1660℃, maintaining particle integrity in 800-1000℃ CFB boiler beds without softening or sintering-service life 3× longer than ordinary sand (up to 18 months).
Optimized Fluidization Performance: 0.5-2.36mm uniform grain size + 1.2g/cm³ bulk density = ideal fluidization state, requiring lower air velocity (reducing fan power consumption by 15%) and avoiding particle segregation.
Low Impurity & Corrosion Resistance: CaO+MgO ≤0.75% (prevents low-melting-point slag formation), Na₂O+K₂O ≤0.69% (avoids alkali metal corrosion of boiler tubes); TiO₂ ≤1.82% (no harmful reactions with boiler fuel).
Strong Wear Resistance: Calcined alumina-silica structure has high hardness (Mohs hardness ≥6), resisting particle collision and bed material abrasion-reducing boiler bed material consumption to ≤0.5kg/h (for 100MW CFB boilers).
Cost-Effective & Easy to Use: Factory-direct price ($240-$250/ton) lower than imported bed materials; 1-ton jumbo bag packaging is easy to transport and load, no on-site processing required.
3. Technical Parameters
| Parameter | Specification |
|---|---|
| Main Composition | Al₂O₃ 42.52%, SiO₂ 51.50%, CaO+MgO ≤0.75%, Na₂O+K₂O ≤0.69%, TiO₂ 1.82% |
| Grain Size | 0.5-2.36mm (customizable to 0.3-3.0mm) |
| Refractoriness | 1660℃ |
| Bulk Density | 1.2g/cm³ |
| Melting Point | ≥1600℃ |
| Fluidization Air Velocity (Minimum) | 0.8-1.2m/s |
| Wear Rate (1000℃, 24h) | ≤0.3% |
| Moisture Content | ≤0.5% (dry basis) |
| MOQ | 1 ton (standard); 5 tons (grain size customization) |
4. Application Scenarios
Power Industry: Circulating Fluidized Bed (CFB) boilers (coal-fired, biomass-fired) – used as bed material to support fuel combustion, ensure uniform heat transfer, and protect boiler water walls.
Industrial Boilers: Waste heat boilers, waste incineration boilers – resisting corrosive flue gas and high-temperature ash, maintaining stable bed operation.
Heating Systems: Industrial heating boilers (e.g., in chemical plants, textile mills) – optimizing fluidization to improve heating efficiency and reduce energy consumption.
Boiler Maintenance: Replacement of aged or sintered bed material in existing boilers – restoring fluidization performance and extending boiler operation cycle.
5. Service & Support
Customization Service: Supports grain size customization (0.3-3.0mm) based on boiler type (e.g., 0.3-1.0mm for small CFB boilers, 1.0-3.0mm for large industrial boilers) with MOQ 5 tons; 3 days to deliver custom-screened samples.
Pricing & Discounts: Standard price $240-$250/ton; $80 off for $1000+ orders; long-term bulk orders (≥50 tons) enjoy 3%-5% additional discounts.
Samples & Quality Assurance: Free 5kg samples provided (customer covers shipping); each batch undergoes 100% inspection (grain size distribution, chemical composition, bulk density) with test reports; 6-month quality warranty (replacement for sintering issues).
Delivery & Packaging: 1-50 tons shipped within 7 days (spot stock available), bulk orders (>50 tons) with negotiable lead time; standard packaging: 1-ton jumbo bags (with moisture-proof inner film); shipped via Qingdao/Tianjin ports (FOB/CIF terms available).
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