Raw flakesExfoliated gradeCustom screening
Expanded Vermiculite (Silver & Golden)
Premium Ultra-Lightweight Mineral for Professional Horticulture & High-Temperature Refractory Insulation. Directly sourced and exfoliated in Lingshou mineral base. Completely asbestos-free, pH neutral, sterile, with superior water retention and thermal barrier properties.
Key Technical Highlights
- Available Grades: Raw Flakes & Exfoliated Horticultural / Industrial Grades
- Particle Sizes: 1-3mm, 2-4mm, 3-6mm, 4-8mm (Custom screening available)
- Bulk Density: 80 – 140 kg/m³ (Extremely lightweight for soil aeration and safe transit)
- Thermal Limit: Fire resistance up to 1200°C; non-combustible A1 rating
Available Mesh Sizes & Grades
| Grade | Particle Size | Typical Applications |
|---|---|---|
| Grade 2 (Fine) | 1 – 3 mm | Seed germination, soil mixing, lightweight concrete |
| Grade 3 (Medium) | 2 – 4 mm | Greenhouse horticulture, hydroponics substrate |
| Grade 4 (Coarse) | 3 – 6 mm | Refractory boards, loose-fill thermal insulation |
Technical Data Sheet (TDS)
| Property | Specification Value |
|---|---|
| Bulk Density | 80 – 130 kg/m³ |
| Thermal Conductivity | 0.045 – 0.065 W/(m·K) |
| Refractoriness | 1200 – 1300 °C |
| Moisture Absorption | 250% – 350% |
| pH Value | 6.5 – 7.5 (Neutral) |
| Asbestos Content | 0% (Certified Asbestos-Free) |
Key Industrial Applications
- Horticultural Substrates & Hydroponics: Moisture-retaining aeration agent for potting soils.
- High-Temperature Insulation: Fireproof boards, chimney lining, and molten metal insulation.
- Brake Friction & Packaging: Hazardous liquid absorption and friction material filler.
Technical Specifications
| Property | Testing Standard | Specification / Value |
|---|---|---|
| Appearance | Visual | Golden / Silver Flakes or Granules |
| pH Value | ASTM D4972 | 6.8 – 8.2 (Neutral) |
| Water Absorption Capacity | Gravimetric | 200% – 350% by volume |
| Melting Point | Pyrometric | 1300°C – 1350°C |
Packaging & Shipping
Packaging25 kg multi-wall paper bags with PE inner liner, or 1000 kg FIBC jumbo bags.
LoadingPalletized with heat-treated wooden pallets (ISPM 15 compliant) & shrink wrap.
Shipping ReferenceApprox. 30-35 m³ per 40HQ container (Volumetric Loading).