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China Vermiculite Suppliers: High-Quality Exfoliated A3 Grade Vermiculite from Leading Factory in Shanxi & Hebei
Product Description
Crude Vermiculite consists of thin, flat flakes containing microscopic layers of water. Exfoliation on being subjected suddenly to high temperatures (700°C to 1000°C) vermiculite flakes will expand to many times due to the microscopic layers of water turning to steam and forcing the laminar layers apart.
Exfoliated vermiculite, as insulation, sometimes treated with a water repellent, is used to fill pores and cavities in masonry construction and hollow blockwork to enhance acoustic properties, fire rating and insulation performance. Exfoliated vermiculite can also be used to produce refractory and insulation concretes and mortars, and to make high-temperature binders for construction materials, gaskets, specialty papers, textiles and vehicle brake linings.
Finer grades of exfoliated vermiculite can be used to produce various shapes of insulation pellets, high-temperature insulation, as a primary component in cementitious coatings, and as a filler in inks, paints, plastics and other materials.
Vermiculite can absorb liquids such as fertilizers, herbicides and insecticides, which can then be transported as free-flowing solids. It is used in the fertilizer and pesticide markets because of its ability to act as a bulking agent, carrier and extender. In horticulture, exfoliated vermiculite improves soil aeration and moisture retention, and when mixed with peat or other composted materials, such as pine bark, vermiculite produces a good growing medium for plants. As a soil conditioner, exfoliated vermiculite improves aeration in clay-rich soils and water retention in sandy soils, while reducing the likelihood of compaction, cracking and crusting of the soil.
Specification
| Parameter | Details |
|---|---|
| Type | Crude Vermiculite & Exfoliated Vermiculite |
| Size | 0.2-0.7mm, 0.3-1mm, 0.5-1.5mm, 0.7-2mm, 1.4-4mm, 2.5-5mm, 2.8-8mm |
| Loose Bulk Density | 90-240 kg/m³ |
| Melting Point | 950 - 1350 ℃ |
| Moisture | 2-12% |
| pH | 7-9 |
Chemical Composition
| Compound | Percentage (%) |
|---|---|
| SiO2 | 38-46% |
| Al2O3 | 7-9% |
| Fe2O3 | 4-20% |
| MgO | 22-36% |
| CaO | 2.0-3.5% |
| K2O | 2.1-4.6% |
| TiO2 | 0.2-1.5% |
Applications
- ✓ Soilless growing medium vermiculite
- ✓ Seed germination vermiculite
- ✓ Coating vermiculite
- ✓ Brake linings Vermiculite
- ✓ Roof and floor screeds and insulating concretes vermiculite
- ✓ Packing material vermiculiteA
- ✓ Lightweight aggregate for plaster vermiculite
- ✓ Fireproof wallboard vermiculite
- ✓ Hot topping vermiculite: crude vermiculite have been used for hot topping in the steel industry.
Packing & Quantity
Packing Options: Available in 50kg, 1,000kg, 1,100kg, and 1,200kg bags.
Loading Capacity: 20-26 Metric Tons per 20’GP container.
Frequently Asked Questions (FAQ)
Q
What is Crude Vermiculite and how does it expand?
Crude Vermiculite consists of thin, flat flakes containing microscopic layers of water. When subjected to sudden high temperatures ranging from 700°C to 1000°C, the water layers turn to steam, forcing the laminar layers apart and causing the flakes to expand to many times their original size.
Q
What are the insulation and construction applications of exfoliated vermiculite?
Exfoliated vermiculite is widely used to fill pores and cavities in masonry construction and hollow blockwork to improve acoustic properties, fire ratings, and thermal insulation. It is also utilized in producing refractory and insulation concretes, mortars, high-temperature binders, gaskets, specialty papers, textiles, and vehicle brake linings.
Q
How does vermiculite benefit horticultural applications and soil conditioning?
In horticulture, it improves soil aeration and moisture retention. When mixed with organic materials like peat or pine bark, it forms an excellent growing medium. As a soil conditioner, it enhances aeration in clay-rich soils and improves water retention in sandy soils while preventing soil compaction, cracking, and crusting.
Q
Can vermiculite be used as a carrier for agricultural chemicals?
Yes, vermiculite has a high capacity to absorb liquids such as fertilizers, herbicides, and insecticides. This allows them to be easily transported and distributed as free-flowing solids, making it a highly effective carrier, bulking agent, and extender.
Q
What are the standard packaging options and loading quantities?
Our vermiculite is packed in 50kg, 1,000kg, 1,100kg, and 1,200kg bags. The typical loading quantity per 20’GP container ranges between 20 to 26 Metric Tons (Mt).