China Diatomaceous Earth 50 Lb
China Diatomaceous Earth 50 lb
Diatomaceous earth is a naturally occurring sedimentary rock formed from the fossilized silica shells of microscopic algae called diatoms. When mined and processed, it yields a porous, low‑density powder composed primarily of amorphous silicon dioxide (SiO₂) with trace amounts of alumina, iron oxide, and moisture.
Typical Technical Properties
| Property | Typical Value |
|---|---|
| Silicon Dioxide (SiO₂) Content | 85‑92 % |
| Moisture (Loss on Drying) | ≤5 % |
| Bulk Density | 0.30‑0.45 g/cm³ (loose) |
| Particle Size (D50) | 10‑25 µm |
| pH (10% slurry) | 7‑9 |
Manufacturing Considerations
Raw material is extracted from selected quarries in China, crushed, and then subjected to a controlled calcination process that removes organic matter while preserving the siliceous microstructure. The product is milled to achieve a consistent particle size distribution and finally passed through magnetic separators to eliminate ferrous contaminants.
No chemical additives are introduced during processing, which maintains the inert nature of the powder and ensures compatibility with food‑grade, pharmaceutical, and industrial applications where purity is critical.
Key Industrial Applications
Filtration: The high porosity and uniform pore structure make it effective as a filter aid for liquids such as beer, wine, syrups, and industrial oils, where it forms a permeable cake that captures fine particulates without significantly increasing pressure drop.
Absorbent Spill Control: Its ability to absorb up to 1.5 times its weight in liquids enables rapid containment of oil, coolant, or chemical spills on factory floors, reducing slip hazards and facilitating clean‑up.
Carrier and Anti‑Caking Agent: In powdered formulations, diatomaceous earth prevents agglomeration by coating particles and reducing inter‑particle friction, improving flowability in agricultural chemicals, powdered detergents, and animal feed premixes.
Mild Abrasive: The mild hardness (Mohs ≈ 5‑6) provides a gentle polishing action suitable for metal cleaning compounds, toothpaste formulations, and industrial polishing pastes where surface finish must be preserved.
Quality Control Philosophy
Each batch undergoes sieve analysis to verify particle size distribution, loss‑on‑drying testing for moisture control, and inductively coupled plasma (ICP) spectroscopy to confirm silica content and trace element limits. Results are recorded against internal specifications that align with ASTM C618 and ISO 12462 standards for filter aids.
Visual inspection for color consistency and foreign material is performed on every lot before packaging. Any deviation triggers a hold and root‑cause investigation to prevent shipment of off‑spec material.
Packaging and Handling
The product is supplied in 50 lb (≈22.7 kg) multi‑wall polypropylene bags with an inner polyethylene liner to protect against moisture ingress during transit and storage. Bags are palletized, stretch‑wrapped, and labeled with lot number, net weight, and safety information.
Store in a dry, well‑ventilated area away from direct sunlight. Although the material is non‑hazardous, use of dust masks and safety glasses is recommended during handling to minimize respiratory exposure to fine particles.
Frequently Asked Questions
- Can the particle size be adjusted for specific filtration requirements?
- What testing documentation is available with each shipment?
- Are there options for custom branding or private labeling on the bags?
- What is the typical lead time for a 50 lb bag order from China?
For detailed technical data sheets, sample requests, or to discuss custom specifications, please contact our sales team.
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