Diatomite

We can customize the particle sizes according to customer’s requirements .

1.Product Introduction

Appearance: White, off-white, light yellow or light grayish-brown powder; lightweight and soft, with a Mohs hardness of only 1～1.5. Porous structure (core advantage): Porosity of 80%～90% with abundant nano-sized micropores; large specific surface area, and water absorption capacity reaching 2～4 times its own weight. Density: True density 1.9～2.3 g/cm³; extremely low bulk density: 0.34～0.65 g/cm³. Thermal properties: Melting point 1650～1750 ℃, featuring heat insulation, non-combustibility and sound insulation. Chemical stability: Resistant to most strong acids; soluble only in hydrofluoric acid and strong alkalis; chemically inert at ambient temperature. Safety: Purified food-grade product is non-toxic. Raw ore and roughly calcined products contain trace free silica dust. Dust protection is required for long-term inhalation exposure.

Three Major Processed Grades (Common Industrial Classification)

Natural Raw Diatomite The ore is only crushed, ground and dried, retaining organic matter. It boasts strong adsorption capacity, widely used as adsorbent, soil conditioner and filler.

Calcined Diatomite (600～900℃) Organic matter is removed at high temperature to unblock pores; the product tends to be pinkish. It is mainly applied as general filter aid and adsorbent for water treatment.

Flux-Calcined Diatomite (flux such as soda ash added, 900～1100℃) Moderate sintering of diatom frustules greatly improves permeability; pure white in color. It is the mainstream raw material for food-grade filtration (beer, edible oil, beverages).

2. Technical Data Sheet

3. Main Application Fields

1) Filter Aid (Largest Global Application)

Forms loose filter cakes to trap fine suspended solids as small as 0.1 μm

·         Food industry: Clarification of beer, wine, fruit juice, syrup, edible oil and condiments;

·         Pharmaceutical industry: Filtration of oral liquids and antibiotic solutions;

·         Industrial sector: Lubricating oil, cutting fluid, electroplating solution, swimming pool water and industrial wastewater purification.

2)Functional Filler

Used in coatings, rubber, plastics, papermaking and asphalt pavement materials. It delivers matting, wear resistance, anti-aging and oil absorption effects while cutting costs.

3)Adsorption Material

Adsorbs heavy metals and organic pollutants in industrial wastewater; exhaust deodorization; desiccants; catalyst carriers.

4) Building Materials

Core raw material of diatom mud; thermal insulation refractory bricks and heat-insulating boards with humidity regulation and sound absorption performance.

5) Agriculture & Daily Chemicals

Soil conditioner, fertilizer carrier; physical insect repellent powder; oil-absorbing powder for cosmetics (oil-absorbing paper, loose powder raw material).