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Diatomite

Diatom lands are derived from sedimentary lake regions. They are composed of microscopic unicellular algae shells and skeletons that are rich in silica. The diatom algae live on land or on humid rocks in lakes and oceans. For this reason, its physical structure and its abundance are related to climatic conditions and water quality.

 

The applications of diatomite depend on the size and structure of the shells, which varies according to the region from where they are extracted. Treatment can also influence its applications.

 

The most common uses are as:

 

  • A filtration auxiliary or supporter
  • A thermal and acoustic insulation;
  • A filler in many products;
  • An absorbent of liquids and gases;
  • Construction material in mortar mixes, cement or concrete;
  • An abrasive.

 

Technical Information

Filtering Diatomite
Physical Characteristics

Physical Aspect: a fine, clear-colored powder (colors may be white, pink, beige or gray), odorless and free of foreign materials.


TYPE Unit M45 M4D
Permeability darcy 1,0 – 2,0 0,2 – 0,4
150 Mesh Retention % 5,0 – 10,0 1,0 – 5,0
Apparent Density g/l 280 - 360 330 - 400
Humidity % ≤ 1,0 ≤ 1,0
pH (sol. 5%)
8,0 – 10,5 6,0 – 8,0

Chemical Characteristics

SiO2 (%) Al2O3 (%) Fe2O3 (%) Na2O (%) Mg0 (%) CaO (%) K2O (%)
≥ 88,0 3,5 – 7,0 1,0 – 2,5 2,5 – 4,5 ≤ 0,5 ≤ 0,7 ≤ 0,3

Applications

M45 Filtering auxiliary (precapa), syrups, oils, viscous chemicals, sugar, gelatin, beers, wine.
M4D Filtering auxiliary (precapa and Body Feed), syrups, oils, viscous chemicals, sugar, gelatin and leavening, liquid sulfur.

Filling Diatomite (Special Charges)
Physical and Chemical Properties

PROPERTIES UNIT M1D M2D M2
SiO2 (%) 89,00 – 94,00 89,00 – 94,00 89,00 – 94,00
Humidity (%) ≤ 3,0 ≤ 1,0 ≤ 1,0
Apparent Density g/cm3 330 - 400 300 - 400 280 - 320
Residual # 325 (%)   4,0 – 14,0  
Residual # 200 (%) ≤ 8,0    
Residual # 100 (%)     ≤ 1,0
pH (5%)   6,0 – 9,0 7,0 – 10,5 7,0 – 10,5
Color   Gray - Beige Gray - Beige Gray - Beige