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Diatomaceous Earth forms by the accumulation of the amorphous silica (opal , SiO2, nH2O) remains of dead diatoms (microscopic single – celled algae) in lacustrine or marine sediments. The fossil remains consist of a pair of symmetrical shells or frustules. Diatomaceous Earth is very soft, siliceous sedimentary rock that is easily crumbled into a fine white to off-white powder. It has a particle size ranging from less than 3 micrometer to more than 1 mm, but typically 10 20 200 micrometers. This powder can have an abrasive feel, similar to pumice powder, and is very light as a result of its high porosity. The typical chemical composition of oven – dried diatomaceous earth is 80 to 90 % silica, with 2 -4 % alumina and 0.5 to 2 % iron oxide.
TYPICAL PHYSICAL ANALYSIS:
Sr. No. Particulars Result
1 Appearance Pale Yellow/ Off white Powder
2 Odour None
3 Fineness 92-95%
4 Moisture 8-10%
5 Water absorption 110 %
6 Bulk Density 0.43 gm/ml
7 pH(10% slurry) 7.5 to 8.4
8 L.O.I 6 – 8%
TYPICAL CHEMICAL COMPOSITION:
Sr. No. Particulars Results (%)
1 SiO2 80-84
2 Al2O3 4-6
3 Fe2O3 0.5-2
4 TiO2 00.27
5 CaO 00.23
6 MgO 00.81
7 Na2O 1.27
8 K2O 00.18
9 P2O5 00.09
10 MnO NIL
NOTE: All grades and sizes available and also calcined flux DIATOMACEOUS is available.
APPLICATIONS:
PEST CONTROL
USE IN AGRICULTURE
FILTRATION
ABRASIVE
ABSORBENT
THERMAL
HYDROPONICS
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