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DIATOMITE
Heat-insulating backfill based on modified diatomite (TIZ)
Diatomite intended for thermal insulation of the metal mirror in steel-pouring ladles during continuous casting of steel at metallurgical plants
Product specifications
The name of indicators
The values
Appearance
fractionated dark gray granules
Grain composition,%
Passage through the mesh No. 5,%, not less
Passage through the mesh No. 1,%, not less
fraction (1-5) mm
90
3
Bulk density, kg / m3
500-850
Mass fraction of moisture,% no more
0.3
Mass fraction of total carbon, (C),%, no more
5.0
Mass fraction of silicon oxide SiO2,%
80.0-95.0
Mass fraction of aluminum oxide Al2O3,% no more
6.0
Mass fraction of iron oxide Fe2O3,% no more
3.2
Total mass fraction of sodium and potassium oxides (Na2O + K2O),% no more
2.5
Melting point, 0С
1450-1600
Strength, MPa, not less
2.5
Burnt diatomite crumb
Product specifications
The name of indicators
The values
Particle size, mm
0-5
Chemical composition, %:
SiO2
Al2O3
Fe2O3
80.0 - 91.5
4.5-8.0
2.0-3.5
Moisture content, %
0.2-1.7
pH of the aqueous extract
6.4-7.9
Bulk density, kg / m3
500-650
Thermal conductivity, W / m * 0K
0.08-0.14
Refractory mixtures
Product specifications
Mass fraction of the component%
OSBG-1
OSBSH -7
A2O3, within,%
25-65
12-24
CaO, within,%
ten
twenty
Fe2O3, within,%
2.1-2.8
2.8-3.2
Thermal conductivity coefficient, W, / m * K, no more
0.20-0.35
0.35-0.55
Compressive strength, MPa, not less
6.5-15.0
4.5-11.0
Mass fraction of moisture,% no more
0.7
0.7
Change in linear dimensions,% at 1000 0С,%
0.2-0.6
0.2-0.6
Apparent density, kg / m3
Grain composition, fr. mm
0.6-1.2
0.8-1.4
0-5
0-5
Maximum operating temperature, 0С
1250-1650
1250-1650
Diatomite as a feed additive
Organoleptic and physical and chemical indicators
The name of indicators
Norm
Appearance
Metallomagnetic impurity content, mg / kg, no more - particles up to 2 mm - particles larger than 2 mm with sharp edges
beige-orange granules and powder
100 Not allowed
Moisture content, %
0.1-10.0
Bulk density, dry, kg / m3
550-850
Sieve residue with mesh No. 1.2, no more
5%
True density, g / cm3
1.5-2.4
Silicon oxide content,%
80-90
pH of the aqueous extract
6.0-7.5
The presence of pathogenic microflora
Not allowed
Toxicological indicators
The name of indicators
The values
Mass fraction of cadmium, mg / kg, no more
5.0
Mass fraction of lead, mg / kg, no more
30.0
Mass fraction of mercury, mg / kg, no more
0.2
Mass fraction of arsenic, mg / kg, no more
12.0
Mass fraction of fluorine, mg / kg, no more
2000.0
Content of radionuclides, Bq / kg, no more
- strontium-90
- cesium-137
150
750
One of the main differences between diatomite and conventional filters is that it is able to remove not only suspended matter from water, but also purifies water from harmful substances dissolved in it, as well as from fine particles.
Diatomite is an aluminosilicate with a skeletal structure that contains voids occupied by water molecules and large ions. Due to their free movement, ion exchange and reversible dehydration occur. In terms of the combination of useful properties, diatomite is in the lead, showing excellent sorption, molecular sieve, selective ion-exchange catalytic properties.
The diatomite particle size and open structure allow it to work effectively as a filter material in a variety of applications. The pores within and between the shells of diatoms are small enough to absorb bacteria, clay particles, and other suspended solids. Diatomite is used in the production of drinking water, in the purification of water in swimming pools, in brewing, winemaking, in chemical plants.
Product specifications
The name of indicators
The values
Particle size, mm
40 - 80 micron
Moisture content, %
0.2-1.7
pH of the aqueous extract
6.4-7.9
Bulk density, kg / m3
500-650
Thermal conductivity, W / m * 0K
0.08-0.14
Chemical composition, %:
SiO2
Al2O3
Fe2O3
80.0 - 91.5
4.5-8.0
2.0-3.5
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