Cyclone Underflow
Calciner underflow gypsum is a phosphogypsum which is a white or nearly white odourless crystalline solid. Phosphogypsum is a by-product of fertilizer production. The chemical formula for phosphogypsum is CaSO4.2H2O.
Calciner underflow grade gypsum is typically used as a desiccant to remove moisture where dry conditions are required and is also used as a soluble source of essential plant nutrients, calcium, and sulphur in the Agricultural industry.
The anhydrous form of calcium sulphate occurs naturally as anhydrite. Its chemical formula is: CaSO4.
PHYSICAL PROPERTIES
Form: Solid
Appearance: White
Odour: Odourless
Density: 1.185 g/cm3
Molecular Weight: 172.17 g/mol
Toxify: Non-toxic
pH: 4.0 – 6.0
Free moisture content: <1.0 %
Purity of gypsum species component: > 90 %
ELEMENTAL COMPOSITION
Relative oxides Weight percentage (%)
SiO2 0.364
TiO2 <0.01
Al2O3 0.115
Fe2O3 0.325
MgO 0.220
CaO 34.461
Na2O <0.018
K2O 0.034
P2O5 0.360
Cr2O3 <0.010
SO3 47.877
ZnO <0.010
Loss on ignition (LOI) 15.809
MINERAL SPECIES COMPOSITION
Mineral species Weight percentage (%)
Gypsum 83.5
Bassanite 16.5
PACKAGING
1000kg bulk bags
Tanker
SAFETY PRECAUTIONS
In case of skin contact, wash with soap and water.
Avoid contact with eyes-: In case of contact rinse eyes immediately with
plenty of water and seek medical attention.
Refer to the Safety Data Sheet for complete information.
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