Day: July 16, 2020

MOISTURE – maximum content (0.50 %)

In order to precondition the material properly, Limestone is dried.

SULPHUR – maximum content (0.05%)

Presence of Sulphur should be lower than 0.1% for the limestone to be dense, massive and non-fretting on burning. We have less than 0.05%.

PHOSPHORUS – maximum content (0.05%)

The high amount of Phosphorus (P₄) causes lime to become embrittled, thus reducing the toughness.

IRON OXIDE – maximum content (0.20%)

Iron Oxide is a chemical compound found in rocks and minerals including limestone. The presence of Fe₂O₃ remains at its maximum of 0.20%.

ALUMINIUM OXIDE – maximum content (0.30%)

Aluminium Oxide is a white, colourless, odourless and insoluble crystalline substance. It is diminished to maximum 0.30% in the limestone composition.

SILICON DIOXIDE – maximum content (1.00%)

Limestone rock contains crystalline Silicon Dioxide (SiO₂) in different quantities.

MAGNESIUM OXIDE – maximum content (1.20%)

Magnesium Oxide is found in the standard composition of Limestone. The presence of MgO is maintained at a maximum level of 1.20%.

CALCIUM OXIDE – minimum content (53.50%)

Calcium Oxide is a widely used alkali substance known as quicklime, burnt lime or calcia. The Presence of CaO ranges from minimum of 53.50%.