CALCINED LIME

Calcined Lime (or calcium oxide, or burnt lime), is obtained by calcining(controlled heating-time and temperature) limestone at temperatures above 900°C. This highly reactive product is essential to many industrial processes.

CaO (Calcium Oxide) is the chemical formula of quick lime, which is also called as calcined lime, burnt lime and unslaked lime.These are white and in lumps and powder in form with CaO contents varying from 90% to 80% and it reacts with water and heat is generated.



IDENTIFICATION

Chemical name: Calcium oxide



Product name(s): Steel Grade-Large, Steel Grade-Large Rescreened, Steel Grade-Small,
Steel Grade-Small Rescreened, Water Grade-Small, Water Grade-Small
Rescreened, Mini Pebble, Rice, PCC Grade-Large Rescreened, PCC
Grade-Small Rescreened, Hi Cal Fines, Pulverized Lime, Pulverized
Lime

Formula: CaO

Molecular Weight 56.08

Material Uses • Food Industries
• Paper Industry
• Paint Industries
• pH Control
• Metallurgical Industries (Copper, Aluminum, Steel, Iron, etc).
• Glass Industry
• Sugar Industries
• Construction,
• White Wash
• Agriculture to improve acidic soils
• Pollution control
• Making Autoclaved Aerated concrete (AAC) Blocks.



Process High calcium quicklime readily reacts with water to form hydrated lime. The reaction is highly exothermic and the process is known as "slaking". The reaction is usually carried out in a "slaker" (a specially designed mixer) which, through a process of rigorous mixing, makes certain that all of the quicklime has come into intimate contact with water and no unreacted quicklime remains. From a general viewpoint the hydrated lime produced can be in the form of dry hydrate, putty slurry, or "milk of lime".



Quick Lime specifications - Quick Lime/Calcined Lime/Burnt Lime/ Calcium Oxide

Calcium Oxide
CaO
85% to 90%
80% – 85%
85% – 90%

Calcium Carbonate
CaCO3
3%
5%
2%

Magnesium Oxide
MgO
1 %
1%
1%

Acid Insoluble
SiO2
3%
5%
3%

Alumina
Al2O3
0.1 %
0.1 %
0.1 %

Iron
Fe2O3
0.1 %
0.1 %
0.1 %

Chloride
Cl
Traces
Traces
Traces

Moisture


Mesh
(BSS)
Lumps
Lumps
Powder (200 Mesh)