Quicklime is also known as burnt lime and is manufactured by heating crushed and sorted limestone in a rotary or shaft kiln. Lmestone (CaCO3) is broken down to form quicklime (CaO) and carbon dioxide (CO2). It is then subjected to calcinations in a kiln where it is heated to very high temperature, approximately 1100 degrees Celsius. The high temperatures release carbon dioxide (CO2) from the stone, turning it into calcium oxide. The process takes about 24-36 hours. When the quicklime comes out of the kiln it is in lumps, grains and powder form. It is finally packaged for sale.
However, if it comes into contact with water, it reacts violently and gives off heat to convert it into slaked lime.
Chemical properties of Quick Lime Lumps
Calcium Oxide (Cao)
Calcium Carbonate (CaCo3)
Acid Insoluble As (SiO)2
Alumina Oxide (AL2O3)
Iron Oxide (Fe2o3)
2" - 4"
Uses of Quick Lime Lumps
• It is used in the manufacture of slaked or hydrated lime. • It is used in the cement manufacturing process. • It is used as a water detector in the petroleum industry. • It is used in the manufacturing of paper to regenerate sodium hydroxide to sodium carbonate. • It is used as poultry feed and in pharmaceutical applications. • It is used in glass manufacturing and steel processing. • It is used as acid neutralization and in water purification process. • It is used in the manufacture of bleaching powder and fly ash bricks. • It is used in upgrading processes of sulphide ore and in making paper pulp.