Precipitated Calcium Carbonate(PCC)
Introduction
Indian company, providing technical, engineering, marketing and management consultancy, offers the technology of precipitated calcium carbonate (PCC).
The process of production of PCC can be divided into four sub-processes:
Generation of producer gas
The coke is burnt in presence of steam for its conversion into producer gas. the generator is a fully integrated unit having a water cooling jacket around it and a rotary ash removal system at the bottom. Alternate fuels could be LNG, LPG, LDO or F.O.
Calcination process
As suitable grade of limestone is calcined into a vertical shaft kiln using liquid or gaseous fuel. The process is endothermic and the following reaction takes place - CaCO3-----------------CaO+CO2
Slaking process
The quicklime is hydrolysed into slaked lime slurry with water in a reactor equipped with a turbine type agitator. The chemical reaction which takes place is - CaO+H2O-----------------------Ca(OH)2
Carbonation process
The hydrated lime slurry is fed to the carbonation tank provided with mechanical stirrers. Pure CO2 is bubbled through this slurry to obtain PCC which is subsequently dried and sent for packaging.
Areas of Application
Manufacture of rubber, plastics, paper, paints, dentifrices, ceramics, putty, polishes, insecticides, inks, shoe dressing
In food, cosmetics, pharmaceuticals, antibiotics
As filter in production of adhesives, matches, pencils, crayons, linoleum, insulating compounds, welding rods, removing acidity of wines
Advantages
The process technology offered guarantees the product quality as characterised by the particle size of the product which is critically controlled at each process step by step maintaining precise condition of concentration, temperature, pH and other physical conditions
The process is environment friendly and does not emnate toxic pollutants
Production Capacity
20 TPD to 6,000 TPA
Inputs Required
| Building | 1,500 sq. m |
| Land | 4,000 sq. M |
| Water | 20 cu.m/day |
| Power/fuel | 350 KW or 400 KVA |
| Other utilities | Steam, 3TPH |
Manpower Required
| Skilled | 13 |
| Unskilled | 14 |
| Total | 27 |
Raw materials
8,000 TPA of limestone, high grade CaO greater than equal to 55.50 %- free from Fe, Mn, Co, etc.
Development Status
Commercialised
Transfer Forms
Know-how, equipment, turnkey plant, training, technical assistance, consultancy
For further information please contact
Asian and Pacific Centre for Transfer of Technology
P O Box 4575
Qutab Institutional Area
New Delhi - 110 016, India
Tel : +91-(0)11-6856276
Fax : +91-(0)11-6856274
Email: rvijh@apctt.org
