The Precipitated Calcium
Carbonate Plant offered by us is made by following steps:
- Calcination / Burning of limestone in a vertical shaft lime
kiln to give quick lime and carbon dioxide gas.
- Hydration of quick lime to give hydrated lime.
- Washing and cooling of carbon dioxide gas.
- Reaction of hydrated lime with CO2 gas to give desired grade
of precipitated calcium carbonate slurry.
The raw lime stone is first screened & washed to remove
undesized material and then it is fed to the vertical shaft lime
kiln for preheating, calcinations & cooling operation. Here
process is controlled automatically and quick lime & CO2 gas are
obtained. Then quick lime is hydrated with process water in batch
reactor and screened to remove lime impurity. The line slurry is
then further processed to reach at designed process conditions,
required in reactor for carbonation. The CO2 gas from lime kiln is
cooled and washed in a vertical washer and then it is charged to the
batch reactor. The required conditions are maintained in reactor to
obtain different grade of precipitated calcium carbonate. This
slurry is further washed, filtered and dried to get fine powder of
precipitated calcium carbonate.
It is used as filler & coating pigment for premium quality
paper products. PCC improves optical properties and print
characterized of paper products, improves paper machine productivity
& reduces paper making costs through the replacement of more
expensive Pulp fiber & optical brightening agent.
PCC also finds many industrial uses, based on the ability to
achieve small particle size and special crystal shapes. In rigid
PVC, such as vinyl siding and fencing, PCC increases impact
strength, with some of the smaller parcticles able to replace
expensive impact modifiers. Nano PCCs (less than 0.1 micron in size)
control viscosity and sag in automotive and construction sealants,
such as PVC plastisols, polysulfides, urethanes and silicones. In
paint, PCC?s unique particle shapes improve hiding and allow
reductions in titanium dioxide levels.
An Effective acid neutralizer, PCC is often used in calcium-based
antacid tablets and liquids. Being high in calcium content, PCC
enables the formulation of high dosage calcium supplements and
multi-vitamin/mineral tablets. The small particle sizes and special
particle shape contribute to the development of good tasting calcium
In paint, which is another important applications, calcium
carbonate has now established its self as the main extender.
Fineness and particle-size distribution determine the opacity.
Moreover, calcium carbonate offers interesting properties as regard
to weather resistance, low abrasiveness, low electrolyte content, pH
stabilizing effect, and improved anti-corrosion and rheological
properties of coatings. Calcium carbonate is also important in
water-based system, in which it contributes to the shortening of the
drying time with - for example - important implications in road -