Rashtriya Chemicals & Fertilizers Ltd.
 
 
Calcium Carbonate
 

Dry Purified & Unpurified Chalk

 

COMPOSITION

PURIFIED CHALK

UNPURIFIED CHALK

% Moisture wt       

0.5%

0.5%

% of purity as Caco3

95-99

80-85

Ammonical Nitrogen NH

200 ppm max

2 to 5

Nitrate Nitrogen No3-N

200 ppm max

1 to 4

Total P2O5 %wt

0.04 to 0.1

2 to 6

Silica % wt

0.12-0.2

0.5-1.5

Flourine as F % wt.

0.1 max.

200-600 ppm

Iron as Fe

3 ppm max.

300-500 ppm

Colour

White

Off-white

Typical analysis of purified precipitated Dry Chalk.

Purity as CaCO3           

99.0%

pH

7.6

Moisture

0.4%

Total P205

0.21%

Flourine as CaF2

0.02%

Ammonical-N

Not traceable

Nitrate-N

0.21%

Silica as SiO2

0.09%

Iron as Fe2O3

0.019

Al as Al2O3

0.08%

Mg as MgO

Not traceable

Chloride

0.02%

Loss on ignition

44.60%

Whiteness

72.92%

Brightness

81.09%

Bulk Density

1.098%

Particle size

50% -15.52 micron

95%- 41.38 micron
100%passing through-90 micron

INDUSTRIES SERVED:

Rubber Industry, PVC industry, Paper and Paints industry.

Dry unpurified chalk is used in road construction activities for binding.

 

Chalk (Sludge & Impure)

 

Specifications:

CaCO3

%

70-75

Moisture

%

20-25

P2O5

%

2-5

Fluorine

%

0.1

Iron

%

0.01

Colour

Off White

 

 Packing:

Loose in Trucks.

USES:

 1.  Effluent Treatment.

2.  Neutralisation in chemical reactions.

3.  For soil amendment in acid soils.

4.  As a filler in organic manure.

5.  As filler in tiles, linoleum, pencils, rubber and plastic goods and extenders in paints & inks.

6.  As a filler in road development and construction.

INDUSTRIES SERVED:

Effluent Treatment, Agriculture, Paints, Tiles.