Cenospheres

Cenospheres have the following areas of application;
- Cementing
- Plastics
- Construction
- Automobiles
- Ceramics

Cenospheres offer the following utility:
- Cost Efficient
- Low Density
- High Strength
- Improved Flowability
- Low Shrinkage
- Thermal Stability

Cenospheres are marketed in various grades according to the following specifications:
- Crushing Strength Density
- Size

This spherical shape of Cenosphere allows flowability low surface area- to-volume ratio. Due to this it provides even distribution of the filler material.

Being inert it is not affected by solvents, water, acids of alkalis. Cenospheres are 70% lighter than other minerals which are being used as filler.

Utilisation of cenosphere reduces the cost of the final product and at the same time improves strength and durability.

Specification

Physical Properties

Specific Gravity	0.70 - 0.80 G/CC
Bulk Density	400 - 450 KGS/CBM
Hardness (MOH)	5 - 6
Compressive Strength	180 - 280 KGS/CBM
Shape	Spherical
Packing Factor	60 - 65%
Wall Thickness	5 - 10% of Shell Diameter
Colour	Light Grey, Light Buff
Melting Point	1200 - 1300 ^oC
Thermal Conductivity	0.11 WM-1k-1
PH In Water	6 - 7
Moisture	0.5% Max
Loss on Ignition	2% Max
Sinkers	3% Max
Oil Absorption	16 - 18g/100g

Chemical Properties

	All Grades
SiO₂	52% - 62%
Al₂O₃	30 - 36%
CaO	0.1 - 0.5%
K₂O	1.2 - 3.2%
Fe₂O₃	1.0 - 3.0%
TiO₂	0.8% - 1.3%
MgO	1.0% - 2.5%
Na₂O	0.2% - 0.6%
CO₂	70%
Nitrogen	30%

Sieve Analysis

	APC30	APC60	APC85	APC100	APC120	APC150	APC30-150
+30 # (500 Micron)	0 - 1%	NIL	NIL	NIL	NIL	NIL	0 - 1%
+60 # (250 Micron)	10 - 35%	0 - 1%	NIL	NIL	NIL	NIL	10 - 35%
+100 # (150 Micron)	40 - 80%	20 - 70%	1% Max	NIL	NIL	NIL	40 - 80%
+150 # (106 Micron)	70 - 90%	50 - 80%	0 - 30%	0 - 5%	0 - 5%	0 - 10%	70 - 90%
+240 # (63 Micron)	85% - 95%	75 - 95%	20 - 70%	35 - 75%	35 - 75%	70 - 95%	85 - 95%
-240 #	0 - 10%	0 - 20%	0 - 20%	0 - 20%	0 - 20%	0 - 30%	0 - 10%