Filter Aid Perlite
What is Perlite?
Perlite in the natural state is a dense glassy rock formed by volcanic action. When crushed and treated under proper conditions, it pops like popcorn, expanding to 20 or more times its Original volume.
A special milling and classification process gives the Perlite filter aids the structure and correct particle size range distribution needed for optimum performance.
Perlite
Expanded Perlite
Crushed Perlite Ore
Perlite Ore
Chemical Composition wt%
Sio2 |
72 - 76 % |
Fe2O3 |
0.5 - 1.5 % |
Al2O3 |
7 - 11 % |
Na2O |
2.9 - 4 % |
K3O |
4 - 5 % |
CaO |
0.5 - 2.5 % |
MgO |
0.1 - 0.5 % |
TiO2 |
0.03 - 0.2 % |
H2O |
2 - 6 % |
Perlite Filter Aid
Perlite filter Aid is produced by meticulous Ore classifications. Several grades are obtained by milling the expanded Perlite and classify it using cyclone separation system. Expanded Perlite exhibit a unique jagged interlocking structure with myriad of microscopic channels to enable Optimum flow rate and clarity for varied applications.
For the past two decades, the use of Perlite as filter aid has taken over Diatomite in terms of efficiency and economy. It is known that the trend will fort escalate in the near future as Perlite - related products continues to gain acceptance in markets outside of the U. S .A.1800 |
1600 |
1500 |
EGYPERL GRADE |
WHITE |
WHITE |
WHITE |
COLOR |
2.3 |
2.3 |
2.3 |
SPECIFIC GRAVITY |
0.18 |
1.00 |
2.2 |
PERMEABILITY DARCIES |
260 |
100 |
130 |
LOOSE WEIGHT DENSITY ( KG/ M3 ) |
350 |
200 |
240 |
FILTER CAKE DENSITY ( KG / M3 ) |
0 % |
8 % |
20 % |
%RETENTION U.S. SIEVE NO.140 |
7.5 |
7.5 |
7.5 |
PH 10 % SLURRY |
0.5 |
0.5 |
0.5 |
% MOISTURE MAX |
Typical Properties Egyperl Perlite Filter Aides :
Egyperl Perlite Filter aids are Produced in a full range of grades to economically meet the flow rate and clarity requirements of almost every industry.
Why do we need to use filter aid?
1- Filter aid is used for the kind of filtration in which it is the solid we want to retain, not the liquid. We want the liquid in well clarified condition.
2- Without a filter aid, such filtration is often very difficult or even impossible.
3-The fine solids accumulate on the filtering surfaces, and block them more or less quickly according to their size, thickness and concentration.
A comparison between systems use the filter aid and others don't. This will help us to understand the benefits that will be gained from using the filter aid systems.
Items |
Filter Aid systems |
Non-filter aid systems |
Filtration rate |
Fast |
Too slow |
Cycle time |
Long |
Too short |
Clarity of filtered liquid |
Very good |
Not good enough |
Filter cleaning |
Easy cleaning |
Very difficult cleaning |
Septum protection |
Well protected |
No protection |
The presence of light cloth |
Not required and best avoided |
Essential * |
* The presence of light cloth or other septum with very fine small apertures will has bad effect on the flow rate as this tight cloth is easily blocked by the impurities which will reduce the flow rate.
