Pumice Products

Our complete range of pumice powder, pumice grains, pumice pellets and pumice filtration media is acknowledged to be one of the finest available on world markets. Our modern manufacturing facility (opened February 2007) enables the production of super fine pumice products for the paint and coatings industry as well as standard sized pumice products for water treatments, SWRO, pre-treatment, desalination, cosmetic scrubs and metal treatments.

 

Pumice Filtration Media

Techfil are now one of the worlds leading suppliers of Pumice Filtration Media, with the use of our pumice in water filtration applications increasing worldwide. Pumice Filtration Media is now recommended in potable water treatments, seawater reverse osmosis (SWRO), desalination and waste water treatments. Pumice Filtration Media is increasingly being specified for contracts involving pre-treatment prior to SWRO and desalination, in both new and refurbished plants. This is due to its extremely high particulate removal, low density and its versatility; Pumice can be used in mono and multi-media filters in both pressure and rapid gravity filter designs (DMGF).


Our Water Treatment Division is managed by our Chief Process Engineer John Martin. All our Pumice Filtration Media complies with British Standard (BS EN 12906-1999) – ‘’Products used for treatment of water intended for human consumption’’, European Standard EN 12901/ 12902:1999 and has UK Drinking Water Inspectorate approval. Additionally our Pumice Filtration Media meets all the chemical and physical testing requirements for AWWA B-100 and DIN EN 12906.


We are currently in the process of seeking full SWCC (Saline Water Conversion Corporation) approval to further expand our Middle East Division.


Additionally our Pumice Filtration Media is being specified for installations as a direct replacement for filtration grade anthracite. It has significant operational benefits over anthracite as well as being more cost effective.


Our Pumice Filtration Media No.4, No.5, No.6 and No.8 are recommended.

 

Pumice in Aerobic and Anaerobic Systems

Pumice is used in aerobic and anaerobic systems with great success. In Aerobic treatments the pumice, in addition to its ability to assist clarification, is an essential addition in the Sequencing Batch Reactor (SBR) process where inadequate time has been allowed for phase separation to take place. The addition of pumice just prior to the settlement stage enhances the settlement of the sludge allowing the plant to perform as initially designed.


Where effluents are highly polluted with organic pollutants, the treatment that is finding increasing application is anaerobic treatment or methanisation where the pollutants are treated in the absence of air and methane is generated. The pumice acts as a biomass support in this process, typically employed in the treatment of wastes from breweries, sugar processing, paper manufacturing, daries etc. The concentration of biomass is significantly increased, growing in ideal conditions on the porous surface of the pumice and resulting in reduced retention times and higher methane gas generation.
Advantages of using pumice include: large surface area, favourable surface conditions for bacterial growth, increased concentration of biomass, reduced retention time and increased methane generation.


Our Pumice Filtration Media No.4, No.5, No.6 and No.8 are recommended.

 

Cosmetic Pumice

The use of pumice in cosmetics scrubs is well established. It can be used in both exfoliating facial scrubs and foot scrubs. The pumice particles provide an excellent exfoliating medium which gently removes dead and rough skin leaving it fresh and revitalised. We have an extensive range of cosmetic pumice and can offer irradiated pumice powder processed at 15-35kGy if required.


For facial scrubs we would recommend our Pumice Powder FFF, FF and 3/0. For foot scrubs our Pumice Grains ½ and No.3 are recommended.

 

Pumice in Printed Circuit Board (PCB) Preparation

Brush or jet scrubbing of PCB’s with a pumice slurry is an effective method of surface preparation. After stripping the first photoresist, a second photoresist layer is laminated over the board and developed to expose selected portions of the solder. The exposed portions are selectively stripped. The copper exposed by the selective stripping is then subjected to pumice scrubbing while the photoresist protects the remaining solder, and the second photoresist is removed.


Pumice Powders FFF, FF and 3/0 are recommended.

 

Pumice Glass Treatments

Polishing of crystal with pumice has been a traditional pre-polish glass treatment for many years. The necks and bases of blanks are given particular attention by technicians in the workshop using felt and cork wheels. Pumice as a polishing agent is also widely used when preparing toughened glass and bevelled glass products.

 

Pumice Powders FFF, FF, 3/0 and 2/0 are recommended.

 

Pumice Industrial Hand Cleaners

Pumice grains and powders are used extensively in industrial hand cleaners to assist in the physical removal of oils and grease. The abrasive action removes the stubborn stains whilst cleansers in the base protect the skin.

 

Pumice Powder 1/0 and Pumice Grains ½ and No.3 are recommended.

 

Pumice in Paints & Coatings

Our pumice products are widely used in the paint and coatings industry as an alternative to traditional fillers such as nepheline syenite and silica. The low density and unique particle morphology of the vitreous pumice imparts many desirable properties to the formulation. There are two distinct types of pumice used in these applications differentiated by their particle size distributions.

 

Ultrafine Pumice Powders CT550, CT450 and CT200 are recommended.

 

Dental Pumice

Pumice is recommended as a polishing aid to finish acrylic denture moulds. It is used in a slurry form to assist dental technicians obtain a smooth surface. It is also used as a mild abrasive in oral hygiene pastes and polishing compounds.

 

Pumice Powders 3/0, 2/0 and 1/0 are recommended.

 

Pumice Odour Control Media

Pumice pellets are used as a biological filtration media in odour control applications, in particular to assist in the removal of H2S, mercaptans, ammonia and volatile organic compounds. Pumice is a granular naturally occurring product that is rapidly replacing the traditional biomass support systems of peat/heather, wood chips and mussel shells. Not actively participating in the biological process pumice is not “consumed” in the manner of the alternatives and therefore has a much longer life (typically greater than 15 years). It performs better, does not compact and retains its original low pressure drop and hence low running costs.


Advantages include; low capital and installation costs, low pressure drop during the life of the plant, high bed depths - therefore small installation footprint, low empty bed contact times and improved removal performance.


Pumice Pellets TP (15-25mm) and TW (30-50mm) are recommended.

 

Grades Available

Pumice Filtration Media         

Particle Size

Pumice Filtration Media No.4

0.4 - 1.0 mm

Pumice Filtration Media No.5 0.8 - 1.3 mm
Pumice Filtration Media No.6 1.2 - 2.4 mm
Pumice Filtration Media No.8 2.4 - 3.5 mm

 

Pumice Powder

Particle Size

CT550

5 microns

CT450 7 microns
CT200 12 microns
NB005 4 - 6 microns (800 mesh)
NB012 

9 - 14 microns (500 mesh)

FFF 5 - 74 microns (300 mesh)
FF

10 - 88 microns (240 mesh)

3/0 10 - 177 microns (120 mesh)
2/0 25 - 250 microns (90 mesh)
1/0 40 - 297 microns (60 mesh)

 

Pumice Grains

Particle Size

½

0.1 - 0.3 mm

1-½ 0.1 - 0.4 mm
No.3 0.2 - 0.5 mm
No.4 0.4 - 1.0 mm
No.5

0.8 - 1.3 mm

No.6 1.2 - 2.4 mm
No.8

2.4 - 3.5 mm

 

Pumice Pellets

Particle Size

TZ

1 - 3 mm

TG 3 - 6 mm
TH 5 - 10 mm
TN 10 - 15 mm
TP

15 - 25 mm

TQ 20 - 30 mm
TW

30 - 50 mm

TX 60 - 80 mm
TY 90 - 120 mm

 

Other Products in the Techfil Range

Sand Filter Media
Garnet Filter Media
Anthracite Filter Media
Activated Carbon
Support Gravel
Calcium Carbonate
Plastic Media
Aluminium Oxide
Glass Beads

 

Technical Literature

Please contact us at info@techfil.co.uk or visit our main site www.techfil.co.uk for more details.


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