Pumice Lumps

Pumice lumps are extensively used in the dressing of grinding wheels and abrasive belts. They are also 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 lumps are also used worldwide as a filtration media in koi aquatic systems and as a decorative feature in largescale landscaping projects.

Technical  Data Sheet

1. Product Name / Reference

Pumice Lumps

2.  Main Intended Use

Dressing of grinding wheels, odour control applications and koi aquatic filtration media

3.  Chemical Description

This  media contains no free silica

Compound Element   Chemical Formula Typical Content
Silicon Dioxide SiO2 74.55%
Aluminium Oxide Al203 12.45%
Potassium Oxide K2O 4.50%
Sodium Oxide Na2O 4.00%
Ferric Oxide Fe2O <2.00%
Calcium Oxide CaO <2.00%
Magnesium Oxide MgO <2.00%
Titanium Dioxide TiO2 <2.00%
Sulphur Trioxide SO3 0.20%
Manganese Oxide MnO 0.10%
Carbon Dioxide CO2 0.10%
Ferrous Oxide FeO 0.06%
Phosphorous Pentoxide P2O5 0.005%
Combined Water H2O+ 4.35%

Determined by FAAS

4. Physical  Properties

a. Bulk Density 0.50 – 0.75g/cm3
b. Melting Point 1200 oc
c. pH Value 7.0 – 8.0
d. Specific Gravity 2.40 g/cm3
e. Hardness 5.5 Mohs

5. Sizes  Available

Grade Size
TW 30 – 50 mm
TX 60 – 80 mm

6. Packaging

Packed in 25kg polypropylene sacks and 1 cubic metre IBC big bags

Water Filtration No
Odour Control Yes
Green Roof Systems No
Cosmetics Scrubs No
Dental Treatments No
PCB Scrubbing No
Glass Treatments No
Metal Finishing Yes
Lightweight Precast Concrete No
Odour Treatment Yes
Seawater Reverse Osmosis No
Automotive Polish No
Effluent Treatment Yes
Horticulture Yes
Construction No
Hand Cleaner No
Paints & Coatings No
Lightweight Plasters No