Sandy Ridge Kaolin – Product Specification

SR02 Premium Coarse Kaolin for Ceramic Applications

Tellus Holdings Ltd’s (Tellus) kaolin clay will be mined from the up to 36m thick, 20 million year old, Sandy Ridge kaolinite clay bed, some 9 metres below the semi-desert of Western Australia. This is a low iron and bright firing hydrous kaolin clay, produced by chemical-free wet refining methods and is highly suitable for applications in ceramics, particularly tableware and glazes.

The following data is preliminary and is for information only. It does not constitute a contractual specification.

Product FormValue
Moisture Content12 % by weight
Packaging1 tonne bulk-bag
Potential Production Capacity12,000 to 40,000 tonnes per year
+45 microns retention (max)0.05 % w/w
< 10 microns82 % w/w
< 2 microns41 % w/w
Modulus of Rupture (MOR)7 to 8 kg/cm2
Casting Data
Casting Concentration54 to 55 % solids by weight
Casting Rate3.2 mm2/min
Deflocculant Demand (to 5 poise)1.06 % w/w
Fired (at 1180°C, oxidizing environment)
Fired Water Absorption26.8 % w/w
Fired Brightness (ISO)93 to 94 %
Fired Contraction6.90%
SiO247.0 to 47.3 %
Al2O336.5 to 37.0 %
Fe2O30.40 to 0.60 %
K2O0.45 to 0.70 %
TiO20.25 to 0.40 %
CaO + MgO0.20 to 0.30 %
Na2O0.04 to 0.08 %
L.O.I.13 to 14 %
Mn2O3, V2O5, Cr2O3, BaO, Zr2O, ZnO & SrOAll < 0.05 %
Optical (unfired)
Brightness (ISO)83 to 85 %
Yellowness (ECC)5.5
L, a, b (typ)95.7, 0.05, 3.5
Water Soluble Salts700 to 800 ppm

Sandy Ridge Project - From Exploration to Product Specification Sheet

First drilling program 1,864m
2nd program - 43 aircore drill, 7 geotechnical holes, 84 bulk sampling air core holes
Quality assessment and quality control - 915 samples
JORC Resource*1 (41.3 Million tonnes = 1,475 year mine life)
Simple kaolin bulk sample benefaction pilot
40 tonnes kaolin clay refined to 12 tonnes product
Ceramic clay
Kaolin samples – 12 tonnes