White clay

alteration of rocks rich in feldspars

White clay

It is a mineral formed by alteration of rocks rich in feldspars such as granites, gneisses, arkoses and feldspar conglomerates.
Its main properties are its fine grain size distribution, whiteness, inert nature to chemical attacks, great covering power, low oil and moisture absorption and no water absorption.
We work mainly with clays from Eastern Europe with great plasticity and clays from Asturias with great whiteness.
We work clay with high modulus of rupture which allows for formulations suitable for large formats.

Fine grain size distribution

Whiteness

Inert nature to chemical attacks

Great covering power

White Clay from Eastern Europe

SiO2 Al2O3 Fe2O3 CaO MgO Na2O K2O TiO2 P2O5 C TOTAL COT S TOTAL PF
HIGH ALUMINA (LOW IRON) 60 26,5 0,9 0,45 0,65 0,5 1,9 1,4 0,11 0,11 7,2
HIGH ALUMINA (+ IRON) 59,2 26,6 1,81 0,33 0,51 0,40 2,0 1,4 0,07 0,06 0,05 0,01 7,8
MEDIUM ALUMINA 63,7 23,9 0,97 0,28 0,48 0,31 1,81 1,22 0,08 0,09 0,04 7,3
LOW ALUMINA 68 22 1,1 0,45 0,65 0,65 1,9 1,5 0,06 0,05 5,8

White Clay from Portugal and other countries

SiO2 Al2O3 Fe2O3 CaO MgO Na2O K2O TiO2 P2O5 C TOTAL COT S TOTAL PF
PORTUGUESE HIGH ALUMINA 55,89 27,85 2,15 0,09 0,27 0,13 2,22 0,42 0,1 0,37 0,23 0,19 10,05
PORTUGUESE KAOLINITIC CLAY 54,6 29,78 2,12 0,12 0,26 0,13 2,4 0,6 0,10 0,29 0,21 0,13 9,7
PORTUGUESE LOW RANGE 59,7 26,3 1,82 0,25 0,32 0,10 1,49 0,58 0,10 0,26 0,13 9,2
TURKISH WHITE CLAY 58 26,26 2,22 0,1 0,57 0,09 2,62 1,14 0,1 0,11 0,06 0,05 8,1

Applications

Ceramic industry

for the manufacture of ceramic floor and wall tiles, sanitary ceramic, table ceramic (earthenware and porcelain), bricks and tiles, foundry crucibles or insulators.

Chemical industry

as filling materials or loads, coatings and adhesives and in the manufacture of fiberglass.

Rubber industry

paints and plastics cover lower percentages of the world production.

If you have any question