You are here: Home > Products > Kaolin > Product Specification Sheet
SCM Home SCM Home

Kaolin Product Specification Sheet

CLAY NKPL GP1

Description: A dry milled kaolin, (china clay) of good white colour. Typically used for the manufacture of whiteware ceramics, manufacture of paints, or as a filler where a white colour is required.

Specifications: Typical chemical and physical properties:

Commercial Kaolin currently marketed in NSW
NKPL GP1¹
(%)
HR1/F²
(%)
Q38³
(%)
Q145³
(%)
Silica
SiO2
50.7
48.4
50.3
49.3
Alumina
Al2O3
35.1
33.4
34.3
33.8
Magnesia
MgO
0.15
0.2
0.3
0.4
Potash
K2O
0.72
0.2
1.1
2.4
Soda
Na2O
0.10
0.2
0.2
0.1
Lime
CaO
0.04
0.1
0.1
0.1
Ferric Oxide
Fe2O3
0.34
1.3
0.9
0.8
Titania
TiO2
0.26
2.5
1.5
1.5
Loss of ignition
(1000°C)
12.49
12.8
12.0
10.9

Mineralogy (NKPL GP1):
Quartz
-
9.4%
Kaolinite
-
83.0%
Mica
-
6.1%
Brightness - R457nm:
NKPL GP1
-
77
HR1/F
-
71
Q38
-
72
Q145
-
72
Calcined Brightness (NKPL GP1):
1,000°C
-
76
1,100°C
-
85
1,200°C
-
93
Pyrometric Cone Equivalent (PCE):
31.5 to 32.0
Typical partical size distribution (determined by Kmetoni (1985) for NKPL GP1)

Notes:

¹ NKPL GP1 sample from Rocla tailings dam: -20μm, non-magnetic, split after separation (Kmetoni, 1985).

² HR1/F - Home Rule 1, from Gulgong.

³ Q38, Q145 - from Gulgong.