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Kaolin (china clay) is a hydrated aluminum silicate derived from the mineral Kaolinite.

Kaolin is chemically inert clay with a low shrink-swell capacity, well-suited to a wide range of industrial uses including ceramics, paper, glass fiber, filler, paints, wire and cable and plastics.

 

Washed Kaolin: OG-71 and OG-60

Our OG series kaolin mined from China is a mixture of halloysite and kaolinite with some illite.

OG series kaolin deposit is characterized by low Fe and Ti level which make it very suitable for ceramics, especially porcelain.

 

 

TEM of OG series kaolin showing mixture of halloysite tubes and stacks of kaolinite.
      (refer. I. R. WILSON. Clay Minerals (2004). Kaolin and Halloysite Deposits of China.)


- Specification of Washed Kaolin 

Model

Kaolin OG-71

Kaolin OG-60

SiO2

51.72

-

Al2O3

35.41

36.54

Fe2O3

0.37

0.40

TiO2

0.02

-

CaO

0.20

-

MgO

0.21

-

Na2O

0.03

-

K2O

0.11

-

L.O.I

11.83

-

Moisture

24%±1%

Application

fine porcelain, tableware, sanitary ware

Origin

China

Particle Size

-2μm passing

-2μm: ≥69.00, <74.00

-2μm: ≥60%, <65%

Firing Whiteness

1280°C

≥89, <91

≥88.5, <90.5

 


Hydrous Kaolin: K99-C, K99-P and K99-F

K99 series kaolins are mined from West Australia with premium brightness and purity. Suitable for paper, white porcelain, fiberglass and other kaolin applications.

The resources and reserves of Australia K99 series kaolin deposit are abundant that gives mine life of 100+ years at 1Mtpa production.

K99 Series Kaolin deposit at West Australia


The mining of K99 series kaolin is conducted as free dig in open pits down to 30m.


Platelet crystalline structure of K99 series kaolin.


- Specification of Hydrous Kaolin (powder)

Model

Kaolin K99-C

Kaolin K99-P

Kaolin K99-F

Form

Powder (moisture≤1% by weight)

Application

Porcelain,

Sanitary ware

paper, paint

glass fiber

SiO2

46.5

47.4

46.5

Al2O3

39.6

37.8

39.6

Fe2O3

0.08

0.50

0.08

CaO

0.00

0.02

0.00

MgO

0.01

0.20

0.01

K2O

0.25

1.56

0.25

Na2O

0.02

0.05

0.02

TiO2

0.15

0.36

0.15

MnO

0.00

0.00

0.00

SO3

0.06

0.04

0.06

P2O5

0.01

0.03

0.01

Cl

<0.01

0.35

<0.01

Ig. Loss

13.2

12.0

13.2

pH

6.1

6.8

6.1

ISO Brightness

88.0

87.0

>80

Origin

Australia

Particle Size Distribution

+45μm residue

0.1%

0.1%

0.1%

-20μm passing

98%

99%

98%

-10μm passing

95%

-

95%

-5μm passing

82%

-

82%

-2μm passing

57%

66%

57%

-1μm passing

36%

-

36%

-0.5μm passing

16%

-

16%

Since the products are based on naturally occurring raw materials, data shown above are for reference only. Slight variation may occur.