Specifications
calcined kaolin powder 1250mesh whiteness 881.colour:white
2.application:ceramics, medicine, coated paper
calcined kaolin powder 1250mesh whiteness 88
Kaolin, or China clay, is nearly white in color. It is distinguished from other industrial clays based on its fine particle size and pure coloring. Its ability to disperse in water make it an ideal pigment. The primary constituent in kaolin is the mineral kaolinite, a hydrous aluminum silicate formed by the decomposition of minerals such as feldspar
TECHNICAL SPECIFICATION
Physical & Chemical analysis | LIMITS |
SiO2 | 53.02 |
Fe2O3 | 0.42 |
Al2O3 | 44.57 |
TiO2 | 0.68 |
K2O | 0.06 |
CaO | 0.4 |
MgO | 0.28 |
Na2O | 0.03 |
LOI | 0.54 |
Hardness | 2.3 |
PH | 6 |
Density | 2.53 |
Brightness | 94 |
Physical Specifications:
Bulk Density: 0.64gm/cc
Oil Absorption: 30%-48%
Acid Soluble matter: 4.97
pH (10% solution): 8
Sp. Gravity: 2.52
%Volatiles at 120oC/hr: Max 2.0
Sp. Gravity at 30oC: 2.60-2.70
Flow Point: 160 -190 ml/100gm
Uses of China Clay:
China, Porcelain and Tableware – Many people are under the mistaken impression that the only use for kaolin is in the manufacture of china. This is not true, and its use by the paper industry far exceeds its other uses. However, kaolin still serves as a valuable component in china and other tablewares. Its color, gloss and hardness are ideal characteristics for such products.
Paper Industry – The primary use of kaolin is in the paper industry. It serves as a paper coating which improves appearance by contributing to brightness, smoothness and gloss. It also improves printability. Additionally, it is used by the paper industry as a filler reducing cost and the use of tree-based resources
Other Uses – Kaolin has a variety of other uses in products including paint, rubber, cable insulation, specialty films and fertilizers. New uses are being discovered frequently, and ensure that the mineral will remain in demand for a long time.