Improve Kaolin Whiteness
Another major and most important factor that determines the Beneficiation process to choose is the type of impurities in the Kaolin. The whiteness and opacity of Kaolin clay greatly depends upon its impurity contamination. Again the impurity contamination in the Kaolin Clay depends upon its origination.
Primary Kaolin from deposits may be different or […]
Improve Kaolin Whiteness
The whiteness of Kaolin depends upon the impurity it is contaminated with. As said already, crude Kaolin is generally contaminated with impurities Iron, Titania, Hydroxides, Feldspar, Quartz and Mica. The whiteness of Kaolin clay can be improved by processing it. Beneficiation plays a vital role in improving the whiteness of the Kaolin. The […]
Calcination of Kaolin:
Calcination of Kaolin increases hardness, increases whiteness, improves electrical properties, and alters the size of Kaolin particles. Calcined Kaolin is produced by heating the natural Kaolin to high temperature in Kilns. Market uses of calcined Kaolin is in Rubber, Paint and Plastic industries. Calcined Kaolin is also used as a filler in plaster […]
China Clay/Kaolin for Rubber Industry:
Kaolin is used in rubber industry as functional fillers. Kaolin get its importance due to its ability to impart stiffness and reinforce the rubber, thereby improving the tear resistance and tensile strength properties of rubber. Thus Kaolin is used in rubber manufacturing to improve rubber performance. Different types of beneficiated kaolin […]
China Clay for Paper Industry:
Comparison conclusion on different beneficiation methods:
Size classification though removes almost 50% of the iron content there is only a very small improvement in brightness. The titania impurities remain intact and hence not much improvement in brightness. The SC HGMS method shows very high improvement in brightness this is due to the […]
China Clay for Paper Industry:
Deferration Treatment by various chemicals removes all the Free Iron content in Kaolin. Of these methods, citrate dithionite bicarbonate treatment (CDBT) is considered the best. The Froth Flotation method can remove up to 15% of iron content and 24% of titania impurity. The CDB can remove upto 23% of free […]
China Clay for Paper Industry:
External or Free Iron impurities can be removed to an extent by Chemical Leaching method, however they cannot completely clean the kaolin from the free iron though this is the most efficient and aggressive method. Other reagents used for Fe removal from clay are pyrophosphate, oxalate, EDTA and CDB. The steps […]
China Clay for Paper Industry:
The following Beneficiation steps will help improve the brightness of the Clay.
1. SC HGMS
2. Froth Flotation
3. Chemical Leaching with CDB
Analytical test results show that the SC HGMS (Super Conducting high gradient Magnetic Separation) […]
China Clay for Paper Industry:
Beneficiation of China Clay will play a very important role in making the crude China Clay or Kaolin to be made use in Paper Industry. Following are the specification that the Paper Grade Kaolin should be controlled for:
1. Particle Size Distribution
2. […]
China Clay for Ceramics:
China Clay gains in importance in ceramics due to its contribution in Color of the finished objects and its high temperature performance. China Clay results in bodies that range in color from white to ivory. China Clay tend to have moderate particle size of 1 to 2 micro m and because of […]
