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 […]
China Clay Manufacturing Process:
The modern production process of china clay from mines is a three step method.
1. The earth overlaying the clay is removed and a high pressure water jet is fired at the quarry face to liberate the clay. This process is important to remove the drilled mud […]
China Clay for White ware Industry:
Required Specification for Bone China:
The addition of China clay in the Bone China composition is required to provide plasticity and green strength for handling of green wares as ball clays cannot be used in bone china due to high iron oxide and titania contents. The china clay also increases the […]
