Mineral's
Kaolin Clay
Kaolin Clay is white, soft, plastic clay mainly composed of fine-grained plate-like particles. Kaolin is formed when the anhydrous aluminum silicates which are found in feldspar rich rocks, like granite, are altered by weathering or hydrothermal processes.
The quality of Kaolin clay varies from mine to mine in many physical aspects, which in turn influence their end-use. Of particular commercial interest is the degree of crystallinity which influences the brightness, whiteness, opacity, gloss, film strength, and viscosity.
Process
Our quality assurance system extends from mining to micronizing to ensure near-Zero-defect products:- Water Washed Process
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Magnetic
Mined Kaolin clay contains iron oxides and silicates as impurity; if present in excess of a threshold level, the impurities affect the commercial value of the products. Currently available processes for lowering the iron content in Kaolin clay to the desired level ( < 0.8%) are energy- and cost-intensive, not sufficiently flexible, and may cause environmental pollution.
Bleaching
In a process for treating raw kaolin clay to improve the color and brightness by bleaching the clay in an aqueous dispersion with sodium dithionite, the improvement consisting of treating the dispersion with hydroxylamine or salt thereof within about 1 to 5 hours after the treatment with sodium dithionite is complete.
Calcination
The calcination of kaolin can eliminate the structural water in kaolinite minerals, and at the same time can remove organic pollution sources and some volatile substances. It is currently one of the most effective methods for processing kaolin.
Pulverization
Kaolin particles were pulverized in order to reduce the size by using high-energy ball milling under various ball-to-powder weight ratios. The elemental composition and particle size analysis of milled kaolin particles were carried out using X-ray fluorescence and Zetasizer particle size analyzer.
Technical Details
How by rigorous control of the reaction parameters such as concentration of reactants, temperature, stirring rpm, pH of the reaction, etc. the particle structure and morphology can be modified to give the optimum combination of properties like bulk density (lightness), absorption capacity, surface area, particle size, etc.
Test report of Crude
Kaolin clay white Lumbs.
| Sr. No. | Parameter | Result ( % ) |
|---|---|---|
| 1 | Moisture | 0 to 6 % |
| 2 | Size | 0 to 50 mm |