The high quality of the Prosyana deposit, combined with the modern production technology used in processing produces grades that can meet the most stringent applications. High brightness grades suitable for use in high speed paper and board coating are produced and marketed as well as kaolin grades for supercalendered paper grades and other filling applications. Production flexibility allows the production of a wide range of grades with a range of particle sizes and brightness.
All coating and filling grades are supplied in the form of ‘acid lump’, noodles with a pH of 5-6 in bulk or one tonne big-bags.
In terms of application in different industries, the following grades of kaolin are singled out at the chemical refining plant:
Coating kaolin grades
The coating kaolin grades produced are engineered to give high performance and value in use. These grades are processed to classify the particles to specific particle size ranges by the removal of both ultrafine and coarse particles and the brightness is improved through the removal of impurities by magnetic separation and a bleaching process.
Filler grades
PROSCO RESOURCES filler grades are relatively coarse kaolin products with controlled particle size distribution and brightness.
