High performance kaolin clay pigment, coating ink on paper formed by high performance kaolin clay pigment and method for producing high performance kaolin pigment

摘要

"High performance kaolin clay pigment, coating ink on paper formed by high performance kaolin clay pigment and method for producing high performance kaolin pigment.Where the pigment of kaolin has simultaneously improved rheological and optical properties obtained by means of a strict control of the size and shape of the particles, as well as the distribution of the size and shape of particles; the said pigment has the characteristics of kaolin And ISO brightness greater than 885; particle size distribution with a minimum of 94% by weight less than 2 109 m and a maximum of 25% by weight less than 0.2 109 m and viscosity Hercules in 1100 RPM lower than 18 dinas in slurry with solids concentration of 70 to 75% of solids; and a method which involves the steps of benefit Iciamento kaolin Grosso, which are understood by the dispersion, desareiamento for withdrawal of the sand.Centrifugation for disposal of coarse fraction and removal of impurities via conventional processes such as magnetic separation, flotation and leaching chemistry; and the said method still involves the steps of beneficiation of kaolin fine, which are understood by the dispersion, D. Esareiamento for withdrawal of the sand.Centrifugation for disposal of coarse fraction and removal of impurities via conventional processes such as magnetic separation.Flocculation and chemical leaching; and for the processing of kaolin, thick in the centrifugation step is a fine fraction characterized by a distribution granulamu00e9trica close with at least a 94% by weight less than 2 109 m and not more than 18% by mass less than 0.2 109 m; while for the beneficiation of kaolin fine in the centrifugation step is a fine fraction characterized by particle size distribution with a minimum of 90% by weight less than 0.5 GM and at least 50% by weight less than 0.2 109 M.