Pure kaolin has high whiteness, soft, easily dispersed suspension in the water, good
plasticity and high adhesion, excellent
electrical insulation properties; with good acid-soluble, low cation exchange capacity,
better fire resistance and other
physical and chemical properties. Therefore kaolin is widely used in papermaking, ceramics,
rubber, chemicals, paints, pharmaceuticals
and defense industries, ect. Kaolin has wide application in the paper industry. There are
two main areas, one is filler in
paper making process, and the other is pigment in used in coating industry.
1.Beneficiation, crushing, grind into powder of 325 mesh or less; 2.Mixing powder, water and
disperser,and beating,make it into 4500-6000mesh; 3.The ultra fine slurry was dried and
beat,then calcinated , adding 1-3% white agents of the total weight when calcinated,
White agents is made by coal, sodium sulfate and sodium chloride, by weight 10:0.3:0.2 mix.
Calcination temperature should
be 970-990 ℃;
4. Beating and packed in bags;