Experimental study on mineral processing technology of a kaolin in Hepu county,Guangxi

Because certain Kaolin ore in Hepu of Guangxi is the sedimentary kaolin,and the Ti-bearing minerals in the raw ore are mainly nonmagnetic anatases,it is difficult to remove the iron and titanium.In order to reduce iron and titanium,and also improve whiteness of-2μsample ore,several exploring solutions such as high-gradient magnetic separation,sorting by centrifugal separator,flotation and selective flocculation have been carried out in this experiment.Finally,the process flows as desanding-gradingremoving iron and titanium by centrifugal separator-grading-chemical bleaching have been adopted.As a result,the coating grade products reach a better index:-2μcontent over 90%,Al₂O₃ 35.11%,SiO₂ 46.35%,TFe 0.78 %,TiO₂ 0.89%,SO₃ <0.5%,kaolinite >85%,illite <15%,very little quartz, whiteness 80.4.At the same time,it gets the higher quality silica sand and ceramic raw materials,which bring considerable economic benefits.