Kaolin removal method
published date: 2019/11/12
high intensity magnetic separator
PTMS magnetic separation
what is magnetic separation in Feldspar?
The chemical composition of kaolin contains a large amount of AL2O3, SiO2 and a small amount of Fe2O3, TiO2 and trace amounts of K2O, Na2O, CaO and MgO. Can use the reduction method! The Fe2O3 is reduced by heating at a high temperature with carbon monoxide, and part of the iron element is converted into a simple substance, and then the solid is washed with a certain concentration of hydrochloric acid according to the characteristics of the dilute acid and the alkali of the kaolin. Then wash it off with distilled water. Another method is to use the magnetism of Fe2O3 to smash the kaolin and then use a magnet to suck a part. It is not possible to use hydrofluoric acid because it is a weak acid and cannot react Fe2O3 at all, but may cause SiO2 to react.