Coal Desulphurisation and Ash Removal in Intensified Magnetic Fields

Data is presented demonstrating the effect of high gradient/high strength magnetic fields on a UK coal. Experimentation was carried out using a high–intensity (HIW) magnetic separator and coarser coal fractions were treated on a permanent magnetic roll separator capable of producing exceptionally high magnetic field gradients.

Total sulphur and ash removal data is given for coal fractions after magnetic treatment plus X–ray diffraction and magnetic profile analysis provides identification of the mineral constitution of the ash fraction of the coal.