Desulphurisation of coal using low power microwave energy

摘要: Abstract The application of microwave radiation at 500 w power and a frequency 2.45 GHz for the preferential heating dielectric inorganic pyrite in high sulphur coals to form more magnetically susceptible phase allow low gradient magnetic separation FeS2 is described. However, although was selectively heated under these conditions compared with clean coal, rates were not enough reach temperatures necessary conversion pyrrhotite, owing this work. When coal mixed strong caustic (KOH or NaOH) solutions (of concentration 300 g/l) 20% solids which are excellent absorbers, degree obtained that enabled desulphurisation take place. powdered −212 μm after exposure microwaves periods up 60 seconds significantly altered character apart from maximum 70% reduction total content, varied alkali. mechanism by enhanced also chemical dissolution both organic washed along any remaining treatment.