4Kelland D R, Lai-Fook M, Maxwell E, et al. HGMS coal desulfurization with microwave magnetization enhancement [ J]. IEEE Transactions on Magnetics, 1988,24(6) :2434 -2436.
5Hise E C,Holman A S,Friedlaender F J. Development of high-gradient and open-gradient magnet separation of dry fine coal [ J ]. IEEE Transactions on Magnetics, 1981,17 (6) :3314-3316.
6Fine H, Lowry M, Power L, et al. A proposed process for the desulfurization of finely divided coal by flash roasting and magnetic separation[ J]. IEEE Transactions on Magnetics, 1976,12(5 ) :523-527.