Pelletising of Hematite Ores

Abstract

Sintering of iron ore fines is assuming great importance in the field of the world's iron and steel industry. This fact depends chiefly: (a) upon necessity of treatment and concentration of lower grade ores,with consequent production of fine concentrates. (b) Upon development of beneficiation techniques, which allow to use ores that up toa few years ago were of no commercial importance (c)Upon advantages shown by burden preparation for blast furnace requiring the separation of fines from the charge. Most of such fines is sintered in DwightLloyd type contiuous grate machines, that hold the first place in sintering ferrous fines. For some time there has been a growing offer of very fine ores, i.e. magnetite concentrates, fine pyrite cinders, flotation concentrates and flotation tailings whose treatment in usual sintering plants pose consi-derable difficulties.