DIRECT SMELTING PROCESS FOR HIGH SULPHUR FEED Russian patent published in 2016 - IPC C21B13/00 

FIELD: technological processes.

SUBSTANCE: invention relates to a method for direct smelting a metalliferous feed material containing at least 0.2 wt% sulphur to produce a metal product. Method includes (a) at least partially reducing and partially melting metalliferous feed material in a smelt cyclone and (b) completely smelting at least partially reduced/melted material in a molten bath of a direct smelting vessel. Method includes maintaining an oxygen potential in smelt cyclone that is sufficient so that an offgas from smelt cyclone has a post combustion degree of at least 75 %. If metalliferous feed material is iron-containing feed material, high temperature equal to at least 1,100 °C is maintained in smelt cyclone.

EFFECT: invention provides metalliferous feed material with high content of sulphur without pretreatment.

11 cl, 1 dwg