| abstract |
The invention discloses a kind of methods for restoring autovulcanization roasting pretreatment iron vitriol slag, the following steps are included: (1) mixes iron vitriol slag and reducing agent, resulting mixture is subjected to solid-solid and restores sulphur fixing roast, restoring the metal sulfate in iron vitriol slag becomes metal sulfide, obtains reduction roasting product；(2) the resulting reduction roasting product of step (1) is subjected to reduction-sulfurization roasting, iron sulfide and the heavy metallic oxide reaction in reduction roasting product is set to generate iron simple substance and heavy metal sulfide, ferriferous oxide reduction is set to become metallic iron, the agglomeration for realizing Fe and heavy metal sulfide simultaneously, obtains reduction-sulfurization product of roasting.The preprocess method can realize the metallization of the fixation of sulphur, the vulcanization conversion and iron of heavy metal to the greatest extent, and be conducive to valuable constituent and pass through flotation and magnetic separation recovery respectively. |