公开(公告)号：US3900310A

公开(公告)日：1975-08-19

申请号：US28963572

申请日：1972-09-18

申请人： OUTOKUMPU OY

发明人： KAASILA KAUKO JOHANNES ,  TOIVANEN TOIVO ADRIAN ,  HARKKI SEPPO UNTAMO ,  NEIMELA TOIVO ISAK ,  MAKIPIRTTI SIMO A ,  MALMSTROM ROLF E ,  TUOMINEN TAPIO KALEVI ,  AALTONEN OLAVI AUGUST ,  NOPONEN VEIKKO H

IPC分类号： C22B5/08 ,  C22B13/06 ,  C22B15/00 ,  C22B19/32 ,  C22B23/02 ,  C22B23/06 ,  C22B25/08 ,  C22B15/02

CPC分类号： C22B5/08 ,  C22B13/06 ,  C22B15/0047 ,  C22B19/32 ,  C22B23/02 ,  C22B23/06 ,  C22B25/08

摘要： A process is disclosed for the suspension or flash smelting of finely-divided oxide and sulfide ores and concentrates, a process in which a suspension of a finely-divided raw material in preheated air or oxygen is fed downwards at the reaction temperature or a higher temperature in a reaction zone formed together by the suspension and the smelt underneath in order to oxidize and partially smelt the suspension raw material, whereafter the oxidized raw material is partially sulfidized and the suspension flow is made to change its direction perpendicularly to the side so that the bulk of raw material in the suspension flow impinges towards the surface of the accumulated smelt in the main smelt reaction zone under the suspension reaction zone, and the remaining suspension flow is fed to a zone which has a rising flow, where the suspension is possible after-sulfidized and cooled and the solids to be returned to the suspension reaction zone are separated from the residual suspension flow. The suspension flow portion not impinging against the smelt surface in the main smelt reaction zone is fed into a secondary reaction zone wherein it is allowed to, at least, partially dissolve in the smelt before the undissolved residual suspension is fed into the rising-flow zone so as not to affect a smelt settling zone communicating with the main and secondary smelt reaction zones and in which slag is separated from matte and metal.