| 摘要 |
PCT No. PCT/GB93/01053 Sec. 371 Date Apr. 27, 1995 Sec. 102(e) Date Apr. 27, 1995 PCT Filed May 21, 1993 PCT Pub. No. WO93/24666 PCT Pub. Date Dec. 9, 1993Copper and or nickel sulfide ore concentrates of high intrinsic value are oxygen smelted by introducing such concentrates via feeds (32) into a closed loop extraction circuit in which a molten sulphide carrier composition is forcibly circulated by an R-H unit (14) through lower hearth (10) at which feed of the concentrates takes place, and upper hearth (12) at which controlled oxidation with technically pure oxygen through top lances (4) takes place to oxidize copper sulphide and iron sulphide in the concentrate to iron oxide. Copper is removed via line (42). Slag containing iron oxide is discharged via weir (22) into a secondary circuit in hearths (24 and 28). Carbonaceous reductant added to the slag in (28) reduces the iron oxide in the slag to hot iron product. |
