| 摘要 |
Copper and/or nickel sulphide ore concentrate of high intrinsic energy is smelted by exothermically reacting the ore concentrate with oxygen in an oxidation station (29) to produce the metal, or a low-iron matte, and sulphur dioxide. The metal or low-iron matte is recovered via line (34). Sulphur dioxide removed from the oxidation station (29) is passed via a fluidised bed (38) to a sulphation reactor (42) where some of sulphur dioxide is reacted with dolomite. Remaining sulphur dioxide and oxygen is passed to heat recovery steam generator (44) wherein sulphur trioxide is formed. The sulphur trioxide and further oxygen is passed via eductor (46) to the oxidation station (29). In the oxidation station (29), at least some of the sulphur trioxide is endothermically dissociated to form sulphur dioxide and oxygen so as to absorb at least some of the exothermic heat resulting from reaction of the ore concentrate with the oxygen.
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