铜精鑛的沸腾焙烧在颇大程度上决定焙烧以后各工段,即精鑛反射炉熔炼与冰铜吹炼工段的生产量和成本。肖铜精鑛中含有锌时,焙烧的作用则具有更加重要的意义。因为,硫化锌妨碍熔炼进程和炉渣与冰铜的分离,因而降低了铜的回收率。当铜锌精鑛在熔炼前焙烧得澈底时,则大部分锌进入炉渣,这样就可以提高铜的回收率,同时便有可能用升华方法从炉渣中进一步回收锌。在这种情况下,将产出富冰铜,从而将会减少吹炉的装料量,并可节省出压缩空气用于升华。这样的焙烧条 The boiling roasting of copper concentrate to a large extent determines the production and cost of each section after roasting, that is, the concentrate-refiring furnace smelting and matte-blowing section. Shaw copper concentrate contains zinc, the role of roasting is more important. Because zinc sulfide hinders the melting process and the separation of slag and matte, the copper recovery is reduced. When the copper-zinc concentrate is calcined to a minimum before smelting, most of the zinc enters the slag, thus increasing the copper recovery and possibly further sublimation of the zinc from the slag. In this case, ice-rich copper will be produced, which will reduce the charge of the furnace and save the compressed air for sublimation. Such a roasting bar