| 摘要 |
<p>The invention relates to a method for recovering the metal values from materitls containing at least one of zinc and tin, by smelting the shirting materials under oxidizing conditions and reducing the resultant molten bath. The starting materials are first smelted In a furnace while adding thix, to form a slag which is sluggish at selected reduction temperatures and of low lead contents. The reduction process is carried out while charging solid carbonaceous reduction agent and optioually also sulphur- and/or chlorine-donor material to the slag. The reduction agent and optionally supplied donor material,'s brought into suspension with the stag, and this suspension is sustained at least during the latter phase of the reduaion period, at which the lead content of the slag has falle to beneath about 1-2%, during which phase the reductior of zinc and tin takes place. Zinc is recovered from the furnace in the form of zinc vapour, while tin optionally is removed 13 volatile tin sulphide, chloride or oxide, and lead and any cther metal values present in the atarting materials are recovered as a moltan lead phase.</p> |
