| 摘要 |
A method of refining crude lead from copper-containing lead raw-materials which possibly also contain arsenic and which are of a metallic, oxidic, sulphatic or sulphidic type, in a furnace in which the contents thereof can be subjected to turbulence, preferably in a top blown rotary converter, for example, of the Kaldotype. According to the invention, subsequent to chemical reduction and tapping-off of the slag, the crudelead melt is cooled to a temperature beneath about 700 DEG C whilst strongly agitating said melt, in order to separate out a copper phase or a copper speiss. The coolant used may be an oxidic or sulphatic lead raw-material, a crushed iron-silicate slag, a slag former, and, preferably, water in liquid finely-divided form, Large quantities of arsenic can be removed prior to said cooling, by forming an iron speiss, by adding iron to the crude-lead melt or forming iron in situ therewith. |
