Abrégé

A process for lead slag reduction subjects the slag to top-submerged lance injection of oxygen containing gas and fuel, via a vertically suspended lance having its lower tip end submerged in the slag. The injection generates a combustion zone in the slag in which fuel is combusted and generates turbulent conditions forming a slag coating on the lower extent of the lance which is solidified by the cooling effect of the injected gas. The injection is conducted under reducing conditions, using a sulphidic material as a reductant, to reduce lead in the slag to metallic lead and thereby form a molten lead phase which is able to be tapped as lead bullion.

Classes IPC  ?

• C22B 7/04 - Mise en œuvre des scories
• C22B 5/08 - Procédés généraux de réduction appliqués aux métaux par voie sèche par les sulfuresProcédés de réaction par grillage
• C22B 13/02 - Obtention du plomb par voie sèche