METHOD AND DEVICE FOR PROCESSING RAW LEAD MATERIAL Russian patent published in 2006 - IPC C22B13/02 F27B17/00 

FIELD: non-ferrous metallurgy; methods and devices for processing raw lead materials.

SUBSTANCE: proposed method includes treatment of entire volume of slag melt with oxygen-containing blast in zone of delivery of blast to melt at rate of 500-1500 nm³/h per m³ of slag; oxygen-containing blast is simultaneously delivered to slag melt at level above metallic lead surface of 5 to 20 calibers of lance and above slag melt of 30-80 calibers of lance assuming smooth surface of slag; metallic lead temperature is maintained within 700-1100°C and that of slag within 900-1300°C. For realization of this method, use is made of furnace whose crucible hearth located vertically in calibers of lance of lower row relative to horizontal plane of lances below by 10-30 calibers under furnace shaft and slag siphon channel hang-up by 2-10 calibers, pouring port lip is located above by 10-20 calibers and by 30-100 calibers of upper row lances; lead siphon hang-up is located below hearth level by 2-5 calibers.

EFFECT: reduced mechanical carrying-over of dust-like materials of burden and effluents of toxic agents with waste gases; enhanced reliability and safety; increased service life of equipment.

13 cl, 7 dwg, 1 ex