Title:
【発明の名称】硫化鉛含有材料から鉛を分離する方法
Document Type and Number:
Japanese Patent JPS6045258
Kind Code:
B2
Abstract:
Lead is separated from material containing lead sulfide, e.g. galena ore concentrate, by a substantially autogenous process involving establishing a pool of molten lead in a kettle, adding a metallic alkali metal, e.g. metallic sodium, to the molten lead in an amount sufficient to reduce the combined lead of the lead sulfide to metallic lead, adding the ore concentrate to the molten lead pool, and mixing together the metallic sodium, molten lead and ore concentrate. The sodium reacts rapidly and exothermically with the lead sulfide to reduce the combined lead of the lead sulfide to metallic lead and form sodium sulfide. The thus-liberated metallic lead reports in the molten lead pool, and a matte phase containing the sodium sulfide separates from the molten lead and forms on the surface of the molten lead pool. Lead sulfide from an excess of the ore concentrate, or other suitable added flux, which is usually added to the molten lead pool, serves to flux the sodium sulfide-containing matte phase to attain desired fluid and low melting characteristics of the matte phase. The process herein employs a kettle as the reactor, ordinarily the steel refining kettle of a lead refinery, is a low temperature process requiring temperatures above the melting point of lead but ordinarily not above 650 DEG C., and does not discharge polluting SO2 into the atmosphere.
Inventors:
KAARU AARU DEI MAACHINI
HAABAATO II HAU
UIRIAMU ERU SUKOTSUTO
REO JEI BURUBANOSUKII
HAABAATO II HAU
UIRIAMU ERU SUKOTSUTO
REO JEI BURUBANOSUKII
Application Number:
JP4157881A
Publication Date:
October 08, 1985
Filing Date:
March 20, 1981
Export Citation:
Assignee:
ASARCO INC
International Classes:
C01G21/00; C22B5/04; C22B7/04; C22B13/02; C22B13/06; (IPC1-7): C22B13/02
Attorney, Agent or Firm:
Kyozo Yuasa