Title:
METHOD AND FACILITY FOR PRODUCING LEAD
Document Type and Number:
WIPO Patent Application WO/2020/110198
Kind Code:
A1
Abstract:
A method for producing lead is a method for producing lead using a lead paste having or not having grid lead or galena ore as a raw material, the method comprising bringing the raw material into contact with a solvent that contains, in an aqueous solution, some compounds selected from an acetate salt, a chloride, a nitrate salt, a citrate salt and salts thereof and a material having the form of an ion or a molecule and capable of bonding to a lead metal ion to dissolve the desired lead in a selective manner, thereby producing a lead-ion-rich solution. The method includes the step of adding a lead reduction accelerator comprising a powder of a metal different from lead and selected from aluminum, iron, copper and zinc or a chemical reduction accelerator comprising hydrazine, sodium bromide or sodium metabisulfite to the lead-ion-rich solution to accelerate the reduction of a lead ion and then collecting lead, wherein a solvent obtained after the precipitation of lead is recycled from the lead-ion-rich solution.
Inventors:
RAHMANLOO BEHNAM (JP)
ARAKI MEYSAM (JP)
NAEIMI ALEN (JP)
ARAKI MEYSAM (JP)
NAEIMI ALEN (JP)
Application Number:
PCT/JP2018/043568
Publication Date:
June 04, 2020
Filing Date:
November 27, 2018
Export Citation:
Assignee:
JFC TECH CO LTD (JP)
International Classes:
C22B13/00; C22B7/00
Domestic Patent References:
| WO2016183428A1 | 2016-11-17 | |||
| WO2011013149A1 | 2011-02-03 |
Foreign References:
| US5944869A | 1999-08-31 | |||
| JPS63501023A | 1988-04-14 |
Attorney, Agent or Firm:
ARAI, Shigeto et al. (JP)
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