发明名称 |
Processos eletrolítico para a produção de chumbo metálico partindo de pastel de chumbo dessulfurizado, e para dessulfurização de um pastel de chumbo contendo enxofre |
摘要 |
<p>The present invention relates to an electrolytic process for producing metallic lead starting from desulfurized lead pastel comprising the following operative phases: a) leaching the desulfurized pastel by putting it in contact with a solution comprising ammonium chloride, with the formation of a leach liquor and evolution of gaseous CO2; b) separating a first solid residue and a first clarified leach liquor from the leach liquor coming from phase a); c) leaching the solid residue separated in phase b) by putting it in contact with a solution comprising ammonium chloride and hydrogen peroxide; d) separating a second solid residue and a second clarified leach liquor from the leach liquor coming from phase c); e) joining the first clarified leach liquor coming from phase b) with the second clarified leach liquor coming from phase d) and forming a single solution; f) subjecting the solution leaving phase e) to electrolysis in a flow cell, with a current density ranging from 50 to 10,000 A/m2, said electrolysis resulting in the formation of a lead sponge. The present invention also relates to the relative desulfurization process of the pastel.</p> |
申请公布号 |
BRPI0820645(A2) |
申请公布日期 |
2015.06.16 |
申请号 |
BR2008PI20645 |
申请日期 |
2008.11.27 |
申请人 |
ENGITEC TECHNOLOGIES S.P.A. |
发明人 |
MARCO OLPER;MASSIMO MACCAGNI;SILVANO COSSALI |
分类号 |
C22B7/00;C22B13/00;C25C1/18 |
主分类号 |
C22B7/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|