Method of recovering manganese, lead and silver from electrolytic zinc anode mud

A technology for electrolysis of zinc and anode slime, applied in the fields of lead, silver, and manganese recovery, can solve the problem of unrealized manganese separation, etc., and achieve the effects of low production cost, less equipment investment, and enrichment and recovery.

Inactive Publication Date: 2017-05-31
GUIZHOU HONGDA ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also researchers who have recycled electrolytic zinc anode slime, such as the patent No. 201110091813.2, a method of direct leaching of electrolytic zinc anode slime manganese dioxide using electrolytic zinc anode slime manganese dioxide as raw material for wet recovery of metal manganese. Send the massive and flaky manganese dioxide raw materials into the ball mill for ball milling. After the manganese dioxide raw materials are ball milled by the ball mill, they will directly enter the pulping tank for pulping, and remove heavy metal impurities from the pulped leaching solution to obtain qualified manganese sulfate solution. Supply electrolytic zinc manufacturers to meet the requirements of electrolytic zinc for manganese; it can be seen that it only recycles electrolytic zinc anode slime, and does not realize the separation of manganese, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 utilizes diaphragm electrolyzer to electrolyze

[0032] Use 120g / L of H for the electrolytic zinc anode slime 2 SO 4 The solution is slurried according to the liquid-solid ratio L / S=6, and stirred at a temperature of 80°C for 1 hour;

[0033] The above slurry is injected into the cathode area of ​​the diaphragm electrolyzer and stirred, with graphite as the anode and stainless steel as the cathode, the flow density is 350A / m 2 , Tank voltage 2.8V, electrolysis temperature 50 ℃, leaching electrolysis time 8h.

[0034] The electrolytic slurry in the cathode area is released and filtered to obtain filter residue and filtrate.

[0035] Detection: the filtrate contains H 2 SO 4 54.77g / L, Zn 2.12g / L, Mn 18.54g / L; filter residue contains Mn4.72%, Zn1.14%, Pb43.68%, Ag691g / t, residue rate 45.31%, Mn leaching rate 92.03%.

Embodiment 2

[0036] Embodiment 2 utilizes diaphragm electrolyzer to electrolyze

[0037] Use 180g / L of H for the electrolytic zinc anode slime 2 SO 4 The solution is slurried according to the liquid-solid ratio L / S=8, and stirred at a temperature of 85°C for 1 hour;

[0038] The above slurry is injected into the cathode area of ​​the diaphragm electrolyzer and stirred, with graphite as the anode and stainless steel as the cathode, the flow density is 500A / m 2 , Tank voltage 3.8V, electrolysis temperature 55°C, leaching electrolysis time 10h.

[0039] The electrolytic slurry in the cathode area is released and filtered to obtain filter residue and filtrate.

[0040]Detection: the filtrate contains H 2 SO 4 96.15g / L, Zn1.31g / L, Mn16.39g / L; filter residue contains Mn2.35%, Zn.072%, Pb45.33%, Ag714g / t, residue rate 43.72%, Mn leaching rate 96.14%.

Embodiment 3

[0041] Embodiment 3 Utilizes diaphragm electrolyzer to electrolyze

[0042] Use the filtrate after electrolysis in Example 2 for the electrolytic zinc anode slime, add sulfuric acid to it to a solution with a concentration of 200g / L, then adjust the slurry according to the liquid-solid ratio L / S=8, and stir at a temperature of 90°C for 1 hour;

[0043] The above slurry is injected into the cathode area of ​​the diaphragm electrolyzer and stirred, with graphite as the anode and stainless steel as the cathode, the flow density is 500A / m 2 , Tank voltage 3.5V, electrolysis temperature 60 ℃, leaching electrolysis time 12h.

[0044] The electrolytic slurry in the cathode area is released and filtered to obtain filter residue and filtrate.

[0045] Detection: the filtrate contains H 2 SO 4 113.62g / L, Zn0.95g / L, Mn29.44g / L; filter residue contains Mn1.64%, Zn.056%, Pb46.17%, Ag728g / t, slag rate 42.47%, Mn leaching rate 97.4%, The contents of Pb and Ag in the leaching slag were e...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to the technical field of hydrometallurgy, and in particular to a method of recovering manganese, lead and silver from electrolytic zinc anode mud. Manganese in the electrolytic zinc anode mud of a cathode region is reduced and leached by means of a diaphragm electrolysis method, and hydrogen is generated on a cathode. Under the stirring action of the cathode region, reduction leaching of manganese dioxide can be enhanced, so that the leaching efficiency of manganese dioxide reaches 95% above; lead sulfate and a compound of silver enter cathode leaching residues to be enriched. In an anode region of a diaphragm electrolyzer, almost leached manganese sulfate is electrolytically oxidized to manganese dioxide and is deposited on an anode plate or in the bottom of the anode region, and a small part of manganese sulfate residues are left in the electrolyte and are returned to an electrolytic zinc system to supplement manganese ions. In the electrolytic process, graphite is taken as the anode, so that the purity of manganese dioxide reaches 80% above.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for recovering manganese, lead and silver from electrolytic zinc anode slime. Background technique [0002] Electrolytic zinc anode slime is during the zinc electrolysis process, manganese ions are discharged on the anode, precipitated and oxidized to form manganese dioxide, which is insoluble in acid, and falls into the electrolytic tank, while the lead-silver anode plate will also be electrolyzed during the electrolysis process. Chemistry and Cl - Corrosion, falling into the electrolytic cell in the form of precipitate, mixed with manganese dioxide to form electrolytic zinc anode slime, electrolytic zinc anode slime is mainly composed of MnO 2 , PbSO 4 , AgCl, zinc sulfate, etc., in the process of electrolytic zinc, it needs to be cleaned regularly, but because the manganese dioxide in the electrolytic zinc anode slime is crystalline, oxidizing, insoluble in ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/10C25C1/18C25C1/20
CPCC25C1/10C25C1/18C25C1/20
Inventor 李世平曾光祥韦国龙周代江杨跃文王志斌
Owner GUIZHOU HONGDA ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap