Effect of sodium alkyl sulfates on electrodeposition of manganese metal from sulfate solutions in the presence of sodium metabisulphite

Electrochemical Behaviors of MnO2 on Lead Alloy Anode during Pulse Electrodeposition for Efficient Manganese Electrowinning

“…Insoluble lead alloy anodes are widely used for electrometallurgy owing to their high conductivity and advantageous corrosion resistance in acidic sulfate solutions, − one of which is manganese (Mn) electrowinning process. , Manganese is an important industrial material used as an additive for the production of raw steel and special alloys in nonferrous metallurgy. − Mn metal is conventionally produced from an electrolytic reduction of manganese and ammonium sulfate solution in a diaphragm cell. Pb (99%) and 1% Ag alloy is a typical anode material for Mn electrowinning .…”

Research on the Use of Low-Selenium Additives in the Electrodeposition of Manganese Metal and Co-production of Electrolytic Manganese

“…Analysis indicated that the addition of SDS as an auxiliary additive forms a passivation film on the electrode surface, reducing by-product generation, hindering the dissolution of electrode materials, and enhancing the electrochemical stability of Mn electrolysis 30 . At lower SDS concentrations, the activation energy of crystal faces is reduced, facilitating nucleation, thus increasing current efficiency and reducing energy consumption 29 . However, as the SDS concentration increased, the cathodic solution became increasingly turbid during electrolysis, diminishing the permeability of the ion exchange membrane.…”

The Electrochemical Performance and Reaction Mechanism of Coated Titanium Anodes for Manganese Electrowinning

“…Anodes has no significant effect on the morphology of cathode manganese, and both manganese metal are composed of cabbage like crystallites. 9 Composition of the by-product MnO 2 of both Ti/Ru 1/3 Sn 2/3 O 2 CTAs and Pb anode are listed in Table II, the manganese contents of both by-product are higher than 50%. From this point of view, it is a huge waste of manganese resources if the anode slime is stocked, for the manganese content in manganese oxide ore is generally below 30%.…”

“…Consequently, the anode overpotential of manganese electrowinning is even 300mV higher than that of zinc electrowinning, causing enormous energy loss. 8,9 As a matter of fact, for the electrowinning of metal z E-mail: hjguo_csu@163.com from aqueous sulfate solution in hydrometallurgy, the anode overpotentials are often much higher than that of metal deposition reaction on cathode, whether the electrowinning of zinc, nickel or the electrowinning of manganese, copper from aqueous sulfate solution. 10 As OER is the main anodic reaction in these processes, many researchers have been focusing on developing suitable anodes to decrease the energy consumption in the electrowinning process.…”