MMO Titanium Anode for Metal Electrowinning

In the electrowinning industry, lead dioxide anode and Mixed Metal Oxide (MMO) anode are the two common choices. However, the lead dioxide anode are found of these disadvantages: heavy environmental pollution, high energy consumption, fragile, lead waste, hardly to produce into various shapes, coating is easily to drop off.

With environmental concerns increasing and pollution stringent control,  MMO anodes become widely used in  the metal electrowinning industry since this MMO titanium anode for metal electrowinning offer a cleaner alternative and significant power savings over  lead dioxide anode.

MMO electrode for metal electrowinning

This MMO anodes are exclusively used in the  metal recovery system. The system is composed of  the deposition of an electrolytic cell at the cathode, in the metal you want to obtain. MMO coated Titanium Anodes that are immersed in a fluidised bed of non-conducting particles , this ensures that there are high levels of mass transport and low power requirements. The metal recovery system is used for the efficient recovery of metals from dilute solutions where conventional electrolysis cannot be considered.

MMO electrode for metal electrowinning

The metals that can be recovered by this method are copper, nickel, zinc and cobalt, and used in the recovery of cyanide-based electrolytes of gold, silver, copper, zinc and cadmium  cyanide is electrochemically destroyed, due to the enhanced anode efficiency. Different metals plate out at different voltages so application if the different voltages will allow all metals to be recovered from a mixed metal effluent.

Titanium substrate shapes: squares,rectangular sheets, strips, foils, plates, expanded metal and meshes, corrugated and perforated metal plates, wires, rods, discs, bars,tubes or according to clients' requirements.

Coating:Including but not restricted to:  iridium coating (Ir and IrO2), ruthenium coating (Ru and RuO2), and platinum coating orplatinized (Pt, PtOx),.titanium dioxide (TiO2),  niobium pentoxide (Nb2O5) and tantalum pentoxide (Ta2O5) or a combination to address any specific situation.   

Titanum anode operating lifespan: Up to clients’ specific requirements. Generally, the circulated electric charge per unit surface area, It reaches several millions of ampere-hours per square meter (MAh/m2).  Moreover, the consumption rate of the mixed metal oxides coating is usually low in the order of few milligrams per ampere-year that ensures a long service life.

Elade is able to supply both new anodes and the recoating and repair service for anodes used for all of these processes, in particular the formulation of the coating for sulfate, has been designed to have a long duration and a low energy consumption.