Due to its inherent electrochemical properties, lead has long been an essential part of electrolytic refining technology. The performance of anodes is one of the most critical factors in maximizing efficiency in any hydro-metallurgical process and has a direct impact on the grade of finished product. Lead alloy anodes are commonly used in the electrowinning and plating of metals such as copper, nickel, manganese and zinc.
Rolled lead-calcium-tin, lead-antimony and lead-silver alloys are preferred in such applications because of their high resistance to the acid used in electrolytic solutions. They are also less prone to corrosion caused by interaction with fluoride electrolytes and acids. They play a key role in maximizing extraction process quality, minimizing maintenance needs and optimizing energy utilization. When leaching oxide ores with acid, electrowinning plants use electrolysis to collect copper on steel cathodes and employ inert lead anodes to complete the electrical circuit. One of the biggest advantages of this method is that low grade ores that would be uneconomic to smelt become economic to leach.
Management of the lead oxide layer is key to enhanced anode performance in harsh environments. GLT Anodes has a highly skilled team who can assist with design, manufacturing, installation and testing in relation to specialised lead anode applications. Technical support is routinely supplied. This enables our clients to: