Segmentation Effect of 4-Contact Insulators on Reducing Short Circuits and Energy Consumption in Copper Refineries

Short circuits are a known challenge in electrorefining, often resulting in production downtime, noticeable increase in energy consumption per tonne of plating, safety concerns, and costly maintenance. To address this, an innovative solution known as segmented 4-contact insulators has been developed to decrease the incidence of short circuits while also significantly lowering energy usage and achieving notable cost savings. This research presents an advanced version of capping board insulators called “4-contact Ecolectrik,” which is engineered to uphold the efficiency of cellhouse operations even when faced with a bad contact or short circuit. The 4-contact design features four independent electrical contacts, providing redundant electrical pathways and enhancing fault tolerance. The design objectives are confirmed through electric circuit simulations across various short-circuit and bad contact scenarios. The analysis reveals that the segmented design of these insulators localizes the effects of short circuits, and the use of bypass secondary contact bars that supply the electrodes from the insulated end in the event of a bad contact results in more uniform and reliable distribution of cell voltage and current. Additionally, an assessment of electric current distribution within a cellhouse indicates that employing this type of insulator could lead to energy consumption reductions of up to 23% per tonne of plating. The adoption of these insulators also improves the overall safety of the refining process by reducing the risk of electrical hazards associated with short circuits. With a proven track record in demanding refinery environments, these insulators offer a reliable and cost-effective solution for short circuit protection in copper refineries. Moreover, by enabling better control of the refining process, these insulators contribute to higher quality metal production, minimized waste, and enhanced sustainability, particularly in areas where electricity is sourced from fossil fuel power plants utilizing coal or oil and result in a reduced carbon footprint.