20120067719 | SYSTEM FOR THE SUPERPOSITION OF ALTERNATING CURRENT IN ELECTROLYSIS PROCESSES - A system is submitted here that permits superimposing an alternating current in the process of electrolytic refining of metals based on the use of power semiconductors without requiring an external source and which minimizes the utilization of passive elements, achieving a high efficiency solution applicable to high power industrial processes. The invention consists of the division of the cells involved in the metals electrolysis process in two groups of cells ( | 03-22-2012 |