Methodology For Recovery The Precious Metals Gold And Silver And Group The Platinum In Electronic Waste

Abstract:

In this work is developed in the laboratory a methodology for extracting the precious metals gold and silver and platinum group (palladium, iridium, rhodium and platinum) present in electronic waste. To determine this, it examines the state of the art in the recovery of metals from electronic waste, selected, prepared and characterized by SEM techniques and X-ray diffraction eight types of electronic components found in electronic waste are defined and mounted experimental techniques via hydrometallurgical and electrolytic recovery under a fractional factorial statistical model that presents the data of the response variable.Electronic components correspond to the categories called pin serial and parallel port card, RAM, processor pins, integrated surface, diodes, resistors, capacitors, and transistor; components which together are subjected to mineral recovery stages of size reduction , magnetic separation, selective leaching, electrowinning, cementation, refining and metal collection.The fundamental stage selective leaching gradually develops through the sequence aluminum, lead - tin, copper, precious, nickel - zinc, platinum group, controlling and operating the electrochemical variables to obtain liquor input stage electrowinning .Liqueurs metal species recorded for the gold, silver and platinum group is subjected to electrowinning defining the parameters of current density, pH, residence time and temperature in the electrowinning cell. The remaining liquor will be subjected to chemical analysis to recognize the metal fraction content and set the corresponding mass balance.

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