RESEARCHING OF INFLUENCE OF TUNGSTEN, SILICON AND IMPURITIES OXIDATION ON ELECTROLYTIC DISSOLUTION OF CU-ZN AND FE-NI-CO ANODES
Journal Title: Periódico Tchê Química - Year 2017, Vol 14, Issue 28
Abstract
The conditions for the recycling of electronic equipment are an urgent task and highly dependent on environmental regulations and requirements. Modern technologies of recycling of electronic waste need to meet the increasing demand for metals and meet the requirements. Extraction of precious and non-ferrous metals from waste microelectronics is more beneficial than obtaining them from their ores. The development of an integrated waste recycling technology of microelectronics requires a thorough and comprehensive approach. Compositions of the concentrates and anodes are presented in the article. The compositions of the anodes were analyzed on X-ray fluorescence spectrometer Lab Center XRF-1800. Measurements were conducted of the potentials of the anodes of different composition and in different electrolytes. The role of the oxidant impurities that affected to progress of electrolytic dissolution was defined. It is concluded that silicon can be used as an impurity, which can be used to regulate and control the process of electrochemical dissolution. The addition of silicon during melting of anodes allows to avoid the process of passivation of the alloy in sulfuric acid electrolyte. Tungsten can be a collector for gold. The oxidation of tungsten is a necessary condition for reducing the loss of gold.
Authors and Affiliations
ALEXANDROVA T. A.
Keywords
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