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Refining and Concentrating of CuSO4 Solution Produced by Leaching of Copper Oxide Ores and Production of Nano CuO

Fathi Zahmatkesh, Amir Reza | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50386 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Yuzbashizadeh, Hossein; Halali, Mohammad
  7. Abstract:
  8. In this research copper oxide ores were dissolved under acidic condition. Chemical analysis (XRF) and X-Ray diffraction analysis (XRD) were used to identify the phases and determine the percentage and amount of the elements in the mineral. The results showed that the mineral contains 4.464% by weight of copper, which is malachite in mineral. The experimental design method (DOE) was used to dissolve concentrate by sulfurice acid. The parameters of temperature, time, acid concentration and solid to liquid ratio, as well as the interaction of these parameters on leaching and optimization of parameters were also done by response surface method (RSM). To determine the amount of copper dissolved, Atomic absorption spectroscopy analysis was used. The results showed that the leaching of copper with a temperature of about 45°c, time of about 84.68 minutes , an acid concentration of 1.49 M and solid to liquid ratio of 0.19 g/mL provided optimal conditions for copper leaching. Precipitation method was used to purify impurities after oxidation of Fe2+ to Fe3+ by H2O2 and other imputities were also removed from copper contining PLS solution by this method. Copper hydroxide precipitate from residual solution and then copper nano oxide was synthesised by calcination. The copper nano oxide synthesized was investigated by X-Ray diffraction analysis, Dynamic light scattering (DLS) and Field Emission Scanning Electron Microscope (FESEM) based on the results of XRD analysis, the Tenorite phase was identified as the main phase , and the crystallite size also was determined by the scherrer equation 40nm. According to the FESEM analysis , particle size below 100nm was observed and according to DLS analysis the average particle size was 85.5nm and D90 was reported below 100nm
  9. Keywords:
  10. Leaching ; Copper Recovery ; Experiments Design ; Precipitation ; Copper Nanooxide

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