01.Sep.2020
The effects of some experimental parameters on the copper leaching process were investigated and presented in a previous article, while in the current article kinetic models to represent the effects of leaching temperature, acid concentration, and ore particle size on the leaching rate will be examined and analyzed. The obtained results showed that none of the surface chemical reaction or the pore diffusion on its own can control the whole copper dissolution process. The mixed kinetics model which includes two different leaching processes including the surface chemical reaction and diffusion through a porous product layer was found to be suitable for describing and fitting the experimental data up to 65 % copper dissolution (X) at a high stirring speed of 1000 rpm. The apparent activation energies for pore diffusion and surface reaction were estimated to be 12.26 and 9.61 kcal/mol, respectively. Values of surface reaction rate constant in the range from 6.35´10-4 to 5.49´10-3 cm/sec and pore diffusion coefficient in the range from 3.58´10-8 to 2.36´10-7 cm 2 /sec have been obtained.https://www.researchgate.net/publication/344451958_Kinetics_of_Hydrochloric_Acid_Leaching_of_Copper_from_its_Ore
The effects of some experimental parameters on the copper leaching process were investigated and presented in a previous article, while in the current article kinetic models to represent the effects of leaching temperature, acid concentration, and ore particle size on the leaching rate will be examined and analyzed. The obtained results showed that none of the surface chemical reaction or the pore diffusion on its own can control the whole copper dissolution process. The mixed kinetics model which includes two different leaching processes including the surface chemical reaction and diffusion through a porous product layer was found to be suitable for describing and fitting the experimental data up to 65 % copper dissolution (X) at a high stirring speed of 1000 rpm. The apparent activation energies for pore diffusion and surface reaction were estimated to be 12.26 and 9.61 kcal/mol, respectively. Values of surface reaction rate constant in the range from 6.35´10-4 to 5.49´10-3 cm/sec and pore diffusion coefficient in the range from 3.58´10-8 to 2.36´10-7 cm 2 /sec have been obtained.
https://www.researchgate.net/publication/344451958_Kinetics_of_Hydrochloric_Acid_Leaching_of_Copper_from_its_Ore
17.Apr.2024
16.Jan.2024
20.Sep.2023
أنا طالبة في الهندسة الصناعية, اختياري لهذا التخصص كان بناءً على أهميته الكبيرة كمهنة في الحاضر والمستقبل ... رغد بركات
الهندسة الصناعية تساعدك على اتخاذ قرارات أفضل، وتعطي أشكالا أخرى من مبادئ الهندسة بشكل عملي وعلمي في آن. ... محمود صلاح
قسم الهندسة الكيميائية قسم جميل جدا تعلمت فيه الكثير ومما تعلمته فيه جدية العمل وروح الفريق الواحد .. ... رغد الشويكي