Результаты исследований: Вклад в журнал › Статья › Рецензирование
Результаты исследований: Вклад в журнал › Статья › Рецензирование
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TY - JOUR
T1 - Kinetics of nitric acid leaching of bornite and chalcopyrite
AU - Shklyaev, Yuri
AU - Dizer, Oleg
AU - Lugovitskaya, Tatiana
AU - Golovkin, Dmitry
AU - Rogozhnikov, Denis
N1 - This work was funded by the Russian Science Foundation Project No. 22-79-10290. Analytical studies were carried out with the financial support of the State Task of the Russian Federation under Grant No. 075-03-2021-051/5 (FEUZ-2021-0017).
PY - 2023
Y1 - 2023
N2 - The paper presents a study of the process of nitric acid dissolution of the natural minerals chalcopyrite and bornite. The influence of various parameters, including temperature, nitric acid concentration and particle sizes, on this process was examined. Based on the data obtained, the values of apparent activation energy (57.41 and 42.98 kJ/mol for chalcopyrite and bornite, respectively), empirical orders with respect to nitric acid (1.62 and 1.57 for chalcopyrite and bornite, respectively) and with respect to particle size (–1.16 and –2.53 for chalcopyrite and bornite, respectively) were calculated using the shrinking core model. Generalized kinetic equations for the dissolution process of both minerals were derived. Based on the calculations performed, it was suggested that the dissolution processes of chalcopyrite and bornite under these conditions are limited by internal diffusion.
AB - The paper presents a study of the process of nitric acid dissolution of the natural minerals chalcopyrite and bornite. The influence of various parameters, including temperature, nitric acid concentration and particle sizes, on this process was examined. Based on the data obtained, the values of apparent activation energy (57.41 and 42.98 kJ/mol for chalcopyrite and bornite, respectively), empirical orders with respect to nitric acid (1.62 and 1.57 for chalcopyrite and bornite, respectively) and with respect to particle size (–1.16 and –2.53 for chalcopyrite and bornite, respectively) were calculated using the shrinking core model. Generalized kinetic equations for the dissolution process of both minerals were derived. Based on the calculations performed, it was suggested that the dissolution processes of chalcopyrite and bornite under these conditions are limited by internal diffusion.
UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85179100961
UR - https://elibrary.ru/item.asp?id=60040551
U2 - 10.15826/chimtech.2023.10.4.10
DO - 10.15826/chimtech.2023.10.4.10
M3 - Article
VL - 10
JO - Chimica Techno Acta
JF - Chimica Techno Acta
SN - 2409-5613
IS - 4
M1 - 202310410
ER -
ID: 49829836