Herald of Technological University Herald of Technological University ВЕСТНИК ТЕХНОЛОГИЧЕСКОГО УНИВЕРСИТЕТА 3034-4689 59753 ПРИКЛАДНАЯ ХИМИЯ И ХИМИЧЕСКАЯ ТЕХНОЛОГИЯ ПРИКЛАДНАЯ ХИМИЯ И ХИМИЧЕСКАЯ ТЕХНОЛОГИЯ THE CEMENTATION OF NICKEL FROM AMMONIACAL SOLUTION BY SUSPENDED ALUMINIUM PARTICLES Grigoryeva I O Grigoryeva I O iren-grigor@mail.ru Dresvyannikov A F Dresvyannikov A F Department of electrochemical technology and industry KNRTU ru Department of electrochemical technology and industry KNRTU ru Department of analytical chemistry, certification and quality management KNRTU ru Department of analytical chemistry, certification and quality management KNRTU ru 01 08 2025 01 08 2025 15 22 31 34 19 04 2023 https://vestniktu.ru/en/nauka/article/59753/view

В работе показана возможность извлечения металлического никеля из аммиачных растворов путем цементации, используя в качестве восстановителя алюминиевый порошок. Показано, что высокая скорость восстановления никеля достигается при высоких концентрациях аммиака и гидроксида натрия в растворе. Установлено, что в интервале температур от 20 до 60 ° C скорость процесса лимитируется диффузией, при температуре выше 60 ° C происходит нарушение равновесия в растворе, что приводит к осаждению главным образом Ni ( OH ) 2 .

This paper examines the possibility of recovering metallic Ni from ammoniacal solution via cementation, using Al powder as the reductant. The kinetic behavior of the cementation with aluminum spherical micro- and nanosized particles in laboratory reactor was investigated. The influence of parameters such as concentration, pH and temperature was studied in an intermittent state. The highest recovery rates were achieved with high liquid ammonia and moderate sodium hydroxide concentrations. From 20 to 60 ° C diffusion is rate-controlling and above 60 ° C the solution equilibrium is broken and Ni(OH) 2 is mainly precipitated.

nickel ammoniacal solution cementation suspended aluminum micro- and nanosized particles никель аммиачный раствор цементация суспензированные микро- и наночастицы алюминия nickel ammoniacal solution cementation suspended aluminum micro- and nanosized particles никель аммиачный раствор цементация суспензированные микро- и наночастицы алюминия

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