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Recovery ofRecycling criticalExtraction metalsMetal such as nickelNickel (Ni), tinTin (Sn), and ironIron (Fe) from secondary resourcesSecondary resources is essential due to metalMetal scarcity and environmental concerns. Present studies explore leachingLeaching behaviour and kineticKinetics modelling of Ni–Sn–Fe alloy powders (Ni: 25–30%, Sn: 12–17%, Fe: 5–10%) generated as industrial waste. LeachingLeaching studies were made varying experimental parameters, i.e. concentration of acid, volume of oxidant, pulp density, agitation speed, time, and temperature. MetalMetal dissolution of ~99.99% was achieved using 20–25% HCl (v/v) and 10% H2O2 (v/v) at 75–100 °C for 2–3 h, with 100 g/L pulp density and 400 rpm agitation. Recovered metalsMetal were obtained as sheets, saltsSalts, and powders using electrowinningElectrowinning and precipitation techniques, respectively. KineticsKinetics of the leachingLeaching was fitted well with proven model and validated with SEM–EDS results. The results of the studies will be useful for process development after scale-up and pilot trials.

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Leaching Kinetics with Modelling for the Dissolution of Ni, Sn, and Fe from Scrap Alloy

  • 会议论文

  • 发表日期：

    2026年

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  • Ankur Sharma,
  • Karina Rani,
  • Subrat Shekhar,
  • Manis Kumar Jha

摘要

Recovery ofRecycling criticalExtraction metalsMetal such as nickelNickel (Ni), tinTin (Sn), and ironIron (Fe) from secondary resourcesSecondary resources is essential due to metalMetal scarcity and environmental concerns. Present studies explore leachingLeaching behaviour and kineticKinetics modelling of Ni–Sn–Fe alloy powders (Ni: 25–30%, Sn: 12–17%, Fe: 5–10%) generated as industrial waste. LeachingLeaching studies were made varying experimental parameters, i.e. concentration of acid, volume of oxidant, pulp density, agitation speed, time, and temperature. MetalMetal dissolution of ~99.99% was achieved using 20–25% HCl (v/v) and 10% H2O2 (v/v) at 75–100 °C for 2–3 h, with 100 g/L pulp density and 400 rpm agitation. Recovered metalsMetal were obtained as sheets, saltsSalts, and powders using electrowinningElectrowinning and precipitation techniques, respectively. KineticsKinetics of the leachingLeaching was fitted well with proven model and validated with SEM–EDS results. The results of the studies will be useful for process development after scale-up and pilot trials.