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Optimization and Kinetics of Chalcopyrite Leaching in the Presence of Hydrochloric and Nitric Acids, along with a Particle Shape-Based Evaluation

TUGBA DENIZ TOMBAL, ILGIN KURSUN

2022enchalcopyriteleachinghydrochloric acidnitric acidmetallurgy

Abstract

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The extraction of copper (Cu) from chalcopyrite (CuFeS2) using hydrometallurgical methods has garnered increased attention globally, particularly utilizing hydrochloric (HCl) and nitric acids (HNO3) as key lixiviants. This study aims to determine optimal leaching conditions for chalcopyrite, finding that dissolution efficiencies (DEs) of 95% for HCl and 96% for HNO3 were achievable under optimal parameters. Kinetic modeling revealed that the reaction rates were diffusion-controlled, with correlation coefficients of 0.9955 for HCl and 0.9956 for HNO3. Additionally, particle shape analysis post-leaching demonstrated a shift towards more circular morphologies, with HCl yielding less concave and more rounded particles, while HNO3 produced more angular and concave shapes. The findings indicated that optimal leaching can be achieved at a particle size of 63-75 µm, 15% solids ratio, 120 minutes of leaching time, and 250 rpm stirring speed. Variations in morphological properties were further influenced by lixiviant concentration, temperature, and type of acid used. This comprehensive analysis underscores the importance of suitable leaching conditions in enhancing chalcopyrite beneficiation efficiency.

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Cite This Work

@article{ca23305e-89f9-47df-bf4a-9db24619d2c6,
  title={Optimization and Kinetics of Chalcopyrite Leaching in the Presence of Hydrochloric and Nitric Acids, along with a Particle Shape-Based Evaluation},
  author={TUGBA DENIZ TOMBAL and ILGIN KURSUN},
  year={2022},
  language={en}
}
TY  - JOUR
TI  - Optimization and Kinetics of Chalcopyrite Leaching in the Presence of Hydrochloric and Nitric Acids, along with a Particle Shape-Based Evaluation
AU  - TUGBA DENIZ TOMBAL
AU  - ILGIN KURSUN
PY  - 2022
LA  - en
ER  -

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