Hossein Shalchian, Payam Ghorbanpour
The selective removal of impurities from molybdenite concentrates is crucial for producing high-purity molybdenum products. In this study, the purification of molybdenite concentrate was investigated using nitric acid as both a leaching medium and oxidizing agent. Leaching experiments were carried out under various conditions of temperature (22–78 ◦C) and nitric acid concentration (0.12–0.48 M). The results demonstrated that while molybdenite remained mostly undissolved, copper and iron were effectively leached, with near-complete removal at 78 ◦C in 0.24 M HNO3 after 6 h. Compared with other acid systems, nitric acid leaching experiments in this study demonstrated higher efficiency and selectivity under relatively moderate conditions of concentration and temperature. Kinetic analyses were performed based on the shrinking core model, indicating that temperature exerted the strongest effect on Mo dissolution, while acid concentration showed a lower effect in comparison with temperature.
@article{4610231b-0c82-4b65-87b7-b33845fc9464,
title={2025 Shalchian Nitric acid purification kinetics of molybdenite},
author={Hossein Shalchian and Payam Ghorbanpour},
year={2026},
language={en}
}TY - JOUR TI - 2025 Shalchian Nitric acid purification kinetics of molybdenite AU - Hossein Shalchian AU - Payam Ghorbanpour PY - 2026 LA - en ER -
Christian Kabange
This document describes the purification and precipitation circuit for cobalt at TFM, from LG raffinate through to cobalt hydroxide production. It exp
The leachability tests for manufacturing scrap TV boards (STVB) have indicated the release of metals beyond the limit levels with potential problems f
This paper addresses the challenge of assessing the feasibility of wind power plant projects at sites with insufficient or no local historic wind data
Important advances in electrochemical engineering technology over the last three decades have fostered the development of a lternative methods to alle