Shaoxiang Yang, Jiayu Feng
Zinc-containing solid wastes (ZCSW) from the steel industry pose significant environmental risks due to hazardous heavy metals like zinc, iron, and lead. This study proposes a synergistic ammonia-acid leaching strategy for co-processing blast furnace dust (BFD) and secondary zinc oxide (SZO) to achieve resource recovery and pollution mitigation. The ammonia leaching selectively extracted 70.62–88.08% of Zn while suppressing Fe and Pb dissolution, facilitated by optimized (NH 3·H2O]/[NH4HCO3] ratios (1:1) and pH (9.84). Subsequent acid leaching (3.24 mol ·L-1 HCl, 50 °C) effectively dissolved residual Zn (95.7%) and Pb by leveraging BFD’s reducibility to oxidize refractory ZnS in SZO. Selective metal recovery was achieved through pH-controlled precipitation: Fe³⁺ was removed as Fe2O3 at pH 5, Pb via Zn displacement, and ZnCO3 via ammonium bicarbonate addition. The integration of BFD enhanced ZnS leaching efficiency, while mixed waste ratios (e.g., 3:1 BFD/SZO) optimized elemental separation, converting residues into Fe-enriched (73.42%) materials. This waste-to-waste approach enables simultaneous Zn, Fe, and Pb recovery with <1% residuals, offering a sustainable solution for ZCSW management by bridging resource scarcity and environmental challenges.
@article{0a86e1fa-0b26-4610-b02b-aa1c6b4f9f45,
title={New strategy for recovering Pb, Fe, and Zn from blast furnace dust and zinc oxide via ammonia-acid co-leaching},
author={Shaoxiang Yang and Jiayu Feng},
year={2026},
language={en}
}TY - JOUR TI - New strategy for recovering Pb, Fe, and Zn from blast furnace dust and zinc oxide via ammonia-acid co-leaching AU - Shaoxiang Yang AU - Jiayu Feng PY - 2026 LA - en ER -
Jirang Cui, Hans Jørgen Roven
Rapid growth in electronic equipment consumption has generated large quantities of electronic waste containing hazardous substances and high-value met
MBUYA MWASHI JOSUE, MUSENGA OMBA VENUS
Ce projet académique s'inscrit dans le cadre des études en métallurgie générale, visant à explorer les procédés d'extraction des métaux à partir de mi
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