Selective Oxidation Control for Synchronous Vanadium Extraction and Chromium Retention from Vanadium- and Chromium-Bearing Hot Metal
Year: 2025
Type: article
Abstract: To address the technical challenges in the resource utilization of hot metal containing high levels of vanadium (V: 2–5%) and chromium (Cr: 1–5%), this paper proposes a novel method based on pyrometallurgical selective oxidation for the simultaneous extraction of vanadium and retention of chromium. Through thermodynamic analysis and high-temperature smelting experiments, the competitive oxidation behaviors of carbon, vanadium, and chromium were revealed, and the synergistic control mechanism of temperature and oxygen partial pressure was clarified. The results indicate that within the temperature range of 1693–1753 K, vanadium preferentially oxidizes over carbon and chromium, while carbon effectively suppresses chromium oxidation. By optimizing the ω(FeO) (10.0–15.7%), achieving a vanadium oxidation efficiency (ηV) of 72.5–82.2% and maintaining the chromium retention efficiency (1–ηCr) exceeding 57.1%. Compared to traditional methods—which rely on high-oxygen blowing (oxygen supply: 43–195 kg/tFe), multi-stage roasting, and hydrometallurgical refining—this approach eliminates roasting and hydrometallurgical steps, shortens the process chain, reduces oxygen consumption (> 80 kg/tFe), and lowers environmental risks (Cr oxidation reduced > 40%). The study establishes a theoretical framework for sustainable V/Cr separation, enhancing resource efficiency and minimizing pollution.
Source: Metals
DOI: 10.3390/met15111275
Authors: Xin-yu Wang, Yuan-hong Qi, Hai-quan Zhao, Lu-feng Wang, Qiao-chu Liu, Ding-liu Yan, Feng Wang
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,137
Award: G6605704608
OpenAlex ID: W7106209512