Crystalline phase evolution and solid-state reaction mechanisms in high-titanium pellets during oxidation roasting
Year: 2025
Type: article
Abstract: This study aims to clarify the crystalline phase evolution and solid-state reaction mechanisms during the hardening process of high-titanium vanadium-titanium magnetite pellets. The experimental results showed that both increasing preheating-roasting temperature and extending preheating-roasting time were beneficial for the acquisition of compressive strength of preheated and roasted pellets. The pseudo-brookite exhibited preferred orientation during the preheating stage, which facilitated inter-particle bonding and improved the consolidation of preheated pellets. Subsequent roasting treatment demonstrated that pseudo-brookite developed superior microhardness characteristics, providing critical skeletal reinforcement that significantly contributed to the overall mechanical integrity of the roasted pellets. The suitable preheating parameters for high-titanium vanadium titanium magnetite were set to 900 °C for 20 min, and roasting parameters were set to 1100 °C for 20 min. Consequently, the strength of preheated and roasted pellets reached 527 and 2808 N, respectively, which could meet the actual production requirements.
Authors: Jue Tang, Sinan Li, Jinge Feng, Jile Qin, Zichuan Zhao, Xicai Liu, Mansheng Chu, Hongyu Tian
Institution: Northeastern University
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,640
Funders: National Natural Science Foundation of China, Key Technologies Research and Development Program, National Key Research and Development Program of China, Fundamental Research Funds for the Central Universities, Fundamental Research Funds for Central Universities of the Central South University, Key Research and Development Program of Liaoning Province
OpenAlex ID: W7082978182