|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials 2021
||Effect of MgO on Oxidation of Vanadium Slag at High Temperature
||Liu Liang, Diao Jiang, Qiu Yiyu, Li Hongyi, Xie Bing
|On-Site Speaker (Planned)
Based on considerations of making full use of the residual heat of vanadium slag and exploring a novel green vanadium extraction process, this paper employs MgO as the roasting additive, blows oxygen into the molten vanadium slag, and uses the residual heat of the vanadium slag for roasting at high temperature. The influence of MgO on the phase structure of vanadium slags during oxidation has been investigated by XRD and SEM/EDS. Result shows that MgO can convert vanadium slag at a high temperature of 1723K. With the increase of blowing time of oxygen, the trivalent vanadium in the spinel phase gradually disperses in the silicate matrix and then concentrates in (Mg, Mn, Ca)2V2O7. With the increase of MgO content, the peak intensity of Mg2V2O7 diffraction peak increases significantly. When the MgO content in vanadium slag increases from 4.01 wt% to 14.01 wt%, the extraction efficiency increases from 18.99% to 64.07%.
||Magnesium, Extraction and Processing, Other