钢铁钒钛2025，Vol.46Issue(6)：40-46,7.DOI:10.7513/j.issn.1004-7638.2025.06.004
钒渣高效提取冶金:钠镁复合焙烧提钒工艺
Efficient metallurgical extraction of vanadium slag:Sodium-magnesium composite roasting vanadium extraction process
摘要
Abstract
Alkaline earth metals can easily form water-insoluble calcium/magnesium vanadates during sodium roasting of vanadium slag,leading to a decrease in vanadium recovery rate.However,the mod-erate MgO addition facilitates the formation of a highly soluble sodium-magnesium vanadate(Na6Mg2V4O15).Based on this discovery,we propose an innovative sodium-magnesium composite roast-ing process for the vanadium extraction from vanadium slag.Experimental results reveal that Na6Mg2V4O15 exhibits superior dissolution performance under the alkaline leaching conditions(pH～11)of the typical sodium-roasted vanadium slag.The highest vanadium leaching efficiency of 85.30％is obtained under the conventional sodium roasting conditions(20％Na2CO3 dosage,875 ℃).By using the composite roasting process with 3％MgO addition,the Na2CO3 dosage is reduced to 18％and the leach-ing rate is increase to 90.38％.Phase composition analysis of the roasted samples and leached residues indicates that composite roasting promotes the formation of sodium-magnesium vanadate and its sub-sequent dissolution.This cost-effective strategy of partially substituting sodium salts with magnesium salts provides a novel approach for optimizing conventional sodium roasting processes,leading to the reduction of costs and increase of efficiency in the sodium vanadium extraction process.关键词
钒渣/钠镁复合焙烧/钠化焙烧/提钒Key words
vanadium slag/sodium-magnesium composite roasting/sodium roasting/vanadium extraction分类
矿业与冶金引用本文复制引用
曹帅,向俊一,黄青云,申彪,何文艺,韦林森,吕学伟..钒渣高效提取冶金:钠镁复合焙烧提钒工艺[J].钢铁钒钛,2025,46(6):40-46,7.基金项目
国家自然科学基金(52474323) （52474323）
重庆科技大学研究生创新计划项目(YKJCX2420201). （YKJCX2420201）
