首页|MgO-V2O5二元系固相反应相变及产物溶解行为

MgO-V2O5二元系固相反应相变及产物溶解行为

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
研究不同摩尔比MgO-V2O5混合物的固相反应行为.采用等温溶解平衡法测定25～55 ℃下反应产物(钒酸镁)在水中的溶解度,并研究其在稀硫酸中的溶解行为和动力学.结果表明,MgO与V2O5的摩尔比和焙烧温度对固相反应产物的相变有较大影响;MgV2O6在水中溶解度最大,其次是Mg2V2O7和Mg3V2O8;随着pH值从4.0降低到2.5,温度从30 ℃增加到70 ℃,钒酸镁在稀硫酸中的溶解率显著增加,其在稀硫酸中的溶解符合二级伪均相反应模型.
Phase transformation in solid-state reaction of MgO-V2O5 binary system and dissolution behavior of products
The solid-state reaction behavior of MgO-V2O5 mixtures with different molar ratios was explored.The solubility of the solid-state reaction products(magnesium vanadates)in water at 25-55 ℃ was measured using the isothermal solution saturation method.The dissolution behavior and kinetics of the magnesium vanadates in dilute sulfuric acid were also investigated.The results showed that the molar ratio of MgO to V2O5 and roasting temperature significantly influenced the phase transformation of the solid-state reaction product.MgV2O6 exhibits the highest solubility in water,followed by Mg2V2O7 and Mg3V2O8.The dissolution rate of magnesium vanadates in dilute sulfuric was significantly increased with the decrease of pH from 4.0 to 2.5 and the temperature increase from 30 to 70 ℃.The dissolution of magnesium vanadate can be described using a second-order pseudo-homogeneous reaction model.

vanadium recoveryMgOV2O5roastingleachingsolubilitykinetic

向俊一、罗明帅、白路伟、陆曦、朱忠棚、黄青云、朱奎松、裴贵尚、吕学伟

展开 >

重庆科技大学冶金与材料工程学院,重庆 401331

攀枝花学院钒钛学院,攀枝花 617000

重庆大学材料科学与工程学院,重庆 400044

提钒 MgO V2O5 焙烧 浸出 溶解度 动力学

National Natural Science Foundation of ChinaNatural Science Foundation of Chongqing,ChinaFoundation of Chongqing University of Science and Technology,ChinaGraduate Research Innovation Project of Chongqing University of Science and Technology,ChinaScience and Technology Innovation Training Program of Chongqing University of Science and Technology,ChinaCollege Students'Innovation and Entrepreneurship Training Program of Chongqing University of Science and Technology,China

52004044CSTB2022NSCQ-MSX0801ckrc2022030YKJCX222021420220462022007

2024

10.1016/S1003-6326(24)66521-0

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(6)
  • 3