Oxidation Mechanism of Vanadium Slag with High MgO Content at High Temperature

被引：11

作者：

Diao, Jiang ^{[1
,2
]}

Liu, Liang ^{[1
,2
]}

Lei, Jing ^{[1
,2
]}

Tan, Wen-Feng ^{[1
,2
]}

Li, Hong-Yi ^{[1
,2
]}

Xie, Bing ^{[1
,2
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China

[2] Chongqing Univ, Chongqing Key Lab Vanadium Titanium Met & Adv Mat, Chongqing 400044, Peoples R China

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2021年 / 52卷 / 01期

基金：

中国国家自然科学基金;

关键词：

EXTRACTION; RECOVERY;

D O I：

10.1007/s11663-020-02000-w

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Based on two considerations of making full use of the residual heat of vanadium slag and exploring a novel green vanadium extraction process, this article employs vanadium slag with high MgO content as raw material, blowing oxygen into the molten vanadium slag and using the residual heat of the vanadium slag to carry out high-temperature roasting experiments. XRD and SEM/EDS were used to characterize the phase evolution and morphology of vanadium slag with high MgO content during oxidation. The results show that at a high temperature of 1723 K, the trivalent vanadium in vanadium slag can be partly transformed into acid-soluble pentavalent vanadium. Titanium-bearing spinel was oxidized into a large amount of strip pseudobrookite Fe2TiO5. After oxidation, vanadium existed in the form of the solid solution of magnesium pyrovanadate (Mg, Mn, Ca)(2)V2O7. The leaching rate of roasted vanadium slag with high MgO content is significantly higher than that of industrial vanadium slag. With the increase of oxygen blowing time from 10 to 30 minutes, the leaching rate of roasted vanadium slag with high MgO content increases from 23.19 to 53.69 pct.

引用

页码：494 / 501

页数：8

共 24 条

[1] Leaching of vanadium from LD converter slag using sulfuric acid [J].