Co-recovery of iron, chromium, and vanadium from vanadium tailings by semi-molten reduction-magnetic separation process

被引：13

作者：

Xiang, Junyi ^{[1
]}

Huang, Qingyun ^{[2
]}

Lv, Wei ^{[1
]}

Pei, Guishang ^{[1
]}

Lv, XueWei ^{[1
]}

Liu, Songli ^{[3
]}

机构：

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

[2] Chongqing Univ Sci & Technol, Coll Met & Mat Engn, Chongqing, Peoples R China

[3] Yangtze Normal Univ, Coll Mech & Elect Engn, Chongqing, Peoples R China

来源：

CANADIAN METALLURGICAL QUARTERLY | 2018年 / 57卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Vanadium tailings; solid waste; reduction; semi-molten; separation; LD CONVERTER SLAG; STATE;

D O I：

10.1080/00084433.2018.1460300

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A co-recovery process used to extract iron, chromium, and vanadium in the form of chromium-vanadium-bearing metallic iron from vanadium tailings via a semi-molten reduction-magnetic separation method was investigated. The effects of the reductant (carbon) dosage, temperature, and time on the recovery rates of iron, chromium, and vanadium were studied. The phase compositions, microstructures, and micro-constitutions of the reduced samples, products, and byproducts were analysed using X-ray powder diffraction, SEM and EDS. As the reduction temperature increased, the recovery of iron, chromium, and vanadium improved. When the carbon dosage was increased from 8 to 11%, the recovery enhanced; however, the recovery deteriorated with carbon dosage of over 11%. Under optimum conditions, two products were obtained, namely a primary product consisting of chromium-vanadium-bearing metallic iron, where the recovery rates of iron, chromium, and vanadium were over 98, 82, and 65%, respectively, and a byproduct consisting of titanium-bearing slag, where the titanium yield was approximately 68%. The co-recovery process exerts a significant influence on the recovery of valuable metals and the minimisation of hazardous materials for clean utilisation of vanadium tailings.

引用

页码：262 / 273

页数：12