A cleaner vanadium extraction method featuring non-salt roasting and ammonium bicarbonate leaching

被引：126

作者：

Li, Meng ^{[1
,2
,4
]}

Liu, Biao ^{[2
]}

Zheng, Shili ^{[2
]}

Wang, Shaona ^{[2
]}

Du, Hao ^{[2
,3
]}

Dreisinger, D. B. ^{[4
]}

Zhang, Yi ^{[2
]}

机构：

[1] Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China

[2] Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] Univ British Columbia, Dept Mat Engn, Vancouver, BC V6T 1Z4, Canada

来源：

JOURNAL OF CLEANER PRODUCTION | 2017年 / 149卷

基金：

中国国家自然科学基金;

关键词：

Vanadium slag; Non-salt roasting; Leaching thermodynamics; Ammonium bicarbonate leaching; Kinetics; TITANO-MAGNETITE; SULFURIC-ACID; SLAG; KINETICS; OXIDATION; OXIDE; SEPARATION; FEV2O4; NICKEL; SYSTEM;

D O I：

10.1016/j.jclepro.2017.02.093

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A cleaner method featuring non-salt roasting and ammonium bicarbonate leaching has been studied for the extraction of vanadium from vanadium slag. Compared to the traditional alkaline salt roasting followed by water leaching process, chromium spinel in the raw vanadium slag will not be converted to carcinogenic chromate salts and exhaust gas will not be produced in the non-salt roasting process. The soluble salt, NH4VO3, can be easily crystallized directly by cooling. The wastewater from vanadate precipitation can be recycled in the leaching process. The leaching residue can be comprehensively utilized in conjunction with an iron-making process. The oxidation mechanisms of vanadium spinel were analyzed using XRD and SEM-EDS. Additionally, the effects of leaching variables, including ammonium bicarbonate concentration, roasted vanadium slag particle size, and leaching temperature, were examined. Finally, the leaching thermodynamics and leaching kinetics have been studied. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：206 / 217

页数：12

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