含钒钢渣空白焙烧—硫酸浸出提钒试验研究

金属矿山 ›› 2025, Vol. 54 ›› Issue (6): 100-106.

含钒钢渣空白焙烧—硫酸浸出提钒试验研究

刘景景^1,2

1. 攀枝花学院钒钛学院四川攀枝花 617000;2. 钒钛资源综合利用四川省重点实验室,四川攀枝花 617000

出版日期:2025-06-15 发布日期:2025-07-09
作者简介:刘景景(1986—),女,副教授,博士。
基金资助:
绿色催化四川省高校重点实验室项目(编号:LYJ2203);攀枝花市市级指导性科技计划项目(编号:2023ZD-G-3);大学生创新创业训练计划项目(编号:202311360008,S202411360017)。

Experimental Study on Vanadium Extraction from Steel Slag Containing Vanadium by Blank Roasting and Sulfuric Acid Leaching

LIU Jingjing ^1,2

1. College of Vanadium and Titanium,Panzhihua University,Panzhihua 617000,China; 2. Sichuan Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization,Panzhihua 617000,China

Online:2025-06-15 Published:2025-07-09

摘要/Abstract

摘要： 针对现有含钒钢渣提钒工艺成本高、污染大、效率低的问题,以四川攀枝花某 V2O5 含量为 0. 94%的含钒钢渣为对象开展了提钒试验研究。研究表明: ① 含钒钢渣的主要物相为 SiO2 、 Ca2 SiO4 、 MgFe2O4 、 Ca2Fe1. 2Mg0. 4 Si 0. 4O5 、FeO、Ca3. 18Fe15. 48Al 1. 34O28 和 Ca2Fe2O5 等;空白焙烧处理后新生成了 Fe3O4 和 Ca12Al 14O33 相, Ca2 SiO4 和 Ca2Fe1. 2Mg0. 4 Si 0. 4O5 的衍射峰强度增强,证实高温焙烧使部分元素由低价态氧化为高价态;900 ℃ 焙烧样的硫酸浸渣以 CaSO4·2H2O 相为主,残余少量 SiO2 、MgFe2O4 和 Fe3O4 ,表明硫酸有效溶解了部分矿物,为钒的溶出创造了条件。 ② 在空白焙烧温度 900 ℃ 、硫酸浓度 14%、浸出液固比 8 ∶1 mL/ g、浸出温度 40 ℃ 、浸出时间 25 min 情况下,钒浸出率达 90. 18%。 ③ 该工艺与传统工艺相比的显著优势在于焙烧无须添加剂、浸出温度低且时间短,减排废气 60%、降低能耗 40%、减少酸耗 35%,为含钒钢渣的资源化利用提供了清洁高效的解决方案。

关键词: 含钒钢渣, 　空白焙烧, 　硫酸浸出, 　钒浸出率

Abstract: In view of the problems of high cost,high pollution and low efficiency of the existing vanadium extraction process from vanadium-containing steel slag,this study carried out an experimental study on vanadium extraction from the vanadium-containing steel slag with V2O5 content of 0. 94 % in Panzhihua,Sichuan. The research showed that the main phases of vanadium-bearing steel slag were SiO2 ,Ca2 SiO4 ,MgFe2O4 ,Ca2Fe1. 2Mg0. 4 Si 0. 4O5 ,FeO,Ca3. 18Fe15. 48Al 1. 34O28 and Ca2Fe2O5 . The new phases of Fe3O4 and Ca12Al 14O33 were formed after the blank roasting treatment,and the diffraction peak intensity of Ca2 SiO4 and Ca2Fe1. 2Mg0. 4 Si 0. 4O5 was enhanced,which confirmed that the high temperature roasting made some elements oxidized from low valence to high valence. The main phase of the the sulfuric acid leaching residue from the steel slag calcined at 900 ℃ was CaSO·4 2H2O,with a small amount of SiO2 ,MgFe2O4 and Fe3O4 ,indicating that sulfuric acid effectively dissolves some minerals and creates conditions for the dissolution of vanadium. Under the conditions of blank roasting temperature of 900 ℃ ,sulfuric acid concentration of 14%,leaching liquid-solid ratio of 8 ∶ 1 mL/ g,leaching temperature of 40 ℃ and leaching time of 25 min,the leaching rate of vanadium could reach 90. 18%. Compared with the traditional process,this process has the advantages of no additive,low leaching temperature and short time,with reduced waste gas emissions by 60%,lower energy consumption by 40%,and decreased acid consumption by 35%,which provides a clean and efficient solution for the resource utilization of vanadium-containing steel slag.

Key words: steel slag containing vanadium,blank roasting,sulfuric acid leaching,vanadium leaching rate

中图分类号:

刘景景. 含钒钢渣空白焙烧—硫酸浸出提钒试验研究[J]. 金属矿山, 2025, 54(6): 100-106.

LIU Jingjing . Experimental Study on Vanadium Extraction from Steel Slag Containing Vanadium by Blank Roasting and Sulfuric Acid Leaching [J]. Metal Mine, 2025, 54(6): 100-106.

扫码分享