钢渣内部金属氧化物调控提高干法脱硫性能研究

doi:10.11896/cldb.21090022

材料导报

2023, Vol. 37

Issue (8): 21090022-4 https://doi.org/10.11896/cldb.21090022

金属与金属基复合材料

钢渣内部金属氧化物调控提高干法脱硫性能研究

王歆銘, 马晓宇^*, 崔素萍, 王剑锋, 王亚丽, 马骥堃

北京工业大学材料科学与工程学院,北京 100124

Study on Improving Dry Desulphurization Performance by Regulating Metal Oxides in Steel Slag

WANG Xinming, MA Xiaoyu^*, CUI Suping, WANG Jianfeng, WANG Yali, MA Jikun

Colloge of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

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摘要钢渣含有大量碱金属氧化物,使其具有作为烟气脱硫剂的潜力,将钢渣改性处理用于烟气干法脱硫对生态环境保护和资源节约有深远意义。本工作从调控金属氧化物组成的角度对钢渣进行改性,提高其脱硫性能。首先证实了钢渣的化学组成中主要金属氧化物Fe₂O₃、Al₂O₃、MgO、MnO对CaO及钢渣干法脱硫的促进作用,而后通过酸、碱处理调控钢渣主要金属氧化物的组成,提升脱硫性能,并通过XRF、XRD、XPS、SO₂-TPD等测试方法研究了脱硫性能提升的原因。结果表明:改性后,部分以固熔体相等结构存在的金属离子分离转化为金属氧化物,钢渣表面晶格氧、吸附氧含量增加,且晶格氧占比增大,对SO₂的物理吸附、化学吸附能力增强。pH为13时,脱硫效果最佳,可达93%。

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关键词: 钢渣改性烟气干法脱硫金属氧化物晶格氧吸附氧

Abstract: The steel slag contains a lot of alkali metal oxides, which makes it have the potential as flue gas desulfurization agent. The modification of steel slag for dry flue gas desulfurization is of profound significance for ecological environment protection and resource conservation. In this work, the steel slag was modified by adjusting the composition of metal oxide to improve its desulfurization performance. Firstly, the promotion effect of the main metal oxides Fe₂O₃, Al₂O₃, MgO and MnO in the chemical composition of steel slag on CaO and dry desulfurization of steel slag was confirmed, and then the composition of the main metal oxides of steel slag was regulated by acid and alkali treatment to improve the desulfurization performance. XRF, XRD, XPS, SO₂-TPD and other test methods were used to study the reasons for the improvement of desulfurization performance. The results show that after modification, some metal ions existing in the same structure of solid solution are separated into metal oxides. The content of lattice oxygen and adsorbed oxygen on the surface of steel slag increases, the proportion of lattice oxygen increases, and the physical and chemical adsorption capacity of SO₂ is enhanced. When the pH value is 13, the best effect is achieved, and the desulfurization rate can reach 93%.

Key words: steel slag modification dry flue gas desulfurization metal oxid lattice oxygen oxygen adsorption

出版日期: 2023-04-25 发布日期: 2023-04-24

ZTFLH:

X753

基金资助: 国家重点研发计划(2017YFB0310802);北京市教育委员会科技计划资助项目(KM201910005011)

通讯作者: *马晓宇,北京工业大学材料科学与工程学院副教授、硕士研究生导师。2005年于南京理工大学特种能源工程与烟火技术专业本科毕业,2009年于沈阳化工学院应用化学专业硕士毕业,2012年于吉林大学取得物理化学专业理学博士学位后到北京工业大学工作至今。目前主要从事SCR脱硝催化材料、生物质基纳米复合材料等方面的研究工作。发表论文20余篇,包括Powder Technology、Polymer International、Journal of Molecular Catalysis A: Chemical、Materials等。maxiaoyu@bjut.edu.cn

作者简介: 王歆銘,2019年6月于齐鲁工业大学取得学士学位。北京工业大学材料科学与工程学院硕士研究生,在马晓宇副教授的指导下进行研究。目前主要研究领域为生态环境材料烟气脱硫。

引用本文:

王歆銘, 马晓宇, 崔素萍, 王剑锋, 王亚丽, 马骥堃. 钢渣内部金属氧化物调控提高干法脱硫性能研究[J]. 材料导报, 2023, 37(8): 21090022-4.
WANG Xinming, MA Xiaoyu, CUI Suping, WANG Jianfeng, WANG Yali, MA Jikun. Study on Improving Dry Desulphurization Performance by Regulating Metal Oxides in Steel Slag. Materials Reports, 2023, 37(8): 21090022-4.

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http://www.mater-rep.com/CN/10.11896/cldb.21090022 或 http://www.mater-rep.com/CN/Y2023/V37/I8/21090022

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