质能耦合高温AOD渣处置不锈钢酸洗污泥工艺

冯晓明; 赵峥; 郁健; 张延玲

doi:10.13205/j.hjgc.202507002

质能耦合高温AOD渣处置不锈钢酸洗污泥工艺

doi: 10.13205/j.hjgc.202507002

冯晓明¹,
赵峥²,
郁健³,
张延玲^2, ,

1. 建龙钢铁控股有限公司, 北京 100070;
2. 北京科技大学绿色低碳钢铁冶金全国重点实验室, 北京 100083;
3. 北京北科环境工程有限公司, 北京 100083

基金项目:

国家重点研发计划项目（2019YFC1905701）

详细信息

作者简介:
冯晓明（1985—），男，工程师。937251421@qq.com

通讯作者:
张延玲（1972—），女，博士，教授。ustbzly1108@163.com

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- 文章访问数: 8
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- PDF下载量: 0
- 被引次数: 0
出版历程
- 收稿日期: 2024-05-02
- 录用日期: 2024-08-05
- 修回日期: 2024-07-31
- 网络出版日期: 2025-09-11

A mass-energy coupling treatment process for stainless steel pickling sludge using high-temperature argon-oxygen decarburization （AOD） slag

1. Jianlong Steel Holdings Co., Ltd., Beijing 100070, China;
2. State Key Laboratory for Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;
3. Beijing Beike Environmental Engineering Co., Ltd., Beijing 100083, China

摘要

摘要: 提出质能耦合处理不锈钢酸洗污泥工艺路线，以实现AOD渣能源资源双利用和酸洗污泥解毒。基于实验室实验、计算热力学与SEM-EDS分析，探究AOD渣-污泥混合体系中硫、铬、铁元素的分配与转化机制。结果显示，含碳酸洗污泥球团预处理时无含硫气体逸出，高温AOD渣浴还原时硫在气相中的分配比为0.55%、渣中固定率达99.68%，铬铁金属回收率约为90%。球团在高温AOD渣中的内在转化机制：内部还原由CaSO₄向CaS转变、FeCr₂O₄生成、Fe—Cr—C金属聚集长大，球团在熔渣中的溶解行为包括铁氧化物向Mg（Fe，Cr）₂O₄、Mg（Al，Cr）₂O₄转变，最终形成MgCr₂O₄的过程以及CaS在渣中的稳定化过程。该研究为二者协同处置的工业应用提供了依据。
- AOD熔渣 /
- 不锈钢酸洗污泥 /
- 质能耦合 /
- 物相转变 /
- 溶解路径
Abstract: A technical route for the coupled treatment of stainless steel pickling sludge based on mass-energy coupling is proposed in this paper. This process features a groundbreaking technical route， which can synergistically recover energy and resources from argon-oxygen decarburization （AOD） slag and carry out eco-friendly detoxification of hazardous pickling sludge. Through systematic laboratory experiments， combined with computational thermodynamics modeling and SEM - EDS analysis， the migration modes and phase transformation mechanisms of key elements（such as S， Cr， and Fe） in the molten AOD slag-sludge mixed system were studied. The results showed that during the pretreatment stage of carbon-containing pickling sludge particles， the risk of sulfur pollution was effectively suppressed， and no sulfur-containing gas emission was detected. Subsequently， in the thermal reduction stage in the AOD slag bath （operating temperature：1550℃）， the distribution ratio of sulfur in the gas phase was 0.55%， and the sulfur fixation rate in the slag phase reached 99.68% through the formation of stable sulfides. The recovery rate of high-value metal components mainly composed of Fe-Cr alloy was approximately 90%. The basic mechanism analysis revealed a multi-stage reaction pathway： the redox transformation within the particles involved sulfate reduction （CaSO₄→CaS）， spinel crystallization （formation of FeCr₂O₄）， and coarsening of metal particles （Fe—Cr—C）. The interfacial interactions during the slag dissolution process promoted the complex reconstruction of MgCr₂O₄ spinel while enabling the thermodynamically stable encapsulation of CaS in the slag matrix. This study lays a theoretical and technical foundation for the industrial-scale implementation of the energy-coupled co-processing system and presents a paradigm shift for the stainless steel manufacturing industry towards a circular economy.
- AOD slag /
- stainless steel pickling sludge /
- mass-energy coupling /
- phase transformation /
- dissolution pathway

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