Performance evaluation of EAF dust-loaded rice straw biochar as the EAF foaming agent: Study on physicochemical properties and reduction behavior with slag

IF 6.7 1区工程技术 Q2 ENERGY & FUELS

Fuel Pub Date : 2025-05-22 DOI:10.1016/j.fuel.2025.135710

Chengjin Han , Guangsheng Wei , Qisheng Wang , Rong Zhu

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引用次数: 0

Abstract

In the current electric arc furnace (EAF) steelmaking process, the low utilization rate of injected biochar hinders its industrial-scale application. This study proposes a method to prepare high density and reactivity modified rice straw biochar (D-CSC) by co-pyrolyzing rice straw with EAF dust as solid waste. Additionally, the study compares and analyzes the physicochemical properties and reduction behavior with slag between rice straw biochar (CSC) and D-CSC. The results indicate that the EAF dust acts as a catalyst during pyrolysis, promoting the formation of alcohols and alkanes and increasing the biochar yield. Compared to the CSC, the D-CSC exhibits higher density, roughness, and reactivity, with less graphitization. Furthermore, throughout the reduction process with slag, the reduction rate of the D-CSC is consistently higher than that of the CSC. The research results will provide a new technological pathway for green, low-carbon, high-efficiency and low-cost production in EAF steelmaking.

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电炉除尘稻秆生物炭作为电炉发泡剂的性能评价：理化性能及炉渣还原性能研究

在目前的电弧炉炼钢工艺中，注入生物炭的利用率较低，阻碍了其工业规模的应用。本研究提出了将秸秆与电炉粉尘作为固体废弃物共热解制备高密度反应性改性秸秆生物炭（D-CSC）的方法。此外，本研究还比较分析了秸秆生物炭（CSC）和D-CSC的理化性质及其与炉渣的还原行为。结果表明：在热解过程中，电炉粉尘起到催化剂的作用，促进了醇类和烷烃的生成，提高了生物炭的产率。与CSC相比，D-CSC具有更高的密度、粗糙度和反应性，石墨化程度更低。此外，在整个渣还原过程中，D-CSC的还原速率始终高于CSC。研究成果将为电炉炼钢的绿色、低碳、高效、低成本生产提供新的技术途径。

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来源期刊

Fuel 工程技术-工程：化工

CiteScore

12.80

自引率

20.30%

发文量

3506

审稿时长

64 days

期刊介绍： The exploration of energy sources remains a critical matter of study. For the past nine decades, fuel has consistently held the forefront in primary research efforts within the field of energy science. This area of investigation encompasses a wide range of subjects, with a particular emphasis on emerging concerns like environmental factors and pollution.