Biochar as a slag foaming agent in EAF – A novel experimental setup

E. Hoikkaniemi, P. Sulasalmi, V-V Visuri, T. Fabritius
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引用次数: 1

Abstract

Slag foaming practice is employed widely in electric arc furnace steelmaking to improve the energy efficiency, protect the furnace structures and reduce noise pollution. Slag foaming is typically launched by injecting fossil-based carbonaceous material (e.g. coke dust) into the melt. In this study, a novel laboratory-scale experimental setup was used for studying the substitution of fossil carbon by biochar as slag foaming agent. The setup was equipped with an injection device for feeding carbon and a camera system for observing the foaming phenomenon and recording the process. A set of experiments was conducted for studying the foaming in slag-carbon systems using two carbonaceous materials: 1) coke dust was used as a reference material and 2) a high-quality biochar was used as a possible replacement. In the experiments, sufficient foaming was achieved with both of the carbonaceous materials. The biochar produced almost equal foaming behavior as coke dust. The results indicate that biochar could be used to substitute carbon for slag foaming in the EAF.
生物炭作为电炉炉渣发泡剂--一种新型实验装置
电弧炉炼钢广泛采用炉渣发泡法,以提高能效、保护炉体结构和减少噪音污染。炉渣发泡通常是通过向钢水中注入化石碳质材料(如焦炭粉)来实现的。在本研究中,使用了一种新颖的实验室规模实验装置来研究用生物炭替代化石碳作为炉渣发泡剂。该装置配备了一个用于注入碳的注入装置和一个用于观察发泡现象和记录发泡过程的摄像系统。为研究矿渣-碳系统中的发泡现象,使用两种碳质材料进行了一组实验:1)焦炭粉作为参考材料;2)优质生物炭作为可能的替代材料。在实验中,两种碳质材料都能产生足够的泡沫。生物炭产生的发泡效果几乎与焦炭粉相同。结果表明,生物炭可用于替代碳,在电炉炉渣中发泡。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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