A new strategy for the reuse of typical hazardous solid waste electric arc furnace dust (EAFD): Efficient desulfurization by EAFD slurry

Jia, Lijuan; Hu, Kaiqiang; Jiang, Enzhu; Feng, Jiayu; Song, Xin; Ning, Ping; Qian, Yu; Wang, Hongbin

doi:10.1016/j.seppur.2022.122980

Cited by 8 publications

(1 citation statement)

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“…Generally, during the production of one ton of crude steel, about 10-20 kg of EAF dust is generated [27]. To a large extent, the composition of EAF dust depends on the electric arc furnace operating conditions, the characteristics of the scrap iron charged to the furnace, the operating period, and the specification of the produced steel, and it is also specific to each plant [1,12,17,18,[23][24][25][27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Application of a Simple Pretreatment in the Process of Acid Leaching of Electric Arc Furnace Dust

Trifunović,

Milić,

Avramović

et al. 2024

Metals

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Experimental investigations of the effectiveness of the pretreatment of the acid leaching process of a representative sample of electric arc furnace dust (EAF dust) and characterization of a representative sample were performed. As EAF dust is globally defined as hazardous solid industrial waste, and it contains a high percentage of zinc and other useful components, in this paper, the application of pretreatment will be carried out in order to increase the efficiency of the further process of acid leaching, all with the aim of using EAF dust as a secondary raw material for metal valorization. The pretreatment involved the application of a simple process of leaching the EAF dust sample with distilled water. Under the following defined optimal leaching conditions: time—30 min, ratio of solid to liquid phase—1:10, temperature—ambient, and stirring speed—500 rpm, a reduction in the content of water-soluble components was achieved, namely, 83% Cl, 92% K, 74% Na, 14% Cd, 15% Ca, and 19% F. The application of the pretreatment enables significantly better filtration of the suspension and increases the leaching efficiency of zinc and other useful components in the further process of leaching EAF dust with a sulfuric acid solution, compared with the process of direct acid leaching of EAF dust.

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