Hydrometallurgical Extraction of Zinc and Iron from Electric Arc Furnace Dust (EAFD) using Hydrochloric Acid

Teo, Yao Yi; Lee, Hwang Sheng; Low, Yong Chen; Choong, Seng Wei; Low, Kin Onn

doi:10.21315/jps2018.29.s3.6

Cited by 23 publications

(10 citation statements)

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“…The conventional methods suggested in literature for the extraction of zinc from EAFD can be categorised into hydrometallurgical [2,[8][9][10][11] and pyrometallurgical [12][13][14]. The former approach, whilst typically lower in energy consumption and more environmentally benign, suffers from incomplete extraction [15][16][17], harshness of the leaching medium [16], and poor selectivity [16,18]. Pyrometallurgical treatments, have found industrial scale applications such as the Waelz kiln.…”

Section: Introductionmentioning

confidence: 99%

Thermal degradation kinetics of polyvinyl chloride in presence of zinc oxide

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Thermal degradation kinetics of polyvinyl chloride in presence of zinc oxide

et al. 2022

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“…Os ensaios em escala de bancada foram realizados em disco pelotizador de 40 cm resíduo particulado gerado em fornos elétricos. De acordo com Teo et al [3], o PAE corresponde a 1,5% de toda carga enfornada em fornos de aciaria elétrica. A NBR 10.004 [4] classifica este resíduo como perigoso.…”

Section: Aglomeração a Friounclassified

Pelotização Do Pó De Aciaria Elétrica Para Obtenção De Concentrado De Zinco Em Forno Waelz

Fagundes¹,

Gama²,

Martins³

et al. 2019

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a Resumo O presente trabalho teve por objetivo o estudo da pelotização do pó de aciaria elétrica (PAE), resíduo obtido na produção de aço através do forno elétrico a arco, como carga para forno Waelz, para obtenção de concentrado de zinco. Para caracterização do PAE foram realizadas análises granulométricas, análise química e análise mineralógica. Os resultados das análises granulométricas mostram grande heterogeneidade granulométrica, devido ao alto grau higroscópico do material que, na presença de umidade, tende a aglomerar. As análises química e mineralógica mostraram predominância de minerais de ferro e zinco. O PAE foi submetido a aglomeração a frio em disco pelotizador. Para determinação da resistência mecânica das pelotas, foram realizados ensaios de compressão uniaxial e drop number. Os resultados de resistência foram promissores e acima dos padrões inicialmente estabelecidos. Testes em forno piloto Waelz foram realizados para medir o impacto do uso das pelotas no processo. Os resultados dos testes em forno piloto também foram animadores, apontando para uma diminuição de acreção sem impactar no rendimento médio do zinco. Palavras-chave: Pó de aciaria elétrica (PAE); Pelotização; Forno Waelz. AbstractThe objective of the present work was to study the pelletizing of electric arc furnace dust, the residue obtained in the production of steel through the electric arc furnace, as a load for Waelz furnace, to obtain zinc concentrate. To characterize the dust, granulometric analysis, chemical analysis and mineralogical analysis were performed. The results of the granulometric analysis show a great granulometric heterogeneity due to the high hygroscopic degree of the material that, in the presence of moisture, tends to agglomerate. The chemical and mineralogical analyzes showed predominance of iron and zinc minerals. The PAE was subjected to cold agglomeration in disc pelletizing. To determine the mechanical strength of the pellets, uniaxial compression and drop number tests were performed. The resistance results were promising and above the standards initially established. Waelz pilot kiln tests were performed to measure the impact of pellet use in the process. The results of the pilot kiln tests were also encouraging, pointing to a decrease in accretion without impacting the average yield of zinc.

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“…During steel manufacturing, hazardous electric arc furnace dust (EAFD) is generated as a waste by-product. About 7.5 million tons of EAFD is globally produced annually from steel manufacturing (Teo et al, 2018). The chemistry of the generated EAFD strongly depends on the quality of the scrap being employed in the smelting and the composition of other input materials (KiranKumar and Roy, 2022).…”

Section: Introductionmentioning

confidence: 99%