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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