Artículo
Recovery of Zn from acid mine water and electric arc furnace dust in an integrated process
Autor/es | Carranza Mora, Francisco
Romero Aleta, Rafael Mazuelos Rojas, Alfonso Iglesias González, María Nieves |
Departamento | Universidad de Sevilla. Departamento de Ingeniería Química |
Fecha de publicación | 2016-01-01 |
Fecha de depósito | 2024-04-01 |
Publicado en |
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Resumen | In this paper, the purification of acid mine water and the treatment of electric arc furnace dust (EAFD) are integrated into one process with the aim of recovering the Zn content of both effluent and waste. Zinc recovery ... In this paper, the purification of acid mine water and the treatment of electric arc furnace dust (EAFD) are integrated into one process with the aim of recovering the Zn content of both effluent and waste. Zinc recovery can reduce the cost of their environmental management: purified acid mine water is discharged after removing all metals; EAFD ceases to be hazardous waste; and Zn is valorised. The process consists of the recovery of Zn as zinc oxide and its purification into commercial products. First, EAFD is leached with acid water and the dissolved metals are selectively precipitated as hydroxides. After EADF leaching, ferrous iron is bio-oxidized and Fe and Al are then precipitated; in the following stage, Cu, Ni, Co and Cd are cemented and finally Zn is precipitated as ZnO. In order to purify water that finally is discharged to a river, lime is used as the neutralizing agent, which results in a precipitate of mainly gypsum, MnO, and ZnO. From the impure zinc oxide produced, various alternatives for the attainment of commercial products, such as basic zinc carbonate and electrolytic zinc, are studied in this work. |
Agencias financiadoras | Ministerio de Ciencia e Innovación (MICIN). España |
Identificador del proyecto | CTM2012-37240 |
Cita | Carranza Mora, F., Romero Aleta, R., Mazuelos Rojas, A. y Iglesias González, M.N. (2016). Recovery of Zn from acid mine water and electric arc furnace dust in an integrated process. Journal of Environmental Management, 165, 175-183. https://doi.org/10.1016/j.jenvman.2015.09.025. |
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Recovery of Zn_C.pdf | 977.9Kb | [PDF] | Ver/ | Versión aceptada |