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Eliminación de arsénico de concentrados de cobre

Authors: Bazan Brizuela, Vanesa Lucia; Orozco Santander, Ivana Marcela; Brandaleze, Elena; Ruarte, Pablo;

Eliminación de arsénico de concentrados de cobre

Abstract

El arsénico es un metaloide altamente contaminante y tóxico. Su presencia es muy nociva para el medio ambiente. En la metalurgia del cobre, sus límites permisibles no deben superar el 0,5 %. Mayores contenidos, durante los procesos de fusión de los concentrados de cobre pueden generar emisiones e incluso ocasionar degradación de los refractarios de los hornos. Esto implica pérdidas cuantiosas. Cuando los concentrados de cobre poseen elevados porcentajes de arsénico no pueden comercializarse. Este trabajo pretende brindar una alternativa de procesamiento que permita aprovechar dichos concentrados evitando los posibles daños. Se analiza el comportamiento de tres concentrados frente al proceso de tostación en función de las variables operativas. En este estudio se ha determinado que procesando a 650°C, no existen emanaciones debido a la conversión de especie de Sinnerite a Enargita. Luego de obtener la calcina se realiza una lixiviación alcalina, con el objetivo de eliminar el arsénico remanente en los concentrados. El estudio ha comprobado que los mejores resultados se obtienen realizando una lixiviación con un medio NaHS / NaOH. La eliminación completa de arsénico se produce a una temperatura de 60°C y en un tiempo de operación de 4 horas. Esta información constituye una importante contribución para los procesos de metalurgia extractiva del cobre y el aprovechamiento de recursos no renovables.

Arsenic is a highly polluting and toxic metalloid. Their presence is very harmful to the environment. In the copper metallurgy, the permissible limit must not exceed 0.5%. A higher content during copper concentrates melting processes can cause gases emissions and even refractory lining corrosion. This means important losses. When copper concentrates, present high percentages of arsenic they cannot be marketed. The aim of this paper is to provide an alternative processing to apply for these type of concentrates, avoiding the environment damage. It is possible to apply a leaching in a NaHS / NaOH media successfully. The complete arsenic removal is possible at the temperature 60 °C with an operating time of 4 hours. This information is an important contribution to the processes of copper extractive metallurgy and the mining of non-renewable resources.

Fil: Bazan Brizuela, Vanesa Lucia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Juan. Facultad de Ingeniería. Instituto de Investigaciones Mineras; Argentina

Fil: Brandaleze, Elena. Universidad Tecnológica Nacional. Facultad Regional San Nicolás. Centro para el Desarrollo Tecnológico de Materiales; Argentina

Fil: Orozco Santander, Ivana Marcela. Universidad Nacional de San Juan. Facultad de Ingeniería. Instituto de Investigaciones Mineras; Argentina

Fil: Ruarte, Pablo. Universidad Nacional de San Juan. Facultad de Ingeniería. Instituto de Investigaciones Mineras; Argentina

Country
Argentina
Keywords

Concentrados, https://purl.org/becyt/ford/2.4, Eliminación, https://purl.org/becyt/ford/2, Arsénico

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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