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• W2019579875 abstract "espanolLos residuos generados por las actividades mineras en Bolivia representan graves problemas de contaminacion ambiental. En las proximidades de las minas de estano de Llallagua, en el Departamento de Potosi, existen escombreras y colas de grandes dimensiones. Para el presente trabajo se ha estudiado la utilizacion de estos residuos como materias primas para la fabricacion de vidrio. Con ello se pretende contribuir a la remediacion ambiental, ofreciendo con la vitrificacion una alternativa para la estabilizacion de residuos potencialmente peligrosos. Ademas, la comercializacion del producto obtenido podria proporcionar un beneficio economico adicional de la actividad minera. En este estudio se han utilizado tres muestras de residuos con granulometria entre arena y limo. Su composicion quimica, determinada por fluorescencia de rayos X, es granitica, con un elevado contenido en metales pesados. Sobre la base de su composicion se han formulado vidrios de silice mediante la adicion CaCO3 y Na2CO3. El ciclo termico se ha determinado a partir del analisis termico diferencial (ATD). Los valores de la temperatura de transicion de los vidrios, Tg, del vidrio obtenido oscilan entre 626o y 709 oC. Por ultimo, se han realizado las pruebas de lixiviacion, las cuales corroboran la idoneidad de los vidrios obtenidos para retener los metales pesados. EnglishTailings from mining activities in Bolivia represent an environmental problem. In the vicinity of the tin mines of Llallagua, Potosi department, there are large dumps and tailings. We present a study of the use of these wastes as raw materials for the manufacture of glass. This procedure aims to contribute to environmental remediation of mining areas through the vitrification, a process which offers an alternative for stabilization of hazardous waste. In addition, the marketing of the obtained product would provide an additional income to the mining areas. For this study three samples of mining waste, with grain size between sand and silt, were used. The chemical composition of these raw materials, determined by X-ray fluorescence, is granitic, with high contents of heavy metals. On the basis of its composition, glass were made from silica glass by adding CaCO3 and Na2CO3. The thermal cycle has been determined from TDA. Tg values of glass range from 626o to 709 °C. Leaching tests of the obtained glasses confirm their capacity to retain heavy metals." @default.
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• W2019579875 date "2013-06-30" @default.
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• W2019579875 title "Obtención de vidrio a partir de residuos de la minería del estaño en Bolivia" @default.
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• W2019579875 doi "https://doi.org/10.3989/cyv.192013" @default.
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