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Coal acid mine drainage treatment using cement kiln dust

Martínez, Edgar Alberto and Tobón, Jorge Iván and Morales, Juan Guillermo (2014) Coal acid mine drainage treatment using cement kiln dust. Dyna; Vol. 81, núm. 186 (2014); 87-93 DYNA; Vol. 81, núm. 186 (2014); 87-93 2346-2183 0012-7353 .

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URL oficial: http://revistas.unal.edu.co/index.php/dyna/article...

Resumen

Sulphurs are present in different rocks. During mining activities and the sulphur removal processes Acid Mine Drainage (AMD) may be produced, by sulphate ions (SO4 2-) in solution. AMDs are the main source of pollution from mining operations and in Colombia their discharge into natural bodies of water must comply with national environmental regulations (pH between 5 and 9). Cement Kiln Dust (CKD), with calcium carbonate as its main component, from a Cementos Argos S.A. plant was used to neutralize an AMD generated through a coal bio-desulphurization process. Neutralized AMDs had pH values between 7.72 – 8.05 and the sulphates removal ranged from 67% to 70%. Precipitated sludge was dried and analyzed in order to determine its chemical and mineralogical composition. Moisture content was between 69% and 81%; this precipitated material was composed of gypsum with approximately 50% purity, as well as calcium carbonate. This composition makes it suitable for use in cement production.

Tipo de documento:Artículo - Article
Información adicional:Derechos de autor reservados
Palabras clave:Acid Mine Drainage, Sulphate Removal, Cement Kiln Dust, Synthetic Gypsum
Unidad administrativa:Revistas electrónicas UN > Dyna
Código ID:42388
Enviado por : Dirección Nacional de Bibliotecas STECNICO
Enviado el día :13 Septiembre 2014 09:18
Ultima modificación:29 Enero 2015 15:22
Ultima modificación:29 Enero 2015 15:22
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