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Effect of Diesel Oil and Mixture of Alcohol-Glycol Ether on Colombian Ultrafine Coal Cleaning Using a Test-Rig Closed-Loop Flotation Column
Efecto del diésel oil y la mezcla de alcohol-glicol-éter en la limpieza de carbón ultrafino colombiano utilizando una columna de flotación de prueba en bucle cerrado
DOI:
https://doi.org/10.15446/ing.investig.v42n1.88273Keywords:
Column flotation, Colombian coals, loop, experimental design (en)Columna de flotación, carbones colombianos, bucle cerrado, diseño experimental (es)
A test-rig closed-loop flotation column was used to observe the effect of diesel oil (collector) and Flomin F-425 (frother) on mass yield and ash content for two Colombian coals: Caypa (northern zone) and Guachinte (southwestern zone). The coal samples of less than 38 µm (-400 M) were processed in a collector concentration range of 0,32 to 1,60 kg/ton of coal, as well as a frother concentration range of 10 to 50 ppm. The response surface methodology was used for the experimental test runs. The results showed that the maximum mass yield obtained by Caypa coal was 98,39% at 1,28 kg of collector/ton of coal and 40 ppm of frother concentration, whereas Guachinte coal obtained a maximum mass yield of 94,71% at 0,96 kg of collector/ton of coal and 30 ppm of frother concentration. In general, for Caypa coal, the mass yield tends to increase (low ash removal) with the collector and frother concentration increase; while the mass yield tends to decrease (high ash removal) for Guachinte coal when the collector concentration increases (low ash removal) at high frother concentrations. It is worth highlighting that the ash content of 0,65% obtained for Caypa coal is the lowest value reported in the literature while employing a test-rig loop flotation column in a single stage, which is considered to be an ultra-clean coal obtained by a physical cleaning process.
Se usó una columna de flotación de prueba en bucle cerrado para observar el efecto del diesel oil (colector) y Flomin F-425 (espumante) sobre el rendimiento másico y el contenido de cenizas de dos carbones colombianos: Caypa (zona norte) y Guachinte (zona suroeste). Las muestras de carbón de menos de 38 µm (-400 M) se procesaron en un rango de concentración de colector de 0,32 a 1,60 kg/tonelada de carbón y un rango de concentración de espumante de 10 a 50 ppm. Se utilizo la metodología de superficie de respuesta para las de pruebas experimentales. De los resultados obtenidos, se observó que el rendimiento másico máximo para el carbón de Caypa fue del 98,39% a 1,28 kg de colector/tonelada de carbón y 40 ppm de concentración de espumante, mientras que el carbón Guachinte presentó un rendimiento másico máximo del 94,71% a 0,96 kg de colector/tonelada de carbón y 30 ppm de concentración de espumante. En general, para el carbón Caypa, el rendimiento másico tiende a aumentar (baja remoción de cenizas) con el incremento en la concentración de colector y espumante; mientras que el rendimiento másico tiende a disminuir (alta remoción de cenizas) con el carbón Guachinte cuando la concentración del colector aumenta (baja remoción de cenizas) a altas concentraciones de espumante. Es de destacar que el contenido de cenizas de 0,65% obtenido para el carbón de Caypa es el valor más bajo reportado en la literatura usando una columna de flotación de prueba en bucle cerrado en una sola etapa, que se considera como un carbón ultra limpio obtenido por un proceso de limpieza física.
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1. Jorge Piñeres, Juan Barraza, Silvia Bellich. (2026). Column flotation as an effective strategy for trace element deportment control in coal cleaning. International Journal of Coal Preparation and Utilization, , p.1. https://doi.org/10.1080/19392699.2026.2623437.
2. Jorge Luis Piñeres-Mendoza, Marley Vanegas-Chamorro, Geraldine Ariza-Carbonó. (2022). Limpieza de dos carbones colombianos usando una columna de flotación test-rig. Revista Ing-Nova, 1(1), p.3. https://doi.org/10.32997/rin-2022-3724.
3. Jorge Luis Piñeres, Anderson Grecco, Milene Calvo. (2024). Simulación dinámica de una columna de flotación. Ingeniería y Competitividad, 25(Suplemento) https://doi.org/10.25100/iyc.v25iSuplemento.13117.
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Copyright (c) 2022 Jorge Luis Piñeres, Juan M. Barraza-Burgos, Silvia P. Bellich-Fernandez
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