Flotation kinetic constants of two Colombian coals' vitrinite maceral-Reference-Cited by-同舟云学术

Flotation kinetic constants of two Colombian coals' vitrinite maceral

Published:2009-09-01 Issue:3 Volume:29 Page:29-35
ISSN:2248-8723
Container-title:Ingeniería e Investigación
language:
Short-container-title:Ing. Inv.

Author:

Piñeres Mendoza Jorge Luís,Barraza Burgos Juan Manuel,Blandón Montes Astrid del Socorro

Abstract

Vitrinite maceral flotation kinetic constants are important in designing flotation columns to be used in separating this maceral group. This work shows the effect of pH, air speed and froth concentration on vitrinite maceral flotation kinetic constants by using two Colombian bituminous coals: El Cerrejón (Guajira) and La Jagua (Cesar). A 5 m high pilotscale flotation column was used in all runs. The samples were processed using 4-10 pH, 0.7-2.1 cm/s air speed and 2-6 ml/kg of coal froth concentration ranges. Both La Jagua and El Cerrejón coals showed high kinetic constants figures in acid conditions (0.692 min-1 at pH 4 and 0.559 min-1 at pH 5, respectively). The results showed that, generally, the best operating conditions for obtaining high vitrinite maceral kinetic constant values were having an acid medium and low air flow and froth concentration.

Publisher

Universidad Nacional de Colombia

Subject

General Engineering,Building and Construction

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