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Evaluation of bioleaching column test of sulphide copper ore and copper concentrate using preconditioned surface

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Evaluation of bioleaching column test of sulphide copper ore

and copper concentrate using preconditioned surface

Alvaro Videla Leiva1,a , and Mario Vera Vélizand2

1Mining Engineering Department, Pontificia Universidad Catolica de Chile, Chile 2Environmental Engineering Deparment, Pontificia Universidad Católica de Chile, Chile

Abstract. Bacterial activity can be related to the presence of Fe+3 in the solution, which drives

copper oxidation during the secondary copper low grade sulfide ore leaching process. The present work evaluates improvements in kinetics of leaching when ferroxidans are

preconditioned in an inert surface helping to build a biofilm which improves metabolism of the colony. The present work shows evaluation using laboratory columns to perform bioleaching during a 30 days period under three conditions: a base column with no inert surface, a column with loofa available for bacterial growth and conditioning, and finally a column with the loofa surface ground and distributed in the column among the particles.

a

Corresponding author: avidela@ing.puc.cl

,

010 (2016) DOI: 10.1051/

E S Web of Conferences3 8 e sconf /20163 0 0108

MEC2016

39 39

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