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Performance of 500 m

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TankCell® at Kevitsa Cu-Ni-PGM

concentrator

Toni Mattsson1,a, Tomi Maksimainen2, Rodrigo Grau1, and Antti Rinne1 1

Outotec Beneficiation, Espoo, Finland 2

Kevitsa mine, Finland

Abstract. Outotec TankCell e500 flotation cell, with 500 m3

of efficient flotation volume, has been in operation since October 2014 at Kevitsa Cu-Ni-PGM concentrator as the first Cu rougher flotation cell. The 500 m3 flotation cell has proven to provide metallurgical superiority

at very low specific power. On average the cell has recovered 71% of copper contained in the flotation feed. The cell has produced the concentrate with the Cu grade equal to 17% Cu. The typical specific power for the cell is around 0.4 kW/m3 (blower power not included). After the start-up of the cell the operating parameters have varied. The mixing speed have varied from 4.9 to 7.0 m/s and the superficial gas velocity from 0.3 to 1.5 cm/s. At various operating parameters the mixing, gas dispersion and metallurgical performance of the cell have been evaluated. In this paper a review of the hydrodynamic and metallurgical performance of the cell is presented. The paper focuses on the interactions of mixing intensity, bubble size and metallurgical performance in industrial application.

a

Corresponding author: toni.mattsson@outotec.com

,

01025 (2016) DOI: 10.1051/

E S Web of Conferences3 8 e sconf /20163 0 01028

MEC2016

5

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