Paterson and Cooke UK Ltd

United Kingdom

Paterson and Cooke UK Ltd

United Kingdom
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Granlund D.,Paterson and Cooke UK Ltd | Wilson S.,Paterson and Cooke UK Ltd | Eriksson C.,Boliden | Nordlund M.,Boliden
12th International Conference on Mining with Backfill 2017, Minefill 2017 | Year: 2017

The Garpenberg Mine in Sweden is owned and operated by Boliden, producing lead and zinc concentrate. The mine has been operated by Boliden since 1953, and has recently (2014) undertaken a major operational and production upgrade with the construction of a new processing plant operating at 2.5 Mtpa of ore production. The revitalisation being driven primarily by the discovery of increased mineral reserves and resources offering a production life past 2030. A backfill system has been operating at the mine since 2007, producing a paste backfill from de-slimed mill tailings. Between 2015 and 2016 Boliden, with support from Paterson & Cooke's Backfill Group undertook a program of work to improve the operational performance of the system, focusing on increasing system availability and throughput, as well as enabling reticulation into the new Kvanberget ore body. This paper is presented as a case study to describe an approach to overcome commonly encountered paste reticulation system problems, notably expansion to new mining areas, system availability and excessive system wear. Specifically, the case study describes how, through the introduction of diversion valving, level loops and hydraulic modelling, the system availability has been increased. The hydraulic modelling including completion of a rheological loop testing to better quantify the paste characteristics so that, through hydraulic modelling the consistency of the backfill could be adapted to ensure full flow operating conditions, accounting for inclusion of the new level loops. Copyright © 2017 by the Society for Mining, Metallurgy & Exploration Inc. All rights reserved.

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