Energy efficient grinding technology

Current market trends for HPGRs in the mining sector

HPGR in the Tüprag Kışladağ Gold Mine © Weir Minerals
HPGR in the Tüprag Kışladağ Gold Mine
© Weir Minerals
1 Investments for non-ferrous metals © IEA
1 Investments for non-ferrous metals
© IEA
2 Current investment development © Wood Mackenzie
2 Current investment development
© Wood Mackenzie
3 Energy requirement and copper content [8]
3 Energy requirement and copper content [8]
4 Sales figures for HPGRs up to 2012 © OneStone Consulting
4 Sales figures for HPGRs up to 2012
© OneStone Consulting
5 Country markets and feed materials by sales figures © OneStone Consulting
5 Country markets and feed materials by sales figures
© OneStone Consulting
6 Current figures for HPGRs from FLSmidth © OneStone Consulting
6 Current figures for HPGRs from FLSmidth
© OneStone Consulting
7 Latest generation of the HPGR Pro © FLSmidth
7 Latest generation of the HPGR Pro
© FLSmidth
8 Grinding principle of HPGRs © Weir Minerals
8 Grinding principle of HPGRs
© Weir Minerals
9 Wear-resistant studs in HPGRs © Polysius
9 Wear-resistant studs in HPGRs
© Polysius
10 HRCTMe High Pressure Grinding Roll © Metso
10 HRCTMe High Pressure Grinding Roll
© Metso
11 Enduron HPGR © Weir Minerals
11 Enduron HPGR
© Weir Minerals
12 HPGR at the Cerro Verde Project © Polysius
12 HPGR at the Cerro Verde Project
© Polysius
13 HPGR at the Boddington Gold Mine © Polysius
13 HPGR at the Boddington Gold Mine
© Polysius
14 HRC 3000 at the Morenci Mine © Metso
14 HRC 3000 at the Morenci Mine
© Metso
15 Côté Gold Mine in Northern Ontario © IAMGOLD Corporation
15 Côté Gold Mine in Northern Ontario
© IAMGOLD Corporation
16 Comparison between ball mill and HPGR [12]
16 Comparison between ball mill and HPGR [12]
17 Energy comparison between SAG and HPGR [13]
17 Energy comparison between SAG and HPGR [13]
18 Investment comparison between SAG and HPGR [13]
18 Investment comparison between SAG and HPGR [13]
19 Flowchart for HPGR and Towermills © FLSmidth
19 Flowchart for HPGR and Towermills
© FLSmidth

HPGRs have developed into an efficient process for grinding ore. On account of the high savings in the specific grinding energy required, not only large quantities of energy are reduced in ore beneficiation plants, substantial CO2 savings can be achieved, too. In the following paper, the spotlight is on current developments.

1 Introduction

The quantities of energy used for grinding ore account for around 2 % of global energy consumption. This has become an increasingly important aspect in mining, which can be attributed to the fact that the quantities of ore extracted are steadily increasing to make up for the decreasing content of metal in the ores. This does not even include the investments in new mining operations expected over the next few years. Current figures assume that the global demand for copper alone will increase by 70 % by the year 2050. High growth rates are also expected for other metals, and the...

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