Advances in Fine Grinding and Classification

Energy Trends

Advances in Fine Grinding and Classification

Quelle/Source: Metso

1 Mahlstufen bei Erzen • Grinding stages in an ore processing plant

Quelle/Source: Metso

Quelle/Source: ThyssenKrupp Industrial Solutions

2 HPGR in der Kupfererzaufbereitung • HPGRs in a copper ore processing plant

Quelle/Source: ThyssenKrupp Industrial Solutions

Quelle/Source: OneStone

3 Grundschema der Flotation mit Nachvermahlung • Basic schematic of a flotation system with regrinding

Quelle/Source: OneStone

Quelle/Source: Metso

4 Vertimill

Quelle/Source: Metso

Quelle/Source: Glencore Technologies

5 IsaMill^TM

Quelle/Source: Glencore Technologies

Quelle/Source: Outotec

6 Fließschema mit Mahlstufen/Flotation • Flow sheet with grinding stages/flotation

Quelle/Source: Outotec

Quelle/Source: Derrick Corporation

7 Derrick Stack Sizer

Quelle/Source: Derrick Corporation

Quelle/Source: Metso

8 Grundprinzip der Tower-/Vertimill • Basic principle of the Tower/Vertimill

Quelle/Source: Metso

Quelle/Source: Eirich

9 Towermill in der Erzaufbereitung • Towermill in an ore processing plant

Quelle/Source: Eirich

Quelle/Source: Metso

10 Vertimills bei Northland Resources • Vertimills at Northland Resources

Quelle/Source: Metso

Quelle/Source: FLSmidth

11 Schema der VPX • Schematic of a VPX mill

Quelle/Source: FLSmidth

12 VPX in der Erzaufbereitung • VPX mill in an ore processing plant

Quelle/Source: FLSmidth

Quelle/Source: Metso

13 SMP-Mühle • SMP mill

Quelle/Source: Metso

Quelle/Source: Outotec

14 Illustration HIG-Mühlen • Illustration showing HIG mills

Quelle/Source: Outotec

Quelle/Source: Metso

15 Energiebedarf Rührwerkskugelmühlen • Energy requirement of stirred ball mills

Quelle/Source: Metso

Quelle/Source: Glencore Technologies

16 IsaMill^TM während einer Wartung • IsaMill^TM during maintenance

Quelle/Source: Glencore Technologies

17 M10000 IsaMill^TM

Quelle/Source: Glencore Technologies

Quelle/Source: Derrick Corporation

18 Schema Derrick Stack Sizer • Schematic of a Derrick Stack Sizer

Quelle/Source: Derrick Corporation

19 Stack Sizer in der Erzaufbereitung • Stack Sizer in an ore processing plant

Quelle/Source: Derrick Corporation

20 Vergleich Klassierung bei KMAruba: Vorher (links) – nachher (rechts) [11] • Comparison of classification at KMAruba: Before (left) – after (right) [11]

Quelle/Source: Metso

Rührwerkskugelmühle in der Erzaufbereitung • Stirred ball mill in an ore processing plant

Quelle/Source: Metso

Summary: In the ore-processing sector, ball mills are increasingly being replaced by more energy-efficient grinding processes. This trend commenced in the regrinding of flotation products, progressed into the tertiary grinding stage and is now also changing the technology of secondary grinding. Furthermore, advances are also taking place in classification processes. This article describes the new processes and discusses the potential that they offer.

1 Introduction

Available resource deposits with a high content of useful minerals are becoming scarcer and scarcer. As a rule, the resources mined today can be described as finely and extremely finely intergrown ores. They require ore liberation to a size of 50 µm (0.05 mm) or even much finer. This particularly applies to polymetallic deposits with a complex composition. Such ores correspondingly require a comparatively high degree of processing effort. A large proportion of the operating expense for processing plants is accounted for by the crushing and grinding processes. The costs for ore...