Energy efficient Low operating costs Proven and robust The Pioneer in Material Processing® GRINDING TECHNOLOGY

EIRICH TowerMill A proven vertical agitated media mill ... High-growth markets in copper, iron-ore, gold, lead-zinc ores, mineral sands and rare-earth metals drive increasing demand for fine grinding to maximize recovery. As richer ore reserves are exhausted, finer-grained resources need to be economically processed to satisfy market demands worldwide. To provide an economical solution for modern ore beneficiation plants, EIRICH offers the TowerMill - a proven vertical agitated media mill which combines the benefits of: n energy efficiency, n high throughput, n high availability even in abrasive...

The EIRICH TowerMill product family ranges in installed power from 10 hp to 1,500 hp / 7.5 kW to 1,120 kW with throughputs from 0.5 up to 400 metric tons per hour* *depends on reduction ratio and material properties for energy efficient fine grindingFresh feed size: 3.000 microns (hard rock ores) 10.000 microns (soft ores e.g. limestone)

The TowerMill’s main components are the grinding chamber and the agitator screw. The vertical cylindrical grinding chamber is the heart of the TowerMill where comminution of mineralbearing ores takes place. Like all agitated media mills the grinding chamber is charged with spherical grinding media. The media can be either steel or ceramic balls, depending on the downstream process and end product desired. The grinding media is used by EIRICH’s unique and cost-effective autogenous grid liner system to prevent wear on the inner surface of the grinding chamber. The grid liners, available in carbon...

Advantages at a glance Reduced energy consumption, from 25% to 50% savings compared with conventional mills Longer life of grinding media and wear items High operating availability, typically +95% Fully-enclosed housing ensures reliable performance in harsh outdoor environments Effective autogenous mill liner system requires less maintenance Vertical shaft and screw design ensures symmetrical bearing loads and long service life Less floor space required Fewer moving parts results in higher safety and less maintenance ■ State-of-the-art drive motor exceeds industry efficiency requirements ■ Fully...

Comminution, or the process of size reduction, takes place in agitated media mills when the material to be processed passes through and dynamically interacts with the grinding media. Thousands of contact points between the media act as individual crushers, each further reducing the size of the grinding material. Brought into motion by the spiral agitator screw, the spherical grinding media’s relative movement and spin, combined with evenly-distributed compressive forces only found in a vertical machine arrangement, crush and grind material particles between the spherical media by attrition. ■...

during operation protective layers of grinding balls fill and remain inside the grid segments rotating shaft mill overflow high chrome cast wear liners coarse particle and grinding media down-flow media and slurry agitation movement slurry up-flow feed slurry

EIRICH TowerMill Simple arrangement – Efficient operation The TowerMill is most commonly placed downstream of either a traditional horizontal ball mill or, more recently, high pressure grinding rolls (HPGRs). The product exiting these mills is first fed to a slurry tank. In a scalped-feed arrangement (see illustration) fresh material is pumped to a hydrocyclone cluster to separate the coarse and fine particles. Fines are directed downstream while coarse particles are sent to the TowerMill inlet flange. The inlet can be located either at the top or bottom of the grinding chamber. For coarse feed,...

Real-time monitoring The addition of proven, robust TowerMill instrumentation allows for real-time monitoring of critical equipment parameters, which results in high operating availability even in remote installations or where few operator personnel are available. separating hydrocyclone cluster The result A TowerMill installation offers processing plants a simple, proven technology combined with reduced operating costs, to produce premium-quality ore concentrates. product slurry feed slurry slurry tank hydrocyclone feed pump

EIRICH TowerMill Powerful – Proven – Reliable – Robust Over 200 plants worldwide have energy-efficient TowerMills for grinding over 40 different types of materials. Typical markets are mining & minerals processing, recycling and environmental protection. Application: Iron ore – magnetite TowerMill Installation: Karara Iron Ore Project hydrocyclone magnetic separator hydrocyclone magnetic separator coarse classifier flotation recirculation pump horizontal ball mill slurry pump slurry pump tailings disposal *High Pressure Grinding Rolls 5 units ETM-1500 Installed power: 5 x 1.1 MW Karara Iron Ore...

Karara, Western Australia

EIRICH TowerMill Powerful – Proven – Reliable – Robust Application: Iron ore – magnetite TowerMill Installation: Western Asia Magnetite Project hydrocyclone SAG mill* magnetic separator magnetic separator coarse classifier flotation recirculation pump horizontal ball mill slurry pump slurry pump tailings disposal *Semi-Autogenous Grinding Mill 5 units ETM-1500 Installed power: 5 x 1.1 MW 4 units: Feed size: F80 = 80 microns Product size: P80 = 38 microns Throughput: 130 t / hr / TowerMill 1 unit on stand-by Delivery date: 200

5 units ETM-1500 Western Asia

EIRICH TowerMill Powerful – Proven – Reliable – Robust Application: Gold ore TowerMill Installation: Shandong Gold Project flotation hydrocyclone coarse classifier TowerMill horizontal ball mill slurry pump slurry pump *Autogenous Grinding Mill 1 unit ETM-1250 Installed power: 1 MW Shandong Province, China Feed size: F80 = 130 microns Product size: P80 = 15 microns Throughput: 63 t / hr / TowerMill Delivery date: February 2011

-1250 Shandong Gold hina installed 2011