High Pressure Grinding Roller (HPGR)
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HPGR - High Pressure Grinding Roll

HPGR - High Pressure Grinding Roll for the minerals industry Global Installations • Canada • Saudi Arabia • Turkey 2 • United Kingdom HPGR equipment is a modern energy-efficient comminution technology. During its relatively short mineral application history, HPGR technology has undergone significant development in machine roll wear surfaces & control philosophy. FLSmidth is a worldwide supplier of HPGRs. HPGR technology has been used in the cement industry for many years. Over the past few years with technological improvements HPGR has also proven itself on more complex and harder ores. The...

If HPGRs are operated correctly, ball mills can be downsized and use smaller grinding media, which substantially reduces steel ball consumption, increases the grinding efficiency and lowers operating costs of the milling substantially. The use of HPGR technology also promotes micro fracturing, which can expose minerals encased or locked within a particular ore. This has positive downstream benefits by improving leach rates and this is particularly evident for heap leach circuits. A flexible solution The HPGR is a flexible solution, highly suitable both for Brownfield expansions and for new...

The FLSmidth Express Frame Express Frame The frame is a fabricated and machined steel welded assembly consisting of upper and lower sections with a pinned gable end section. This gable end is a solid casting. The use of pins allows a frame which is simple to erect and requires a minimum of lay down space for removing the roller assemblies. This Express Frame also incorporates a split-rail technology, in which the bearing notch slides in between two rails. FLSmidth’s Express Frame is designed and built for the rapid replacement of mineral application roll surfaces. The new design offers a...

Features and main components Roller assemblies Roller Assemblies comprise the finished roller tire with studs, edge protection and shaft. The roll shafts are fabricated from forged, heat treated alloy steel with integral journals. The journals have tapered withdrawal sleeves to accommodate the installation of the tapered bore bearings and include the necessary features for hydraulic removal of bearings. The roller sleeve surface is provided with tungsten carbide inserts for wear protection. Edges of the roll also incorporate tungsten carbide sections to improve the protection of that...

Features and main components (cont.) Edge diverter Edge diverter The edge diverting discharge gate incorporates a manually adjustable HPGR discharge diverter capable of 5% adjustment increments to allow up to 40% edge diversion per side. Inlet and cheek plates The inlet is a heavy fabricated steel welded assembly with a flanged connection for the feed chute. The walls of the inlet are lined with easily replaceable wear-resistant plates. Adjustable cheek plate holders attach to the sides of the inlet and are accessed for maintenance through removable cover plates in the flanged connection of...

Lubrication system Roll shaft bearings are lubricated by a circulating oil pump set complete with sump tank, filters, oil / air heat exchanger, heating facilities, flow divider and high temperature transmitter. The system supplies a copious amount of filtered and cooled oil to the bearings to flush away contaminants and carry away heat generated by bearing friction and the heat generated during normal operation. This, along with an improved sealing arrangement for the bearings, provides long service life for the bearings. The heating facility provides for conditioning of the oil prior to a...

FLSmidth® F150 HPGR laboratory test unit FLSmidth F150 HPGR Laboratory Test Unit HPGR product Micro-cracking in HPGR product HPGR flake F150 HPGR laboratory test unit machine specifications: • 500mm Roll Diameter • 300mm Roll Width • (2) 45 kW Motors • Hydraulic drum dumper loads ore in the machine Adjustable diverter cuts edge from center product Discharge chute maintains separate edge and center product Conveyor moves product directly to rotary splitters for sampling

Minerals testing Mineralogy • Quantitative XRD Rietveld mineralogy • SEM and optical microscopy • Automated mineral analysis • NIR data base development • Fourier transform – NIR • Clay analysis Comminution • Bond crushing work & abrasion index • Unconfined compressive strength (UCS) • High pressure grinding rolls & abrasion • JK Drop-Weight & Starkey SAG • Bond work index ball & rod HPGR testing • HPGR specific throughput • Specific energy demand • Specific grinding force • Feed and product PSD • Variable roll speed • Variable operating pressures (6000 kn/m2 max) • One drum of ore per hpgr...

Customer services Customer services FLSmidth is your One Source for spare parts, service, maintenance, asset management, and operational services. Our Customer Services provide a wide range of services for mineral processing equipment and systems including raw material testing, process design, equipment installation, troubleshooting, process and mechanical analysis, and commissioning of new plants. Customers are our most important assets. Once we have designed and installed your processing systems, we do everything possible to provide the tools to ensure that those systems continue to...

HPGR chain of support Equipment island or complete flowsheet supply Complete ore characterization and mineralogy laboratory HPGR design and suitability test facility From comminution to leach and flotation HPGR evaluation Global service Supercenters On-site pilot HPGR and support personnel Global after-sales support Experienced technical and R&D resources for continuous development Full operation and maintenance support Seasoned, published HPGR professionals Flexibility of roll design per ore Purpose designed HPGR for mineral applications