High Pressure Grinding Roller (HPGR)

In the past 10 years, many customers have chosen HPGRs for primary grinding ahead of ball mills where they would have traditionally used SAG mills. Ore complexity, ore hardness, rising electrical costs and the need to stabilize the downstream process are just some of the reasons that more mine owners are choosing HPGRs. These enormous economic and sustainability benefits have driven a significant increase in the number of HPGRs deployed in comminution circuits across the globe.

CLM series HPGR is a kind of grinding equipment designed based on the principle of material bed comminution, mainly composed of a frame, roller assembly, hydraulic system, feeding device, control systems, drive system and so on. CLM series HPGRs deliver high process capacity, low energy consumption, low maintenance requirements, and high availability, perfectly satisfying our mining customers' needs to process higher volumes of ore at the lowest operational cost.

Table of Main Technical Parameters
Series Roller Diameter Roller Width Throughput Max. Feed Size Main Motor Power
1200mm 500-800 mm 200-400 t/h ≤30 mm 2x250-2x400 kW
1500mm 600-1200 mm 400-900 t/h ≤35 mm 2x450-2x900 kW
1700mm 700-1400 mm 650-1300 t/h ≤40 mm 2x630-2x1250 kW
2000mm 800-1400 mm 900-2300 t/h ≤50 mm 2x1000-2x2240 kW
2400mm 1000-1700 mm 2000-4000 t/h ≤60 mm 2x1800-2x3150 kW
2600mm 1200-1800 mm 2700-5000 t/h ≤65 mm 2x2500-2x4000 kW
3000mm 1400-2200 mm 4300-7200 t/h ≤75 mm 2x3550-2x6300 kW
* The above technical parameters are obtained by taking the iron ore (true density of 3.3 t/m³, and medium hardness) as an example, only for reference for model selection. The specific selection parameters shall be based on the experimental data, and will be provided after design of the process plan.  
Open-combined frame & side pull system

LEE JUN adopts the open-combined frame and side pull system for the HPGR maintenance. The roller assemblies are maintained by the rail+maintenance trolley+winch system, greatly simplifying the maintenance of the roller assembly of large HPGR, saving the maintenance time, and reducing the investments in maintenance equipment and infrastructure.

Hydraulic Systems

With German brand OEM auxiliary components as the core, LEE JUN has independently designed and manufactured the hydraulic system based on the concept of "constant roller gap control within a certain pressure range", minimizing the tripping caused by the roller gap difference out of tolerance, which is more efficient and reliable.

The hydraulic system cooperates with the automatic control system, achieving the control over the gap deviation between two rollers and the automatic skewing correction.

Intelligent cloud system
  • Self-perception - Real-time monitoring of equipment operation and dynamic data analysis
  • Self-adaptation - The equipment itself is able to adjust its running state at any time to adapt to the properties of ore materials
  • Self-learning - Learn to establish the comparative analysis model of roller surface studs and to formulate the specific maintenance measures
  • Self-decision-making - Automatically control the process parameters of equipment and system, and make correct and timely equipment operation decisions
Dedicated sliding bearing
  • Unique dedicated sliding bearing - longer service life and suitable for large HPGR
  • The sliding bearing is lubricated with oil - Good cooling effect, sufficient lubrication, strong self-cleaning ability, and capability of taking away the fine powder produced by wear
  • Convenient maintenance – no need bearing shoe grinding, less wearing parts which can be replaced without dismantling the frame and gearbox