High-Pressure Grinding Roll Mills: The best choice for coarser grinding

High Pressure Grinding Rolls (HPGR) is a mature technology that is proven to reduce capital and operating costs in full scale plants when compared to other comminution technologies.

High Pressure Grinding Rolls (HPGR) are increasingly becoming a part of hard rock processing due to their energy efficiency, ability to induce micro-cracks and preferential liberation, coupled with high throughput and high reduction ratio.

HPGR have been used for many years and are emerging as an energy-efficient alternative to conventional and AG/SAG comminution circuits. One of the interesting features of HPGR is its capability to produce a particle size distribution with a greater than typical amount of fines, thus reducing the power requirement for the downstream ball mill. This makes the use of standard ball mill analyses based on the K80 inadequate, unless appropriate corrections are made.

For coarser grinding, high-pressure grinding rolls (HPGR) are being applied, often as a replacement for the conventional semi-autogenous grinding (SAG) mill, primarily to reduce energy consumption and costs within crushing and grinding circuits. Studies show that, under various conditions, an HPGR circuit can achieve a 15–20% reduction in direct energy (kWh/t or energy cost) compared to traditional SAG mills. HPGR circuits reduce the need for grinding media, and can also provide around 25% reduction in operating costs. These results appear to be a generic feature of HPGR circuits irrespective of the operating conditions.

Westpro offers complete HPGR mill systems designed specifically to meet your crushing or grinding needs. We have a wide range of crusher and mill models to handle various type of aggregate product and process capacities.