Equipment

HPGR

HPGR (High Pressure Grinding Rolls)

 

HPGR, which stands for High Pressure Grinding Rolls, has become widely used for crushing materials in the mining industry over the past 30 years. In 1980, Professor Klaus Schnert, through his study of the physics of material fracture, concluded that the most effective method for material comminution is to pass it through a pressure bed. As a result, Schnert’s research led to the invention of the HPGR machine.

In a HPGR, two rolls are positioned side by side with an adjustable gap, and the material is fed into the gap between the rolls. As the rolls rotate in opposite directions, the material gradually enters the created space and is crushed by the forces exerted by both rolls. Since the grinding process in the HPGR occurs through the force applied by the movable roll, it is crucial to form a bed of material above the HPGR rolls to create a product cake. Additionally, the longer the material remains between the rolls, the more efficient the comminution process will be.

معرفی بخش‌های اصلی آسیای HPGR

 

The primary motivation for using HPGR is energy savings and reduced production costs. Therefore, in plants where HPGR technology has replaced traditional crushing and grinding methods, customers have observed up to a 40% reduction in energy consumption and a significant increase in mineral liberation.

Minerals that are comminuted using HPGR exhibit better leaching performance, as the micro-cracks created on the material’s surface increase the contact area between the particles and the leaching solution. Additionally, flotation process efficiency is further enhanced by the crushing of materials with HPGR.