HPGR High Pressure Grinding Mill
Application
Single-drive high pressure grinding roll is specially designed to pre-grind the cement clinkers, the mineral dross, the steel clinkers and so on into small granules, to ultra-crush the metallic minerals (iron ores, manga- nese ores, copper ores, lead-zinc ores, vanadium ores and others) and to grind the non-metallic minerals (the coal gangues, feldspar, nephe- line, dolomite, limestone, quartz, etc.) into powder.
Structure & Working Principle
Working Principle Diagram
The single-drive high pressure grinding roll adopts the grinding principle of material aggregate extrusion. One is stationary roll and the other is movable roll. The two rolls rotate oppositely at the same speed. The materials enter from the upper feed opening, and are grinded due to extrusion by high pressure in the gap of the two rolls, and discharged from the bottom.
Drive part
Only one motor drive is needed, the power is transmitted from the stationary roll to the movable roll through the gear system, so that the two rolls are fully synchronized with no sliding friction. The work is all used for material extrusion, and the energy consumption utilization rate is high, which saves 45% of electricity compared to conventional high pressure grinding roll.
Pressure applying system
The combined spring mechanical pressure applying system makes the movable roll avoid flexibly. When there is iron foreign matter entering, the spring pressure applying system directly sets back and reacts in time, ensuring the operation rate is as high as 95%; while the traditional high pressure grinding roll makes avoiding, the hydraulic oil needs to be discharged through the pipeline for pressure relief. The action is delayed, which may cause damage to the roll surface or malfunction of the hydraulic system.
Roll surface
The roll surface is surfacing welded with alloy wear-resistant welding material, and the hardness can reach HRC58-65; the pressure is automatically adjusted with the material, which not only achieves the purpose of grinding, but also protects the roll surface; the movable roll and the stationary roll operate synchronously without sliding friction. Therefore, the service life of the roll surface is much higher than that of the conventional high pressure grinding roll.
Main Technical Features
■High Working Efficiency. Compared with the traditional crushing equipment, the processing capacity increases by 40 - 50%. The processing capacity for PGM1040 can reach around 50 - 100 t/h, with only 90kw power.
■Low Energy Consumption. As per the single roll driving way, it needs only one motor to drive. The energy consumption is very low. Compared with the traditional double drive HPGR, it can reduce the energy consumption by 20~30%.
■Good Wear-resistant Quality. With only one motor driving, the synchronization performance of the two rolls is very good. With wear-resistant welding surfaces, the rolls are with good wear-resistant quality and can be easily maintained.
■High Operation Rate: ≥ 95%. With scientific design, the equipment can be pressurized by the high pressure spring group. The working pressure can be adjusted automatically as per the spring group compress. There is no malfunction point.
■High Automation and easy adjustment. Without the hydraulic system, there is low malfunction rate.
■The roll surface is surfacing welded with alloy wear-resistant welding material, with high hardness and good wear-resistance; The pressure to the spring comes from the reaction force of the material, and the pressure is always balanced, which not only achieves the purpose of crushing, but also protects the roll surface; the movable roll and the stationary roll are meshed and driven by the gear system, and the speed is completely synchronized, thereby avoiding sliding friction between the material and the roll surface. Therefore, the service life is much higher than that of the double drive HPGR.
■Compact structure and small floor space.
