Developed for ISO-compliant sieving in the mining industry

The HP-SST enables the effective determination of the particle size distribution of a sample by means of set sieving. The machine can accommodate up to 8-10 screens of different mesh sizes. The machine was developed for integration in robot laboratories in the mining industry and ensures, for example, the determination of the grain size fractions of iron ore samples in accordance with ISO 4701.

Optimized processes

The sample is fed into the HP-SST by the robot via a hopper and the sieving process is started by means of oscillation movements. At this point, the screens are firmly and securely clamped by the clamping unit. Once the sieving process is complete, the clamping unit is moved again so that the screens can be removed one after the other by the robot.

The screens are emptied and cleaned in a special station. The discarded oversize grain is weighed in the station to determine the respective grain size fraction. The emptied sieves are then placed on a separate scale to determine any plugged grain in the sieve. If a certain limit value for the acceptable percentage of plugged particles is exceeded, the sieve can be discharged into a magazine for manual cleaning by the operator.

Otherwise, the emptied and cleaned screens are temporarily stored and then reloaded into the screening machine by the robot in reverse order. The HP-SST is then ready for the next sample.

Robust design

All components of the HP-SST, including the frame and bearings, are designed to withstand the mechanical stresses of the screening process and exposure to dust from the ore material. This enables machine operation with long service lives and maintenance intervals.