The general application of the HP-BTM2 is particle size reduction and sub-sampling in order to obtain a representative sample for final analysis with X-ray fluorescence.
To cover a broad range of applications the input weight can be between 1 and 15 kg. The maximum particle size, which can be introduced in the HP-BTM2, is 50 mm. To eliminate operational risks, the sample weights are monitored after each preparation step.
The input is designed to allow an easy transfer of the material into the bucket with 5 l volume. In the magazine up to 15 of those buckets can be stored. The operator can choose different customized programs for sample preparation for each of those buckets.
The first preparation step is a size reduction done by a jaw crusher. A vibration feeder which is located below the crusher ensures a constant material flow into the subsequent linear splitting unit. The linear splitter allows a representative sub-sampling of adjustable volumes into two cups (1.5 l). Calculating the desired splitting ratio (sample/residue material) is done automatically. Residual material is discharged via a vibration feeder to a waste bucket or a de-dusting system.
This unit basically consists of a pulverizing mill with the maximum capacity of approx. 1.5l. These mills allow fine grinding of the crushed material to a particle size suitable for creating a final sub-sample. This pulverized sub-sample can be used, e.g., for the preparation of fused beads for chemical analysis by XRF. For further reducing of the sample volume, a second dosing device transfers the material into small vials (100 ml). The material which has not been dosed into the vial will remain in the cup and can be used as a backup sample.