Disaggregation Disaggregation of of geologic materialgeologic material

Selective Fragmentation Selective Fragmentation by HV Pulsed Powerby HV Pulsed Power

Alexander WehAlexander WehselFrag AG

Member of Ammann Group

4900 Langenthal Switzerland

Principle of selective Principle of selective fragmentationfragmentation

using HV pulsed powerusing HV pulsed powerelectrodynamicelectrohydraulic

Water or Oil

Solid

Fragmentation by Explosion

Energy Balance

750 J / Pulse250 kV, 6 kA200 ns

Water or Oil

Solids

Fragmentation by Compression

Energy Balance

6000-10‘000 J / Pulse

Fractures

20 kV, 100 kA1-10s

selFrag - Selective Fragmentation selFrag - Selective Fragmentation Accessory Minerals - Medium Grained GraniteAccessory Minerals - Medium Grained Granite

Idiomorphic zirconcompletely liberated

170 m200 m

Idiomorphic magnetitecompletely liberated

Idiomorphic apatitecompletely liberated

130 m

Sample processing and pictures by E. Gnos, MHN Geneva

selFrag – Selective FragmentationselFrag – Selective FragmentationMicrofossils - RadiolariaMicrofossils - Radiolaria

(image width 160 µm) (image width 90 µm)Sample processing and pictures by E. Gnos, MHN Geneva

selFrag - Selective Fragmentation selFrag - Selective Fragmentation Ultra Fine Grained MyloniteUltra Fine Grained Mylonite

SelFrag (image 30 µm) Disk mill (image 12.6 µm)Sample processing and pictures by E. Gnos, MHN Geneva

selFrag - Selective Fragmentation selFrag - Selective Fragmentation DioriteDiorite Fragmentation Charakteristics

selFrag Lab vs. Jaw Crusher

SelFrag Jaw Crusher

Sample processing and pictures by E. Gnos, MHN Geneva

200

cm

Reaction vessel

Reaction room

Control panel

High voltage unit

selFrag-LabselFrag-Lab: : Laboratory FragmentorLaboratory Fragmentor