inlet nozzles or slots 33 the concentric or tangentional orientation of the nozzles 33 induces a vortex flow of such liquid in the chamber 18 as indicated by the arrows 66 in fig3 this vortex flow improves the efficiency of the device 10 in collecting metal ions on the interior wall of the cathode shell 13 the plate or disc 49 which extendsin a plane parallel to and spaced from the inner surface 20 of the lower end plate 12 is believed to increase turbulance and collector efficiency in the associated end of the collection chamber 18 fluid having moved ina helical path from the upper end of the chamber 18 the lower end flows radially inward enters the intake holes 58 in the anode tube 48 flows axially upward through the tube reaches the outlet bore 34 and is discharged from the outlet port 29 when a sufficient amount of metal has been collected on the interior of theshell 13 the shell can be removed from the other elements of the device 10 this removal is simply accomplished by the user by removing the cap screw 56 and separating the shell 13 from the end plates 11 12 because of its simplicity and minimal fabrication requirements the shell 13 can be treated as a disposable item to be sent off with the reclaimed metal toa metal recycler for reuse of the device a new shell 13 is assembled withthe other described elements while the invention has been shown and described with respect to a particular embodiment thereof.