the addition of a separate cathode particulates conveyance system 100 that manipulates cathode particulates motion substantially independently from the catholyte flow 30 in contrast with the prior art pumping systems similar to one depicted in fig1 the external catholyte pumping station 110 of current invention in fig2 needs only provide relatively slow catholyte flow 30 and can be readily adjusted and directed throughout the cathode particles bed for easy process optimization without significantly altering the particles bed motion the pumping station 110 of current invention requires relatively lower pumping capacity resulting in smaller size lower cost and most importantly lower electric energy consumption and the ability to readily manipulate and control the catholyte flow rate and pattern with the moving cathode particles bed the principle difference in the catholyte flow 30 and cathode particulates convection 120 between the prior art cells with spouting tubes 300 u201c draft tube 15 u201d in u s pat nos 5 635 051 and 5 958 210 and the electrolytic cell with a separate cathode particulates conveyance system 100 of current invention is given schematically in fig3 a and fig3 b while the spouting tube 300 of a prior art cell induces vigorous catholyte flow 30 causing circulation of excessive volumes of catholyte in order to indirectly produce sufficient cathode particulates convection 120 the particulates conveyance system transfer.