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Mixer-setter has been widely applied in the hydrometallurgy of copper, nickel,cobalt, rare earth, uranium and zinc and environmental protection of chemical industry due to its simple structure, operational stability and ability of bulk processing.And pulsed-sieve-plate extraction column has long been used in the purification of natural uranium and the spent fuel reprocessing because it has the merits of small floor area, good sealability, uniform distribution of droplet, small residue quantity and low entrapped loss of organic phase.