上下動式抽出装置による粘土中の閃亜鉛鉱粒子の除去

概要

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A reciprocating liquid-liquid coutercurrent extractor was used for The separation of zinc sulfide impurities from a sericite clay. The Zn content in The clay was lowered to about 400ppm by the extraction using kerosene and The follwing informations on The operational conditions were obtainde for good extraction of the impurities. Oil phase should be proper in quantity and dispersion state including number and particle size of oil droplets so that The sulfides can transfer easily into droplets. besides a certain period in which the sulfides and droplets contact adequately with each other is required. Excess feed of The clay suspension causes a flooding phenomenon, i.e. The hold-up of oil phase in the extraction cells, resulting in the decrease of Separation efficiency of the sulfides. In relation to The equipment, the separation efficiency tends to increase when The column length, the span between plates and The reciprocating width of plate are set longer, respectively. The stroke number of plate plays a role regulating The size of oil droplets, so The flooding occurs at low frequencies.
日本粘土学会の論文
1993-05-25