A method and arrangement for isolating a rare - earths - phosphor from the sediment of the screen space which is

摘要

A method and an arrangement for separating a red rare-earth phosphor of a color-television picture tube from the sediment in the drain channels of a screen-coating room, which sediment contains, in addition to various impurities, zinc-sulfide-base and zinc-cadmium-base green and blue phosphors.