As a part of inducstrial ecological, a new process to condese zinc metal vapor onto the surface of descending ceramic balls in the tower from an electric arc furnace exhaust gas without the formation of zinc oxide has been proposed. Before examining this type of condenser, the abosrption rate of zinc vapor into Pb droplets, which is encountered in the splash condenser in the ISP process, was analyzed as a preliminary reference experiment. The residence time was precisely defined by placing a Pb droplet on a BN plate and then exposed to zinc vapour. The partial pressure of Zn(g) was determined by saturating a Ar+H_2 gas mixture with zinc vapour, followed by diluting it with a Ar+H_2 carrier gas stream. The weight increase of the Pb droplet. was measured after exposing it to the Zn(g) atmosphere for a certain period. The absorption rate of Zn(g) into the Pb droplet was controlled by tranient diffusion of Zn in the liquid Pb. However, possibly because of the temperature gradient and the incomplee mixing of the gases in the absorption chamber, the results were not always consistent.
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