PL25614B1 - Method for producing zinc from metallic zinc dust. - Google Patents

Description

In the case of processing dust, for example, dust is rinsed with an acid, for example with the acid of zinc salt to zinc, adhering oxides of nium or sulfuric acid, which impede bonding from one of them, often microscopic, the adhering oxide is removed from the other of small metal particles, but the metal dust is transformed into foam to such an extent that the efficiency is limited to a metal sponge. This metal sponge is only 60-80% of the dust in a wet state and is pressed on a metal body. All the previously used methods, thanks to which oxidation is prevented, are based on the fact that the removal of the metal by minimizing this oxide first or the amount of air contained between mechanically, or with the help of ammonium chloride with special particles metal. In this way, (NHCl) is obtained, as a result of which the remaining particles of mane metal briquettes melt under the metal briquettes more easily fuse on fusing, the covering flux layer, e.g. sal- According to the present invention, flour dust. Then we will give an example of the implementation of the method according to the invention. The zinc dust from the distillation of zinc falling under the microscope as small metal grains contains about 5% of Zn in the form of zinc oxide. This dust is pelleted with water in the tank, and then, by stirring, hydrochloric or sulfuric acid, or another acid, in an amount adjusted to that of zinc oxide, is introduced into the tank. When the liquid is almost inert, it is pumped to the tundish, and the remaining metal sponge is washed away and fed to the briquette press. The remaining liquid is then used to defuse the fresh dust, then the same amount of acid is added as before, it is pumped again into the tundish and the remaining metal sponge is fed to the press and hence the liquid is used until a zinc concentration is reached that allows used for other purposes, e.g. for the electrolysis of zinc, for the production of lithopone (whiteness), zinc chloride, or for the production of zinc sulphite, zinc oxide, etc. Pressed briquettes of metal sponge are dried and then melted under By covering, for example, ammonium chloride in furnaces normally used for remelting zinc. The molten metal is poured into molds. PL

Claims (1)

Claim 1. Process for the production of zinc from metallic zinc dust, characterized in that the oxide adhering to the zinc dust is removed with a suitable acid, then the remaining metal sponge is pressed into briquettes which are then melted. . Slaskie Kopalnie i Cynkownie, Spólka Akcyjna Societe Anonyme des Mines et Usines a Zinc de Silesie, S c h 1 e s i s c h e A k t i e n g e s e 11 s c h a f t fur Bergbau und Z i nkhii 11 enb et r i eb. I n z. J a k ó b W e c h s b e r g. Deputy: Inz. M. Brokman, patent attorney. Printing by L. Boguslawski and Ski, Warsaw. PL