PROCESS FOR OBTAINING ZINC FROM SMOKE DUST FROM ACERIA.

摘要

Process for obtaining zinc from steel fume dust. This invention indicates that the caustic soda solution (NaOH) has a highly selective separation of zinc oxide from the electric arc furnace powders in steelworks through extraction at a temperature of 95-112 ° C. It is very important for a commercial viability the discovery of a process of precipitation of zinc hydroxide from the caustic liquid by hydrolysis of zincatos complex with water, which has successfully achieved a product with the stable composition of 92-95% of ZnO without halogens. In addition, acid is also considered as a viable precipitation agent through a neutralization process to remove zinc hydroxide from the caustic liquid if the accompanying byproduct can be used in other industries simultaneously.