| 摘要 |
<p>PURPOSE: A method for recovering/recycling Zn-dross from a zinc bath is provided to enhance the degree of recovery in recycling while enhancing recycling efficiency by removing Al or Al alloys existing as impurity in Zn-dross by the addition of Fe and separation accelerant. CONSTITUTION: Zn-dross is weighed and its constituents are analysed. Zn-dross is inputted into a furnace and heated at 600 to 700deg.C. Fe powder with particle size distribution ranging from 50 to 120 mesh is added and stirred for 1 to 3 hours for chemical reaction into FeAl3 and FeAl2. Separation accelerant is uniformly poured in the surface of a melted substance to accelerate separation of the melted substance, FeAl3 and oxides. Fixation is carried out for 20 to 40 minutes for separation due to the difference in specific gravity. The oxides, FeAl3, FeAl2 and the like rising to the surface of the melted substance is collected by a thin sieve. The melted substance is stirred for 5 to 10 minutes to make the specific gravity of the Zn melted substance uniform. The melted substance is poured into a forming mold to obtain a final product.</p> |
