Production of Ferric Complex Compounds f

Study on oxide scales of products is of greater importance to manufacturers and consumers. These secondary and tertiary scales must be recycled because of high iron content. If these residues are not effectively treated, not only the environment will be seriously polluted, but also the resources will be wasted. In this study, the extraction of iron from Turkish hot rolled iron-steel oxide scale was attempted using atmospheric acid leaching. The effects of the several parameters which included solid/liquid ratio, leaching time, leaching temperature and acid concentration upon leaching efficiency of iron were investigated. The volumetric titration results showed that the amount of Fe+2 and Fe+3 could reach respectively 47% and %38 at 60°C temperature in 6N HCl acid concentration during 60 minutes leaching time. Two alternative methods which were atmospheric evaporation and alkaline precipitation have been successfully applied by using leaching solution as iron chloride source. The experimental results show that FeCl3 was obtained by atmospheric evaporation method with a small amount of FeCl2. Alkaline precipitation method’s results show that the iron was existed in ferric hydroxide formation. Both precipitate and crystallized products have been iron products which are frequently used as an adsorbent to remove various heavy metals (i.e., arsenic and chromium) from contaminated soil and water and also flocculation agent.