PRODUCTION OF FERRIC COMPLEX COMPOUNDS FOR WASTEWATER TREATMENT FROM HOT ROLLED IRON-STEEL SOLID WASTE

Year 2019, Volume: 2 Issue: 1, 1 - 7, 30.06.2019

Elif Uzun

Abstract

Abstract

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 crystalized 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.

Keywords

ferric hydroxide, Iron(III)chloride, oxide scale, hydrometallurg

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