Research on the Chemical Characterization of the Oily Mill Scale for Natural Resources Conservation

The paper presents an assessment of the chemical composition of the oily mill scale from wastewater treatment. The determination of chemical composition of the wastes samples was achieved by spectrophotometric methods. The device used was a spectrometer based on X-ray fluorescence and a atomic absorption spectrophotometer. The chemical composition of the oily mill scale varies according to: the chemical composition of the raw materials used in the steelmaking process, the quality of the raw materials, the chemical composition of the auxiliary materials, the auxiliary materials used in the steelmaking process (oxidants (iron ore), ferroalloys (FeNi, FeCr, FeMn, FeMo, FeV)) and the type of steel produced. The results show that the oily mill scale is a significant source of metallic mineral resources. The recovery of the metallic minerals from oily mill, followed by their usage as a raw or auxiliary material to the steelmaking, leads to natural resources conservation.