Iron Ore Concentrate for Purifying Water from Oil
YU. A. MIRGOROD1, V. M. FEDOSYUK2 and S. G. EMELYANOV1
1 Southwest State University, Ul. 50 Let Oktyabrya 94, Kursk 305040 (Russia)
E-mail: yu_mirgorod@mail.ru
2 Institute of Solid State and Semiconductor Physics, Scientific-Practical Materials Research Centre, Ul. P. Brovki 17, Minsk 220072 (Belarus)
E-mail: fedosyuk@ifttp.bas-net.by
Keywords: powder, iron ore concentrate, the specific surface area, specific magnetic saturability, Verwey phase transition, oil, water purification
Pages: 315–322
Abstract
With the use of X-ray diffraction, SEM, XFA, IR spectroscopy, and a Cryogenic High Field Measurement System we studied the composition, structure, properties of powders of iron ore concentrate from the Mikhailovskiy OMPE with a view to its use as a magnetic adsorbent for removing oil from the surface of water. It was demonstrated that the specific surface of the concentrate is equal to 1.5 m2/cm3, the concentrate exhibiting hydrophobic properties due to the formation of carbon on the surface thereof after the pyrolysis of the flotation reagent and starch resulting from drying at 800 °С. The specific magnetic saturability of the concentrate is 2.3 times higher than the specific magnetic saturability of pure magnetite, which could be caused by the penetration of iron atoms from the equipment into the interior of the concentrate particles (1 μm from the surface) as a result of the procedures of extraction, grinding, of dry and wet magnetic separation and flotation in the course of obtaining the concentrate. It was noted that the oil exhibits weak magnetic properties due to the presence of natural and man-made magnetic substances therein. After adding 1–5 % of the concentrate the specific magnetic saturability of hydrocarbons reaches 0.6–3 A · m2/kg. Ways to use the concentrate are under discussion.
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