International Research Journal of Engineering and Technology (IRJET) Volume: 04 Issue: 04 | Apr -2017
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e-ISSN: 2395 -0056 p-ISSN: 2395-0072
Bioflocculation of Egyptian High Manganese Iron Ore Using Paenibacillus polymyxa Bacteria Nagui A. Abdel-Khalek1, Khaled A. Selim1, Mohamed M.A. Hassan2, Moharram M.R.3 Saleh A. M.3, A. M. Ramadan3 1Central
Metallurgical Research and Development Institute, (CMRDI), Helwan, Egypt and Petroleum Engineering Department, Faculty of Engineering, Al-Azhar University, Qena, Egypt 3Mining and Petroleum Department, Faculty of Engineering, Al-Azhar University, Cairo, Egypt
2Mining
-----------------------------------------------------------------------------------***--------------------------------------------------------------------------------Abstract -Paenibacillus polymyxa was used in pretreatment process of iron oxides in the blast furnace. Mn forms of hematite to facilitate the flocculation removal strong oxides, which are partially reduced in the blast ofpyrolusite mineral. The adsorption results showed that the furnace with parts entering the slag. This is why the affinity of P. polymyxa to the two minerals according to the reduction behaviour of Mn in the blast furnace was studied order: hematite>pyrolusite all over the pH range. On extensively before, trying to avoid the harmful effect of Mn applying P. polymyxa bacterial strain, to be used as sole in the ironmaking and steel industries [4, 5, 6]. At the same flocculating reagent, to selectively separate hematite from time, due to the similarity of their chemical and physical its mixture with pyrolusite at pH 6.5 and 5x10 9 cell/ml properties, Fe and Mn are always associated in the Fe and succeeded in the removal of 73.5 % of MnO2 as a concentrate Mn deposits throughout the geological record of different containing about 2.65% MnO2 was obtained from a feed settings and origins [7, 8, 9]. containing about 9.97 % MnO2 with 77 % Wt. % flocculated. Separation of MnO2, from Egyptian iron ores by Applying the same conditions for flocculation of a natural conventional methods of beneficiation is difficult due to iron ore yielded a concentrate containing 2.54% MnO 2, the extremely complex nature of these ores. For this 0.25% SiO2 and 74.40% Fe2O3 with a recovery of 75% from reason, the use of these iron ores is limited in Egyptian a feed containing 8.79% MnO2, 0.49% SiO2 and 67.90% iron and steel industry. Recently, the biological processes Fe2O3. In this paper, the role of Paenibacillus polymyxa on are becoming more attracting in mineral processing due to the surface properties of the two single minerals has been their lower operating costs and their possible applications studied through zeta potential measurements as well as the to treat difficult to beneficiate low grade complex ores. adsorption experiments.Complete characterization of both Microorganisms play an important role in previous studies single minerals and bacterial strain have been done using to develop the bioleaching of manganese from its ores XRD, XRF and FTIR. particularly low grade ores [10, 11, 12]. Paenibacillus polymyxa was utilized to separate silica from iron ore and Key Words: Bioflocculation, Hematite, pyrolusite, P. flocculate silica from some sulphide minerals [13]. polymyxa and adsorption This paper aims to study the role of interaction between isolated Paenibacillus polymyxaon and the surface properties of hematite and pyrolusite single minerals through the zeta potential and adsorption experiments. Flocculation behavior of the two oxides was studied in presence and absence of P. polymyxain. The separation of MnO2 from high manganese iron ores will lead to improvements in reduction of these ores and to manganese recovery which required in its industry as ferromanganese industry.
1.INTRODUCTION The iron ore in Egypt present in different locations as in East Aswan, in the Eastern Desert, at Bahariya Oasis, in the Western Desert, and in several localities of the Eastern Desert near the Red Sea coast. The iron ore deposits of these localities vary greatly in their mineralogical and chemical composition as well as in the nature of their associated rocks, and also in the assemblage of trace elements [1, 2]. These ores suffer from harmful elements as silica, Mn, Ba, carbonates or chlorides. Although manganese is added into steel for its deoxidizing and desulfurizing properties [3], the occurrence of Mn in the iron ore raw materials causes harm to the reduction
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