Complete Processing of the High-Iron Content Red Mud

Abstract:

When bauxites from the Middle Timan and Severouralsk deposits are processed into alumina by the low-temperature sintered process the high-iron content red mud can be obtained. The red mud contain up to 58 % of iron and are a potential raw material for ferrous metallurgy. Rare earth elements (REEs) such as Sc, Y and La are converted from bauxites to red mud in the form of hydroxides during processing and are easily leached by weak acid solutions. In this work, the red mud is treated with a solution of sulfuric acid (pH = 2.5–5), the REEs pass into solution, and then the solution is neutralized to obtain a precipitate, i.e. a concentrate of rare elements. The recovery of REEs is about 75–90 % (Sc, Y, La). The high-iron content red mud is converted to the naturally-doped cast iron and titanium slag (up to 50 wt.% TiO₂). As a result of processing bauxite, alumina (Al₂O₃), the naturally-doped cast iron, concentrate of REEs (Sc, Y, La, etc.) and titanium slag (TiO₂) are obtained. The flowsheet of the proposed complete processing of the high-iron content red mud is given.

• Periodical: Materials Science Forum (Volume 946)
• Pages: 569-574
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.946.569
• Online since: February 2019
• Authors: Irina V. Loginova*, Aleksei V. Kyrchikov
• Keywords: Bauxite Residue, High-Iron Content Red Mud, Naturally-Doped Cast Iron, REE Concentrate, Scandium, Titanium Slag, Yttrium

References

[1] I.V. Loginova, A.V. Kyrchikov, N.P. Peniugalova, Tekhnologiia proizvodstva glinozema [Alumina production technology], Izdatelstvo Uralskogo universitetata, Ekaterinburg, (2015).

[2] V.Ia. Abramov, I.V. Nikolaev, G.D. Stelmakova, Fiziko-khimicheskie osnovy kompleksnoi pererabotki aliuminievogo syria (shchelochnye sposoby) [Physicochemical basis of complex processing of aluminum raw materials (alkaline methods)], Metallurgiia, Moscow, (1985).

[3] A.I. Ivanov, G.N. Kozhevnikov, F.G. Sitdikov, L.P. Ivanova, Kompleksnaia pererabotka boksitov [Complex bauxite processing], UrO RAN, Ekaterinburg, (2003).

[4] I.V. Loginova, V.A. Lebedev, S.F. Ordon, A.V. Kyrchikov, Povyshenie kompleksnosti pererabotki sredne-timanskikh boksitov [Increase in the complexity of processing Sredny-Timan bauxites], TSvetnye metally. 7 (2010) 45–48.

[5] A.I. Lainer, N.I. Eremin, IU.A. Lainer, I.Z. Pevzner, Proizvodstvo glinozema [Alumina production], second ed., Metallurgiya, Moscow, (1978).

[6] Information on http://media.ls.urfu.ru/201/584/1262.

[7] I.V Loginova, A.A. SHoppert, D.A. Rogozhnikov, A.V. Kyrchikov, Proizvodstvo glinozema i ekonomicheskie raschety v tsvetnoi metallurgii [Alumina production and economic calculations in non-ferrous metallurgy], Izdatelstvo UMTS UPI, Ekaterinburg, (2016).

[8] I.V. Loginova, A.A. SHoppert, I.S. Lysova, Izuchenie vozmozhnosti kompleksnoi pererabotki boksitovogo syria na primere boksitov Sredne-Timanskogo mestorozhdeniia [Study of the possibility of complex processing of bauxite raw materials on the example of bauxites of the Sredny-Timanskoye deposit], Metallurgiia legkikh i tugoplavkikh metallov, 3 (2014) 48-54.

[9] I.V. Loginova, IU.N. Loginov, A.V. Kyrchikov, RF Patent 2494965.28. (2013).

[10] I.V. Loginova, A.V. Kyrchikov, V.A. Lebedev, S.F. Ordon, Izuchenie voprosa kompleksnoi pererabotki boksitov Sredne-Timanskogo mestorozhdeniia [The study of the complex processing of bauxites from the Sredny-Timanskoye deposit], Izvestiia VUZ:TSvetnaia metallurgiia, 1 (2013) 27-32.

[11] I.V. Loginova A.V. Kyrchikov, V.A. Lebedev, S.F. Ordon, Investigation into the Question of Complex Processing of Bauxites of the Srednetimanskoe Deposit, Russian Journal of Non-Ferrous Metals. 54 (2013) 143-147.

DOI: 10.3103/s1067821213020089

[12] A.F. Vorobev, Obshchaia i neorganicheskaia khimiia [General and inorganic chemistry], Akademkniga, Moscow, (2006).

[13] R.A. Lidin, KHimicheskie svoistva neorganicheskikh veshchestv, fifth ed., [Chemical properties of inorganic substances], KolosS, Moscow, (2008).

[14] I.V. Loginova, A.A. SHoppert, A.V. Kyrchikov, S.F. Ordon, I.S. Mediankina, Krasnye shlamy glinozemnogo proizvodstva kak vysokozhelezistoe syre dlia chernoi metallurgii [Red muds of alumina production as high-iron raw materials for ferrous metallurgy], Stal, 1 (2016) 67-70.

[15] I.IU. Kozhevnikov, Okuskovanie i osnovy metallurgii [Pelletization and the fundamentals of metallurgy], Metallurgiya, Moscow, (1991).

[16] O.IU. SHeshukov, V.I. Zhukov, L.A. Smirnov, E.IU. Lozovaia, Osnovy metallurgii chernykh metallov [Basics of metallurgy of ferrous metals], GOU VPO UGTU-UPI, Ekaterinburg, (2003).