Studying of possibility for breakdown of ilmenite concentrate  with ammonium sulphate

G.F. Krysenko; D.G. Epov; M.A. Medkov; E.B. Merkulov

doi:10.31643/2020/6445.03

Authors

G.F. Krysenko Russian Academy of Sciences
D.G. Epov Russian Academy of Sciences
M.A. Medkov Russian Academy of Sciences
E.B. Merkulov Russian Academy of Sciences

DOI:

https://doi.org/10.31643/2020/6445.03

Keywords:

ilmenite concentrate, ammonium sulfate, solid-phase interaction, ammonium and titanyl double sulfate, ammonium and iron double sulfate, water leaching.

Abstract

The data on investigation of the possibility of breakdown of ilmenite concentrate of the Ariadnensky deposit in Primorsky Krai with ammonium sulfate are presented in the article. For study the ilmenite concentrate and ammonium sulfate interaction, the concentrate and (NH₄)₂SO₄ were mixed based on the formation of sulfates of the main components of the concentrate and then double sulfates of the components of the concentrate and ammonium. The interaction was carried out in glassy carbon crucibles, which were placed in a muffle furnace controller company Nabertherm GmbH (Germany). The weight of sample was 10–40 g. Thermogravimetry, X-ray diffraction and atomic absorption analyses were used in the study. It was found that when the temperature of thermal decomposition of (NH₄)₂SO₄ (300⁰С) is reached, the interaction of the main components of the concentrate with (NH₄)₂SO₄ begins and proceeds in the temperature range of 300-360⁰С with the formation of a mixture of double salts well soluble in water - ammonium sulfate and iron compounds (NH₄)₂Fe₂(SO₄)₃ and NH₄Fe(SO₄)₂ and ammonium sulfate and titanyl of the composition (NH₄)₂TiO(SO₄)₂. The interaction at a temperature above 360⁰С leads to thermal decomposition of the formed double sulfates of ammonium and titanyl and ammonium and iron to sulfates and then oxides. It was shown that water leaching of the product of the interaction of ilmenite concentrate with (NH₄)₂SO₄ at 360⁰С allows to extract practically all titanium and the bulk of iron to water in the form of well soluble double salts. The conditions for the titanium dioxide separation in the form of anatase from the water leaching solution were found.

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Author Biographies

G.F. Krysenko, Russian Academy of Sciences

Institute of Chemistry of the Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, Russia; mineral processing laboratory. Cand. chem. sciences.

D.G. Epov, Russian Academy of Sciences

Institute of Chemistry of the Far East Branch of the Russian Academy of Sciences, Vladivostok, Russia; mineral processing laboratory. Cand. chem. sciences.

M.A. Medkov, Russian Academy of Sciences

Institute of Chemistry of the Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, Russia; mineral processing laboratory. Doc. chem. sciences, professor

E.B. Merkulov, Russian Academy of Sciences

Institute of Chemistry of the Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, Russia; laboratory of optical materials. Cand. chem. sciences.

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