Selective recovery of iron (III) and manganese (II) from water solutions in processing of iron–manganese concretions and poor-grade manganese ore

The survival capabilities of depressed mining enterprises can be improved by increasing the production of minerals through the use of unconventional technologies when combined with traditional methods of ore mining.To selectively extract Fe (III) and Mn (II) ions from aqueous solutions of a mixture of their salts, the Fe (III) ions are first extracted with tributyl phosphate from an aqueous solution with a concentration of 3NHCl, 240 NaCl g/dm3 and a temperature of 60 °C with a portioned introduction of TBP at the minimum contact time between the solution and the extractant, then iron ions are reextracted from the extract with water with precipitation of Fe2O3 oxide from the solution and precipitation of manganese from raffinate with ammonia by blowing the solution with air at pH = 8 and a temperature of 60 °C. The method provides high selectivity for the extraction of iron and manganese ions from aqueous solutions of their salts. The result ingsolutio n of ammon ium chloride is rendered harmless by evapor ation, fol lowed by c rystallizat ion of ammo niumchlor ide into a co mmercial p roduct. Sep arate product ion of gaseous b asic (NH3) and acid ic (HCl) re agents can be obt ained by t he interact ion of salts ( NH4)2SO4 and NH4Cl. The process o f metal ext ractionoccu rs in closed p roduction w ithout the re lease of e nvironment ally hazardous co mponentsi nto the env ironment.

Keywords: iron, manganese, tributyl phosphate, solution, hydrochloric acid, sodium chloride, extraction, precipitation.
For citation:

Voropanova L.A., Gagieva F.A., Kokoeva N.B. Selective recovery of iron (III) and manganese (II) from water solutions in processing of iron–manganese concretions and poor-grade manganese ore. MIAB. Mining Inf. Anal. Bull. 2020;(11-1):66-74. [In Russ]. DOI: 10.25018/02361493-2020-111-0-66-74.

Acknowledgements:
Issue number: 11
Year: 2020
Page number: 66-74
ISBN: 0236-1493
UDK: 669.273
DOI: 10.25018/0236-1493-2020-111-0-66-74
Article receipt date: 26.05.2020
Date of review receipt: 03.07.2020
Date of the editorial board′s decision on the article′s publishing: 10.10.2020
About authors:

Voropanova L.A. 1, Dr. Sci. (Eng.) , Professor, lidia_metall@mail.ru;
Gagieva F.A.1, Cand. Sci. (Eng.), Art. teacher, fatima.gagieva.80@mail.ru;
Kokoeva N.B.1, Cand. Sci. (Eng.), Associate Professor, kokoeva.natali.borisovna@yandex.ru;
1 North Caucasian Institute of Mining and Metallurgy (State Technological University), Vladikavkaz, 362021 Russia.

 

For contacts:

L.A. Voropanova, e-mail: lidia_metall@mail.ru

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