Separation of Ferromanganese Ore Components by Reduction with Carbon and Carbon Monoxide
Kosdauletov N. Mukhambetgaliev E.K. Roshchin V.E.
April 2022Pleiades Publishing
Steel in Translation
2022#52Issue 4416 - 421 pp.
Abstract: Experiments confirm that selective solid-phase reduction of iron and phosphorus in ferromanganese ore is possible. A laboratory Tamman furnace at 1000°C is used, with holding for 2 and 5 h. The phase composition and phase ratio of the reduction products are investigated, as well as their chemical composition. Reductive annealing in an atmosphere of carbon monoxide converts the oxide phase into metallic iron and phosphorus. The manganese oxide (MnO) concentration in the ore’s oxide phase increases here. In these conditions, the use of solid carbon as a reducing agent converts not only the iron and phosphorus but also some of the manganese to the metallic phase. On the basis of the results, selective reduction of iron and phosphorus at 1000°C by reducing gas is proposed. By gas reduction, existing gas furnaces—in particular, multihearth furnaces—may be used for the reduction of iron and phosphorus from ferromanganese ore. The gas used as a reducing agent and working medium may be natural gas (including hydrogen-enriched natural gas) or even pure hydrogen. By this means, the emissions of carbon dioxide, which is a greenhouse gas, may be decreased in the extraction of metal for the production of manganese alloys from ore. The results may be used in developing theoretical and practical principles for the processing of ferromanganese ore with elevated phosphorus content, which is not feasible by existing methods.
carbon-based reducing agents , concentrate , direct and indirect reduction , ferromanganese , ferromanganese ore , iron , manganese , phosphorus , reduction temperature
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South Ural State University, Chelyabinsk, 454080, Russian Federation
Abishev Chemical and Metallurgical Institute, Karaganda, 100009, Kazakhstan
South Ural State University
Abishev Chemical and Metallurgical Institute
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