Abstract
The possibility of selective reduction of iron from complex oxides by carbon monoxide gas is investigated. Brazilian ore rich in manganese oxide, ferromanganese ore from the Selezenskoye Deposit (Russia) and concentrate from the Zhayrem GOK (Kazakhstan) were used as samples. Experiments have shown that it is possible to selectively reduce iron from complex manganese ores to a metallic state not only with solid carbon, but also with carbon monoxide. Experimental results of solid-phase reduction showed that at a temperature of 900 °C. With an exposure time of 1.5 hours, the release of metallic iron is detected. At the same time, in the atmosphere with the metal phase, there is no presence of other elements other than iron in the metal. As the temperature rises to 1000 °C, the amount of metallic iron, as well as manganese and phosphorus, increases. At a temperature of 1000 °C, phosphorus turns into metal, despite the type of reducing agent. In all experiments, oxides of manganese, silicon and calcium remained in the oxide part.
Highlights
The ferrous metallurgy is the major consumer of manganese products in the world
In Kazakhstan at the Western Kamys deposit the reserves of oxidized manganese ores are estimated to be 700–800 thousand tons [15], and most of this raw material base is represented by the ferromanganese ores
The aim of this work Was a comparative assessment of the possibility of selective reduction of metals from manganese ores using solid carbon and gaseous carbon monoxide as reducing agents
Summary
The ferrous metallurgy is the major consumer of manganese products in the world. Approximately 95 % of all the manganese ore is consumed during production of steel, mostly in the form of ferromanganese or silicomanganese, as well as in the form of other small-scale production associated with ferroalloys [1,2]. There are large reserves of low-quality ferromanganese ores in the CIS countries, which after processing can be considered as an alternative raw material base for manganese production. In Kazakhstan at the Western Kamys deposit the reserves of oxidized manganese ores are estimated to be 700–800 thousand tons [15], and most of this raw material base is represented by the ferromanganese ores. In addition to the ores of the Western Kamys deposit, iron-manganese ores are found in other deposits of central Kazakhstan. These deposits have large amount of manganese ores with a high iron content [16].
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