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Information × Registration Number 0218U003018, 0116U006400 , R & D reports Title Transformation of magnetic properties of nanoscale iron oxides and hydroxides for optimization of iron-ore-concentrate production popup.stage_title Head Brik Aleksandr Borisovich, Registration Date 11-01-2018 Organization nstitute of Geochemistry, Mineralogy and Ore Formation popup.description2 Collections of natural iron oxides and hydroxides (magnetite, hematite and goethite ores from Kryvyi Rih and Kerch deposits) were created, and their synthetic analogues (magnetite, maggemite, hematite, and goethite) were synthesised. The methods of phase transformations of weakly magnetic iron oxides and hydroxides (hematite, goethite) into highly-magnetic minerals under the influence of three types of reducing agents were developed: water medium - reduction by iron (II) salts, dry medium - reduction by carbohydrates under the influence of temperature, gas medium - reduction by carbon monoxide. Optimal characteristics of external factors (duration, temperature, concentration of reducing agents) of such transformations were defined. The laboratory facilities for low-energy transformation of weakly magnetic iron oxides/hydroxides into strongly magnetic iron oxides were created. The novelty of the results obtained is that the process of phase transformation does not require high temperatures, expensive reagents and occurs during one stage. Product Description popup.authors Багмут Миколай Миколайович Брик Олександр Борисович Дудченко Наталія Олександрівна Калініченко Анатолій Михайлович popup.nrat_date 2020-04-02 Close