Work number - M 15 FILED
Presented M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the NAS of Ukraine
Authors:
Antonenko (Savchenko) Tetiana
The aim of scientific work was to synthesize of magnetic samples from low-magnetic iron oxides and hydroxides of various origin, to determine of patterns of magnetic samples formation, depending on external influences (temperature, pressure, aqueous solution of ferrous sulphate, microwave heating), as well as to develop, based on the results, recommendations for transformation of low-magnetic iron minerals to high-magnetic ones for creation of iron ore concentrates.
Based on theoretical studies and experiments, the author has determined that the transformation of the structure and magnetic characteristics of samples of both synthetic and natural goethite and hematite occurs at temperatures below 100 °C under the influence of microwave heating in the presence of iron salt (iron (II) sulphate) and alkali (ammonia hydroxide) in aqueous medium, as well as in the presence of starch gel under the heating of the mixture using microwave radiation. As a result of the transformation, magnetite was formed, and the magnetization of the obtained samples increases dozens of times. Scientific bases have been created to explain the mechanisms of transformation of goethite and hematite to magnetite in aqueous medium.
The basic conceptual framework has been formulated for solving both the applied problems, related to the both processing of oxidized iron ores of the Kryvyi Rih basin and the ecological problems of the iron ore regions, as well as the fundamental problems, related to the mechanisms of transformation of the properties of iron minerals.
There are no analogues in Ukraine for the methods of transformation of the magnetic properties of low-magnetic oxidized iron ores and iron ore waste. In the world, the investigations in this direction are ongoing, but the methods of transformation of goethite and hematite to magnetite are differ.
Methods of transformation of goethite and hematite to magnetite in aqueous medium are proposed for the development of new methodologies for the production of iron ore concentrates from hardly enriched iron ore. The implementation of the results of scientific work opens new opportunities for the production of high quality iron ore concentrates from oxidized iron ores and waste of mining and processing plants.
The obtained results, if implemented, will help to expand the mineral resource base of Ukraine (production of magnetite concentrate) and increase the efficacy of iron ores usage, as well as reduction of waste of their usage, which adversely affect the environment.
The results obtained will help to expand the mineral resource base of Ukraine (production of magnetite concentrate) and increase the efficacy of iron ores usage, as well as will reduce the amount of iron ore wastes, which adversely affect the environment.
Number of publications: 8 articles. According to the Web of Science database, the total number of links is 3, h-index (at work) = 1; According to the Google Scholar database, the total number of links is 17, h-index (at work) = 2. According to the Scopus database, the total number of links is 2, h-index (at work) = 1.
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