Termomagnetic investigations influence coal and organic carbon on transformation structure of hematite to magnetite


  • N. O. Dudchenko Institute of Geochemistry, Mineralogy and Ore Formation M.P. Semenenko NAS of Ukraine
  • O. B. Bryk Institute of Geochemistry, Mineralogy and Ore Formation M.P. Semenenko NAS of Ukraine

Abstract

Thermomagnetic investigations of hematite into magnetite transformations by activated carbon and starch were carried-out using laboratory facility, that allows automatic registration of sample magnetization with the temperature (the rate of sample heating/cooling was 65-80°/min). It was shown, that reduction of hematite by starch occurs by the temperatures up to 650°С and leads to formation of magnetic material with saturation magnetization ~50 А*m2/kg. Reduction of hematite by activated coal in the same temperature range leads to formation of the product with saturation magnetization ~0,5 А*m2/kg. The problem of the development and introduction of new energy-efficient methods of enriching these types of iron ore, which can significantly increase the profitability of using oxidized iron ore in the creation of iron ore and iron ore solve the environmental problems of the regions. Thermomagnetic curves have received in magnetic hematite transformation product using as a reducing agent activated carbon ZL-302 and compare it with starch, proposed a method developed by us. It is shown that reduction of hematite to magnetite using coal ZL-302 is at a much higher temperature compared to starch. Recovery hematite by starch in the temperature range 400 ° -650 ° C results in a product with magnetization ~ 50 A * m2 / kg. Restoration of charcoal hematite in the same temperature range results in a product with magnetization ~ 0.5 A * m2 / kg, and when heated to 800 ° C magnetization increases to ~ 10 * m2 / kg. Thus, hematite ores starch recovery is less energy that can be used to develop new ways to get iron ore concentrates.Key words: hematite, magnetite, phase transformations, thermomagneic investigations. 

Author Biographies

N. O. Dudchenko, Institute of Geochemistry, Mineralogy and Ore Formation M.P. Semenenko NAS of Ukraine
Institute of Geochemistry, Mineralogy and Ore Formation M.P. Semenenko NAS of Ukraine
O. B. Bryk, Institute of Geochemistry, Mineralogy and Ore Formation M.P. Semenenko NAS of Ukraine
Institute of Geochemistry, Mineralogy and Ore Formation M.P. Semenenko NAS of Ukraine

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Published
2014-12-17
How to Cite
Dudchenko, N., & Bryk, O. (2014). Termomagnetic investigations influence coal and organic carbon on transformation structure of hematite to magnetite. Journal of Geology, Geography and Geoecology, 22(3/2), 21-29. https://doi.org/https://doi.org/10.15421/111403