Search academic texts

Information × Registration Number 0226U000460, (0125U000314) , R & D reports Title Research on the process of obtaining metals and alloys by the method of thermal dissociation of oxides popup.stage_title Узагальнення наукової інформації щодо наявних методів прямого отримання заліза. Встановлювання термодинамічних і фізико-хімічних передумов прямого отримання заліза термічною дисоціацією оксидів; розробка конструкції лабораторного устаткування і визначення умов прямого отримання заліза термічною дисоціацією оксидів за умов зниженого тиску на прикладі легкоплавких оксидів. Head Holub Tetiana S., Кандидат технічних наук Registration Date 09-01-2026 Organization Institute of Ferrous Metallurgy. ZI Nekrasov of the National Academy of Sciences of Ukraine popup.description1 Research and scientific justification of the possibility of direct production of iron by thermal dissociation of oxides popup.description2 The scientific information on the available methods of direct iron production was summarized. It was noted that direct reduction processes using carbon-containing reductants do not completely solve the problem of CO2 emissions. And the hydrogen reduction processes are limited by the currently available hydrogen production capacities and require large investments of electrical energy. This makes it urgent to search for other alternative methods of obtaining metals and alloys based on iron, among which thermolysis occupies an important place. By means of thermodynamic analysis, the feasibility of using methods of thermal decomposition of iron oxides under reduced pressure was justified, which contributes to a decrease in the partial pressure of oxygen in the system and the temperature of the onset of oxide decomposition. The need to create a vacuum at the level of 10-5 atm was established to achieve a significant decrease in the temperature of the onset of decomposition of iron oxides with the production of pure iron. For the first stage of the hematite-magnetite transition, in order to achieve a decrease in the decomposition temperature to 1200 °C, it is necessary to create a vacuum at a level of 0.005 - 0.001 atm. The design of laboratory equipment for the process of decomposition of iron oxides under the influence of temperature using a spiral heater and reduced pressure has been developed and a number of studies have been conducted. It was established that the best results in terms of reducing the decomposition temperature of hematite and its transition to magnetite under existing laboratory conditions correspond to the action of a vacuum at a level of 0.05 atm with 100% transition of the substance at a temperature of 1200 °C. The obtained results in terms of reducing the decomposition temperature of hematite under the influence of a vacuum are better than those predicted by calculations. Product Description popup.authors Semykin Serhii I. Anatolii H. Cherniatevych Л. С. Молчанов Koveria Andrii S. Anna А. Semykina Dudchenko Serhii O. Tetiana S. Holub Pavlo H. Prokopenko Maryna V. Reshetova Yevhenii S. Kakushkin Oleksandr Minai popup.nrat_date 2026-01-09 Close