Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/75173
Title: ИЗУЧЕНИЕ ПРОЦЕССА ОКИСЛЕНИЯ В ЖЕЛЕЗОРУДНЫХ МАТЕРИАЛАХ ПРИ НИЗКИХ ТЕМПЕРАТУРАХ
Other Titles: Oxidation process in iron ore materials at low temperatures
Authors: Melamud, S. G.
Yur’ev, B. P.
Gol’tsev, V. A.
Меламуд, С. Г.
Юрьев, Б. П.
Гольцев, В. А.
Issue Date: 2017
Publisher: National University of Science and Technology MISIS
Национальный исследовательский технологический университет МИСиС
Citation: Меламуд С. Г. ИЗУЧЕНИЕ ПРОЦЕССА ОКИСЛЕНИЯ В ЖЕЛЕЗОРУДНЫХ МАТЕРИАЛАХ ПРИ НИЗКИХ ТЕМПЕРАТУРАХ / С. Г. Меламуд, Б. П. Юрьев, В. А. Гольцев // Известия высших учебных заведений. Черная металлургия. — 2017. — Т. 60. — №. 6. — С. 474-480.
Abstract: Using methods of physico-chemical analysis (differentially– thermal and mineralogical) helped to study the oxidation process of magnetite (titanium magnetite) on samples from Olhovsk magnetite and Kachkanar titanium magnetite concentrates at low temperatures (200 – 400 °C). Kinetic curves for the studied materials were obtained at different temperatures; they are typical for topochemical processes. Meanings of specific speeds of oxidation of magnetite various size at different temperatures were calculated and sizes of apparent energy of activation of the process were defined. The influence of partial pressure on kinetics of oxidation in gas phase was studied to expose the limiting point of the process of oxidation of magnetite and titanium magnetite. The order of oxidation reaction on oxygen at definite temperatures and the oxidation degree was calculated using graphical methods. The influence of titanium inclusions in magnetite on kinetics of phase change of magnetite–hematite was examined at the temperature interval of 200 – 400 °C, it happens in mixed operational parameters. Then the process comes to diffusive operational parameters. Kinetic principles and the character of oxidation of the studied materials in nonisothermical conditions were defined at different speeds of heating. These results are of some interest and can be used to optimize the low temperature oxidation regimes of iron ore materials on a conveyor roasting machine. © 2017, National University of Science and Technology MISIS. All rights reserved.
Keywords: DEGREE OF OXIDATION
DIFFUSION
ENERGY OF ACTIVATION
IRON ORE MATERIALS
KINETICS
LOW TEMPERATURE OXIDATION
LOW TEMPERATURES
MAGNETITE
MECHANISM
TITANIUM MAGNETITE
URI: http://hdl.handle.net/10995/75173
Access: info:eu-repo/semantics/openAccess
RSCI ID: 29410943
SCOPUS ID: 85026384071
PURE ID: 1973043
ISSN: 0368-0797
DOI: 10.17073/0368-0797-2017-6-474-480
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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