Kinetics of CO-CO2 reaction with CaO-SiO2-FeOx melts

Barati, Mansoor; Coley, Kenneth S.

doi:10.1007/s11663-005-0017-0

Cited by 30 publications

(33 citation statements)

References 51 publications

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“…From the 1960s, the isotope exchange technique, as an effective experimental method to study the interfacial kinetics between gas and iron oxide, has been extensively used by many researchers in metallurgical field. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Recently, in order to meet the strong demand on the utilization of low grade iron ores and reduction of CO2 emission, the direct reduction of fine iron ore, as an innovative ironmaking process, has been given more attention. Therefore, the kinetics of CO2-CO reaction with the solid iron oxide became more important.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Rate of CO2^|^ndash;CO Reaction with the Solid Iron and Iron Oxide by Isotope Exchange Technique at 1273 K

Zhang

Yan

et al. 2012

ISIJ Int.

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The interfacial rate constant of CO2-CO reaction with the solid iron and iron oxide has been measured by means of the isotope exchange reaction at 1 273 K. Changing the total flowrate, the composition of CO2/CO of gas mixture and the reaction area, the effects of experimental conditions on rate constant were investigated. Varying the CO2/CO ratio in the range of 0.1 to 10, the dependence of rate constant on CO2/ CO ratio was studied. It is found that the relationship of the rate constant and CO2/CO ratio can be divided to three regions represented iron, wüstite and magnetite phase field, respectively. In three phase regions, the slopes of the linear relationship of logkc and log(CO2/CO) were about -0.48, -1.14 and -1.71, respectively. The microstructure of reaction surface of sample was also observed by SEM, with the CO2/CO ratio, the reacted surface became less smooth and showed the crystal morphology.

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Section: Introductionmentioning

confidence: 99%

Interfacial Rate of CO2^|^ndash;CO Reaction with the Solid Iron and Iron Oxide by Isotope Exchange Technique at 1273 K

Zhang

Yan

et al. 2012

ISIJ Int.

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“…[33][34][35][36][37] Several recent studies [38][39][40][41] have discussed that the reaction of iron oxide in liquid slag with CO-CO 2 gases involves the transfer of charge between the slag and the adsorbed gas species. In order to explore such reaction mechanisms, one needs to gain knowledge of the reaction kinetics and electronic properties of slag under similar conditions.…”

Section: Introductionmentioning

confidence: 99%

Electrical and electronic conductivity of CaO-SiO2-FeO x slags at various oxygen potentials: Part I. Experimental results

Barati

Coley

2006

Metall Mater Trans B

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The oxygen potential dependences of total electrical and partial electronic/ionic conductivities for 'FeO'-CaO-SiO 2 slags have been studied both experimentally and theoretically in the present work. In the first part of this two-part article, the experimental results are presented for slags with 30 wt pct 'FeO' and CaO/SiO 2 wt ratios of 0.5, 1.0, and 2.0. For each slag composition, measurements of total electrical conductivity and electronic transference were made over a range of oxygen potentials and temperatures. The results were used to calculate the partial conductivities. A maximum was achieved in total and electronic conductances as a function of equilibrium CO 2 /CO. The CO 2 /CO corresponding to the maximum was shifted to lower values with increasing slag basicity (CaO/SiO 2 ratio). The other effect of basicity was increasing total and partial conductivities, with a magnitude that depends on oxygen potential and temperature. The activation energies for ionic and electronic conductances were in similar ranges and decreased with the basicity.

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“…There are a number of papers [11][12][13][14][15][16][17][18][19][20][21][22] devoted to the study on the kinetics of the reduction of FeO and Fe 2 O 3 oxides from slags, but only few deal with the reduction of noneferrous metals from slags. Therefore, an extensive study on the kinetics of copper recovery from industrial slags was undertaken to improve effectiveness of the copper recovery in Głogów smelter.…”

Section: +mentioning

confidence: 99%

“…Barti and Coley [22] investigated the kinetics of the CO-CO 2 reaction with the CaO-SiO 2 -FeO-Fe 2 O 3 slags, with the CaO/SiO 2 ratio varying between 0.3 and 2. They found that the rate constant increases with the iron oxide content, and with the decreasing of the oxygen partial pressure.…”

Section: +mentioning

confidence: 99%

Influence Of Temperature On The Rate Of Copper Recovery From The Slag Of The Flash Direct-To-Blister Process By A Solid Carbon Reducer

Madej¹,

Kucharski²

2015

Archives of Metallurgy and Materials

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Influence of temperature on the rate of copper recovery from the slag of the flash dIrect-toblIster process by a solId carbon reducer WpłyW temperatury na szybkość odmiedzioWania żużla z procesu zaWiesinoWego za pomocą reduktora WęgloWegoThe aim of the work was to investigate the influence of temperature on the rate of copper removal from the obtained slag from the flash direct-to-blister process by means of a carbon reducer. The slag used in this work was taken from the direct-to-blister Outokumpu flash furnace at the smelter in Głogów, and graphite penetrators were used as the slag reducers. The experiment was carried out at 1573 K, 1623 K and 1673 K. It was found that the rate of the de-coppering process of the "Głogów" slag increased with the increase of temperature.Keywords:Celem pracy było określenie wpływu temperatury na kinetykę procesu odmiedziowania żużli z procesu zawiesinowego za pomocą reduktora węglowego. Do badań użyto żużel pobrany z procesu zawiesinowego realizowanego w HM "Głogów", przy czym reduktorem były penetratory grafitowe zanurzane w badanym żużlu. Badania przeprowadzono w temperaturach 1573 K, 1623 K i 1673K. Uzyskane wyniki wskazują, że szybkość procesu zwiększała się ze wzrostem temperatury ale tyko w pierwszym okresie.

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Kinetics of CO-CO2 reaction with CaO-SiO2-FeOx melts

Cited by 30 publications

References 51 publications

Interfacial Rate of CO2^|^ndash;CO Reaction with the Solid Iron and Iron Oxide by Isotope Exchange Technique at 1273 K

Interfacial Rate of CO2^|^ndash;CO Reaction with the Solid Iron and Iron Oxide by Isotope Exchange Technique at 1273 K

Electrical and electronic conductivity of CaO-SiO2-FeO x slags at various oxygen potentials: Part I. Experimental results

Influence Of Temperature On The Rate Of Copper Recovery From The Slag Of The Flash Direct-To-Blister Process By A Solid Carbon Reducer

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