Carbothermic reduction kinetics of nanocrystallite Fe2O3/NiO composites for the production of Fe/Ni alloy

2008 ◽  
Vol 463 (1-2) ◽  
pp. 585-590 ◽  
Author(s):  
K.S. Abdel-Halim ◽  
M.H. Khedr ◽  
M.I. Nasr ◽  
M.Sh. Abdel-wahab
Keyword(s):  
Carbothermic Reduction ◽  
Reduction Kinetics ◽  
Ni Alloy ◽  
Kinetics Of

Non-isothermal carbothermic reduction kinetics of mechanically activated ilmenite containing self-reducing mixtures

2017 ◽  
Vol 131 (3) ◽  
pp. 2457-2465 ◽  
Author(s):  
M. H. El-Sadek ◽  
H. M. Ahmed ◽  
K. El-Barawy ◽  
M. B. Morsi ◽  
H. El-Didamony ◽  
...  
Keyword(s):  
Carbothermic Reduction ◽  
Reduction Kinetics ◽  
Kinetics Of

Kinetics of Carbothermic Reduction of Ilmenite

2016 ◽  
Vol 852 ◽  
pp. 315-322 ◽  
Author(s):  
Min Chen ◽  
Xuan Xiao ◽  
Xue Feng Zhang
Keyword(s):  
Activation Energy ◽  
Kinetic Parameters ◽  
Carbothermic Reduction ◽  
Reduction Process ◽  
Phase Evolution ◽  
Reduction Kinetics ◽  
Isokinetic Relationship ◽  
Exponential Factor ◽  
Morphology Change ◽  
Kinetics Of

The reduction kinetics of ilmenite was investigated. Phase evolution during the reduction process was identified by XRD and morphology change was observed using SEM. Kinetic parameters of the activation energy and pre-exponential factor were determined by Kissinger-Akahira-Sunose (KAS) method and Coast-Redfern method&artificial isokinetic relationship (IKP) respectively. Results showed that when the reaction of titanium suboxides makes a growing contribution, the conversion dependence of activation energy has an ascending trend. When the conversion exceeded 0.7, the reactants almost consumed, and the process was controlled by diffusion.

Study on vacuum carbothermic reduction kinetics of hemimorphite catalyzed by calcium fluoride

Vacuum ◽  
2015 ◽  
Vol 119 ◽  
pp. 163-167 ◽  
Author(s):  
LiZhi Xiong ◽  
Zeqiang He ◽  
Zhixiong Liu ◽  
Zoulan Yin
Keyword(s):  
Calcium Fluoride ◽  
Carbothermic Reduction ◽  
Reduction Kinetics ◽  
Kinetics Of

scholarly journals Carbothermic reduction kinetics of ilmenite concentrates catalyzed by sodium silicate and microwave-absorbing characteristics of reductive products

2013 ◽  
Vol 19 (3) ◽  
pp. 423-433 ◽  
Author(s):  
Wei Li ◽  
Jinhui Peng ◽  
Shenghui Guo ◽  
Libo Zhang ◽  
Guo Chen ◽  
...  
Keyword(s):  
Sodium Silicate ◽  
Carbothermic Reduction ◽  
Reduction Rate ◽  
Reduction Reaction ◽  
Great Change ◽  
Microwave Cavity ◽  
Reduction Kinetics ◽  
Microwave Absorbing ◽  
Reaction Activation Energy ◽  
Kinetics Of

Carbothermic reduction kinetics of ilmenite concentrates catalyzed by sodium silicate was investigated; the reduction degree of ilmenite concentrates reduction reaction was deduced as. R = (4(16y+56x)(?W? - fA-PW))/(7(16y + 56x + 112)). Results show that reaction activation energy of initial stage and later stage is 36.45 kJ/mol and 135.14kJ/mol, respectively. There is a great change for reduction rate at temperatures of 1100 ?C and 1150 ?C; the catalysis effect and great change of reduction rate were evaluated by TG and DSC curves of sodium silicate. Microwave-absorbing characteristics of reduction products were measured by the method of microwave cavity perturbation. It is found that microwave absorbing characteristics of reduction products obtained at temperatures of 900 ?C, 1100 ?C and 1150 ?C have great changes, combined XRD characterization, explaining the formation and accumulation of reduction product Fe, and great changes of microwave absorbing characteristics were due to the decrease of the content of ilmenite concentrates.

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