Mathematical Model of Iron Reduction with Aluminothermic Method

2014 ◽  
Vol 1040 ◽  
pp. 484-488 ◽  
Author(s):  
Dmitrii A. Potianikhin ◽  
Oleg N. Komarov
Keyword(s):  
Iron Reduction ◽  
Steel Production ◽  
Reduction Reaction ◽  
Oxidation Reduction ◽  
Aluminum Iron ◽  
Charge Mixture ◽  
Initial Charge ◽  
Oxidation Reduction Reaction ◽  
Dispersed Aluminum ◽  
Exothermic Oxidation

Utilization of industrial waste in foundry engineering is one of approaches for decrease of production cost price. This technological process may be based on exothermic oxidation-reduction reaction with the resulting formation of iron from dross. Initial charge mixture consists of dispersed aluminum, iron dross and admixtures. This paper is concerned with mathematical modeling of thermite steel production. Presented model takes into account thermal, mechanical and kinetic processes occurring in aluminothermic method of steel melt production.

Preparation of Ultrafine Cobalt Ferrite Particles by Solution SHS Method

2011 ◽  
Vol 284-286 ◽  
pp. 645-648
Author(s):  
Xi En Li ◽  
Xu Hua Zhu
Keyword(s):  
Room Temperature ◽  
Cobalt Ferrite ◽  
Reduction Reaction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oxidation Reduction ◽  
Transmission Electron ◽  
Oxidation Reduction Reaction ◽  
Exothermic Oxidation ◽  
Shs Method

Nanosized CoFe2O4powders of 12nm particle size were directly prepared by solution SHS method at room temperature. The overall process involves three steps: formation of homogeneous sol; formatiom of dried gel; and combustion of the dried gel. Experiments revealed that CoFe2O4dried gel derived from citrate and nitrate sol exhibited self-propagation combustion(SHS) at room temperature once it was ignited in air. After self-propagating combustion, the gel directly transforms into nanosized CoFe2O4particles. The self-propagating combustion was considered as a heat-induced exothermic oxidation-reduction reaction between nitrate ions and carboxyl group. Differential thermal analysis-thermogravimetry (DTA-TG) was used to study the decomposition of the precursor. The structure of the nanosized CoFe2O4powders was characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM).

Pseudomonas aeruginosa transition from environmental generalist to human pathogen

2021 ◽  
Vol 13 (1) ◽  
pp. 11
Author(s):  
Gabriela Vasco ◽  
Gabriel Trueba
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Human Body ◽  
Biofilm Formation ◽  
Reduction Reaction ◽  
Human Pathogen ◽  
Opportunistic Bacteria ◽  
Oxidation Reduction ◽  
Mammalian Tissues ◽  
Oxidation Reduction Reaction ◽  
Source Sink

Opportunistic bacteria Pseudomonas aeruginosa is one of the major concerns as an etiological agent of nosocomial infections in humans. Many virulence factors used to colonize the human body are the same as those used by P. aeruginosa to thrive in the environment such as membrane transport, biofilm formation, oxidation/reduction reaction, among others. P. aeruginosa origin is mainly from the environment, the adaptation to mammalian tissues may follow a source-sink evolution model; the environment is the source of many lineages, some of them capable of adaptation to the human body. Some lineages may adapt to humans and go through reductive evolution in which some genes are lost.  The understanding of this process may be critical to implement better methods to control outbreaks in hospitals.

The Oxidation-reduction Reaction of Quinoxaline-2- and 1,5-Naphthyridine-2-aldehyde N-Oxides and Their Hydrates

Heterocycles ◽  
1978 ◽  
Vol 9 (10) ◽  
pp. 1514
Author(s):  
A. S. Elina ◽  
I. S. Musatova ◽  
R. M. Titkova ◽  
E. A. Trifonova
Keyword(s):  
Reduction Reaction ◽  
Oxidation Reduction ◽  
Oxidation Reduction Reaction

The acid-catalyzed oxido-reduction of spiroketals. Evidence for stereoelectronic control in hydride transfer to cyclic oxenium ions

1981 ◽  
Vol 59 (18) ◽  
pp. 2787-2802 ◽  
Author(s):  
Pierre Deslongchamps ◽  
Daryl D. Rowan ◽  
Normand Pothier
Keyword(s):  
Hydride Transfer ◽  
Reduction Reaction ◽  
Sodium Cyanoborohydride ◽  
Oxidation Reduction ◽  
Oxidation Reduction Reaction ◽  
Stereoelectronic Control ◽  
Acidic Conditions ◽  
Acid Catalyzed ◽  
Ether Ketone ◽  
Catalyzed Oxidation

Tricyclic spiroketal 1 undergoes an acid-catalyzed oxidation–reduction reaction which yields equatorial bicyclic ether aldehyde 5 specifically. Similarly, spiroketals 2, 3, and 4 give equatorial bicyclic ether ketone 12. These results are interpreted by invoking an internal hydride transfer from an alcohol function to a cyclic oxenium ion which takes place with stereoelectronic control. The reduction of tricyclic ketals 1 and 22 with sodium cyanoborohydride under acidic conditions is also reported.

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