Obtención simultánea de ferroaleación multicomponente y escoria a partir de arenas negras, para el desarrollo de consumibles de soldadura por arco eléctrico

Puchol, Rafael Quintana; Perdomo-González, Lorenzo; Cruz-Crespo, Amado; Gómez-Rodríguez, L.; García-Sánchez, L. L.; Cerpa-Naranjo, A.; Cores-Sánchez, A.

doi:10.3989/revmetalm.2004.v40.i4.277

Cited by 3 publications

(8 citation statements)

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“…All of the reaction products described by the reactions given by Equations (1), (2), (4), (5), or (7)-(9) were found in the slags obtained from the NiO reduction process studied in this work.…”

Section: Thermodynamic Consideration For the Al-nio-mg Systemmentioning

confidence: 79%

“…However, the diagram drawn by the software was preliminary as the kinetic conditions change continuously during the reaction. Reactions (5) and (6) must be produced at the aluminum/slag interface, forming a protective layer of aluminum and magnesium oxides in the molten bath.…”

Section: Thermodynamic Consideration For the Al-nio-mg Systemmentioning

confidence: 99%

“…The formation of MgO, a phase present in the slag produced in this work for aluminum alloys with initial Mg concentrations above 2 wt-%, proceeded from the following reaction: Reactions (5) and (6) must be produced at the aluminum/slag interface, forming a protective layer of aluminum and magnesium oxides in the molten bath.…”

Section: Thermodynamic Consideration For the Al-nio-mg Systemmentioning

confidence: 99%

“…In this sense, the first applications of the aluminothermic reduction of oxides were in the preparation of molten iron streams for filling the enclosures of exposed surfaces, where the slag rich in Al 2 O 3 could be separated easily because of its lower density relative to that of iron [5]. Currently, an aluminothermic reduction is used for the preparation of aluminum master alloys, such as Al-Sr-Mg, Al-Ce-Mg, Al-Zn, Al-Mn, Al-Zr, Al-Mg-Fe-Cr, Al-Li, and so on.…”

Section: Introductionmentioning

confidence: 99%

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A Kinetic Study on the Preparation of AlNi Alloys by Aluminothermic Reduction of NiO Powders

Beltran¹,

Valdés²,

Torres³

et al. 2018

Metals

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In this work, the experimental results obtained during the preparation of Al-Ni and Al-Ni-Mg alloys using the aluminothermic reduction of NiO by submerged powder injection, assisted with mechanical agitation are presented and discussed. The analyzed variables were melt temperature, agitation speed, and initial magnesium concentration in the molten alloy. For some of the experiments performed, it was found that the Ni concentration increased from 0 to about 3 wt-% after 90 min of treatment at constant temperature and constant agitation speed. In order to determine the values of the kinetic parameters of interest, such as the activation energy and the rate constants, the values of the results obtained were fitted to the kinetic formulae available. Moreover, the kinetics of the reaction were found to be governed by the diffusion of Al and Mg to the NiO boundary layer, where MgAl2O4 or Al2O3 were formed as the main reaction products. Finally, from a thermodynamic study of the system, the main reactions that took place are explained.

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Section: Thermodynamic Consideration For the Al-nio-mg Systemmentioning

confidence: 79%

Section: Thermodynamic Consideration For the Al-nio-mg Systemmentioning

confidence: 99%

Section: Thermodynamic Consideration For the Al-nio-mg Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Kinetic Study on the Preparation of AlNi Alloys by Aluminothermic Reduction of NiO Powders

Beltran¹,

Valdés²,

Torres³

et al. 2018

Metals

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“…1 Currently, aluminothermic reduction is used to obtain aluminium master alloys such as Al-SrMg, Al-Ce-Mg, Al-Zn, Al-Mn, Al-Zr, Al-Mg-Fe-Cr, Al-Li, Al-Ni, etc. [2][3][4][5][6][7][8][9][10] On the other hand, copper is broadly known to represent one of the main alloying elements in aluminium alloys, and its consumption in the automotive and aerospace industries has consequently increased in recent years.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Al–Cu alloys by aluminothermic reduction of CuO using submerged powder injection assisted with mechanical agitation: thermodynamic approach and kinetic measurements

Díaz

Valdés

Palacios

2014

International Journal of Cast Metals Research

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This work details the result of experiments conducted at the laboratory scale to prepare Al-Cu alloys using aluminothermic reduction of CuO by submerged powder injection assisted with mechanical agitation. The analysed variables were melt temperature, particle size and initial magnesium concentration in the molten alloy. In this study, the copper content was increased from 0 to about 5 wt-% after 180 min of treatment at constant temperature in some of the experiments performed. The values of the results obtained were fitted to the kinetic formulae to determine the values of the kinetic parameters of interest, including the activation energy and the rate constants. Moreover, the kinetics of the reaction was found to be governed by the diffusion of Al and Mg to the CuO boundary layer, where MgAl 2 O 4 or Al 2 O 3 were formed as the main reaction products. From a thermodynamic study on the system, the main reactions taking place are explained.

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Fundente para Recargue por Soldadura con Arco Sumergido a Partir de Ferrocromo-manganeso y Escoria de la Reducción Simultánea de Cromita y Pirolusita

et al. 2019

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Resumen Se aborda la obtención de un fundente para recargue duro por Soldadura con Arco Sumergido (SAW), empleando ferrocromo-manganeso y escoria obtenidos de la reducción carbotérmica simultánea de cromita y pirolusita. El ferrocromo-manganeso y la escoria fueron obtenidos, concibiendo que ambos productos satisfagan los requisitos de los componentes (sistema de aleación y matriz) de un fundente aglomerado para el recargue. El proceso de fusión-reducción para la obtención de la aleación y la escoria fue realizado en horno de arco eléctrico de corriente continua. El vertido fue realizado en agua para facilitar la separación y molienda de los productos de colada. Fue elaborado un fundente experimental, empleando la aleación y escoria obtenida. Fueron obtenidos depósitos por SAW, los cuales fueron caracterizados en cuanto a: composición química, microestructura y dureza. Se concluyó que el fundente obtenido a partir de ferrocromo-manganeso y escoria de la reducción carbotérmica simultánea de cromita y pirolusita, permite depositar un metal apropiado para el trabajo en condiciones de abrasión, que se caracteriza por significativos contenidos de carbono y cromo y una microestructura predominantemente martensítica, con dureza de 63 HRc.

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Obtención simultánea de ferroaleación multicomponente y escoria a partir de arenas negras, para el desarrollo de consumibles de soldadura por arco eléctrico

Cited by 3 publications

References 0 publications

A Kinetic Study on the Preparation of AlNi Alloys by Aluminothermic Reduction of NiO Powders

A Kinetic Study on the Preparation of AlNi Alloys by Aluminothermic Reduction of NiO Powders

Preparation of Al–Cu alloys by aluminothermic reduction of CuO using submerged powder injection assisted with mechanical agitation: thermodynamic approach and kinetic measurements

Fundente para Recargue por Soldadura con Arco Sumergido a Partir de Ferrocromo-manganeso y Escoria de la Reducción Simultánea de Cromita y Pirolusita

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