Analysis of the Aluminothermic Reaction Process

Wang, Shuang Xi; Liang, Kai Ming; Zhang, Xiao Hui; Li, Hai Bin; Gu, Shou Ren

doi:10.4028/www.scientific.net/kem.224-226.745

Cited by 6 publications

(5 citation statements)

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“…(1) produces gas!). In the reaction between hematite and aluminium according to reaction (2), no weight loss is caused. So, if this exothermic reaction takes place, it could only be seen from the DTA curve.…”

Section: Resultsmentioning

confidence: 99%

“…But this does not mean that the reduction degree is lower and not completed at the lower TGL Max , since the TGL is only caused by the carbothermic reduction reaction. For example in sample SHG 10-2 with 10 percent aluminium, this amount of aluminium is enough for removing about 40% of reducible oxygen of iron oxides through reaction (2) in which no weight loss occurs. Therefore, although the TGL Max is only 76.91 % in sample SHG 10-2, almost all the iron in the final product is in metallic form, as will also be shown and explained in more detail later, based on the results of XRD examinations.…”

Section: Resultsmentioning

confidence: 99%

“…The reduction of iron oxides, using different materials as reductant, has been studied during several past decades [1][2][3]. Among the reductants, carbonaceous materials have been used by many researchers and carbothermic reduction of iron oxides has extensively been investigated [1, [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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A Study of the Effect of Aluminium on the Mechanochemical Reduction of Hematite by Graphite

Khaki

Panjehpour

Kashiwaya

et al. 2004

steel research international

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The effect of addition of small amounts of aluminium on mechano‐chemical reduction of hematite by graphite was studied. Various amounts of aluminium (0 to 10%) were added to a hematite‐graphite mixture, in which C/O ratio was 1:1. The hematite‐graphite‐aluminium mixtures were then subjected to ball milling followed by heating up reduction. The heating up reduction was carried out in Ar atmosphere, using TG‐DTA device. In TG‐DTA experiments, samples were heated by a constant heating rate of 10 °C/min from room temperature up to 1100 °C and maintained for 30 minutes at this temperature. To clarify the reactions which took place during milling and heating up reduction, the samples were subjected to XRD examinations. It was found that the heat generated during exothermic reaction of aluminothermic reduction of hematite promoted the endothermic reaction of carbothermic reduction. In the course of heating up reduction, the carbothermic reaction occurred just after aluminothermic reaction. Increasing of aluminum content from 0 to 10% in 2 hours ball milled samples decreased the temperature of carbothermic reaction from 1020 °C to about 860 °C. The further ball milling of the samples up to 5 and 10 hours, for the samples containing 10 and 5% aluminium respectively, caused the decrease of the temperature of aluminothermic and carbothermic reactions to around the melting point of aluminium.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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A Study of the Effect of Aluminium on the Mechanochemical Reduction of Hematite by Graphite

Khaki

Panjehpour

Kashiwaya

et al. 2004

steel research international

View full text Add to dashboard Cite

show abstract

“…The reduction of iron oxides, using different materials as reductant, has been the subject of many studies in the past decades. [1][2][3] Among the reductants, carbonaceous materials have been used by many researchers and carbothermic reduction of iron oxides has extensively been investigated. 1,[4][5][6][7] Many attempts have been conducted also to develop new iron making processes, based on direct reduction of iron oxides with carbon bearing materials.…”

Section: Introductionmentioning

confidence: 99%

Carbothermic reduction of mechanically activated hematite–graphite–copper mixture

Karbasi¹,

Saidi²,

Tahmasebi³

2009

Ironmaking & Steelmaking

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In this research carbothermic reduction of mechanically activated hematite-graphite-copper mixture was investigated. The effects of Copper and milling time on reduction behaviour of mixtures were studied by differential thermal analysis and thermogravimetry experiments. SEM and XRD techniques were also used to evaluate microstructure and phase constituent of the samples. By mechanical activation of the hematite-graphite-copper mixture the reduction temperature could be decreased .200uC. The presence of copper in mixture has an additional effect on the initiation of the Boudouard reaction at lower temperatures. Thus the gaseous reduction of Hematite with CO was started at a temperature as low as 790uC when Cu was used in the activated mixture.

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“…Analisando os resultados de diversos trabalhos em sistemas termite, como o Fe 2 O 3 /Al vastamente investigado e outros sistemas termites menos frequentes, conclui-se que existem vários mecanismos de reação propostos para estes sistemas termites.Como exemplo, a adoção do sistema termite Fe 2 O 3 /Al como ponto de referência, pode-se perceber a existência de vários mecanismos de reação propostos para este sistema, que se diferenciam basicamente nos produtos obtidos nas etapas intermediarias da reação termite.Certamente, cada reação termite tem as suas próprias condicionantes experimentais que vão impor o mecanismo da reação, a cinética, a termodinâmica do sistema, etc. Os trabalhos desenvolvidos porMei et al (1999),Wang et al (2002),Fan et al (2006);Durães et al (2007) eDurães (2007) são um claro exemplo do exposto anteriormente.…”

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Caracterização e aproveitamento dos rejeitos oriundos de processos hidrometalúrgicos do níquel e cobalto com um enfoque geoambiental

Sosa¹

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____________________________________________________________LUÍS FERNANDO MARTINS RIBEIRO, DSc. (UnB) (ORIENTADOR) ____________________________________________________________ ANDRÉ LUIS BRASIL CAVALCANTE, DSc. (UnB) (EXAMINADOR INTERNO) ____________________________________________________________ HERNÁN MARTÍNEZ CARVAJAL, DSc. (UnB) (EXAMINADOR INTERNO) _____________________________________________________________ MARIA JOSÉ ARAÚJO SALES, DSc. (IQ/UnB) (EXAMINADOR EXTERNO) _____________________________________________________________ WILSON CONCIANNI, DSc. (IFB) (EXAMINADOR EXTERNO) DATA: BRASÍLIA-DF, 05 DE SETEMBRO DE 2016. iii FICHA CATALOGRÁFICA SOSA, EVELIN RODRÍGUEZ Caracterização e aproveitamento dos rejeitos oriundos de processos hidrometalúrgicos do níquel e cobalto com um enfoque geoambiental. [Distrito Federal] 2016. xx, 170p., 297 mm (ENC/FT/UnB, Doutor, Geotecnia, 2016

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Analysis of the Aluminothermic Reaction Process

Cited by 6 publications

References 0 publications

A Study of the Effect of Aluminium on the Mechanochemical Reduction of Hematite by Graphite

A Study of the Effect of Aluminium on the Mechanochemical Reduction of Hematite by Graphite

Carbothermic reduction of mechanically activated hematite–graphite–copper mixture

Caracterização e aproveitamento dos rejeitos oriundos de processos hidrometalúrgicos do níquel e cobalto com um enfoque geoambiental

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