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Estatística
Título: THE REDUCTION KINETICS KINETICS OF SELF-REDUCING BRIQUETTES
Autor: JOSE HENRIQUE NOLDIN JUNIOR
Colaborador(es): JOSE CARLOS D ABREU - Orientador
Catalogação: 26/JUN/2003 Língua(s): PORTUGUESE - BRAZIL
Tipo: TEXT Subtipo: THESIS
Notas: [pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio.
[en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio.
Referência(s): [pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=3667&idi=1
[en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=3667&idi=2
DOI: https://doi.org/10.17771/PUCRio.acad.3667
Resumo:
The present work, analyzes the impact of the key variables, temperature, reduction atmosphere and composition of the ferrous and carbonaceous materials, on the kinetics of self- reducing briquettes, for two types of samples, over the temperature range 1000 - 1300 Celsius Degree. A brief history of the ironmaking science is presented, covering the most relevant features of the main self-reduction processes and a survey of the main published researches on the same subject relating to thermodynamic and kinetic aspects. The experimental procedure, details of the apparatus used, the experimental parameters, characterization of the samples and the results are described. Based on the results obtained, the kinetic parameters were evaluated determining the apparent activation energy (E0) as 177,10 kJ/mol and the pre-exponential frequency factor of the Arrehnius equation (ê0) as 0,97x10-3 s-1. It is observed that, increasing the temperature, decreasing the inert gas flow (N2) and using CO atmosphere, improves significantly the kinetics of reduction of self-reducing briquettes, raising the rate of iron oxide reduction. The results confirm that the Boudouard reaction is the rate limiting step of the overall reaction, up to 1200 Celsius Degree, when a mixed control starts, where the influence of the iron oxides reduction shall be also considered. The significance of this experimental results and observations to the design and the development of an innovative self-reduction smelting process are highlighted.
Descrição: Arquivo:   
COVER, ACKNOWLEDGEMENTS, RESUMO, ABSTRACT, SUMMARY AND LISTS PDF    
CHAPTER 1 PDF    
CHAPTER 2 PDF    
CHAPTER 3 PDF    
CHAPTER 4 PDF    
CHAPTER 5 PDF    
CHAPTER 6 PDF    
CHAPTER 7 PDF    
REFERENCES PDF    
APPENDICES PDF