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Master's Dissertation
DOI
10.11606/D.97.2010.tde-22082013-153848
Document
Author
Full name
Vinicius Franco do Nascimento
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Lorena, 2010
Supervisor
Committee
Vernilli Júnior, Fernando (President)
Nunes, Carlos Angelo
Silva, Sidiney Nascimento
Title in Portuguese
Desenvolvimento de concreto de Alta Resistência Mecânica
Keywords in Portuguese
aluminato de cálcio
Concreto refratário
siderurgia
Abstract in Portuguese
A constante busca por redução de custos e alternativas estratégicas por abastecimento de insumos refratários, tem levado as usinas siderúrgicas à buscar novos fornecedores para atender suas necessidades. Com base na necessidade da Companhia Siderúrgica Nacional (CSN), firmou-se uma parceria entre universidade e empresa, com intuito de desenvolver um novo fornecedor para um insumo refratário o qual só era fornecido por uma empresa. Foi então iniciado um trabalho de investigação das propriedades físico-químicas do material utilizado pela CSN (material de referência), utilizando-se a análise da distribuição granulométrica, composição mineralógica e propriedades mecânicas. A partir deste ponto, convidouse uma empresa genuinamente nacional, para desenvolver um novo produto, com matérias primas nacionais, que tivesse as mesmas propriedades mecânicas do material de referência. O concreto nacional foi caracterizado da mesma forma que o material de referência, em suas propriedades físico-químicas e ensaios mecânicos. Com base nos resultados foi realizado um teste em escala piloto, com aprovação do material. A empresa parceira passou a ter um novo material em sua carteira de produtos comercializado no mercado nacional e a CSN está realizando testes em escala industrial para aprovar um novo fornecedor de concreto refratário de alta resistência mecânica.
Title in English
Development of the high mechanical resistance refractory castable
Keywords in English
calcium aluminate
Refractory castable
steel plant
Abstract in English
The constant search for cost reduction and strategic alternatives for refractory raw materials supply, has led the steelplants to look for new suppliers to meet its needs. Companhia Siderurgica Nacional (CSN) has signed a partnership between universities and companies, aiming to develop a new supplier for a refractory raw material which was only supplied by one company. Then a research based on chemical-physical properties of material used by CSN (reference material) was started, using the analysis of particle size distribution, mineralogical composition and mechanical properties. From this point, a genuine national company was invited, to develop a new product, with national raw materials, which had the same mechanical properties of the reference material. The national castable was characterized in the same way as the reference material in their chemical-physical properties and mechanical tests. Based on the results a test was performed on a pilot scale, with the approval of the material. The partner company has taken on a new material in its portfolio of products marketed in the domestic market and CSN is conducting tests on an industrial scale to approve a new supplier of refractory concrete with high mechanical strength.
 
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EMD10001.pdf (3.43 Mbytes)
Publishing Date
2013-08-22
 
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