Zobrazeno 1 - 10
of 294
pro vyhledávání: '"José Roberto de Oliveira"'
Autor:
Paulo André Pereira, Demetrius Da Rós Ruy, Jorge Alberto Soares Tenório, Cássio Santos de Carvalho, José Roberto de Oliveira, Raphael Mariano de Souza, Estéfano Aparecido Vieira
Publikováno v:
REM: International Engineering Journal, Vol 77, Iss 4 (2024)
Abstract The purpose of this study was to evaluate the cleanliness of Interstitial Free (IF) steels produced in a Ruhrstahl Heraeus (RH) vacuum degasser by determining the level of Al2O3 and Al-Ti-O inclusion types generated in three different proces
Externí odkaz:
https://doaj.org/article/35985d341fa84a099dbaa85270f5f7ae
Autor:
Daniel Mapa Clemente, Carlos Antônio da Silva, Johne Jesus Mol Peixoto, José Roberto de Oliveira, Raphael Mariano de Souza
Publikováno v:
Journal of Materials Research and Technology, Vol 24, Iss , Pp 6861-6875 (2023)
The supply chain of Sn presents social and environmental risks that could threaten the availability of cassiterite, while secondary materials, such as tin-slags, stand as an alternative source for smelters. In this context, this work investigated the
Externí odkaz:
https://doaj.org/article/367e86c4ec1c4cf7a71eb3b71ba44f00
Autor:
Sirlene Trugilho Perin Passigatti, Márcia Spelta de Oliveira, José Roberto de Oliveira, Raphael Mariano de Souza, Estéfano Aparecido Vieira
Publikováno v:
Journal of Materials Research and Technology, Vol 19, Iss , Pp 4745-4755 (2022)
In the last decades, the control of amount, size, morphology, and chemical composition of non-metallic inclusions in steel has been investigated, particularly at the stage of steel refining, where endogenous and exogenous inclusions can affect the ca
Externí odkaz:
https://doaj.org/article/c2d10f4998ec4ef58c725f08265e7a24
Autor:
Lucio Rosso Neto, Carlos Henrique Borgert, José Roberto de Oliveira, Felipe Fardin Grillo, Gabriel Valério Pereira Manfredi, Jorge Luis Coleti, Denise Crocce Romano Espinosa, Jorge Alberto Soares Tenório, David Batista Gesuino, Tiago Elias Allievi Frizon, Eduardo Junca
Publikováno v:
Materials Research, Vol 26 (2023)
The use of alternative raw materials is essential for establishing a circular economy in the mineral and ironmaking sectors. Therefore, this study investigates the potential of lime sludge as fluxing material during pelletization and proposes an alte
Externí odkaz:
https://doaj.org/article/d5e56020e1314f1cb40eb3cac71396b8
Autor:
Raphael Mariano de Souza, Vinícios Andreatta, Inamara Amanda Souza Santos, Eduardo Junca, Felipe Fardin Grillo, José Roberto de Oliveira
Publikováno v:
Journal of Materials Research and Technology, Vol 15, Iss , Pp 5307-5315 (2021)
During the process of dephosphorization, the main solid phases formed in slag are dicalcium silicate (2CaO.SiO2), tricalcium silicate (3CaO.SiO2) and tricalcium phosphate (3CaO.P2O5). The last one is the main responsible for phosphorous removal. The
Externí odkaz:
https://doaj.org/article/7b596693c1e245caa44b23374f5080d9
Autor:
Raphael Mariano de Souza, Márcia Spelta de Oliveira, José Roberto de Oliveira, Eduardo Junca, Victor Bridi Telles, Felipe Fardin Grillo
Publikováno v:
Journal of Materials Research and Technology, Vol 14, Iss , Pp 2257-2266 (2021)
Currently in steelmaking, “inclusions engineering” has occupied a relevant space in terms of improvements in processes and products. This is because these compounds, depending on the chemical nature, morphology, physical state, size and distribut
Externí odkaz:
https://doaj.org/article/28e290bbae104485b692d736d73fb18a
Autor:
Elton Volkers do Espírito Santo, Sábata Marla Reis Durães Oliveira, Caio Vaccari Silva, Felipe Fardin Grillo, José Roberto de Oliveira
Publikováno v:
REM: International Engineering Journal, Vol 74, Iss 4, Pp 443-450 (2021)
Abstract Over the last decades, the capability of a desulfurizing mixture to remove sulfur has been widely studied. The hot metal desulfurization efficiency represents the percentage of sulfur removed from the bath and the development of parameters t
Externí odkaz:
https://doaj.org/article/ad1d9c94084f41f3af8935190f3b1652
Autor:
Ludimila Melo Vieira, Heitor Cristo Clem de Oliveira, Victor Bridi Telles, Eduardo Junca, Estéfano Aparecido Vieira, José Roberto de Oliveira
Publikováno v:
Journal of Materials Research and Technology, Vol 9, Iss 6, Pp 14878-14886 (2020)
The aim of this study was to evaluate the influence of lime particle size and lime calcination level as well as slag properties (basicity, viscosity, CaO activity and density) on lime particle dissolution at temperature in the early stage of process
Externí odkaz:
https://doaj.org/article/829b3c854c4e4c67b1a1f0967a023583
Autor:
Caio Vaccari Silva, Felipe Costa Broseghini, Eduardo Junca, Felipe Fardin Grillo, José Roberto de Oliveira
Publikováno v:
Journal of Materials Research and Technology, Vol 9, Iss 5, Pp 10529-10536 (2020)
The properties of the mixtures used in hot metal dephosphorization, such as solid and liquid fraction phases, CaO and FeO activity and viscosity, are determinant for the process efficiency. The influence of these properties on hot metal dephosphoriza
Externí odkaz:
https://doaj.org/article/c091c8fd33354bfaa4ce6d32a5232fb1
Autor:
Diego Santa Rosa Coradini, Ana Rosa Rabelo de Lima, Rüdiger Deike, Victor Bridi Telles, José Roberto de Oliveira
Publikováno v:
Journal of Materials Research and Technology, Vol 9, Iss 4, Pp 7508-7517 (2020)
The objective of this study was to analyze the recycling possibility of the electric arc furnace dust (EAFD) in the form of a briquette. This paper studied the kinect behavior of the briquette's self-reduction and in contact with molten steel (steel-
Externí odkaz:
https://doaj.org/article/25a1b5b7bd234a70b76d9e9eeedae723