2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 3: Takano Intl. Symp. / Metals & Alloys Processing
| Editors: | Kongoli F, Noldin JH, Mourao MB, Tschiptschin AP, D'Abreu JC |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 550 pages |
| ISBN: | 978-1-987820-26-3 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Simulation of the Shaft Furnace Using a Partial Charge of Self-Reducing Pellets
Elisa Pinto da Rocha1; Jose Adilson de Castro2; Marcos de Campos2; Vagner Silva Guilherme2;1, Volta Redonda, Brazil; 2UFF - FEDERAL FLUMINENSE UNIVERSITY, Volta Redonda, Brazil;
Type of Paper: Regular
Id Paper: 188
Topic: 3
Abstract:
Currently, the process of reduction of iron ore in blast furnaces has presented some disadvantages which are unwanted by environmental agencies. Some solutions for optimization of the process would be: using reducing sources with less carbon than coal; reducing raw materials and increasing the consumption of scraps and to reduce the energy demand of the reactor. A suitable proposal is the increasing for direct reduction processes, such as Midrex and Hyl. Aiming to solve these problems, the present work consisted to analyze the energetic profile of the shaft reactor and to suggest any changes in the feed charge, using computational simulation. A part of the feed charge used in reactor of type Midrex shaft was replaced by self-reducing pellets composed by BOF dust, pellet feed and biomass of elephant grass.<br />The thermogravimetric runs performed in TGA-DSC allowed estimating the kinetic constants for the different reactions for mixtures containing 15, 20 and 30% of carbon. At 1100°C it was found the biggest constant for step FeO Fe, 0,0258s-1. Simulation results showed a good agreement about the energetic reduction of the Midrex furnace and contributed to comprehend better the phenomena occur in shaft furnace suiting it to partial substitution of the current charge by self-reducing pellets.
Keywords:
Carbon; Furnace; Pellets; Recycling;References:
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