Blast Furnace Hearth Lining: Post Mortem Analysis
| Autor: | Fernando Vernilli Junior, Elton Silva Neves, Sidiney Nascimento Silva, Bruno Vidal de Almeida |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
ALTOS FORNOS
Blast furnace Materials science Hearth Scanning electron microscope 020209 energy chemistry.chemical_element 02 engineering and technology Carbon refractory 020501 mining & metallurgy Corrosion Impurity 0202 electrical engineering electronic engineering information engineering General Materials Science Materials of engineering and construction. Mechanics of materials Mechanical Engineering Metallurgy Slag Coke Blast furnace hearth Condensed Matter Physics 0205 materials engineering chemistry Mechanics of Materials visual_art visual_art.visual_art_medium TA401-492 Carbon |
| Zdroj: | Materials Research, Vol 20, Iss 3, Pp 814-818 (2017) Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Materials Research v.20 n.3 2017 Materials research (São Carlos. Online) Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL Materials Research, Volume: 20, Issue: 3, Pages: 814-818, Published: 15 MAY 2017 |
| ISSN: | 1516-1439 |
| Popis: | The main refractory lining of blast furnace hearth is composed by carbon blocks that operates in continuous contact with hot gases, liquid slag and hot metal, in temperatures above 1550 oC for 24 hours a day. To fully understand the wear mechanism that acts in this refractory layer system it was performed a Post Mortem study during the last partial repair of this furnace. The samples were collected from different parts of the hearth lining and characterized using the following techniques: Bulk Density and Apparent Porosity, X-Ray Fluorescence, X-ray Diffraction, Scanning Electron Microscopy with Energy-dispersive X-Ray Spectroscopy. The results showed that the carbon blocks located at the opposite side of the blast furnace tap hole kept its main physicochemical characteristics preserved even after the production of 20x106 ton of hot metal. However, the carbon blocks around the Tap Hole showed infiltration by hot metal and slag and it presents a severe deposition of zinc and sulfur over its carbon flakes. The presence of these elements is undesired because it reduces the physic-chemical stability of this refractory system. This deposition found in the carbon refractory is associated with impurities present in the both coke and the sinter feed used in this blast furnace in the last few years. |
| Databáze: | OpenAIRE |
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