University of Oulu

Omran, M. , Fabritius, T. and Paananen, T. (2017) Effect of Blast Furnace Sludge (BFS) Characteristics on Suitable Recycling Process Determining. Journal of Minerals and Materials Characterization and Engineering, 5, 185-197. doi: 10.4236/jmmce.2017.54016

Effect of blast furnace sludge (BFS) characteristics on suitable recycling process determining

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Author: Omran, Mamdouh1,2; Fabritius, Timo1; Paananen, Timo3
Organizations: 1Process Metallurgy Research Group, Faculty of Technology, University of Oulu, Oulu, Finland
2Mineral Processing and Agglomeration Lab, Central Metallurgical Research and Development Institute, Cairo, Egypt
3SSAB Europe, Raahe, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.4 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2020040710682
Language: English
Published: Scientific Research Publishing, 2017
Publish Date: 2020-04-07
Description:

Abstract

The present study aims to give a detailed characterization of blast furnace sludge (BFS) by using different techniques, in order to determine the most effective recycling method to recover valuable metals from this waste. BFS is composed mainly of hematite, as its iron-bearing phase, and carbon, in addition to fractions of silicate and carbonate materials. The studied BFS shows relatively high contents of iron (Fe) (390 g.kg-1), and carbon (C) (290 g.kg-1), due to abundance of hematite and coke, while the concentration of zinc (Zn) (2.5 g.kg-1) is low. The XRD analyses indicated that, hematite is more concentrated in the fine fraction (<20 μm), while the coarser fraction (90 - 250 μm) is dominated by calcite, quartz and X-ray amorphous coke. SEM-EDX analyses confirmed that particles rich in iron and zinc were detected in the fine fraction (<20 μm) of the sludge. Due to high Fe and C content in BFS, it can be utilized as self-reducing material and briquetting represent a potential method for recycling of blast furnace sludge.

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Series: Journal of minerals and materials characterization and engineering
ISSN: 2327-4077
ISSN-E: 2327-4085
ISSN-L: 2327-4077
Volume: 5
Issue: 4
Pages: 185 - 197
DOI: 10.4236/jmmce.2017.54016
OADOI: https://oadoi.org/10.4236/jmmce.2017.54016
Type of Publication: A1 Journal article – refereed
Field of Science: 218 Environmental engineering
Subjects:
Copyright information: © 2017 by authors andScientific Research Publishing Inc.This work is licensed under the CreativeCommons Attribution InternationalLicense (CC BY 4.0).
  https://creativecommons.org/licenses/by/4.0/