Off-gas Dust in an Experimental Blast Furnace: Part 1: Characterization of Flue Dust, Sludge and Shaft Fines

In blast furnace (BF) ironmaking, efforts are made to decrease coke consumption, which can be done by increasing the pulverized coal injection rate (PCR). This will cause changes in in-furnace reduction conditions, burden distribution, demands on raw material strength, etc. In order to maintain stab...

Full description

Saved in:
Bibliographic Details
Published in:ISIJ International 2010/11/15, Vol.50(11), pp.1560-1569
Main Authors: Leimalm, Ulrika, Lundgren, Maria, Ökvist, Lena Sundqvist, Björkman, Bo
Format: Article
Language:English
Subjects:
Applied sciences
Blast furnace
Coke
Exact sciences and technology
Flue dust
Metals. Metallurgy
Off-gas dust
Pellet
Powder metallurgy. Composite materials
Process Metallurgy
Processmetallurgi
Production techniques
Sinter
Sintered metals and alloys. Pseudo alloys. Cermets
Sludge
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In blast furnace (BF) ironmaking, efforts are made to decrease coke consumption, which can be done by increasing the pulverized coal injection rate (PCR). This will cause changes in in-furnace reduction conditions, burden distribution, demands on raw material strength, etc. In order to maintain stable operation, but also to obtain low amounts of material losses through the off-gas, it is important to understand fines generation and behaviour in the BF. Off-gas dust and shaft fines generated in the LKAB Experimental Blast Furnace (EBF) were sampled during operation with olivine pellets and mixtures of acid pellets and sinter as iron-bearing materials. Characterization using XRD, SEM and LOM was focused on fines from iron-bearing materials, coke and slag formers. The results showed that flue dust, mainly 0.075 mm and consisted mainly of coke particles from the shaft. Fe-containing particles, as Fe2O3 from the top of the shaft, formed the major part of flue dust fractions
ISSN:0915-1559
1347-5460
1347-5460
DOI:10.2355/isijinternational.50.1560