Blast Furnace Pellet Textures during Reduction and Correlation to Strength
スポンサーリンク
概要
- 論文の詳細を見る
The blast furnace is the most common means of producing hot metal. As the amounts of reduction agents increases, which influence in-furnace conditions such as ascending gas properties, temperature profiles and the ore-to-coke ratio, new demands are put on the iron-bearing material in terms of both reducibility and mechanical strength. To investigate the possibilities to use the Pellet Multi Press (PMP) equipment for compression strength measurements of reduced pellets and to gain a deeper understanding of the correlation between pellet texture and strength, an initial study of pellets taken from the LKAB Experimental Blast Furnace (EBF) was conducted. Furthermore, the pellet pieces generated after compression tests were characterized using light optical microscopy. In order to correlate the texture of pellet pieces to the pellet texture prior to breakage, a characterization of the chronological pellet texture development during reduction in the EBF was performed. The original pellet texture remained in the beginning of reduction and differences receded through the EBF shaft as wustite and Femet was formed. Occurrence of Femet in the pellet texture increased the compression strength, while less reduced and less sintered textures showed the reverse effect. So far, the results from compression strength tests indicate that disintegration of pellets takes place at a reaction front, at the transition between different texture types of iron oxide or at the location of a visible surface crack.
著者
-
Björkman Bo
Division of Extractive Metallurgy, Luleå University of Technology
-
Leimalm Ulrika
Division of Mineral Processing and Process Metallurgy, Luleå University of Technology
-
Forsmo Seija
LKAB R&D
-
Dahlstedt Anna
LKAB R&D
-
Ökvist Lena
Swerea MEFOS AB
関連論文
- BOS Vessel Vibration Measurement for Foam Level Detection
- BOS Vessel Vibration Measurement for Foam Level Detection
- Blast Furnace Pellet Textures during Reduction and Correlation to Strength
- Off-gas Dust in an Experimental Blast Furnace Part 1 : Characterization of Flue Dust, Sludge and Shaft Fines
- Blast Furnace Pellet Textures during Reduction and Correlation to Strength
- Off-gas Dust in an Experimental Blast Furnace Part 2 : Relation to Furnace Conditions
- Effect of Different PCI Practice on the Texture Obtained during Reduction of Iron Oxide Pellets
- Effect of Reduction Conditions on the Swelling Behaviour of Cement-bonded Briquettes
- Numerical Analysis on the Similarity between Steel Ladles and Hot-water Models Regarding Natural Convection Phenomena
- Effect of Processing Parameters on the Swelling Behaviour of Cement-bonded Briquettes
- Swelling Behaviour of Cement-bonded Briquettes-proposed Model
- Physical and Mathematical Modelling of Thermal Stratification Phenomena in Steel Ladles
- Interactions between Iron Oxides and the Additives Quartzite, Calcite and Olivine in Magnetite based Pellets
- BOS Vessel Vibration Measurement for Foam Level Detection