Fe-Si droplets associated with graphite on blast furnace coke

• Published in: International journal of minerals, metallurgy and materials Vol. 19; no. 6; pp. 478 - 482
• Main Authors: Gornostayev, Stanislav S., Fabritius, Timo M. J., Kerkkonen, Olavi, Härkki, Jouko J.
• Format: Journal Article
• Language: English
• Published: Springer Berlin Heidelberg University of Science and Technology Beijing 01.06.2012; Springer Nature B.V; Laboratory of Process Metallurgy,University of Oulu,Oulu 90014,Finland%Ruukki Metals Oy,Raahe 92102,Finland
• Subjects: Blast furnaces; Cast iron; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Coke; Coke fired furnaces; Composites; Corrosion and Coatings; Crystals; Droplets; Glass; Graphite; Iron; Iron silicide; Materials Science; Metallic Materials; Natural Materials; Penetration; Silicon; Surfaces and Interfaces; Texture; Thin Films; Tribology; Tuyeres; 冷却条件; 板状晶体; 液滴; 渗透度; 焦炭; 相互作用; 石墨; 高炉; iron; graphite; metallurgical coke; blast furnaces
• ISSN: 1674-4799; 1869-103X
• DOI: 10.1007/s12613-012-0583-5

Fe-Si droplets on the surface of blast furnace （BF） coke from 25 to 50 cm at the tuyere level are mostly composed of Fe3Si, which has various shapes （round, elongated, and irregular） and penetration degrees into the BF coke matrix. The shapes and penetration degrees may depend on the saturation of molten iron by silicon during interaction with the coke matrix. The droplets are covered by a tiny shell of carbon. Graphite observed inside the droplets can be divided into two categories： well-formed tabular crystals with relatively large size and flakes with structures similar as those in cast iron. The textures of the droplets reflect composition, interaction with the coke matrix, and cooling conditions.