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VERSION:2.0
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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 14b
SUMMARY:Investigation of slag formation behavior between lump iron ore and limestone for utilization of lamp iron ore in oxygen blast furnace
DESCRIPTION:In an oxygen blast furnace trial using an experimental blast furnace, it was confirmed that the oxygen blast furnace could operate at a high pig iron ratio of approximately twice that of a normal blast furnace. Owing to the higher productivity of the oxygen blast furnace compared to the standard blast furnace process, the internal volume can be reduced while maintaining the same productivity. This trend can help utilization of lump iron ore, which is generally not used in current blast furnace operation due to the low strength and poor reducibility of lump ore compared to sintered iron ore.
To evaluate the possibility of utilizing lump ore in an oxygen blast furnace, slag formation behavior at the lump ore and limestone interface was investigated in this study. In order to evaluate the slag formation behavior in the cohesive zone, the softening behavior between pre-reduced lump ore and a CaO substrate in an inert atmosphere was measured under loading conditions using a softening simulator. From the results, the following results were obtained.
When the lump ore melt intrudes to the CaO substrate, the solid part of lump ore penetrates into the CaO substrate with deformation of the CaO substrate, and the greater the degree of melt intrusion, the more lump ore penetrates. The melt intrusion behavior into the CaO substrate is strongly related to the presence or absence of Ca2SiO4 phase at the initial melt formation temperature. At 1300°C or lower, the gangue composition at the outer part of the lump ore decides intrusion behavior. At 1300°C or higher, the average gangue component of the entire lump ore is the main factor to make intrusion behavior.

CLASS:PUBLIC
DTSTART:20230615T090000
DTEND:20230615T092000
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