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VERSION:2.0
METHOD:PUBLISH
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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 02
SUMMARY:On the assimilation properties of nuclei particle in iron ore sintering
DESCRIPTION:Suitable quality of sintered ore is a crucial factor for stable blast furnace process. However, it is difficult to predict various properties of sintered ore by identifying characteristics of blending ores such as ore size and chemical composition due to its complex reaction mechanism. Sintered ore is generated by assimilation process of granule particles composed of adhering fines and nuclei ores and its reactivity is changed by physical and chemical properties of iron ores. Especially, assimilation between coarse ores and fines is able to influence the sinter bonding strength. Therefore, this study aims to clarify influencing factors on assimilation process and identify correlation between sinter bonding strength and characteristics of coarse ore. To simulate sintering, pseudo particles were granulated with coarse ore (1-3 mm) and adhering fines which form primary melt and then sintered at 1623 K. The simplified Tumbler Index test (TI) was conducted to assess bonding strength of sintered ore particles. Iron ore Reactivity Indices (IRI) were obtained by evaluating TI values of 11 kinds of iron ore brands, respectively. As a result, physico-chemical properties of coarse ores such as gangue, LOI (Loss On Ignition) content and melting point influenced distinct assimilation properties. Coarse ore brand that undergoes intense assimilation reaction has higher IRI value and this phenomenon causes improving sinter bonding strength. Considering the association between Iron Blending ore Reactivity Index (IBRI) and quality of sintered ore generated in the sinter plant, we figured out that higher IBRI increases Shatter Index (SI) of sintered ore. This result shows that not only the comparison of the degree of iron ore assimilation reaction is able to rank each iron ore brands, but also it could predict quality of sintered ore dependent on IBRI.
CLASS:PUBLIC
DTSTART:20230614T124000
DTEND:20230614T130000
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