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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:The effect of gangue minerals distribution on the strength of granulates for sintering process
DESCRIPTION:In Japan, ironmaking using blast furnaces is the mainstream, and sintered ore is mainly used as an iron source. Sintered ore is made by sintering the granulated powdery iron ore. The strength of granulates in the sintering process is one of the important factors to improve the gas permeability of sinter bed. In high permeability, productivity of the sintering process increases.  In recent years, high-grade iron ore has been depleting, and the usage of low-grade iron ore containing a large amount of gangue mineral such as silica and alumina is increasing. It is expected that the increased gangue mineral affects the strength of the granulate. The purpose of this study is to investigate effect of gangue mineral existence distribution in iron ore particles on the compressive strength of the granules. To evaluate the effect of gangue, coarse and fine powders were prepared by hematite ore containing gangue and pure hematite reagent and 4 types of granulates were prepared as combinations fine/coarse and ore/reagent powders. Theses granulates were produced by wet granulation using a tire type pelletizer. Wet and dry compression strength of granulates were measured by compression tester. From the experimental results, wet compression strengths of granules were similar value and independent of gangue distribution. It is considered that the adhesion force by liquid bridge is dominant in the wet compression strength. On the other hands, the granulates with gangue mineral in fine iron ore powders showed stronger dry compression strengths than other granulates. It is considered the effect of Coulomb force due to electric surface potential difference of hematite and gangue minerals.
CLASS:PUBLIC
DTSTART:20230614T145000
DTEND:20230614T151000
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