BEGIN:VCALENDAR
VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER;CN='8th ECIC & 9th ICSTI 2022':MAILTO:info@ecic-icsti.com
LOCATION:Room „Focke Wulf“
SUMMARY:Influence of elevated temperature and gas atmosphere on coke abrasion and interface properties in blast furnace cokes
DESCRIPTION:One of the major reasons it is difficult to predict the strength of metallurgical coke is its heterogeneity. The mechanisms by which coke degrades under applied loads or stresses are not only dependent on coke composition and microstructure but also the different forms of carbon that the coke comprises, which constitute the coke microtexture. Furthermore, the ordering of the carbon domains within the microtextural constituents and the integrity of the interfaces between them are key contributors to coke strength, including its resistance to abrasion.
We have developed a novel approach which applies tribological (i.e. wear) testing techniques to examine the factors that influence coke abrasion. Moreover, we have developed the capability to assess coke abrasion resistance in-situ at elevated temperatures of up to 950°C and in controlled gas atmospheres. Bosh coke samples retrieved from an operating blast furnace and a near-matched feed coke were examined in this study.
The key findings include:
•	High temperature abrasion resistance for both cokes was lower than at room temperature. Parallel work has shown that the reduction in abrasion resistance occurs for both the RMDC and IMDC, and at interfaces.
•	CO2 attack during pre-reaction of feed coke samples was found to ‘level’ coke properties, to some extent, and effectively overwrite the effects of prior CO2 exposure in the blast furnace.
•	Bosh coke IMDC showed more severe damage than in feed coke at 950°C, suggesting that the thermal damage to the IMDC is accentuated by prior gasification.
•	In the blast furnace, the fines generated by abrasive wear may act as a lubricant or they may adversely impact the permeability of the furnace and thus its efficient operation.
•	A parallel study using pilot oven cokes from single Australian coals of varying properties has indicated that deterioration in abrasion resistance occurs at 400°C, and is accentuated at 950°C.

CLASS:PUBLIC
DTSTART:20220631T145500
DTEND:20220631T152000
END:VEVENT
END:VCALENDAR