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VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 15a
SUMMARY:Development of circumferential stock level balancing system in blast furnace
DESCRIPTION:To meet the unprecedented demand of environmental issues and tightened production cost, fuel consumption to produce iron and steel must be minimized to the limit. In blast furnace, maintaining circumferentially balanced state is critical for stable operation and minimizing fuel rate. Circumferentially unbalanced state of furnace will result irregular burden decent, thermal level instability and poor gas utilization and so on. Hence, furnace operators carefully monitor circumferential information of furnace and take several actions to keep furnace stable. 

Among several actions, burden profile control is one of the most effective actions to change inner state of furnace and achieve minimized fuel rate. Generally, optimum burden profile can be attained by rotating chute control (speed, angle, etc.) in bell-less type blast furnace. Unfortunately, in conventional control concept, only radial directional burden control is possible while there is barely no tool to control circumferential burden profile. 

In this study, circumferential burden stock level balancing system was developed for circumferential burden profile controlling and balancing. To decide when/where to control, furnace circumferential information such as top gas temperature, sounding level and tuyere combustion status were continuously monitored and key control parameters were derived from DEM burden decent simulation of bell-less top charging system. Once burden stock level of specific direction is too low or too high, top charging system was controlled to attain flattened stock level. Developed system was installed and tested at Pohang No.3 Blast furnace and it was found that standard deviation of 4 direction’s stock level can be effectively reduced by the system. 

CLASS:PUBLIC
DTSTART:20230614T145000
DTEND:20230614T151000
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