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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 17a
SUMMARY:Innovative high-speed gunning BOF hot repair
DESCRIPTION:The challenge in front of us with this prototype system has been significant, not only how to increase the speed of repair material delivery into the hot furnace, but more significantly, to do this immediately after the furnace has been emptied of molten slag. Successful repairs have taken place with lining temperatures measured by digital pyrometry at +1600 °c. Our internal objective to deliver one tone of gunning mass in less than five minutes has been exceeded consistently reducing the overall repair schedule time which typically takes up to twenty minutes after a furnace cooling down period. High speed gunning has not only achieved a record average repair gunning rate of 244kg/minute. We have achieved this consistently without any cooling down period. High speed gunning likens itself to a formula one racing car strategy for steelmakers, with fast set up, repair, and removal of equipment, all aspects of the system from material formulation to the equipment specification is designed to minimize repair time. The total repair downtime of 10 minutes has been achieved. Allowing the steelmaking cycle to restart immediately. A recent 5-day study of the technology in a 325t BOF Furnace has delivered a repair area lining thickness increase of 147mm from the high-speed application between 1776 to 1851 lives of the furnace, during this period ten high speed repairs took place. The repair speed, lining thickness increase, and overall time saving has Exceeded the steelmakers expectations of what is possible in the lower cone area of the hot BOF furnace. In the following paper we will present the system design advantages and share the results from industrial trial of the system.
CLASS:PUBLIC
DTSTART:20230615T115000
DTEND:20230615T121000
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