BEGIN:VCALENDAR
VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 17a
SUMMARY:Importance of lime reactivity in the oxygen steelmaking processes
DESCRIPTION:An ultimate goal of oxygen steelmaking process is formation of a basic slag using fluxes (lime, dolime) to remove impurities, like phosphorus and sulphur. Fluxes dissolution efficiency is important to achieve basic slag at the early stage of the process and protection of refractory lining. Limiting step in the slag formation process in the BOF represents lime dissolution kinetics in the primary acidic slag. Lime for the steelmaking process must be soft-burnt, as only this type has a high reactivity - ability to transition to the slag phase. Experimental work was carried out in a Marsh furnace to determine the mechanism of lime dissolution in the slag. Dissolution rate of different types of lime (soft, medium, and hard-burnt lime) in the typical BOF slag were compared. It has proven an excellent solubility for the soft-burnt lime, which is related to its high reactivity and a lower solubility for the hard-burnt lime. After determining the mechanism of lime dissolution in the steel slag, high-temperature experiments were performed in the induction furnace. Results were used to quantify the level of lime dissolution in the steel slag, compare it with a standard lime reactivity measurement, and for development of Value in Use Model. This in-depth study was conducted to understand the importance and to evaluate the influence of lime characteristics on BOF steelmaking process and their quantification through total cost of ownership. Besides lime dissolution, thermodynamic and the fluid dynamic approach was used, together with mass and heat balance. Value in Use Model proves the importance of lime characteristics and its impact on steel cleanliness, metallurgical results, productivity, and total cost of steel production including notably energy and CO2 balance. Model can calculate the savings and cost benefits for a given inputs, including lime and dolime,and operating parameters for respected case.  
CLASS:PUBLIC
DTSTART:20230614T102000
DTEND:20230614T104000
END:VEVENT
END:VCALENDAR