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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 17a
SUMMARY:Reliable production of low sulphur steel grades without a ladle metallurgy furnace 
DESCRIPTION:Oxygen Steelmaking
Reliable Production of Low Sulphur Steel Grades Without a Ladle Metallurgy Furnace
The annual production of the Steelplant in question is 5 million metric tons of Flat Rolled Products. A significant percentage of the product mix requires final Sulphur levels of less than 50 ppm (0.0050 wt% [S]).  When these steel Grades were scheduled, special steps were needed to minimize Downgrades and Cast Sequence Interruptions. The mandatory steps to be followed were:
A -Desulphurize the incoming Hot Metal to 10ppm [S] or less
B -Skim the “HECK” out of the Hot Metal transfer ladle, without regard to Yield losses
C –Use only special low Sulphur scrap metal both at the BOF and at the Ladle Treatment Station as coolant
D –Use special Low Sulphur Alloy Materials
A careful study of the difference in chemistry between the final BOF-Slag and the required final LTS-Slag for a successful, final low Sulphur was carried out.

In the end, new special steps, namely;
E –Targeted control of the amount of BOF carryover slag
F –Complete deoxydation of steel and carryover slag at BOF-Tap using Designed Deoxydation Cocktails
G –Intensive and Efficient stirring at the LTS 
helped; -Reduce Hot metal skim losses, 
	-Minimize Scrap metal cost
	-Optimize the use of expensive special low Sulphur alloy materials.


Author; Dr.-Ing. Champion Chigwedu
Technical Director of HT-PEACS LLC, USA.
Tel.: +1 (703-350-7698)
Email: 	cchigwedu@gmail.com 
cchigwedu@yahoo.com


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DTEND:20230615T102000
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