Developments Toward an Intelligent Electric Arc Furnace at - Tenova
Developments Toward an Intelligent Electric Arc Furnace at - Tenova
Developments Toward an Intelligent Electric Arc Furnace at - Tenova
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1.00<br />
0.50<br />
0.00<br />
-0.50<br />
-1.00<br />
-1.50<br />
-2.00<br />
-2.50<br />
-3.00<br />
-3.50<br />
Oct-05 Nov-05 Dec-05 J<strong>an</strong>-06 EFSOP Evalu<strong>at</strong>ion Period, Feb 20 -<br />
Mar 19, 2006<br />
-3.23<br />
-3.15<br />
Figure 13: Productivity Increase Induced Additional Profit, $ / inventory cast ton<br />
The m<strong>at</strong>hem<strong>at</strong>ical formula for the calcul<strong>at</strong>ion of benefits due to increased yield is presented below:<br />
-3.05<br />
1<br />
yield($<br />
/ InvCastTon)<br />
= 100 * ScrapCost * (<br />
Yield<br />
REF<br />
0.00<br />
1<br />
− )<br />
Yield<br />
Scrap Cost is the current nominal market value of scrap ($ per ton metallic charge) <strong>an</strong>d has been assumed to be $210/ton ([3]).<br />
YieldREF <strong>an</strong>d Yield are the average yield values for the reference <strong>an</strong>d the evalu<strong>at</strong>ion periods, respectively (in %). It is a measure of the<br />
amount of scrap saved by improving yield. Figure 14 is the plot of the average savings resulting from yield improvement. The savings<br />
in scrap for the evalu<strong>at</strong>ion period are $1.25 per ton inventory cast compared to J<strong>an</strong>-06.<br />
0.66
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