Removing Stress

A weldment that I did several weeks ago, all of the parts were made in a mill, after welding the main structure went back in the mill and the top and bottom surfaces were skimmed flat and the holes reamed as the drawing specified a +.002"-.000" bores.
weldment1_zpsvueipbz6.jpg

weldment2_zpswurtouli.jpg

I have no clue what this thing does aside from the description on the drawing which is "Slag Skimmer", I assume that it is part of a device that skims the slag from the surface of the crucible of an induction furnace used in steel making.
 
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