W. Zabban
Sep 1, 1988
Citations
0
Influential Citations
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Citations
Journal
Journal of Heat Treating
Abstract
This paper covers primarily the disposal of salt baths containing cyanide and barium salts and of the rinses or quenching waters resulting from those operations. The applicable environmental regulations are presented.The salts are first dissolved in either water or spent rinses. Well-known, relatively inexpensive treatment processes are presented using sodium hypochlorite to oxidize cyanides and sodium sulfate to precipitate barium sulfate from aqueous solutions. The resulting sludges are dewatered in filter presses, yielding filter cakes which are normally not hazardous.The rinses and quench waters are treated in a manner similar to the salts.