Cyanide Removal in Blast Furnace Wastewater Using Chlorine Dioxide

Blast furnace gas is one source of pollution of most concern in iron and steel manufacturing, cyanide. Consequently, cyanide compounds are found in wastewater streams from blast furnace stack gas scrubbing. These compounds are very toxic and must be removed from the wastewater prior to discharge. The oxidizable cyanide WAD cyanide, and labile metal-cyanide complexes can be treated with chlorine dioxide. This presentation will focus on using PURATE technology to produce chlorine dioxide for treatment of oxidizable cyanide. PURATE is designed to safely and reliably produce chlorine dioxide on-site where it can be fed either continuously or on demand.

Jacob Lauritzen | NALCO Water, an Ecolab Company