Dioxin formation and suppression in the iron ore sintering process

摘要

Fundamental studies previously carried out by Corus UK concluded that dioxins were most likely to be formed within the sinter bed.Subsequently,process-integrated technologies were investigated for reducing the formation and emission of dioxins from the iron ore sintering process.Initial feasibility trials on a range of full scale production plants showed that dioxin emissions could be reduced by at least 50% by addition of small amounts of urea to the raw sinter mix and offered a cost-effective method for the abatement of dioxins.It was also established that the technique was fully transferable from one plant to another.Longer term proving trials were carded out over a period of two years to demonstrate that there were no adverse effects from the use of this technology,followed by its implementation on all Corus UK sinter plants.This paper describes work undertaken by Corus UK from initial fundamental studies on dioxin formation through to final implementation of urea addition technology on UK sinter plants.