Metal extraction with focus on Zn from fly ash by means of using acid process waters

Every year over 5 000 000 ton of solid waste are combusted in Sweden. In addition to the production of heat and electricity, this also results in large quantities of ash. The bed ash, or slag, is used as construction material on landfills, while the fine fly ash is deposited. The reasons to this deposition are the content of potential hazardous metal compounds and easily leached chlorides. Several metals as for example Cu and Zn can be found in concentrations of the same level or even higher in the ash compared to metal ores used for mining. Thus, there is a large interest to develop methods for metal extraction from ash.

Diary number


Start date


End date