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Conference Papers Year : 1999

Thermal treatments of jarosite


Jarosite contains up to 15 % of heavy metal compounds 'HMC', The current waste disposal methods will not be allowed in the near future due to new environmental regulations and pollution risks. For these reasons, thermal treatments of raw or decomposed jarosite, in controlled atmospheres, were investigated. The aim of these treatments is to decontaminate the jarosite and/ or to recover the HMC for recycling, According to physico-chemical characteristics of the samples, the thermal treatments in controlled atmospheres N2, CO+N2 and Cl2+air lead to the extraction rate that vary from 93 to 98 %, Heavy metal compounds were separated by cooling the gaseous phase. The treatments' residue was almost free from HMC. Between 700 degrees C and 800 degrees C, the chlorinating treatment was successful of eliminating more than 97 % of HMC contained in four different samples.
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hal-01510843 , version 1 (20-04-2017)



I. Gaballah, Antoine Bonazébi, Ndue Kanari. Thermal treatments of jarosite. 1999 TMS Annual Meeting, 1999, SAN DIEGO, CA, United States. pp. 893-904. ⟨hal-01510843⟩


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