Optimization of dissolution of metals from Waelz sintering waste (WSW) by hydrochloric acid solutions

In this study Taguchi method was applied to determine the optimum conditions of dissolution of metals in Waelz sintering waste (WSW) in HCl solutions. The effects of solid-to-liquid ratio, reaction temperature, stirring speed, acid concentration, and reaction time on extraction efficiency were inves...

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Bibliographic Details
Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2010-08, Vol.162 (2), p.718-722
Main Authors: Beşe, Ayşe Vildan, Borulu, Nurcan, Çopur, Mehmet, Çolak, Sabri, Ata, Osman Nuri
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Crystallization, leaching, miscellaneous separations
Dissolution
Exact sciences and technology
Extraction
Leaching
Optimization
Reaction time
Sintering
Sintering, pelletization, granulation
Solid-solid systems
Stirring
Taguchi method
Waelz process
Wastes
Zinc
Zinc waste
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Summary:In this study Taguchi method was applied to determine the optimum conditions of dissolution of metals in Waelz sintering waste (WSW) in HCl solutions. The effects of solid-to-liquid ratio, reaction temperature, stirring speed, acid concentration, and reaction time on extraction efficiency were investigated. The optimum conditions were determined as follows: solid-to-liquid ratio, 0.1; reaction temperature, 65 °C; stirring speed, 700 rpm; acid concentration, 3 M and the reaction time, 48 min. Under these conditions, extraction efficiencies of zinc, cadmium and lead from waste were 97%, 91% and 0.052%, respectively.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2010.06.035