Treatment of waste pickling baths from a batch hot-dip galvanizing plant
Masters Thesis
Title | Treatment of waste pickling baths from a batch hot-dip galvanizing plant |
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Type | Masters Thesis |
Authors | |
Author | Trzcinski, Antoine |
Supervisor | Dochain, Denis |
Warichet, Ir. D. | |
van Lierde, A. | |
Institution of Origin | Catholic University of Louvain-la-Neuve |
Qualification Name | Master in Chemical Engineering |
Number of Pages | 123 |
Year | 2005 |
Abstract | The Galva Power Group - UCL patented process for the treatment of waste pickling baths from a batch The first way is to oxidize and precipitate the inhibitor with ferric chloride. Some inhibitors were destabilized The second way is the adsorption of the inhibitor onto activated carbon. It has been found than more The third step of the process involves the sulfide precipitation of heavy metals selectively with respect Furthermore, experiments have shown that pH 3 is beneficial as a zinc elimination percentage of 95 % was attained which corresponds to 0,17 g Zn2+/l in the solution. Lead and copper are also eliminated with high percentages, over 97,4 and 89 % respectively. Tin and nickel are partly removed by co-precipitation: over 50%and 33%respectively. Manganese is not eliminated. The kinetic investigations have revealed that zinc precipitation seems to follow a 3/2 order kinetics during the first half hour and a second order kinetics during the maturation. Finally, upscaling calculations have found that a larger (0,5 m3) but geometrically identical reactor would require 2,7 kW to stir the liquid in such conditions. |
Keywords | waste pickling baths |
ANZSRC Field of Research 2020 | 401903. Hydrometallurgy |
Byline Affiliations | Catholic University of Leuven, Belgium |
https://research.usq.edu.au/item/q4w64/treatment-of-waste-pickling-baths-from-a-batch-hot-dip-galvanizing-plant
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