Comparison of Butyric Acid Leaching Behaviors of Zinc from Three Basic Oxygen Steelmaking Filter Cakes

The selective leaching of zinc from three different basic oxygen steelmaking (BOS) filter cakes by butyric acid was investigated to compare the leaching behaviors of zinc and further to establish the correlation of the zinc leaching performances and the chemical compositions. The effects of acid con...

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Bibliographic Details
Published in:Metals (Basel ) 2019-04, Vol.9 (4), p.417
Main Authors: Wang, Jingxiu, Wang, Zhe, Zhang, Zhongzhi, Zhang, Guangqing
Format: Article
Language:English
Subjects:
Acid leaching
BOS filter cakes
Butyric acid
Chemical composition
Composition effects
Core loss
Dust
Efficiency
Experiments
Iron
Iron and steel making
Leaching
leaching behaviors
Metal oxides
Mineralogy
Oxygen steel making
Scanning electron microscopy
selective leaching
Selectivity
Steel production
Zinc
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Summary:The selective leaching of zinc from three different basic oxygen steelmaking (BOS) filter cakes by butyric acid was investigated to compare the leaching behaviors of zinc and further to establish the correlation of the zinc leaching performances and the chemical compositions. The effects of acid concentration and the acid to solid (L/S) stoichiometric ratio were studied, with different optimal leaching conditions obtained. BOS-1 showed the lowest leachability with only less than 10% of zinc removed by 0.5 M acid concentration and 90% of the L/S stoichiometric ratio in 10 h. The best zinc selectivity was achieved with BOS-2 at 51.2% of zinc leaching efficiency, with only 0.47% of iron loss under optimal conditions of 1.5 M acid concentration and a 70% stoichiometric ratio. BOS-3 showed the highest leaching of zinc but the optimal conditions depend on the priority consideration. Using 1.0 M acid and 90% stoichiometric ratio for 10 h, the leaching efficiency of zinc was 84.6% with 20% iron loss. The filter cakes and the leaching residues were characterized. The results indicate different zinc and iron leaching behaviors, which were probably related to the storage conditions, zinc containing phases and the leaching parameters.
ISSN:2075-4701
2075-4701
DOI:10.3390/met9040417