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

Wang, Jingxiu; Wang, Zhe; Zhang, Zhongzhi; Zhang, Guangqing

doi:10.3390/met9040417

Cited by 5 publications

(2 citation statements)

References 19 publications

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“…A key finding was butyric acid cannot dissolve ZnFe 2 O 4 (franklinite). To assess the butyric route, three BOF filter cakes with 2.42%, 6.52%, and 13.8% Zn, as well as weathered samples, were tested [92]. After optimum leaching, 2-3% Zn remained.…”

Section: Leaching With Organic Acidsmentioning

confidence: 99%

Hydrometallurgical Processes for the Recovery of Metals from Steel Industry By-Products: A Critical Review

Binnemans

Jones

Fernández

et al. 2020

J. Sustain. Metall.

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The state of the art for the recovery of metals from steel industry by-products using hydrometallurgical processes is reviewed. The steel by-products are different slags, dusts, and sludges from a blast furnace (BF), basic oxygen furnace (BOF), electric arc furnace (EAF), and sinter plant, as well as oily mill scale and pickling sludge. The review highlights that dusts and sludges are harder to valorize than slags, while the internal recycling of dusts and sludges in steelmaking is inhibited by their high zinc content. Although the objectives of treating BF sludges, BOF sludges, and EAF dust are similar, i.e., the removal of zinc and the generation of an Fe-rich residue to be returned to the steel plant, these three classes of by-products have specific mineralogical compositions and zinc contents. Because wide variations in the mineralogical composition and zinc content occur, it is impossible to develop a one-size-fits-all flow sheet with a fixed set of process conditions. The reason for the interest in EAF dust is its high zinc content, by far the highest of all steel by-products. However, EAF dust is usually studied from the perspective of the zinc industry. There are not only different concentrations of zinc, but also variations in the all-important ZnO/ZnFe2O4 (zincite-to-franklinite) ratio. In many chemical processes, only the ZnO dissolves, while the ZnFe2O4 is too refractory and reports to the residue. It only dissolves in concentrated acids, or if the dust is pre-treated, e.g., with a reductive roasting step. The dissolution of ZnFe2O4 in acidic solutions also brings significant amounts of iron in solution. Finally, due to its high potassium chloride content, sinter-plant dust could be a source of potassium for the fertilizer industry. Graphical Abstract

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Section: Leaching With Organic Acidsmentioning

confidence: 99%

Hydrometallurgical Processes for the Recovery of Metals from Steel Industry By-Products: A Critical Review

Binnemans

Jones

Fernández

et al. 2020

J. Sustain. Metall.

View full text Add to dashboard Cite

show abstract

“…Wang et al [1] contributed an article entitled "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 to further establish the correlation between the zinc leaching performance and chemical composition.…”

Section: Contributionsmentioning

confidence: 99%