Identification of Fe–Al–Zn dross phase in galvanised zinc bath and its separation by method of alternating magnetic field

Dong, Anping; Shu, Da; Wang, J.; Sun, Baode

doi:10.1179/174328108x369062

Cited by 10 publications

(9 citation statements)

References 11 publications

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“…5. It is similar to GA, GI 14 and Zn-4?50 wt-%Al baths. It can be seen that most of zinc dross particles congregate at the sidewall of the pipe (Fig.…”

Section: Metallography Of Zinc Dross In Different Zinc Alloys and Itssupporting

confidence: 52%

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Separation behaviour of zinc dross from hot dip galvanising melts of different aluminium concentrations by alternating magnetic field

Dong

Shu

Wang

et al. 2009

Ironmaking & Steelmaking

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Dross in zinc pots is the most important factor that impairs the surface quality of hot dip galvanising automobile steel sheet. Separation behaviour of zinc dross from galvanising melts of different Al concentrations (0?12, 4?5 and 55?0 wt-% by an alternating magnetic field has been investigated in order to reduce the dross defects on steel sheets. The properties of different zinc drosses were investigated by means of EDAX and the quantitative metallographic method and the conductivities were measured by physics property measurements system. The experimental results show that the zinc dross in different hot dip galvanising melts has different morphologies, compositions and structures, and the average particle size of the dross increases with the Al concentration. In the case of extra iron (above the solubility limit) in the zinc melt, zinc dross quantity also increases with the Al concentration. All of the three types of zinc dross particles .5 mm can be successfully separated when the magnetic frequency is 17?5 kHz, effective magnetic flux intensity is 0?05 T, imposed time is 15 s and the cross-section of the ceramic square pipe is 565 mm.

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“…5. It is similar to GA, GI 14 and Zn-4?50 wt-%Al baths. It can be seen that most of zinc dross particles congregate at the sidewall of the pipe (Fig.…”

Section: Metallography Of Zinc Dross In Different Zinc Alloys and Itssupporting

confidence: 52%

“…1 and procedure for zinc dross electromagnetic separation can be referenced in the authors' research results. 14 …”

Section: Experimental Apparatus and Proceduresmentioning

confidence: 99%

Separation behaviour of zinc dross from hot dip galvanising melts of different aluminium concentrations by alternating magnetic field

Dong

Shu

Wang

et al. 2009

Ironmaking & Steelmaking

Self Cite

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show abstract

“…In addition, salvaging the dross at regular intervals would cause a loss in efficiency. Dross can usually be removed by applying an external magnetic field or a specific device in the process of galvanizing [8][9][10], but these methods only remove the top or floating dross, it is difficult to deal with the hard and heavy bottom dross [11]. The routine reasons for the formation of bottom dross during the galvanizing process are the high content of Al and the supersaturated iron in zinc pot.…”

Section: Introductionmentioning

confidence: 99%

The Evaluation on Corrosion Resistance and Dross Formation of Zn–23 wt % Al–0.3 wt % Si–x wt % Mg Alloy

Peng

Lü

et al. 2019

Coatings

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: A comparative study of the corrosive resistance and dross formation of 55Al–Zn–1.6Si (wt%) (55AZS) and 23Al–Zn–0.3Si–xMg (wt%) (23AZS–xMg, x = 0, 1.5, 3) alloys are performed using immersion corrosion and dross formation test, respectively. The result of immersion corrosion testing shows that corrosive rate of the 23AZS alloy is lower than that of 55AZS alloy in the latter stage of immersion and 23AZS–1.5Mg alloy shows the optimal corrosive resistance compared to other alloys relatively. The result of dross formation test shows that the number of bottom dross particle formed in 23AZS–xMg (x = 0, 1.5, 3) alloy is less than that in 55AZS alloy. Moreover, the thermodynamic calculation is performed to reveal the solubility of Fe in the alloys, the result shows the solubility of Fe reduces as a decrease of Al content in the alloy, and the number of dross particle (Fe4Al13 and 6 (Al9Fe2Si2) phase) generated in 23AZS alloy is more than that in 55AZS alloy. In general, 23AZS–1.5Mg alloy has an advantage of less dross and a certain corrosion resistance and it is expected to be applied for the hot stamping process of coating.

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“…Furthermore, various kinds of apparatuses used in a molten zinc bath should ideally not result in dross particles adhering to the steel sheets. [1][2][3] To achieve this outcome, it is important to understand the exact three-dimensional shape of dross particles to design apparatus with this attribute. Moreover, understanding the detailed fracture morphology of dross particles is important to elucidate the mechanism underlying the formation of surface defects caused by dross particles.…”

Section: Introductionmentioning

confidence: 99%

Determination of Facet Plane and Cleavage Fracture Plane of the Top Dross Formed in a Molten Zinc Bath

et al. 2021

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Identification of Fe–Al–Zn dross phase in galvanised zinc bath and its separation by method of alternating magnetic field

Cited by 10 publications

References 11 publications

Separation behaviour of zinc dross from hot dip galvanising melts of different aluminium concentrations by alternating magnetic field

Separation behaviour of zinc dross from hot dip galvanising melts of different aluminium concentrations by alternating magnetic field

The Evaluation on Corrosion Resistance and Dross Formation of Zn–23 wt % Al–0.3 wt % Si–x wt % Mg Alloy

Determination of Facet Plane and Cleavage Fracture Plane of the Top Dross Formed in a Molten Zinc Bath

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