Spin atomisation makes tighter, safer aluminium

Sheikhaliev, Sheikhali M; Sheikhalieva, Zalina I.; Dunkley, John

doi:10.1016/s0026-0657(08)70022-5

Cited by 12 publications

(14 citation statements)

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“…The particles became finer with increasing angular speed because of increased centrifugal force that spreads the liquid metal film on the surface of the disc 5 . This is consistent with prior results on the atomisation of tin 3 , magnesium alloy 11 , aluminum 19 , and lead-free solder alloy 20 . The particle size from the present study is compared with that calculated by using empirical models shown in equations.…”

Section: Effects Of Rotating Speedsupporting

confidence: 92%

“…As a result the non-fully wetting melt on a flat disc is most likely to disintegrate well before reaching the disc edge and thus big droplets 9 . The slippage of melt depends on density of melt and wetting of the disc surface with melt 19 . The wetting between melt and disc surface can be improved by coating with the material being atomised; the coated disc will have less slippage leading to a decrease in the median particle size 20 .…”

Section: Effects Of Rotating Speedmentioning

confidence: 99%

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Influence of Process Parameters on Zinc Powder Produced by Centrifugal Atomisation

2017

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An experimental centrifugal atomiser was used to study the manufacture of zinc powder. Melt temperature, melt flow rate, rotating speed and diameter of the atomising disc, are operating parameters that were varied, and their effects on powder quality and yield were observed. The median particle size and the particle size distribution tended to be better, i.e. smaller and narrower, with increasing rotating speed, melting temperature, and atomising disc size. With decreasing melt flow rate, the median particle size decrease and the particle size distribution is similar, all curves are almost overlapping. The yield of zinc powder increased with rotating speed and disc size, and decreased with melt flow rate. Apparent densities of zinc powder were in the range from 1.65 to 2.51 g/cm 3 . In SEM micrographs most zinc particles were irregular in shape, and the particle structure was mainly cellular based on optical imaging after etching of a polished surface.

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Section: Effects Of Rotating Speedsupporting

confidence: 92%

Section: Effects Of Rotating Speedmentioning

confidence: 99%

Influence of Process Parameters on Zinc Powder Produced by Centrifugal Atomisation

2017

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“…A higher disc speed exerts more centrifugal force and energy on the liquid metal film spreading on the surface of the disc and consequently finer particles are obtained [16]. This result is consistent to those previously reported by researchers for the atomization of tin [2], magnesium alloy [9], aluminum [17] and lead-free solder alloy [18]. It is noted that there is a deviation of the experimental result from the predictions using Equation 1.…”

Section: A Effect Of Atomizer Disc Speedsupporting

confidence: 89%

“…It is noted that there is a deviation of the experimental result from the predictions using Equation 1. This deviation may result from the slippage of melt [2], [17] or it may reflect the time dependent thickness of the oxide film on the melt droplet. Slippage depends on density of melt and wetting of the disc material surface [17].…”

Section: A Effect Of Atomizer Disc Speedmentioning

confidence: 99%

“…Spherical shape powder was not favored to take place may be due to the oxidation on the surface of the melt droplets. The oxide film would prevent spheroidization of the melt droplets during solidification [17], [18]. Moreover, Angers et al [9] reported that during centrifugal atomization of AZ91 alloy the irregular particles did not form by an atomization mechanism but by fragmentation of a layer of the atomized melt which solidified at the surface of the rotating disc.…”

Section: B Trajectory Of Dropletmentioning

confidence: 99%

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Design and Development of a Centrifugal Atomizer for Producing Zinc Metal Powder

Sungkhaphaitoon¹,

Plookphol²,

Wisutmethangoon³

2012

IJAPM

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Abstract-In the present work a preliminary design of a centrifugal atomizer for producing zinc metal powder was studied. In the design process, the consumed power and the atomizing disc size were first estimated. The trajectory of flying melt droplet from the edge of atomizer disc and the temperature profile were predicted using a concept of heat transfer in an external flow for calculating the size of atomizer chamber. A simple laboratory-scale atomizer was built. The performance of the atomizer was studied by using pure zinc metal as a model material. The effects of rotating disc speed on median particle size, particle size distribution and standard deviation, production yield, and morphology of the atomized zinc powder were investigated. The atomization was carried out using graphite flat disc, melt pouring temperature, preheating disc temperature and melt feed rate of 40 mm, 550 °C, 300 °C and 50 kg/h, respectively. The atomizer disc speeds were varied from 10,000 to 30,000 rpm. It was evidenced from the experimental results that the median particle size and standard deviation of zinc metal powder decreased with increasing disc speed. The production yield tended to increase with increasing rotating speed. SEM images revealed that most zinc metal particles were irregular, elongated flakes. The produced zinc power in this study may be suitable for use as a friction material for manufacturing brake pad in the automotive part industry.Index Terms-Centrifugal atomization; design process; particle size distribution; zinc metal powder.

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Centrifugal-Granulation-Assisted thermal energy recovery towards low-carbon blast furnace slag treatment: State of the art and future challenges

Tan

Wang

et al. 2022

Applied Energy

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Spin atomisation makes tighter, safer aluminium

Cited by 12 publications

References 0 publications

Influence of Process Parameters on Zinc Powder Produced by Centrifugal Atomisation

Influence of Process Parameters on Zinc Powder Produced by Centrifugal Atomisation

Design and Development of a Centrifugal Atomizer for Producing Zinc Metal Powder

Centrifugal-Granulation-Assisted thermal energy recovery towards low-carbon blast furnace slag treatment: State of the art and future challenges

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