Homogeneous nucleation of CO bubbles in Fe-C-O melts

Levine, H.S.

doi:10.1007/bf02643087

Cited by 15 publications

(2 citation statements)

References 18 publications

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“…y50?023 was obtained based on one of the measured CO evolution rate, y value between 0 and 1 has been shown to be reasonable in several systems. 43,44,47 Recalculating the bubble radius, r52?64610 29 m, this bubble would contain 54 molecules. This is consistent with studies of dissolved gas in water where there are typically a few hundred molecules in the critical nucleus.…”

Section: Discussion Co Nucleation Inside Metalmentioning

confidence: 99%

Kinetic study of droplet swelling in BOF steelmaking

Chen

Coley

2010

Ironmaking & Steelmaking

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Previous work in the authors' laboratory has shown that an understanding of droplet swelling is essential in predicting droplet residence times in basic oxygen steelmaking. Several workers have observed swelling of high carbon droplets when exposed to oxidising slags. In the present work, the authors present data on swelling rates measured by X-ray fluoroscopy and compare this with the total volume of gas evolved during the reaction. It is shown that only a small percentage of the gas generated is retained in the droplet to contribute to swelling. The gas generation rate is shown to be controlled by the rate of nucleation of CO bubbles inside the droplet. The critical supersaturation pressure for nucleation is found to be two orders of magnitude less than predicted from theory, which is in keeping with many other studies on nucleation of gases in liquids. However, the effect of surface tension, temperature and saturation pressure shows quantitative agreement with theory.

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Section: Discussion Co Nucleation Inside Metalmentioning

confidence: 99%

Kinetic study of droplet swelling in BOF steelmaking

Chen

Coley

2010

Ironmaking & Steelmaking

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“…15. Levine has suggested chemisorption of oxygen ions as the reason for the ease of bubble nucleation in the cases of electrolytic oxygen evolution and the formation of CO bubbles in molten iron.…”

Section: Introductionmentioning

confidence: 99%

Why Is It Much Easier To Nucleate Gas Bubbles than Theory Predicts?

2003

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Bubble nucleation from supersaturated gas solutions generally takes place at much lower supersaturations than are expected from the theory. Furthermore, the same theory predicts that the threshold concentration of gas needed to cause nucleation should be essentially independent of the gas species used, a finding contradicted by experiment. There are two general explanations: first, that the theory is wrong, or second, that there is a previously unidentified factor which is influencing the results of the experiments. Given the success of the fundamental theory in other areas, the second explanation is preferred. The previously unrecognized factor is identified here as being the surface activity of the gases which form the bubbles.

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