Cleaning IF molten steel with dispersed in-situ heterophases induced by the composite sphere explosive reaction in RH ladles

Fuping,; Tang, Tang; Zhen, Zhen; Li, Qing; Xiaofeng, Xiaofeng; Wang, Hong; Ben-wen,; Chen, Guihai; Peng, Peng

doi:10.1007/s12613-201-0414-5

Cited by 1 publication

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“…Combine Eqs. (11), (24) and (27), the kinetic model of the bubble growth and floating in molten steel/(N 2 , H 2 ) system during degassing process can be obtained, as shown in Eq. 28:…”

Section: The Differential Equation For Floating Distance Of Bubblesmentioning

confidence: 99%

“…Among them, gas refining methods have been concerned and developed due to the less pollution to molten steel and good inclusion removal effect. [1][2][3][4][5][6][7][8][9][10][11] When molten steel was treated by gas refining methods, inclusions are removed by the adhesion and wake flow of bubbles. Wang 12) established a mathematical model for the probability of inclusions adhered by bubbles.…”

Section: Introductionmentioning

confidence: 99%

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Bubble Growth and Floating Behavior during Degassing Process of Molten Steel/(N2, H2) System

Zhang

Liu

et al. 2020

ISIJ Int.

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Dissolved gas flotation method has been developed to remove inclusions in molten steel. The principle is that bubbles formed on inclusions by vacuum treatment of nitrogen or hydrogen supersaturated molten steel can carry the inclusions to slag. A kinetic model was constructed to analyze the bubble growth and floating behavior during the degassing process of the method, and its accuracy was verified by related experiments. The results show that pretreatment pressure, bubble nucleation depth and gas type have significant effects on bubble growth and floating, while vacuum treatment pressure and inclusion radius have little effects on it. The growth rate and floating velocity of bubbles increase with the increase of pretreatment pressure or the decrease of bubble nucleation depth. The growth rate and floating velocity of hydrogen bubbles are much larger than those of nitrogen bubbles. Calculation results indicate that the diameters of the bubbles are mostly 0.2-10 mm during floating process via this method. Moreover, the distribution of the bubbles nucleating on the inclusions is dispersive. In addition to the bubbles carrying inclusions to slag directly, these dispersive fine bubbles have a high probability of inclusion adhesion resulting in an improvement of the inclusion removal.

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“…Combine Eqs. (11), (24) and (27), the kinetic model of the bubble growth and floating in molten steel/(N 2 , H 2 ) system during degassing process can be obtained, as shown in Eq. 28:…”

Section: The Differential Equation For Floating Distance Of Bubblesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bubble Growth and Floating Behavior during Degassing Process of Molten Steel/(N2, H2) System

Zhang

Liu

et al. 2020

ISIJ Int.

View full text Add to dashboard Cite

show abstract

Cleaning IF molten steel with dispersed in-situ heterophases induced by the composite sphere explosive reaction in RH ladles

Cited by 1 publication

References 0 publications

Bubble Growth and Floating Behavior during Degassing Process of Molten Steel/(N<sub>2</sub>, H<sub>2</sub>) System

Bubble Growth and Floating Behavior during Degassing Process of Molten Steel/(N<sub>2</sub>, H<sub>2</sub>) System

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