Effects of BaO on Properties of Low Fluoride Content Mould Flux for High Speed Continuous Casting

2011 ◽  
Vol 287-290 ◽  
pp. 1866-1870 ◽  
Author(s):  
Yan Qing Lu ◽  
Xing Fang ◽  
Guo Dong Zhang
Keyword(s):  
Surface Tension ◽  
Continuous Casting ◽  
Melting Temperature ◽  
High Speed ◽  
Great Influence ◽  
Fluoride Content ◽  
Crystallization Property ◽  
Mould Flux ◽  
Effective Role

In order to reduce fluorine pollution, partial fluoride could be replaced by BaO in mould flux. The effects of BaO on melting temperature, viscosity, fluidity, surface tension, Al2O3 inclusion and adsorption of low fluoride content mould flux for high speed continuous casting were studied, as well as the effect of basicity on crystallization property. The results showed that with the increase of BaO content, melting temperature, viscosity and surface tension of mould flux decreased obviously, and fluidity and Al2O3 inclusion adsorption increased. Partial fluoride could be replaced by BaO in mould flux. The BaO content should be less than 4 per cent so that it can play an effective role. The basicity had great influence on crystallization property.

Effects of Li2O on Properties of Low Fluoride Content Mould Flux for High Speed Continuous Casting

2011 ◽  
Vol 306-307 ◽  
pp. 1549-1552
Author(s):  
Yan Qing Lu ◽  
Guo Dong Zhang ◽  
Mao Fa Jiang
Keyword(s):  
Surface Tension ◽  
Continuous Casting ◽  
Melting Temperature ◽  
High Speed ◽  
Fluoride Content ◽  
Mould Flux ◽  
Effective Role

In order to reduce fluorine pollution, partial fluoride could be replaced by Li2O in mould flux. The effects of Li2O on properties of low fluoride content mould flux for high speed continuous casting were studied. The properties included melting temperature, viscosity, fluidity, surface tension and Al2O3 inclusion adsorption. The results showed that with the increase of Li2O content, melting temperature and viscosity of mould flux decreased obviously, fluidity increased, surface tension changed little, and Al2O3 inclusion adsorption of mould flux increased. In order to play an effective role, the appropriate Li2O content should be less than 4 per cent. The crystallization state of mould flux changed after slag adsorbed Al2O3. There were some small cuspidine and wollastonite crystals in the sample.

Effects of K2O on Properties of Low Fluoride Content Mould Flux for High Speed Continuous Casting

2011 ◽  
Vol 71-78 ◽  
pp. 2899-2902 ◽  
Author(s):  
Yan Qing Lu ◽  
Xing Fang ◽  
Guo Dong Zhang
Keyword(s):  
Surface Tension ◽  
Continuous Casting ◽  
Melting Temperature ◽  
High Speed ◽  
Fluoride Content ◽  
Mould Flux ◽  
Effective Role

In order to reduce fluorine pollution, partial fluoride could be replaced by K2O in mould flux. The effects of K2O on melting temperature, viscosity, fluidity, surface tension, Al2O3 inclusion and adsorption of low fluoride content mould flux for high speed continuous casting were studied. The results showed that with the increase of K2O content, melting temperature, viscosity and surface tension of mould flux decreased obviously, and fluidity and Al2O3 inclusion adsorption increased. When basicity was 0.81, 1.03 and 1.22, the suitable content of K2O was 5%, 5% and 4% respectively, which could play an effective role. Partial fluoride could be replaced by K2O in mould flux.

Effects of B2O3 on Properties of Low Fluoride Content Mould Flux for Thin Slab Continuous Casting

2011 ◽  
Vol 233-235 ◽  
pp. 805-808 ◽  
Author(s):  
Yan Qing Lu ◽  
Guo Dong Zhang ◽  
Mao Fa Jiang
Keyword(s):  
Activation Energy ◽  
Surface Tension ◽  
Continuous Casting ◽  
Melting Temperature ◽  
Fluoride Content ◽  
Thin Slab ◽  
Slab Continuous Casting ◽  
Mould Flux ◽  
Effective Role

In order to reduce fluorine pollution, partial fluoride could be replaced by B2O3 in mould flux. The effects of B2O3 on properties of low fluoride content mould flux for thin slab continuous casting were studied. The properties included melting temperature, viscous characteristics, fluidity, surface tension and Al2O3 inclusion adsorption. The results showed that with the increase of B2O3 content, melting temperature, viscosity, viscous activation energy and surface tension of mould flux decreased obviously, fluidity increased, and Al2O3 inclusion adsorption of mould flux changed little. The B2O3 could play effective role when its content was less than 6%. The results would play a guiding role in designing of low fluoride content mould flux for thin slab continuous casting.

Effects of Li2CO3 on Properties of Mould Flux for High Speed Continuous Casting

2011 ◽  
Vol 675-677 ◽  
pp. 877-880 ◽  
Author(s):  
Yan Qing Lu ◽  
Guo Dong Zhang ◽  
Mao Fa Jiang ◽  
Hai Xiao Liu ◽  
Ting Li
Keyword(s):  
Activation Energy ◽  
Surface Tension ◽  
Continuous Casting ◽  
Melting Temperature ◽  
High Speed ◽  
Mould Flux ◽  
Effective Role ◽  
Al2o3 Inclusion

The effects of Li2CO3 on melting temperature, viscosity, fluidity, surface tension and Al2O3 inclusion adsorption of mould flux for high speed continuous casting were studied. The results showed that with the increase of Li2CO3 content, melting temperature, viscosity and viscous activation energy of mould flux decreased obviously, fluidity increased, surface tension changed little, and Al2O3 inclusion adsorption of mould flux increased. In order to play an effective role, the Li2CO3 content should be less than 4 per cent. The results will play a guiding role in designing of mould flux for high speed continuous casting.

Effects of NaF on Mould Flux Properties for Thin Slab Continuous Casting

2012 ◽  
Vol 455-456 ◽  
pp. 134-138 ◽  
Author(s):  
Yan Qing Lu ◽  
Guo Dong Zhang ◽  
Xiao Feng Yu
Keyword(s):  
Surface Tension ◽  
Continuous Casting ◽  
Melting Temperature ◽  
Thin Slab ◽  
Slab Continuous Casting ◽  
Mould Flux ◽  
Industrial Material ◽  
Synthetic Test ◽  
Effective Role ◽  
Al2o3 Inclusion

Using industrial material and synthetic test instrument for the physical characteristics of slag, the effects of NaF on melting temperature, viscosity, fluidity, surface tension and Al2O3 inclusion adsorption of mould flux for thin slab continuous casting were studied. The results showed that with the increase of NaF content, melting temperature, viscosity and surface tension decreased obviously, and fluidity and Al2O3 inclusion adsorption increased. The effects of basicity on properties should be taken into account. NaF could play effective role when its content was less than 9%. The results would play a guiding role in designing of mould flux for thin slab continuous casting.

Effects of Na2CO3 on properties of low fluoride content mould flux for thin slab continuous casting

2011 ◽  
Vol 23 ◽  
pp. S167-S169 ◽  
Author(s):  
Yanqing Lu ◽  
Guodong Zhang ◽  
Maofa Jiang ◽  
Haixiao Liu ◽  
Ting Li
Keyword(s):  
Continuous Casting ◽  
Fluoride Content ◽  
Thin Slab ◽  
Slab Continuous Casting ◽  
Mould Flux

Computational and Experimental Characterization of Single Bubble Dynamics in Isothermal Liquid Pools

2007 ◽  
Author(s):  
A. Subramani ◽  
S. K. Kasimsetty ◽  
R. M. Manglik ◽  
M. A. Jog
Keyword(s):  
Surface Tension ◽  
Bubble Growth ◽  
High Speed ◽  
Bubble Dynamics ◽  
Great Influence ◽  
Growth Dynamics ◽  
Equivalent Diameter ◽  
Parametric Effects ◽  
Liquid Pools ◽  
Visualization Techniques

The process of bubble growth is of great influence on the bubble volume and bubble rise velocity. The overall behavior of bubbles at fluid interfaces depends strongly on bubble growth and the closely linked process of bubble detachment. In the present study, the dynamics of a single gas bubble emanating from an orifice submerged in isothermal liquid pools is investigated computationally and experimentally. The parametric effects of liquid properties, capillary diameters and air flow rates on the bubble shape, equivalent diameter, and growth times on the dynamic behavior (incipience, growth and necking) of air bubbles, in fluids of varying surface tension and viscosity, as it grows from a tip of a sub-millimeter-scale capillary orifice have been studied. Computational solutions have been obtained by solving the complete set of governing equations using Volume of Fluid (VOF) interface tracking method. The CFD model has been verified experimentally using optical high speed micro-scale flow visualization techniques. The results were analyzed in a theoretical stand point considering the various forces acting on the bubble such as forces due to buoyancy, viscosity, surface tension, liquid inertia, and gas momentum transport, and the consequent motion of the gas-liquid interface. The results obtained ascertain the role of liquid-gas interfacial forces as well as the fluid properties on the bubble growth dynamics.

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