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 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 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 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 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 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

The Mould Flux Viscosity Designing of High Carbon Steel for Thin Slab Continuous Casting

2014 ◽  
Vol 1022 ◽  
pp. 48-51
Author(s):  
Hui Rong Li ◽  
Li Gen Sun ◽  
Li Qun Ai
Keyword(s):  
Carbon Steel ◽  
Continuous Casting ◽  
Melting Temperature ◽  
Orthogonal Experiment ◽  
High Carbon Steel ◽  
Thin Slab ◽  
High Carbon ◽  
Slab Continuous Casting ◽  
Mould Flux

Viscosity is very important for the high carbon steel for thin slab continuous casting, in this research the orthogonal experiment has been carried out, and the results showed that: the effect for the flux viscosity form strong to weak is: R>F>BaO>Na2O>MgO. and in the experiment range, with the R increasing, when the R is between 0.80 and 0.90, the flux viscosity is diminished slowly; but when the R is bigger than 0.90, the flux viscosity is diminished sharply; Na2O,MgO and F- could decrease the flux viscosity; BaO could lower the melting temperature of the flux to decrease the flux viscosity.

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):  
Continuous Casting ◽  
Thin Slab ◽  
Slab Continuous Casting ◽  
Mould Flux

The Mould Flux Heat Conduction Performance Designing of High Carbon Steel for Thin Slab Continuous Casting

2014 ◽  
Vol 1033-1034 ◽  
pp. 1313-1316
Author(s):  
Hui Rong Li ◽  
Li Gen Sun ◽  
Li Qun Ai
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Carbon Steel ◽  
Continuous Casting ◽  
Orthogonal Experiment ◽  
High Carbon Steel ◽  
Thin Slab ◽  
High Carbon ◽  
Slab Continuous Casting ◽  
Mould Flux

Heat transfer of the mould flux between the mould and the strand is very complicated, especially for the high carbon steel thin slab continuous casting. In this research the orthogonal experiment has been carried out, and the results showed that: the effect for the heat flux form strong to weak is: R>Na2O>F>MgO>BaO. and in the experiment range, with the R increasing, when the R, Na2O content and the F- content are increasing, the heat flux would be decreasing; with the MgO content increasing, the crystallization temperature would getting fluctuant; with the BaO content increasing, the heat flux would getting fluctuant, when its content is around 6%, the heat flux is reach its summit.

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