The effect of B2O3 additions on CaO-MgO-SiO2-Al2O3 based slag/flux was studied by many researchers. B2O3 addition helps in lowering the viscosity of slag which helps in eliminating the sticking of slag to ladle cover during refining of steel. It was found that B2O3 can be used as a replacement to conventional CaF2. But what will be the effect of B2O3 addition on slag line erosion and inclusions in steel.
Hello,
You may check the article below;
Article Effect of Ladle Slag Modification on Slag Sticking to Snorke...
The study is not directly related with the ladle refractory but they have found that compared to CaF2, the erosion on snorkel refractory of CAS-OB increased with the addition of B2O3 within the same amount.
But the process parameters like the addition sequence in process route, chemical composition of slag, processing temperatures, the physical and chemical stability of refractories on slag line will effect erosion level and also B pick-up ratio. Thus, I think it is better to compare these specific conditions with using computational thermodynamic software; FactSage, ThermoCalc, etc.
If B2O3 is not stable, it may cause increase of B in the liquid metal and that will cause serious effect on mechanical properties of final steel.
Ashok Kamaraj you are right. boron may be reduced from B2O3 in slag by silicon present in low carbon steel... but i think chances of boron recovery into steel are very less..
Ashok Kamaraj yes it depends on steel composition.that part we are taking care..our concern is about effect on refractory..if there is any literature regarding this kindly share...
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