Wear Rate of Fused Silica Submerged Nozzle for Continuous Casting
1987 Volume 73 Issue 9 Pages 1133-1137
Details
1987 Volume 73 Issue 9 Pages 1133-1137
In order to estimate the wear rate and the campaign life of fused silica submerged nozzle for continuous casting of Mn steel, investigations were made of used nozzle retrieved from actual continuous casting machine and laboratory corrosion test of fused silica refractories in molten steel with various Mn concentration.
As a result, it was found that the wear rate was proportional to the difference between bulk Mn concentration and equilibrium Mn concentration, and flow velocity of molten steel through the nozzle.
The wear rate is expressed as follows;
υ (cm/min)= 0.46 (4.5×10-2U+1.2){13.9 ([Mn]0-[Mn]e) + 1.1} × 10-3
where U is flow velocity of molten steel through the nozzle(cm/min), [Mn]0 is bulk Mn concentration in steel, and [Mn]e is equilibrium Mn concentration for the reduction reaction of SiO2 by Mn in steel.
