Study on Adsorption Capacity of Adsorption Bar under Multi-factors

The refractory absorption bar is inserted into the submersed nozzle by stopper to absorb the inclusion flowing through the nozzle and the cleanness of liquid steel during the continuous casting process can be improved. The influence of the depth of groove,the direction of rotation and the number of grooves on the adsorption capacity of absorption bar was analyzed by high temperature thermal experiment. The results show: Adsorption bars of different structures have different chemical adsorption effects on inclusions of different sizes in molten steel. When the selection of groove depth,groove direction and groove number are combined,for the ＜5 μm,10 ~20 μm inclusions,the absorption bar has the best removal effect when the number of grooves is 3,the groove depth is 2 mm the groove is parallel to the rotation direction,and the inclusions are located in the middle of the sample. For the 5 ~10 μm,＞ 20 μm inclusions,the absorption bar has the best removal effect when the number of grooves is 3,the groove depth is 2 mm,the groove is parallel to the rotation direction,and the inclusions are located in the edge of the sample.Under the same structure,the chemical adsorption of inclusions of different sizes in molten steel is more favorable when the groove of the absorption bar is in parallel rotating direction. This experiment has provided data support for smelting clean steel.