摘要:
连铸过程中, 将耐材质吸附杆经塞棒插入到浸入式水口内, 吸附流经水口的夹杂物, 可提高钢水洁净度。通过高温热态试验, 分析了凹槽深度、凹槽方向和凹槽个数等多因素影响下吸附杆的吸附能力。结果表明:不同结构吸附杆对钢液中不同尺寸级别夹杂物化学吸附作用不同, 当凹槽深度、凹槽方向、凹槽个数共同作用时, 对于<5μm、1020μm夹杂物, 凹槽个数为3个, 凹槽深度为2 mm, 凹槽平行于旋转方向, 且夹杂物位于试样中部时去除效果最佳;对于510μm、>20μm夹杂物, 凹槽个数为3个, 凹槽深度为2 mm, 凹槽平行于旋转方向, 且夹杂物位于试样边部时去除效果最佳。同一结构下, 吸附杆凹槽平行旋转方向时更有利于钢液中不同尺寸级别夹杂物的化学吸附。试验为洁净钢冶炼提供了数据支撑, 具有一定的指导意义。
关键词:
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连铸 /
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水口 /
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夹杂物 /
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吸附杆 /
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凹槽
Abstract:
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.
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