Abstract：It was found by water modeling study that there are mainly three types of mold powder entrapment in slab continuous casting, i.e., the entrapment caused by the shearing flow near the narrow face of the mold, the entrapment caused by vortexes in regions around the submerged entry nozzle (SEN) and the entrapment caused by the disturbing action of the Ar bubbles on the interface between liquid steel and mold powder. Both the velocity of the surface flow and the level fluctuation in the mold are enlarged with increasing the casting speed, reducing the submerged depth of SEN, decreasing the downward angles of the nozzle outlets and increasing the Ar flow rate, of all which increase the tendency of the mold powder entrapment. Among the 4 above mentioned factors, increasing casting speed has the largest effect on mold powder entrapment. It was found that, when 1.4 m/min of casting speed was used for slab of 1900 mm width, the velocity of surface flow and the level fluctuation in the mold could be well controlled to prevent and reduce the mold powder entrapment when 25° of the downward angles of the SEN outlets, 250 mm of submerged depth of SEN and 10 L/min of Ar flow rate were used in the experiment.
陆巧彤;杨荣光;王新华;张炯明;王万军. 板坯连铸结晶器保护渣卷渣及其影响因素的研究[J]. 钢铁, 2006, 41(7): 0-0.
LU Qiaotong;YANG Rongguang;WANG Xinhua;ZHANG Jiongming;WANG Wanjun. Water Modeling Study on Factors Affecting the Mold Powder Entrapment in Slab Continuous Casting. Iron and Steel, 2006, 41(7): 0-0.
2006, Vol. 41 