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通过对钢包自开的原理进行理论分析,显示钢水冻结层和渗透层厚度是影响钢包自开率的主要因素。结合工厂实际情况,采用硅铬质引流砂,研究了影响同侧放钢时钢包自开率的主要因素:放钢时出钢口与钢包水口的位置关系、引流砂中的钠长石及石墨含量等。通过将出钢口左侧偏离中心角6°,引流砂中的石墨外加量调至2%,钠长石外加量调至0.75%～1%,钢包自开率能稳定在95%左右。
Through the theoretical analysis of the principle of ladle self-opening, it shows that the thickness of frozen layer and infiltration layer of molten steel are the main factors that affect the ladle self-opening rate. According to the actual situation of the factory, the main factors affecting the self-opening rate of ladle during the same-side tapping process were studied by using siliceous chromated sand. The relationship between tapping opening and ladle nozzle during steels discharge, albite and graphite Content and so on. By shifting the left side of the tapping hole 6 ° away from the central angle, the amount of graphite in the drainage sand is adjusted to 2%, the amount of albite added to 0.75% -1%, and the ladle open rate can be stabilized at about 95%.