260t顶底复吹转炉喷溅特征的水模型研究和应用

Study of Water Model on Splashing Characteristics of 260 t Top and Bottom Combined Blown Converter and Application

以260 t转炉为对象,通过几何相似比1∶7水模型研究了供气流量和枪位对炉口、耳轴以及炉壁喷溅量的影响。结果表明:喷溅量的多少与冲击坑的大小存在直接关系,冲击坑越大越深,则喷溅量越大;炉口喷溅量、耳轴喷溅量以及炉壁喷溅量均与吹气流量密切相关,并且随流量的增大呈指数增长;三类喷溅量随枪位升高先增大后减小,在枪位H=40de(氧枪喷孔直径)时达到最大值。生产应用表明,260 t转炉用5孔氧枪对应的拉碳枪位在2.1~2.2 m,吹炼枪位和前期化渣枪位可分别为2.5 m和2.8 m时可避免明显喷溅。

Taking 260 t converter as the object,the effect of lance height and gas flow rate on splashing quantities at furnace mouth,trunnion and wall has been stndied by 1∶7 geometrically similar water model.The results show that the amount of splash is directly related to the size of the cavity.The amount of splash increases with the increase of the cavity.The splashing amount of furnace mouth,trunnion and wall is closely related to blowing flow,and increases exponentially with the increase of blowing flow.The three kinds of splash increase first and then decrease with the increase of lance height,and reach the maximum as the lance height H is equal to 40de(lance nozzle diamter).The production application of 260 t converter shows that,with the five-nozzles lance height in catch carbon process being 2.1~2.2 m,and the lance position in blowing process and the slag melting process being 2.5 m and 2.8 m respectively,the obious splashing is avoided.