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采用水气二次冷却方法,可以提高连铸坯质量和扩大连铸机铸钢品种。因为水气冷却时的热交换强度取决于冷却剂的三个参数,即喷水密度,水气混合物流速和水雾粒度。实际上选择最佳参数困难,所以有必要取得冷却剂状态的综合参数。该参数值决定着水气冷却时的热交换强度。此参数可看作是水气混合物一个单位容积里的雾化水比面。若将水气混合物看作单湿剂,比面即可确定为
The use of water and gas secondary cooling method, can improve the quality of continuous casting billet and expand the cast steel varieties. Because the intensity of the heat exchange when the water is cooled depends on the three parameters of the coolant, namely the spray water density, the flow velocity of the water vapor mixture and the water mist particle size. In fact it is difficult to choose the best parameter, so it is necessary to obtain the comprehensive parameter of the coolant state. The value of this parameter determines the intensity of heat exchange when water vapor cools. This parameter can be seen as water vapor mixture of a unit volume of atomized water than the surface. If the water vapor mixture as a single wet agent, than the surface can be identified as