圓坯連鑄凝固傳熱數(shù)學模型及應(yīng)用

Math Model for Solidification Heat-transfer in Continuous Casting of Round Bloom and Application

摘要: 建立了Φ400 mm大斷面圓坯連鑄凝固傳熱的數(shù)學模型。應(yīng)用該模型計算了過熱度、拉速以及冷卻強度等因素對鑄坯溫度、坯殼厚度、凝固終點的影響,為現(xiàn)場生產(chǎn)確定了合理的二冷工藝參數(shù)。生產(chǎn)實踐證明,當生產(chǎn)Φ400 mm鑄坯的拉速達到0.4~0.6m/min時,自動控制的二次冷卻制度滿足工業(yè)連鑄要求,可得到優(yōu)質(zhì)鑄坯。

Abstract: The math model for solidification heat-transfer in continuous casting of Φ400 mm round bloom is established.It has been used to make calculation concerning the influences by elements as degree of superheat,withdrawal speed and cooling intensity on bloom temperature,shell thickness and solidification end-point,and thus proper process parameters of secondary cooling for actual site operation are determined.Relevant operation practice has demonstrated that in case of casting Φ400 mm round bloom,with a withdrawal speed up to 0.4~0.6 m/min,the automatically-controlled secondary cooling schedule is satisfactory to the requirements for commercial production of quality blooms.