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一、利用现状铸锭前的钢水,温度约1550℃,每公斤的热焓(q_m)为1382千焦左右,其中显热1088千焦,凝固潜热293千焦。钢锭开坯温度,一般为1200℃,其热焓(q_b)仅为8370千焦上下。q_m-q_b=544千焦/公斤。钢锭铸后经历静置、脱模、运送、装炉等工序,要损失热量。主要是模具(包括铸管、底盘等)吸热(q_t)和向大气散热(q_d),在一定条件下q_t值比较固定,q_d则随钢锭单重大小及传搁时间(T.T)长短和散热条件等因素的变化而变化。如单重大,T.T短,则
First, the use of the status quo before the molten steel, the temperature of about 1550 ℃, enthalpy per kilogram (q_m) of about 1382 kilocalories, of which 1088 kiloton heat, latent heat of 293 kcal. Ingot billet temperature, usually 1200 ℃, the enthalpy (q_b) only 8370 kJ up and down. q_m-q_b = 544 kJ / kg. After ingot casting experience static, demoulding, shipping, loading and other processes, to lose heat. (Q_t) and q_d to the atmosphere (q_t) under certain conditions, q_t value is relatively constant, q_d with the single size of ingot and transfer time (TT) length and heat dissipation Conditions and other factors change. Such as single heavy, T. T short, then