钢包热循环过程热状态的数学模拟-冶金工程专业论文.docxVIP

重庆大学硕士学位论文 重庆大学硕士学位论文 摘 要 摘 要 本论文分别为钢包系统中的钢包本体、渣层和包盖建立了相应的传热 数学模型，采用有限差分法建立了求解温度场的代数方程组，采用独特的 方法为钢包净空部分内表面之间的辐射换热建立了换热代数方程组，并为 建模和求解过程编制了计算机程序，形成了完整的钢包热行为模拟计算软 件；进行了钢包热行为试验研究，为模拟软件确定了初始运行条件，并验 证了模拟结果的准确性。 本模拟软件的主要功能包括：通过输入相应的初始条件，就可以对不 同类别的钢包在各种工艺运行条件下的热行为进行数值模拟，得到任何时 刻热循环过程钢包温度分布和热容量、以及盛钢过程钢水温度的输出结果。 运用模拟计算结果，分析讨论了各种因素对热循环过程钢包热状态及的盛 钢过程钢水温度变化的影响，找出了主要影响因素及其规律：在影响钢包 热状态及盛钢期间钢水温度变化的因素中，空包时间和加盖的作用最明显， 其次是钢包的隔热保温和出钢前钢包的烘烤情况，现行生产条件下的渣层 厚度和包衬工作层厚度作用不明显。 ，^ 关键词：钢包，钢水0温度，数学模拟，数学模型 妻塞盔篷堡主鲎燕鎏壅 妻塞盔篷堡主鲎燕鎏壅 燕 塞 Abstract In allusion to the problem of large variation range of the factors affecting On ladle hot states in production cycles，the ladle hot behavior in production cycles was mathematically simulated by the finite difference method and the ’ eriects ofdif＆rent kind ofinfluencing factors on ladles hot behavior were啦l氆醚． Because of radiat symmetry of heat transfer,the conduction mathematical model of two-dimensional circular cylindrical coordinates was adcIpted for mathematical modeling ofladle thermalhaviors．Diseretization ofthe modeling district was treated with the interual node method,and boundary heat transfer with the third boundary COndition,COmbined coupling derivation with radiant network equations in the iadle internal surfaces not contacted with molten steel． During filling molten steel,the heat behavior of molten steel was treated with energy．balance method．In heat transfer simulating of the slag layer,the latent heat of stag was treated with sensible thermal capacity method．By structuring program Turbo C，the ladle heat transfer modeling was programmed to computer procedure The procedure was divided into four modules that executed individually different operation functions，in order to program debugging and maintaining From the data of ladle production parameters collected from 445 ladle times in production cycles，the mean operating time ofeach working process, whic