氧化铝晶种分解能量传递过程的动态建模  

Dynamic modeling for energy transfer process in alumina precipitation

作　　者：刘征[1] 彭小奇[1,2] 

机构地区：[1]中南大学信息科学与工程学院,湖南长沙410083 [2]湖南第一师范学院信息科学与工程系,湖南长沙410205

出　　处：《中南大学学报（自然科学版）》2013年第3期1037-1042,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金重点资助项目(61134006)

摘　　要：建立描述拜耳法生产氧化铝工艺中晶种分解工序的单槽和串联槽的能量传递过程的动态机理模型。应用某氧化铝厂的实际生产过程数据对该模型进行仿真计算验证模型的可靠性和准确性。研究结果表明:该模型揭示了分解温度与其影响因素(过程变量及工艺参数)之间的关系,当已知生产条件和操作参数时,可应用该模型预测全工序各种分槽的晶种分解温度;当已知各个种分槽的最佳分解温度时,可应用该模型进行生产工艺允许条件约束下的多变量寻优,获取以最佳分解温度分布为控制目标的全工序生产操作优化决策。因此,该模型具有重要的理论意义和显著的实用价值。A dynamic model was proposed describing the energy transfer in continuous alumina trihydrate precipitation in the Bayer process.The accuracy and reliability of the model were proved by the simulation with actual process data from an alumina plant.The results show that the model can effectively describe the relationship between precipitation temperature and its influencing factors including process variables and parameters.If production condition and operation parameters are known,the model can be used to predict the temperatures in every precipitator.If the optimal precipitation temperatures in every precipitator are known,taking the optimal temperature as control objectives,the model can be used to optimize multiple variables to obtain the production operation optimization decision under the allowed constraints in precipitation.Therefore,the model is of important theoretical significance and remarkable practical value.

关 键 词：氧化铝 晶种分解 动态过程建模 非线性模型 

分 类 号：TF355[冶金工程—冶金机械及自动化]