结晶器振动装置有限元仿真分析

结晶器振动装置是炼钢连铸生产中的重要设备,通过论述结晶器振动装置整体建模、分析、结果评判的过程,介绍了一种大型设备的有限元分析方法,对设备的系统整体模态、静应力和位移、频率响应以及疲劳的有限元仿真分析有一定参考意义。     

方管结晶器爆炸成形过程数值模拟

对方管结晶器爆炸成形过程进行了实验研究并运用ANSYS软件中的LS-DYNA模块对成形过程进行了数值模拟,数值模拟结果与实验结果基本一致;在应用ANSYS/LS-DYNA软件对金属爆炸成形过程进行数值模拟时,对爆炸载荷的作用形式进行适当、合理的简化,并不改变基本结论;根据数值模拟结果获得了方管结晶器爆炸成形时的理论布药结构,当圆角部位药层厚度为直边部位药层厚度的1.75倍时可以获得最佳成形效果。     

板簧导向的单缸结晶器振动装置的分析与设计

介绍了单缸结晶器振动系统的组成,通过对该系统的动力学分析、动态静力分析,推导出该系统主要参数的计算公式,包括振动油缸的振幅、推力,板弹簧的变形反力及弹性销的计算和校核。     

板坯结晶器激光再制造技术

通过基材预处理、预热和激光熔覆工艺的优化设计,对多种熔覆粉末进行了对比性试验并制备相应的样件。通过对样件熔覆层的各种宏观现象和微观性能的测试分析,得出了大面积板坯结晶器激光熔覆的最佳熔覆粉末、熔覆工艺和工艺参数,为板坯结晶器的激光再制造提供了理论和实验依据。     

方坯结晶器内置式电磁搅拌的应用

本文对酒钢成套研发的结晶器内置式电磁搅拌装置的结构特点、性能参数及应用效果进行了综述。通过近几年的上线运行,各项性能指标优良。     

重轨钢大方坯角部纵裂的形成与控制

针对重轨钢生产中出现的角部纵裂,从结晶器精度、保护渣性能、浇铸温度、结晶器液面波动和工艺操作等因素对角部纵裂的形成进行了分析.研究表明:结晶器精度、保护渣性能不佳和操作不规范是导致角部纵裂发生的主要原因.通过加强结晶器的检查、改进保护渣性能、优化水口结构和规范操作等措施,能有效地控制重轨钢角部纵裂的发生.     

利用熔融结晶法进行苯甲酸的提纯

对苯甲酸的熔融结晶提纯进行了实验研究,探究国内外现有的熔融结晶器与自发明的翅片结晶器和板式结晶器的分离效果。实验结果表明,翅片结晶器和板式结晶器优于传统管式结晶器。并得到翅片结晶器和板式结晶器最优实验条件,使得产品纯度达到99.99%。     

铸坯振痕形成机理的研究

对目前各个铸坯振痕形成机理进行了简要的阐述，并对不同机理的优缺点进行了比较分析，进而提出了能很好解释生产过程中现象的振痕形成机理——振痕形成的温度波动机理；最后对发展前景进行了展望。     

THE NARROWING OF CRYSTAL SIZE DISTRIBUTIONS IN A SONICATOR-MSMPR CRYSTALLIZER SYSTEM

Obtaining small crystals of a narrow crystal size distribution is an important problem in many pharmaceutical, biotechnological, and ceramic processing applications. This paper describes the use of a two-stage system to reproducibly produce pilot-scale quantities of a ceramic precursor powder.

The population balance is used to determine the crystal size distributions obtained from a staged crystallization system. The staged crystallization system consists of two units, a mininucleator (sonicator) and an MSMPR crystallizer. Experimental and theoretical studies of this system showed that the use of the mininucleator leads to narrowing of the crystal size distribution obtained from the MSMPR crystallizer. The resulting expression for the population density distribution allows direct fitting of experimental log population density data from the second stage to determine the growth and nucleation kinetics for both the mininucleator and the MSMPR crystallizer     

DYNAMIC OPTIMAL CONTROL OF BATCH CRYSTALLIZATION PROCESSES

The estimation of the solids circulation rate in a dual fluidized bed gasifier is essential as it influences the gasification performance. However, such estimation requires experimental data input, which is often not available during the design phase of a fluidized bed. In this work, a correlation was developed based on literature and experimental data (from a cold model dual fluidized bed gasifier) to estimate the solids circulation rate at high solids-to-gas density ratios. The correlation was then validated with literature data from a dual fluidized bed steam gasifier under hot conditions, yielding maximum discrepancies of ±25%.