锌渣生成动力学及净化条件下锌浴中锌渣分布演变规律的基础研究

热镀锌液中的锌渣是影响镀锌板表面质量的最重要因素，由锌渣引起的各种缺陷造成了巨大的经济损失。为了探索具有工业应用前景的新型金属熔体净化工艺，针对连续热镀锌生产过程中的锌液电磁净化，在系统研究热镀锌液和锌渣相的相关物理性能的基础上，考察其对锌渣电磁分离效率的影响规律及作用机理。通过锌渣相生成动力学过程的研究，揭示锌渣生成速率的变化规律。通过数值模拟研究净化条件下锌锅内锌液温度场、流场和浓度场，建立锌渣生成与去除的数学模型，探讨电磁净化对热镀锌锅内锌渣分布演化的影响规律，为热镀锌液电磁净化技术的工业应用提供理论指导。

The most important factor that impairs the surface quality of the hot dip galvanizing steel sheet is the dross defect, causing a dramatic economical loss.In order to study the promised liquid metal purification technology for industrial use, this project focuses on the zinc bath prufication during the continuous hot-dip galvanizing process.The physical properties of zinc dross and its effects on the zinc bath purification efficiency was investigated systematically.The laws of zinc dross formation was analyzed through the kinetics study. By means of numerical simulation of industrial zinc pot, the change laws of velocity field, temperature field and concentration field of zinc dross were studied when the zinc melts pumped out the zinc pot,a mathmatical model of zinc dross formation and separation was founded. The influences of electromagnetic purification on the zinc dross disrtibution in the zinc pot was studied.Hopefully, all of these.investigations can provided experimental and theoretical basis for hot-dip galvanizing electromagnetic purification technology applied in industry.