【摘要】 在对高导电率材料提纯过程中引入无接触电磁约束熔炼技术,可以避免熔体与坩埚接触,有效地阻止坩埚带来的杂质污染.从熔体局部径向压强平衡方程出发,提出电磁约束压强的概念和计算方法,通过模拟计算确定熔体外部形状.使用自制水冷铜坩埚,以铝为原料,在大气条件下实现了无接触电磁约束熔炼实验.结果表明被约束的熔体外部形状与计算结果相符,说明所提出电磁约束压强的计算方法是正确的.更多还原

【Abstract】 Non-contact electromagnetic confinement is applied in purification of high purity materials.Melted materials with good conductivity can be kept non-contact with the crucible,which could effectively avoid the pollution by impurities in the crucible.Based on the local radial pressure equilibrium formulas,the conception of electromagnetic confinement pressure and the method for calculating the pressure were presented.Thus the surface shape of melt could be determinated via simulation.The experiment using aluminum bulk was conducted under atmospheric condition,with the cold copper crucible designed by ourselves.The result of the experiment shows consistency between the shape of melt in experiment and calculation,which verifies the correctness of the calculation of the pressure.更多还原