富铁相形态对电磁净化效率的影响

Effect of the Shape of Iron-rich Phase on Electromagnetic Separation Efficiency

研究了Al-2％Fe初生富铁相形貌的改变对电磁分离效率的影响。以Mn作为变质剂来改变富铁相形态，当摩尔比Mn／Fe=1．3～1．5时，富铁相由针状转变为规则的块状或球状。分别在变质前后进行电磁分离试验，并且分析了试样不同部位的微观组织，试验表明：变质后，富铁相的形貌有利于在熔体中迁移，并且电磁净化的效率比变质前提高了20％，可达到90％以上。

In this paper, the effect of the shape of Al-2% Fe primary iron-rich phase on electromagnetic separation efficiency is studied. By altering the shape of iron-rich by adding the Mn, it is found that the long nee-like iron- rich phase changes into piece or sphere when Mn/Fe is 1.3-1.5（molar ratio）. Based on the experiments with Mn and without Mn respectively, the different positional microstructures of samples are analyzed. The experimental results show that the shape of iron-rich is easy to migrate in the A1 melt after metamorphosing. And electromagnetic separation efficiency enhances 20 % than that without metamorphosing under equivalent condition, up to more than 90%.