论文部分内容阅读
在利用高质量铜米和废旧铜线生产无氧铜时,为了提高废旧铜线的利用率,本文通过在熔炼过程中添加铜稀土中间合金作为精炼剂,添加铜硼和铜镁中间合金作为脱氧剂,分析了Cu-RE-B-Mg合金的净化作用及其对铸造组织的影响,并研究了除杂净化机理。结果表明,铜稀土中间合金可显著降低无氧铜中Zn、Pb、Al、S、Fe等杂质含量;铜硼和铜镁中间合金使无氧铜的含氧量降低至24 ppm,达到了低于30 ppm的要求;此外,由于少量残留的稀土铜化合物可作为形核的核心,精炼剂还具有细化晶粒的作用。
In the use of high-quality copper and copper scrap copper production of oxygen-free copper, in order to improve the utilization of scrap copper, the paper by adding copper rare earth master alloy refining process as refining agent, add copper boron and copper-magnesium master alloy as deoxidation The purifying effect of Cu-RE-B-Mg alloy and its influence on the casting structure were analyzed. The mechanism of impurity removal and purification was also studied. The results show that the content of Zn, Pb, Al, S, Fe and other impurities in copper-free rare earth can be significantly reduced by copper rare earth master alloy. The content of oxygen free copper reduced to 24 ppm, At 30 ppm. In addition, the refining agent has the function of grain refinement because a small amount of residual rare earth copper compound can be used as the core of nucleation.