Copper remoral from molten iron sccap by nitrogen plasma frame

在本研究中，添加的N-D22-D2被研究成为nitrogen in the frame may promote copper removal in analogy to NH-D23-D2 decuprization。两种类型的等离子体，TIG弧和等离子体弧，已选定。等离子体电弧下的熔化铁的温度已被测量以确定精炼机制;铜集中在铁分解时，由于熔化时间增加，N-D22-D2被添加或不添加。Ar-H-D22-D-等离子体熔化后的尘埃中出现了两种粒子形态学。一种测量表面温度的方法被开发出来，以消除等离子体框架的干扰，并揭示出摩尔表面温度的分布。灰尘中的铜浓度之间的关系，而在大块中，铜去除的机制被计算为简单的蒸发。用等离子体电弧下的熔化方法进行比较，可以将铜移到比无真空蒸发低的水平。一些其他因素在从熔化铁中移除铜的机制中被讨论过。

In this research, the addition of NィイD22ィエD2 was studied because nitrogen in the frame may promote copper removal in analogy to NHィイD23ィエD2 decuprization. Two types of plasma, TIG-arc and plasma-arc, were selected. The temperature of molten iron under plasma arc was measured to clarify the refining mechanism.Copper concentration in iron decreased as the melting time increased, whether NィイD22ィエD2 was added or not. Ar-HィイD22ィエD2 plasma could decrease copper concentration than Ar-NィイD22ィエD2-HィイD22ィエD2 plasma could. Two kinds of morphology for the particles were obtained in the dust after plasma melting. A measuring method at the surface temperature molten iron was developed to avoid the interference from plasma frame, and to reveal temperature distribution of molten iron's surface.The relationship between Cu concentration in dust and that in the bulk was calculated assuming that the mechanism of copper removal is simple evaporation as Cu gas. Comparing with the experiment the melting under plasma arc could remove copper to a level lower than that by the vacuum free evaporation. Some other factors were discussed in the mechanism of copper removal from molten iron.