转炉烟尘制备氮化铁磁粉的研究

Research on the preparation of iron nitride powder from revolving furnace sludge

转炉烟尘通过湿法(硫酸和氨水)冶金提纯净化、高能球磨处理后,在NH3/H2气氛下进行还原氮化,以穆斯堡尔谱学、X光衍射等方法对处理试样进行物相分析。结果表明,Ar气氛下球磨2h后,经550℃/2h还原、550℃/3h氮化(NH3/H2=3/4,降温时NH3/H2=1/6)处理,γ-′Fe4N的生成量≥91%。

After purifying and milling the revolving furnace sludge were nitrided at NH3/H2 atmosphere. The phase structure for nitrogen specimens were checked by Mossbauer spectroscopy and X-ray diffraction,etc. The results show that at following conditions ; milling for 2h in Ar gas,reducing at temperature of 550℃ for 2h,nitriding at 550℃ for 3h in NH3/H2 atmosphere, the γ＇-Fe4N magnetic powder can be synthesize, the content 91%.