【作者】 都兴红； 刘慧； 牛亚慧； 娄太平； 付念新；

【Author】 Du Xinghong~*,Liu Hui,Niu Yahui,Lou Taiping,Fu Nianxin(School of Materials and Metallurgy,Northeastern University,Shenyang 110004,China)

【机构】 东北大学材料与冶金学院；

【摘要】 通过XRD,TG-DTA等手段,讨论了蛇纹石的热分解过程以及NiO的碳热还原反应机理,研究了温度对蛇纹石中NiO还原过程的影响。研究表明,蛇纹石在受热后会脱去结晶水分解为镁橄榄石和顽火辉石,体系中的氧化镍除了能被固体碳还原,还能被CO和H₂还原,2NiO·SiO₂首先分解为简单氧化物NiO和SiO₂,其还原温度比纯NiO高。当配碳量为5%时,最佳还原温度为1100℃。更多还原

【Abstract】 The thermal decomposition process of serpentine and the mechanism of carbon thermal- reduction of NiO in it were discussed by XRD and TG-DTA etc.The effect of temperature on the reduction of nickel component in serpentine was studied. After being heated,the crystal water had been released and serpentine decomposed into forsterite and enstatite.Not only solid carbon but also CO and H₂ could reduce the nickel oxide in this system.2NiO·SiO₂ was decomposed into NiO and SiO₂ first,and the reduction temperature of it was higher than pure NiO.The optimum reduction temperature of serpentine containing nickel was 1100℃when carbon ratio was 5%（mass fraction）.更多还原