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采用HSC Chemistry 6.0热力学分析软件,结合相关数据手册和文献资料,对红土镍矿电炉还原熔炼镍铁合金过程进行热力学分析,同时研究了炉内气氛的选择。热力学研究表明:红土镍矿电炉还原分为分解和还原两个过程,在分解过程中,红土镍矿中各矿物的分解先后顺序为针铁矿>蛇纹石>滑石>镁橄榄石;而在还原过程中,红土镍矿中各氧化物的还原先后顺序为Fe2O3>NiO>Fe3O4>FeO>SiO2>CaO。此外,熔炼温度在1673～1873 K条件下,炉内CO的含量分别为>75.4%和>77.2%。
Thermodynamic analysis software of HSC Chemistry 6.0 was used in combination with relevant data manual and literature data to analyze the thermodynamics of Ni-Fe alloy in the laterite nickel ore electric furnace and the choice of atmosphere in the furnace. Thermodynamic studies show that the reduction of electric furnace in lateritic nickel ore is divided into two processes: decomposition and reduction. During the decomposition process, the order of decomposition of minerals in lateritic nickel ore is goethite> serpentine> talc> forsterite. During the reduction process, the order of reduction of oxides in lateritic nickel ore is Fe2O3> NiO> Fe3O4> FeO> SiO2> CaO. In addition, the melting temperature in the 1673 ~ 1873 K conditions, the CO content of the furnace were> 75.4% and> 77.2%.