磁场诱导下Fe3S4向FeS2转化速率的增加

摘要

The formation of FeS2 from a Fe3S4 precursor in the external magnetic field strength of 0.2～0.4 T has been experimentally examined. In the reaction system of FeCl3-CH4N2S at 170 ℃, the conversion rate of Fe3S4 to FeS2 was found to be magnetic field strength dependent. The sulfidation of Fe3S4 may proceed via dissolution and precipitation mechanism, the presence of an external magnetic field could promote the mass transport process and then accelerate the dissolution and crystallization processes, resulting in faster conversion rate of Fe3S4 to FeS2than that in the absence of an applied magnetic field.%以FeCl3和CH4N2S为主要原料,在0.2～0.4 T的外加磁场强度下,温度为170℃的反应体系中研究了磁场对前驱物Fe3S4转化成FeS2过程的影响.结果表明,Fe3S4到FeS2的转化率是与磁场强度有关的.Fe3S4的硫化过程可能是通过溶解-再结晶机理.外加磁场的存在可以促进物质的传输过程,从而加速前驱物的溶解和再结晶过程,导致和没有外加磁场相比Fe3S4到FeS2的转化率的增加.