新型W-Fe-Sn复合助熔剂研制、表征及应用

Development , characterization and application of novel“ W-Fe-Sn”composite flux

研制和表征了一种可用于铁矿石中硫含量测定的新型W-Fe-Sn复合助熔剂。新型复合助熔剂中掺杂了少量Sn和其他有效成分,使得铁矿石样品在测定时充分燃烧,气体释放完全。X射线衍射衍(XRD)结果表明,新型复合助熔剂在烧结过程中形成了新的Fe7W6合金。通过多次实验,对新型助熔剂的种类、用量及样品用量等实验条件进行了优化选择,并和传统的W+Fe助熔剂分析结果进行了比对。结果表明,利用高频燃烧红外吸收光谱法(HFIR)测定铁矿石中硫的含量时,采用新型复合助熔剂操作简便、分析流程短,并且铁矿石样品燃烧完全,测定结果精密度好且认定致值一致。

A novel W-Fe-Sn composite flux was developed and characterized for the determination of sulfur content in iron ore.A little Sn and other effective components were mixed into novel composite flux,so that the iron ore sample could be fully combusted during determination and the release of gases was to be complete.The X-ray diffraction（XRD） results showed that,a new Fe7W6alloy was formed during the sintering of this novel composite flux.The experimental conditions,such as the type and dosage of novel composite flux,and the dosage of sample,were optimized by experiments.The analytical results were compared with the conventional W＋Fe flux.The results showed that,when the content of sulfur in iron ore was determined by novel composite flux and high frequency combustion infrared absorption spectroscopy（HFIR）,the operation was simple and the analytical procedure was short.Moreover,the combustion of iron ore sample was complete.The precision was high,and the determination results were consistent with the certified values.