基础特性对含铬型钒钛烧结矿粉化性能的影响

摘要 承德地区含铬型钒钛烧结矿的黏结相不充分、强度差、低温还原粉化指数低，严重影响烧结矿的质量.研究了4种不同成分的含铬型钒钛磁铁精矿粉的烧结基础特性:连晶强度、黏结相强度、液相流动性、同化温度，并与4种铁精矿粉的单烧实验结果进行比较分析，探究含铬型钒钛磁铁精矿粉基础特性对烧结矿低温还原粉化指数RDI+3.15的影响规律.结果表明:含铬型钒钛磁铁烧结矿的RDI+3.15随铁精矿粉同化温度的上升而降低，随黏结相强度的上升而升高，液相流动性和连晶强度对其影响很小.
Abstract：The content of binding phase in Cr-bearing vanadium and titanium magnetite is insufficient， which makes the sintering strength and low temperature reduction degradation index (RDI) bad. The sintering basic characteristics， i.e.， crystal intensity， self-intensity of adhere phase， fluidity of liquid phase， assimilation temperature， were studied in four kinds of Cr-bearing vanadium and titanium magnetites， which were compared with the single burning test results of four kinds of iron ore concentrate， to explore the effect of the sintering basic characteristics on RDI+3.15. The results showed that the RDI+3.15 of sinter decreases with increasing the assimilation temperature， and increases with increasing the strength of binding phase， but the fluidity of liquid phase and crystal intensity have little influence on it.