DMF铁矿粉在含铬型钒钛混合料烧结中的应用

对一种低品位廉价赤铁粉(DMF粉)配加在含铬型钒钛混合料中烧结的可行性进行了研究.通过微型烧结装置和熔点测定仪对DMF粉的液相流动性和溶化特性进行了分析.结果表明,DMF粉液相流动性好,液相开始生成温度ts及有效液相终止温度tf较低,溶化区间t较宽,溶化时间τm充分,安全液相量的生成速度较小(0.125 mm/min),可弥补含铬型钒钛烧结矿液相量的不足,实现优化配矿.烧结杯实验结果表明,配加10%DMF粉的含铬型钒钛烧结矿各项指标均较好,且有利于高炉的稳定顺行.

Application of DMF Ore for Sintering of Cr-Bearing Vanadium and Titanium Magnetite

Low grade and cheap hematite ore (DMF) was researched for sintering of Cr-bearing vanadium and titanium magnetite (V-Ti-Cr) via sessile drop measuring setup， miniature sintering setup and sintering pot tests. The results showed that DMF has a good fluidity with a wide melting range， a long melting time， and the beginning and ending temperature that liquid generated are low along with a small value of security liquid velocity (0.125mm/min). Therefore， DMF can be used as a matching ore in V-Ti-Cr mixture to make up the disadvantage that V-Ti-Cr sinter owns an insufficient liquid content. Sinter pot tests showed that the optimal additive ratio of DMF is 10%， which is helpful to stabilize the blast furnace operation.