摘要:
在实验室条件下对钒钛磁铁矿金属化球团的熔分进行了研究, 利用Factsage软件计算了不同碱度配比下的三元渣相图, 并考察了熔分温度、熔分时间、球团碱度对熔分效果、铁回收率和最大粒铁质量的影响。结果表明, 适当的升高熔分温度可以有效提高铁回收率和渣铁分离效果;随球团碱度的增加, 铁回收率呈现先升高后降低的趋势;熔分时间超过40 min后, 铁回收率出现了略微的降低。当熔分温度为1 550℃, 球团碱度为1.0, 熔分时间为40 min时, 铁回收率达到了93.17%, 最大粒铁质量达到了24.16 g, 渣铁分离效果良好。
Abstract:
The smelting-separation process for metallized pellets of vanadium-titanium magnetite was studied in the lab.The ternary phase diagram of slag was calculated under various basicity by using Factsage software and the influences of smelting temperature,smelting time and the basicity of the metallized pellet on the results of slag-iron separation,iron recovery ratio and the quality of biggest nugget were investigated.The results demonstrate that increasing smelting temperature at an appropriate extent can improve the iron recovery ratio and is beneficial for slag-iron separation.With the increase of the basicity of the metallized pellet,the iron recovery ratio increases firstly and then descends.The iron recovery ratio increases with the rise of smelting time,but the iron recovery ratio slightly reduces after 40 min.The optimal conditions are 1 550 ℃,R = 1. 0,40 min. Under this conditions,the iron recovery ratio reaches 93. 17% and the quality of biggest nugget reaches 24.16 g with very good slag-iron separation.
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