摘要:
高炉是钒钛磁铁矿最成熟的冶炼方法,但高炉冶炼钒钛磁铁矿需要配加普通矿,炉渣TiO2低难以回收利用。为了实现全钒钛磁铁矿冶炼,提出了钒钛磁铁矿回转窑预还原—全氧熔池熔炼新技术,该技术具有工艺流程短,炉渣氧势可控,冶炼能耗低等优点。试验研究了温度和炉渣碱度对钒钛磁铁矿熔炼的影响规律,结果表明:在熔炼温度1 450℃以上,全钒钛磁铁矿冶炼在技术上是可行的,钒钛磁铁矿终渣碱度为0.8以上可以顺利冶炼得到铁水,炉渣流动性好,渣铁容易分离,但铁水硫含量高于0.21%,达不到炼钢要求,需要炼铁预处理脱硫后才能炼钢。
Abstract:
Blast furnace is the most mature way to smelt vanadium tatino-magnetite,but the smelting of vanadium titano-magnetite in blast furnace needs to be added with ordinary ore and the TiO2 content in slag is too low to be used. In order to achieve full vanadium tatino-magnetite smelting,a new rotary kiln pre reduction and full oxygen bath smelting process is put forward in this paper. The technology has the advantages of short process flow,controllable slag oxygen potential and low energy consumption.The influence of temperature and slag basicity on the smelting is studied.The results show that the vanadium tatinomagnetite smelted by full bath smelting process is feasible when the smelting temperature is above 1 450℃ and the slag basicity is more than 0.8.The fluidity of the slag is good,and the iron is easily separated from slag.But the sulfur content of liquid iron is higher than 0.21%,which can not reach the requirements of steelmaking.It must be desulfurization before steelmaking.
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