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水钢采用低比例的钒钛矿高炉炼铁,获得含有钒钛等微量元素的铁水,其性质既不同于一般铁水,也不同于高钒钛铁水,为了弄清这些微量元素对转炉炼钢工艺的影响,分析了钒钛钢渣的物相、熔化性,用高频感应炉模拟转炉吹炼过程并结合生产试验得知:1)普通铁水的碳焰温度为1 370～1 400℃,水钢铁水的碳焰温度为1 400～1 430℃,比普通铁水高约30℃;2)在较小的供氧速度下,铁水中的钛、硅、锰可与碳分阶段氧化;3)含有TiO2炉渣的发泡能力、储泡能力强于不含TiO2的炉渣,炉渣中的CO反应性气泡使炉渣的发泡更加严重;4)在转炉吹炼前中期,炉渣中过高的FeO、较低的碱度,炉渣中大量的C-FeO反应,以及含有TiO2炉渣的储泡性质,是喷溅的主要原因。
In the steelmaking process, a low proportion of vanadium-titanium blast furnace ironmaking is used to obtain hot metal containing trace elements such as vanadium and titanium. The properties of molten iron are different from those of common molten iron and high vanadium titanium molten iron. To clarify the effect of these trace elements on the converter steelmaking process , The phase and melting property of vanadium-titanium steel slag were analyzed. The converter blowing process was simulated by high-frequency induction furnace and the production test showed that: 1) The carbon flame temperature of ordinary molten iron was 1 370 ~ 1 400 ℃, The carbon flame temperature of water is 1,400-1,430 ℃, which is about 30 ℃ higher than that of ordinary hot metal; 2) the titanium, silicon and manganese in molten iron can be oxidized in stages with carbon at a small oxygen supply rate; 3) The foaming ability of TiO2 slag is better than that of the slag without TiO2. The CO reactive bubbles in the slag make the foaming of the slag more serious. 4) The excessive FeO in the slag before and after the converter blowing Low alkalinity, large amounts of C-FeO in the slag, and foam properties that contain TiO2 slag are the main causes of splashing.