提钒转炉溅渣护炉试验研究

Experimental study on slag splashing with modified vanadium slag

溅渣是提高转炉炉龄最有效的技术,但由于钒渣与钢渣成分差异较大,溅渣护炉技术尚未在提钒转炉上得到应用。为解决提钒转炉炉衬侵蚀严重的问题,对改性钒渣溅渣进行了研究。结果表明,通过改性可以达到调整钒渣状态的目的。改性后的钒渣具有良好的溅渣性能,溅渣后炉厚增加10 mm以上。改性钒渣中w(CaO)可控制在3%以下,对钒渣和半钢的质量影响不明显,渣中TFe含量大大降低,有利于降低提钒过程中的铁损。

Slag splashing is the most effective technology to improve the furnace campaign of converter.However,due to the great difference of composition between the vanadium slag and the steel slag,the technology has not been applied in the vanadium extraction converter.In order to solve the serious problem of lining erosion in vanadium extraction converter,slag splashing with modified vanadium slag was studied.The results showed that the purpose of adjusting the state of vanadium slag could be achieved through the modification.The modified slag had good slag splashing performance.After slag splashing,the thickness of the furnace was increased by more than 10 mm.The mass fraction of CaO in the modified vanadium slag could be controlled less than 3%,and the quality of vanadium slag and semi-steel was not obviously affected.The TFe content in the slag was greatly reduced,which was beneficial to reduce the iron loss in the vanadium extraction process.