顶吹搅拌对不锈钢渣中铬回收的影响
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摘要
在不锈钢钢包中开展顶吹氮气搅拌工艺试验,研究了顶吹搅拌的流量、时间以及钢液初始温度三个参数对炉渣中铬元素还原程度的影响,结果表明:顶吹搅拌可大幅提高炉渣中铬元素的还原程度,经10 min顶吹搅拌可降低至0.97%,已接近实验室条件下的w(Cr_2O_3)为0.7%。生产实践中在顶吹氮气搅拌时间为10 min,流量为300 L/min,钢液初始温度为1 475℃的条件下,炉渣中w(Cr_2O_3)平均值为0.87%,满足生产中对铬回收的要求。
The top blowing experiment is carried out in the stainless steel ladle. Parameter settings of blowing flow rate,duration and initial temperature on the effect of reducibility chromic oxide in the slag are studied. The result show that top blowing can substantially increase the reducibility of chromic oxide in the slag and the chromic oxide content is decreased to 0.97% after 10 min, which is approaching to chromic oxide contnet 0.7% under laboratory conditions. In actual production, the chromic oxide content is decreased to 0.87% when the blowing duration is 10 min, stirring rate is 300 L/min and initial temperature is 1 475 ℃, meeting the requirement of chromium recovery in production.
The top blowing experiment is carried out in the stainless steel ladle. Parameter settings of blowing flow rate,duration and initial temperature on the effect of reducibility chromic oxide in the slag are studied. The result show that top blowing can substantially increase the reducibility of chromic oxide in the slag and the chromic oxide content is decreased to 0.97% after 10 min, which is approaching to chromic oxide contnet 0.7% under laboratory conditions. In actual production, the chromic oxide content is decreased to 0.87% when the blowing duration is 10 min, stirring rate is 300 L/min and initial temperature is 1 475 ℃, meeting the requirement of chromium recovery in production.
引文
[1]刘根泉.2008—2009年中国铬系铁合金生产经营分析[J].冶金管理,2009(10):14-18.
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[3]郭华,王贵平,苍大强,等.碳含量影响EAF不锈钢渣中(Cr2O3)还原的实验研究[G]//冶金研究.北京:冶金工业出版社,2007.
[4]刘之彭,毛佳君,李秋菊,等.不锈钢渣中氧化铬还原的实验研究[J].上海金属,2009,31(6):19-22.
[5]王书桓,张响,徐志荣,等.150 t顶吹转炉溅渣护炉工艺冷态模拟试验[J].河北联合大学学报(自然科学版),2007,29(34):38-42.
[6]曾亚南,李俊国,韩志杰,等.唐钢50 t转炉溅渣护炉水力模型实验研究[J].河北联合大学学报(自然科学版),2011,33(2):38-43.
[7]潘贻芳,赵宏欣,吴燕,等.120 t复吹转炉溅渣动力学冷态模拟及应用[J].炼钢,2013,29(3):1-5.
[8]陈文彬,付辉龙,毛佳君,等.不锈钢冶炼渣铁浴熔融还原动力学实验研究[J].上海金属,2012,34(4):54-57.
[9]郭杰,林姜多,刘之彭,等.不锈钢渣熔融还原中铬在铁浴和熔渣间的分配行为[J].有色金属(冶炼部分),201(9):1-4.
[10]刘发娟,陈兴润.降低430不锈钢AOD还原后炉渣中Cr2O3含量的试验分析[J].酒钢科技,2015(3):26-31.
[2]李志斌.还原不锈钢渣中Cr2O3的实验研究[C].中国金属学会特钢分会、特钢冶炼学术委员会,2008.
[3]郭华,王贵平,苍大强,等.碳含量影响EAF不锈钢渣中(Cr2O3)还原的实验研究[G]//冶金研究.北京:冶金工业出版社,2007.
[4]刘之彭,毛佳君,李秋菊,等.不锈钢渣中氧化铬还原的实验研究[J].上海金属,2009,31(6):19-22.
[5]王书桓,张响,徐志荣,等.150 t顶吹转炉溅渣护炉工艺冷态模拟试验[J].河北联合大学学报(自然科学版),2007,29(34):38-42.
[6]曾亚南,李俊国,韩志杰,等.唐钢50 t转炉溅渣护炉水力模型实验研究[J].河北联合大学学报(自然科学版),2011,33(2):38-43.
[7]潘贻芳,赵宏欣,吴燕,等.120 t复吹转炉溅渣动力学冷态模拟及应用[J].炼钢,2013,29(3):1-5.
[8]陈文彬,付辉龙,毛佳君,等.不锈钢冶炼渣铁浴熔融还原动力学实验研究[J].上海金属,2012,34(4):54-57.
[9]郭杰,林姜多,刘之彭,等.不锈钢渣熔融还原中铬在铁浴和熔渣间的分配行为[J].有色金属(冶炼部分),201(9):1-4.
[10]刘发娟,陈兴润.降低430不锈钢AOD还原后炉渣中Cr2O3含量的试验分析[J].酒钢科技,2015(3):26-31.