钒钛矿转底炉直接还原炉底上涨成因及对策
|
摘要
针对钒钛磁铁矿转底炉直接还原过程中炉底上涨的原因进行了分析研究,并在实验室开展了相关试验。通过分析黏结物化学组成和物相组成,得出转底炉炉底上涨为玻璃质液相黏结高熔点橄榄石和铁氧化物累积导致炉底上涨;通过实验室试验研究表明,物料粒度是影响转底炉炉底上涨的关键因素,其次是还原温度和还原时间。根据上述研究结果,结合资源综合利用中试线现场条件,优化了原料转底炉系统的工艺参数,改进了干球技术指标,转底炉炉底上涨基本得到抑制,实现了试验生产顺行。
The problem of bottom rising of the rotary hearth furnace(RHF) in vanadium titanium magnetite direct reduction process was analyzed.On this basis,related laboratory experiments were carried.It shows that the silicate glass,olivine and iron oxides were the main agglomeration matters.The results of experiment show that particle size of the materials of the RHF was the main factor leading to bottom rising and secondary main was the reduction temperature and reaction time.Based on the research results and combining the conditions of the pilot plant measures were carried out to prevent bottom rising,such as optimizing process parameters of raw materials and RHF system.After that the technical indexes of dried pellets were improved,and the bottom rising problem was controlled.Moreover,RHF was running smoothly.
The problem of bottom rising of the rotary hearth furnace(RHF) in vanadium titanium magnetite direct reduction process was analyzed.On this basis,related laboratory experiments were carried.It shows that the silicate glass,olivine and iron oxides were the main agglomeration matters.The results of experiment show that particle size of the materials of the RHF was the main factor leading to bottom rising and secondary main was the reduction temperature and reaction time.Based on the research results and combining the conditions of the pilot plant measures were carried out to prevent bottom rising,such as optimizing process parameters of raw materials and RHF system.After that the technical indexes of dried pellets were improved,and the bottom rising problem was controlled.Moreover,RHF was running smoothly.
引文
[1]傅文章.攀西钒钦磁铁矿资源特征及综合利用问题的基本分析[J].矿产综合利用,1996(1):27.
[2]张建廷,陈碧.攀西钒钛磁铁矿主要元素赋存状态及回收利用[J].矿产保护与利用,2008(5):38.
[3]峨嵋矿产综合利用研究所,攀枝花钢铁公司,攀枝花冶金矿山公司.攀枝花铁矿中有益元素及其在生产过程中的分布和赋存状态的研究[R].攀枝花:攀枝花钢铁公司,1972:22.
[4]洪流,丁跃华,谢洪恩.钒钛磁铁矿转底炉直接还原综合利用前景[J].金属矿山,2007(5):10.
[5]伦志刚,胡途,吕学伟.多层含碳球团转底炉内直接还原行为[J].钢铁,2013,48(1):15.
[6]吴秋廷.钒钛磁铁矿转底炉直接还原工程化技术研究[J].钢铁,2010,45(11):22.
[7]黄洁.谈转底炉的发展[J].中国冶金,2007,17(4):23.
[8](西德)德国钢铁工程师协会.渣图集[M].王俭,彭愉强,毛裕文,等译.北京:冶金工业出版社,1987:96.
[9]陈建设.冶金实验研究方法[M].北京:冶金工业出版社,2003:55.
[10]张建良,王春龙,刘政建.钒钛磁铁矿含碳球团还原的影响因素[J].北京科技大学学报,2012,34(5):512.
[11]汪琦.铁矿含碳球团技术[M].北京:冶金工业出版社,2005:32.
[2]张建廷,陈碧.攀西钒钛磁铁矿主要元素赋存状态及回收利用[J].矿产保护与利用,2008(5):38.
[3]峨嵋矿产综合利用研究所,攀枝花钢铁公司,攀枝花冶金矿山公司.攀枝花铁矿中有益元素及其在生产过程中的分布和赋存状态的研究[R].攀枝花:攀枝花钢铁公司,1972:22.
[4]洪流,丁跃华,谢洪恩.钒钛磁铁矿转底炉直接还原综合利用前景[J].金属矿山,2007(5):10.
[5]伦志刚,胡途,吕学伟.多层含碳球团转底炉内直接还原行为[J].钢铁,2013,48(1):15.
[6]吴秋廷.钒钛磁铁矿转底炉直接还原工程化技术研究[J].钢铁,2010,45(11):22.
[7]黄洁.谈转底炉的发展[J].中国冶金,2007,17(4):23.
[8](西德)德国钢铁工程师协会.渣图集[M].王俭,彭愉强,毛裕文,等译.北京:冶金工业出版社,1987:96.
[9]陈建设.冶金实验研究方法[M].北京:冶金工业出版社,2003:55.
[10]张建良,王春龙,刘政建.钒钛磁铁矿含碳球团还原的影响因素[J].北京科技大学学报,2012,34(5):512.
[11]汪琦.铁矿含碳球团技术[M].北京:冶金工业出版社,2005:32.