钒钛磁铁矿的复合造块新工艺
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摘要
钒钛磁铁精粉具有TiO_2含量高、SiO_2含量低等特点,由此生产的烧结矿转鼓强度差,低温还原粉化严重。为了保证烧结矿获得足够高的强度,必须生产高碱度甚至超高碱度烧结矿,但对于承钢而言,酸性炉料供应短缺、价格高迫使烧结矿碱度为2.0~2.3,提高烧结矿的质量存在很大困难。提出了一种铁矿粉造块新工艺,即复合造块工艺,论述了该工艺在技术上的可行性,并与常规烧结工艺在烧结工艺参数、烧结矿产质量指标和冶金性能方面进行了对比分析,并对复合块矿进行了显微结构分析,从机制上进一步证明了该工艺的优越性和可行性。
Vanadium-titanium magnetite is characterized by high content of TiO_2,low content of SiO_2.Therefore,the tumbler strength and RDI of sinter ARE are poor.In order to ensure a sufficiently high sinter strength,high alkalinity or high basicity sinter must be considered to produce.For Chenggang Steel,because of shortages and high prices of acidic charge,sinter's basicity is higher to the range of 2.0 to 2.3,and the quality of sinter is very difficult to improve.A new sintering process called iron ore composite agglomeration process was presented and discussed in detail the technical feasibility of the process.Sintering process parameters,sinter quality indicators and metallurgical properties was compared.Finally,the microstructure of composite lump ore was investigated.The results show the superiority of this new process.
Vanadium-titanium magnetite is characterized by high content of TiO_2,low content of SiO_2.Therefore,the tumbler strength and RDI of sinter ARE are poor.In order to ensure a sufficiently high sinter strength,high alkalinity or high basicity sinter must be considered to produce.For Chenggang Steel,because of shortages and high prices of acidic charge,sinter's basicity is higher to the range of 2.0 to 2.3,and the quality of sinter is very difficult to improve.A new sintering process called iron ore composite agglomeration process was presented and discussed in detail the technical feasibility of the process.Sintering process parameters,sinter quality indicators and metallurgical properties was compared.Finally,the microstructure of composite lump ore was investigated.The results show the superiority of this new process.
引文
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[18]甘勤,何群.影响钒钛烧结矿铁酸钙生成因素的研究[J].烧结球团,2008,33(2):9.
[2]Ishikawa Y,Sasaki S.Production of Low FeO and Low Sio:Sinter at Tobata No.3 Sinter Plant[J].Transactions ISIJ,1982,22:83.
[3]Sakamoto N,Kumasaka A,Komatsu O,et al.Development of New Iron Ore Agglomeration Process[C]//5th International Symposium on Agglomeration.Nagoya,1989.
[4]吕庆,杨松陶,孙艳芹,等.钒钛磁铁矿分流制粒烧结中配碳量的影响[J].钢铁,2011,46(11):26.
[5]吕庆,亢立民,孙丽芬,等.冀东磁铁矿球团的氧化机理[J].钢铁研究学报,2007,19(8):11.
[6]Oboso A,Kouiehi O.Operation Results of Separated Granulation Equipment at No.4 Sinter Plant[J].Sumitomo Metal,2000,52(2):15.
[7]袁文彬.日本铁矿石造块新法的基础研究[J].烧结球团,1990,15(1):7.
[8]Kasai E,Komarov S,Nushim k,et al.Design of Bed Structure Aiming the Control of Void Structure Formed in The Sinter Cake[J].ISIJ International,2005,45(4):538.
[9]姜涛,张克诚,胡友明.铁矿粉复合造块工艺成矿机理研究[C]//06国际铁矿造块学术研讨会论文集.长沙:[出版地址不详],2006.
[10]郭兴敏,朱利.高碱度烧结矿的矿物组成与矿相结构特征[J].钢铁,2007,42(1):17.
[11]周取定,孔令坛.铁矿粉烧结理论与工艺[M].北京:冶金工业出版社,1992.
[12]李寿宝,任志国.厚料层烧结技术的完善与小球团烧结工艺的发展[J].烧结球团,1996,21(2):1.
[13]麻瑞田,刘振达.双球烧结的实验研究[J].钢铁,1991,26(2):1.
[14]Kasai E,Komarov S,Nushim k,et al.Design of Bed Structure Aiming the Control of Void Structure Formed in the Sinter Cake[J].ISIJ International,2005,45(4):538
[15]贺先新.浅析武钢厚料层烧结的发展[J].烧结球团,2004,29(3):1.
[16]张世娟,王树同.针状铁酸钙形成机理的试验研究[J].钢铁,1992,27(7):7.
[17]刘晓荣,邱冠洲.低温烧结时铁酸盐的矿物学研究[J].钢铁,2000,25(2):7.
[18]甘勤,何群.影响钒钛烧结矿铁酸钙生成因素的研究[J].烧结球团,2008,33(2):9.