Abstract:In order to investigate the effect of[w(TiO2)]on the metallurgical properties of sinter,influences of[w(TiO2)]on mineral structure and softening-melting property were investigated through SEM-EDS and drop test. The results indicated that with the increase of[w(TiO2)]from 1.40% to 3.02% in sinter, the contents of hematite, perovskite, and silicate in sinter increased, while mass of magnetite and complex calcium ferrite gradually reduced. The hematite content increased from 20.69% to 26.05% with crystal phase changing from native hematite to secondary hematite, which had a negative effect on the tumbler strength and low temperature reduction degradation of sinter. Therefore, increase of[w(TiO2)]in sinter (<2%) contributed to the development of liquid phase, the reduction of fuel consumption,and the increase of the sinter drum strength. Ti in sinter was mainly distributed in perovskite, but less in SFCA and secondary hematite. With the increase of[w(TiO2)]in the sinter, the soften temperature[(t10 and t40)]increased, which was above 1 130 ℃. The soften interval[ΔtA]of sinter containing 1.4%[w(TiO2)]is 195 ℃, while[ΔtA]are more than 200 ℃.
收稿日期: 2016-08-01
出版日期: 2017-03-10
引用本文:
王耀祖,张建良,刘征建,张亚鹏,刘东辉,杜诚波. [w(TiO2)]对烧结矿矿相结构及软熔滴落性能的影响[J]. 钢铁, 2017, 52(3): 20-28.
WANG Yao-zu,ZHANG Jian-liang,LIU Zheng-jian,ZHANG Ya-peng,LIU Dong-hui,DU Cheng-bo. Effects of[w(TiO2)]on mineral structure and softening-melting property of sinter. Iron and Steel, 2017, 52(3): 20-28.
Deqing ZHU, Jian PAN, Guanzhou QIU, John CLOUT, Changan WANG, Yufeng GUO.Mechano-chemical activation of magnetite concentrate for improving its pelletability by high pressure roll grinding[J].ISIJ International, 2004, 44(2):310-315
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Deqing ZHU, Jian PAN, Guanzhou QIU, John CLOUT, Changan WANG, Yufeng GUO.Mechano-chemical activation of magnetite concentrate for improving its pelletability by high pressure roll grinding[J].ISIJ International, 2004, 44(2):310-315