Abstract：In order to research the compressive strength of pellets in blast furnace, pellets were tested in a neutral and reducing atmosphere at different temperatures and reduction degrees by using self-designed and manufactured high-temperature strength and creep solid materials online tester. The results show that: in neutral atmosphere, when the temperature reaches 1 000 ℃, the compressive strength is over 2 750 N. With the temperature increasing, there is a sharp decline on the compressive strength; in reducing atmosphere, there is a significant strength decrease between the initial reduced pellets than the pellets in neutral atmosphere at same temperature. When the temperature is up to 900 ℃, the strength is only 1 250 N and the fragment pellets are more likely powdering. The microstructure analysis indicates that the growth of lattice, the new iron with increased porosity and cracks, and the weakness of particle bonding cause the decrease of compressive strength.
唐敬坤， 郭 磊， 郭占成. 球团矿高温还原过程中抗压强度变化及机理[J]. 钢铁, 2014, 49(7): 66-71.
TANG Jing-kun, GUO Lei, GUO Zhan-cheng. Changes of Hot Compressive Strength of Iron Ore Pellets During Reduction Process and Mechanism. Iron and Steel, 2014, 49(7): 66-71.
Bahgat, M, et al.Magnetite Surface Morphology during Hematite Reduction with COCO2 at 1073 K[J].Materials Letters, 2007, 61(2):339-342
[6]
Bahgat, M, et al.Magnetite Surface Morphology during Hematite Reduction with COCO2 at 1073 K[J].Materials Letters, 2007, 61(2):339-342
[7]
Bohn, C, D.et althe Kinetic of Reduction of Iron Oxide by Carbon Monoxide Mixed with Carbon Dioxide[J].AIChE JOURNAL, 2010, 56(4):1016-1029
[7]
Bohn, C, D.et althe Kinetic of Reduction of Iron Oxide by Carbon Monoxide Mixed with Carbon Dioxide[J].AIChE JOURNAL, 2010, 56(4):1016-1029
[8]
A.Bonalde,AHenriquez and M. Manrique. Kinetic Analysis of the Iron Oxide Reduction Using Hydrogen-Carbon Monoxide Mixtures as Reducing Agent,[J].ISIJ international, 2005, 45(9):1255-1260
[8]
A.Bonalde,AHenriquez and M. Manrique. Kinetic Analysis of the Iron Oxide Reduction Using Hydrogen-Carbon Monoxide Mixtures as Reducing Agent,[J].ISIJ international, 2005, 45(9):1255-1260
[9]
Jose Adilson de CASTRO, HIROGAM, Jun-ichiro YAGI.Transient Mathematical Model of Blast Furnace Based on Multi-Fluid Concept,with Application to High PCI Operation[J].ISIJ international, 2000, 40(7):637-646
[9]
Jose Adilson de CASTRO, HIROGAM, Jun-ichiro YAGI.Transient Mathematical Model of Blast Furnace Based on Multi-Fluid Concept,with Application to High PCI Operation[J].ISIJ international, 2000, 40(7):637-646
[10]
HUANG Zhun-cheng, YI Ling-yun, JIANG Tao.Mechanisms of Strength Decrease in the Initial Reduction of Iron Ore Oxide Pellets[J].Powder Technology, 2012, 221:284-291
[10]
HUANG Zhun-cheng, YI Ling-yun, JIANG Tao.Mechanisms of Strength Decrease in the Initial Reduction of Iron Ore Oxide Pellets[J].Powder Technology, 2012, 221:284-291
2014, Vol. 49 
