Abstract:In order to study the thermal strength of carbon-bearing pellet, the thermal strength of carbon-bearing pellet was tested by the automatic thermal strength test equipment. The effects of reduction temperature,[n(C)/n(O)]and reduction time on the thermal strength of carbon-bearing pellets were investigated by orthogonal test, and the experimental results calculated and analyzed According to the single factor control variable, the experiment to study the compressive strength of carbon-bearing pellet thermal and reducing compressive strength after cooling were conducted on the contrast. Then the thermal strength mechanisms of carbon-bearing pellets were analyzed by XRD and thermodynamics theory. It is founded that the variation trend of thermal strength of carbon-bearing pellet in 950-1 250℃ is a process of decreasing first and then increasing. At about 1050 ℃, the thermal strength of carbon-bearing pellet reaches to the lowest, then the thermal strength began to rebound with the increase of metallic iron content. The[Rt,][Rn(C)/n(O),][RT]are 67.33, 33.80 and 9.09, respectively, based on the factor range that is the effect of the reduction temperature >[n(C)/n(O)]> the reduction time. The results show that under the conditions with the same[n(C)/n(O)]and reduction time, the compressive strength of the reduction pellets after cooling is different from the thermal strength With the same reduction temperature and time, the variation trend of the strength of reduction pellets after cooling is consistent with the thermal strength.
杨乐彪,李家新,杨佳龙,魏汝飞,孟庆民,龙红明. 铁矿含碳球团高温抗压强度研究及机理分析[J]. 钢铁, 2017, 52(10): 13-19.
YANG Le-biao,LI Jia-xin,YANG Jia-long,WEI Ru-fei,MENG Qing-min,LONG Hong-ming. Thermal compressive strength and its mechanism analysis of carbon-bearing pellet. Iron and Steel, 2017, 52(10): 13-19.
ZHU Bing-xiu, WEI Guo, JIANG Xin, SHEN Feng-man.Study on Cracking Characteristics of Limonite-coal Pellet [A]. Sintering and Pelletizing, 2012, 37(2):36-40
[7]
ZHU Bing-xiu, WEI Guo, JIANG Xin, SHEN Feng-man.Study on Cracking Characteristics of Limonite-coal Pellet [A]. Sintering and Pelletizing, 2012, 37(2):36-40
[8]
CyroTAKANO and MarceloBredaMOURAO, .Comparison of High Temperature Reducing Pellets Produced from Sintering Plant [J].ISIJ International, 2001, 41(2):22-26
[8]
CyroTAKANO and MarceloBredaMOURAO, .Comparison of High Temperature Reducing Pellets Produced from Sintering Plant [J].ISIJ International, 2001, 41(2):22-26
WU jian, Qi yuan hong.Strength after reduction and reduction of carbon containing pellets[J].JOURNAL OF UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING, 2000, 22(2):101-104
[10]
WU jian, Qi yuan hong.Strength after reduction and reduction of carbon containing pellets[J].JOURNAL OF UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING, 2000, 22(2):101-104
ZHANG Xu, ZHANG Jian-liang, GUO Hao.Experimental Study on Optimization of Technological Parameters and Agglomeration Mechanism of Carbon-contaming Pellets.[J].THE CHINESE JOURNAL OF PROCESS ENGINEERING, 2009, 9(1):25-30
ZHANG Xu, ZHANG Jian-liang, GUO Hao.Experimental Study on Optimization of Technological Parameters and Agglomeration Mechanism of Carbon-contaming Pellets.[J].THE CHINESE JOURNAL OF PROCESS ENGINEERING, 2009, 9(1):25-30
GAO Yun-ming, YU Fang-chao .Measurement of High Temperature Compressive Strength of Pellets Containing Carbon[J].JOURNAL OF WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGYNATURAL SCIENCE EDITION), 2006, 29(2):109-111
[14]
GAO Yun-ming, YU Fang-chao .Measurement of High Temperature Compressive Strength of Pellets Containing Carbon[J].JOURNAL OF WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGYNATURAL SCIENCE EDITION), 2006, 29(2):109-111
WU Bin, LONG Shi-gang, CAO Feng.Effect Factors of the Carbon-bearing Pellet Strengths and Metallization Rate[J].JOURNAL OF ANHUI UNIVERSITY OF TECHNOLOGY(NATURAL SCIENCE), 2007, 24(2):127-129
WU Bin, LONG Shi-gang, CAO Feng.Effect Factors of the Carbon-bearing Pellet Strengths and Metallization Rate[J].JOURNAL OF ANHUI UNIVERSITY OF TECHNOLOGY(NATURAL SCIENCE), 2007, 24(2):127-129
[18]
ZHOU Cheng-gen, ZHANG Jian-liang.edt.Study on Change of Compressive Strength of Carbon-containing Pellets after Preheating [J].Sintering and Pelletizing, 2013, 38(3):33-38
ZHOU Cheng-gen, ZHANG Jian-liang.edt.Study on Change of Compressive Strength of Carbon-containing Pellets after Preheating [J].Sintering and Pelletizing, 2013, 38(3):33-38
[19]
方开泰, 马长兴.正交与均匀实验设计[M].科学出版社, 2001
[20]
FANG kai tai, Ma chang xin.Uniform experimental design and Orthogonal[M], 2001
[21]
牛永胜, 马永磊等.含碳球团配碳比的试验研究[J].河北冶金, 2001, (2):-
[20]
FANG kai tai, Ma chang xin.Uniform experimental design and Orthogonal[M], 2001
[22]
Niu yong shen, Ma yong lei.TEST AND RESEARCH OF CARBON FITTING RATIO OF CARBON-BEARING PELLET [J].HEBEI METALLURGY, 2001, (2):-
FU lei, lv ji ping.edt. Experimental study on high temperature compressive strength of iron ore pellets containing carbon. In 2008 the national Ironmaking Technology Conference and ironmaking Conference(Book One) [C].2008:10.
[24]
FU lei, lv ji ping.edt. Experimental study on high temperature compressive strength of iron ore pellets containing carbon. In 2008 the national Ironmaking Technology Conference and ironmaking Conference(Book One) [C].2008:10.
[25]
王筱留, 钢铁冶金学[M].冶金工业出版社, 2000
[25]
王筱留, 钢铁冶金学[M].冶金工业出版社, 2000
[26]
WANG xiao liu.Ferrous metallurgy[M]. Metallurgical industry press, 2000
[26]
WANG xiao liu.Ferrous metallurgy[M]. Metallurgical industry press, 2000
[27]
Bonalde A, Henriquez A, Manrique M. Kinetic Analysis of the Iron Oxide Reduction Using Hydrogen-Carbon Monoxide Mixtures as Reducing Agent[J].ISIJ International, 2005, 45(9):1255-1255
Bonalde A, Henriquez A, Manrique M. Kinetic Analysis of the Iron Oxide Reduction Using Hydrogen-Carbon Monoxide Mixtures as Reducing Agent[J].ISIJ International, 2005, 45(9):1255-1255
[29]
WEI Ru-fei, LI Jia-xin, LI Jie-min. Reduction Kinetics of Carbon-containing Pellets Made of Dust and Sludge under Weak Oxidizing Atmosphere[J].THE CHINESE JOURNAL OF PROCESS ENGINEERING, 2011, 11(3):86-92
WEI Ru-fei, LI Jia-xin, LI Jie-min. Reduction Kinetics of Carbon-containing Pellets Made of Dust and Sludge under Weak Oxidizing Atmosphere[J].THE CHINESE JOURNAL OF PROCESS ENGINEERING, 2011, 11(3):86-92