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| Preparation of iron nugget using low grade iron ore of high alumina and sulphur |
| WANG Guang，XUE Qing-guo，WANG Jing-song |
| State Key Laboratory of Advanced Metallurgy， University of Science and Technology Beijing， Beijing 100083， China |
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Abstract The iron nugget process using low grade iron ore of high alumina and sulphur as raw material was performed at laboratory scale. The effect of reduction temperature， carbon content， basicity and additives on the reduction and melting behavior of the high alumina ore/coal composite pellet was investigated. The sulphur content of the iron nugget was also analyzed. The standard pellet (without any additives) had bad melting separation and the carburization degree of the reduced iron was low. The increasing of carbon content could improve the melting separation a little. The reduction rate of the pellet would be improved with the increasing of basicity and the pellet could melt better at 1 450 ℃. The sulphur content of the iron nugget gradually decreased as the basicity increased from 0.6 to 1.2 and was obviously low when the basicity was 1.2. The pellet would also melt worse with the Na2CO3 content in the pellet increased and could melt to some extent at 1 450 ℃. The sulphur content of the iron nugget would also gradually decrease. However， the effect of Na2CO3 on the sulphur content of the iron nugget was not much. The sulphur content of the iron nugget was 0.085% and the desulphurization rate was 96.5% with basicity of 1.2， 8% Na2CO3 and 4% CaF2 reduced at 1 450 ℃. The obtained iron nugget could meet the requirement of steel making to some extent.
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Received: 04 January 2015
Published: 29 October 2015
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| [1] |
ZHANG Wei-li1,WU Sheng-li1,HU Zhong-jie1,2. Statistical analysis of factors affecting desulfurization rate of activated coke for sintering flue gas[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(4): 281-288. |
| [2] |
HU Chang-qing,WANG Xiao-lei,SHI Xue-feng,WANG Zhi-xing,HAN Wei-gang. Effect of alkalinity and MgO content on mineral composition and microstructure of FeOx-SiO2-CaO-MgO-Al2O3 system[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(2): 103-110. |
| [3] |
YIN Chuan-lei, YANG Li-mei, TIAN Chun-yang, MA Jian-chao. Analysis of KR hot metal desulfurizer escaped and slag agglomeration in agitator[J]. Iron and Steel, 2020, 55(1): 34-37. |
| [4] |
LU Yanan,WU Shengli,WANG Laixin,KOU Mingyin. Analysis of chemical compositions of slag affecting #br#
desulphurization in hot metal of COREX process[J]. Iron and Steel, 2019, 54(9): 33-38. |
| [5] |
XIAO Zunhu1，LIU Peng2，XU Gangjun2，ZHOU Junjun2，SUI Yafei2. Selection of calcium treatment technology of LF #br#
refining for different steel[J]. Iron and Steel, 2019, 54(9): 62-72. |
| [6] |
Shi-han Zhang, Guang Wang, Hao Zhang, Jing-song Wang, Qing-guo Xue. Effect of gangue composition on iron nugget production from iron ore–coal composite pellet[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2019, 26(9): 917-925. |
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2015, Vol. 50 
