|
|
|
| Direct reduction of high-iron bauxite for recovery of nuggets and Al2O3 |
| ZHANG Ying-yi1,2，CHENG Xiang-li1，QI Yuan-hong1，ZOU Zong-shu2 |
1. State Key Laboratory of Advance Steel Processes and Products， Central Iron and Steel Research Institute， Beijing 100081， China
2. School of Material and Metallurgy， Northeast University， Shenyang 110819， Liaoning， China |
|
|
|
|
Abstract Effects of the direct reduction process on the nuggets size and recovery percent were investigated by coal-based direct reduction and leaching process， and the effects of [(w(CaO)/w(Al2O3))] on the slag composition and leaching rate of alumina were investigated by the same way. The results show that when the [(w(CaO)/w(Al2O3))] is 1.7， [w(C)/w(O)] is 1.4， reduction temperature is 1 450 ℃， and the reduction time is 20 min， the nuggets size is biggest and the nuggets recovery percent is highest， the nuggets size and recovery percent are 11.5 mm and 93%， respectively. When the [(w(CaO)/w(Al2O3))] is 1.0， the furnace slag is mainly composed of gehlenite (Ca2Al(Al，Si)2O7)， when the [(w(CaO)/][w(Al2O3))] is 1.5， the furnace slag is mainly composed of gehlenite (Ca2Al(Al，Si)2O7)， dicalcium silicate(Ca2SiO4) and mayenite(Ca12Al14O33)， when the [w(CaO)/w(Al2O3)] is 1.7-1.9， the furnace slag is mainly composed of dicalcium silicate(Ca2SiO4) and mayenite(Ca12Al14O33). When the [(w(CaO)/w(Al2O3))] is 1.7 and leaching time is 2.0 h， the leaching rate of alumina is highest which is 87.5%， the leaching rate is increased by 9.4% than that of 0.5 h leaching time. Therefore， when the furnace slag is mainly composed of dicalcium silicate(Ca2SiO4) and mayenite(Ca12Al14O33)， it is more conducive toleaching of alumina.
|
|
Received: 08 May 2014
Published: 13 April 2015
|
|
|
|
|
|
| [1] |
Xuefei Liu, Qingfei Wang, Qizuan Zhang, et al., Mineralogical characteristics of the superlarge Quaternary bauxite deposits in Jingxi and Debao counties, western Guangxi, China[J]. Journal of Asian Earth Sciences, 2012, 52:53-62.
|
| [1] |
Xuefei Liu, Qingfei Wang, Qizuan Zhang, et al., Mineralogical characteristics of the superlarge Quaternary bauxite deposits in Jingxi and Debao counties, western Guangxi, China[J]. Journal of Asian Earth Sciences, 2012, 52:53-62.
|
| [2] |
Xuefei Liu, Qingfei Wang, Jun Deng, et al., Mineralogical and geochemical investigations of the Dajia Salento-type bauxite deposits, western Guangxi, China[J]. Journal of Geochemical Exploration, 2010,105: 137-152.
|
| [2] |
Xuefei Liu, Qingfei Wang, Jun Deng, et al., Mineralogical and geochemical investigations of the Dajia Salento-type bauxite deposits, western Guangxi, China[J]. Journal of Geochemical Exploration, 2010,105: 137-152.
|
| [3] |
WANG Rui-hu, LI Mei, CHEN Ding-xiong. Resource potential prediction for lateritic high-iron gibbsite bauxite deposits in Guangxi. Geological Bulletin of China, 2011, 30(8):1303-1311.
|
| [3] |
WANG Rui-hu, LI Mei, CHEN Ding-xiong. Resource potential prediction for lateritic high-iron gibbsite bauxite deposits in Guangxi. Geological Bulletin of China, 2011, 30(8):1303-1311.
|
| [4] |
H. Kahn*, M.M.L. Tassinari, G. Ratti. Characterization of bauxite fines aiming to minimize their iron content[J]. Minerals Engineering, 2003(16): 1313-1315.
|
| [4] |
H. Kahn*, M.M.L. Tassinari, G. Ratti. Characterization of bauxite fines aiming to minimize their iron content[J]. Minerals Engineering, 2003(16): 1313-1315.
|
| [5] |
James M. McClelland and Gary E. Metius. Recycling Ferrous and Nonferrous Waste Streams with FASTMET[J]. Applied Technology, 2003(8):30-34.
|
| [5] |
James M. McClelland and Gary E. Metius. Recycling Ferrous and Nonferrous Waste Streams with FASTMET[J]. Applied Technology, 2003(8):30-34.
|
| [6] |
DING Yin-gui, WANG Jing-song, WANG Guang. et al., Comprehensive Utilization of Paigeite Ore Using Iron Nugget Making Process[J]. Journal of Iron And Stell Research. 2012,19(6):9-13.
|
| [6] |
DING Yin-gui, WANG Jing-song, WANG Guang. et al., Comprehensive Utilization of Paigeite Ore Using Iron Nugget Making Process[J]. Journal of Iron And Stell Research. 2012,19(6):9-13.
|
| [7] |
Shoichi KIKUCHI, Shuzo ITO, Dr. Isao KOBAYASHI. et al., ITmk3? Process[J]. KOBELCO TECHNOLOGY REVIEW, 2010(29): 77-84.
|
| [7] |
Shoichi KIKUCHI, Shuzo ITO, Dr. Isao KOBAYASHI. et al., ITmk3? Process[J]. KOBELCO TECHNOLOGY REVIEW, 2010(29): 77-84.
|
| [8] |
I. F. Kurunov. The Direct Productuion of Iron and Alternatives to the Blast Funace in Iron Metallurgy for the 21st Century[J]. Metallurgist, 2010,54(5/6):335-342.
|
| [8] |
I. F. Kurunov. The Direct Productuion of Iron and Alternatives to the Blast Funace in Iron Metallurgy for the 21st Century[J]. Metallurgist, 2010,54(5/6):335-342.
|
| [9] |
Lang Lehtinen: Mesabi Nugget Research Project, United States Department of Energy(2005).
|
| [9] |
Lang Lehtinen: Mesabi Nugget Research Project, United States Department of Energy(2005).
|
| [10] |
Shoichi KIKUCHI, Shuzo ITO, Dr. Isao KOBAYASHI, et al., ITmk3?Process[J]. Kobelco Technology Review, 2010(29): 77-84.
|
| [10] |
Shoichi KIKUCHI, Shuzo ITO, Dr. Isao KOBAYASHI, et al., ITmk3?Process[J]. Kobelco Technology Review, 2010(29): 77-84.
|
| [11] |
Natsuo Ishiwata, Yoshitaka Sawa, Hiroyuki Hiroha. et al., Investigation of Reduction and Smelting Mechanism in the Hi-QIP Process[J]. steel research international, 2009,80(8): 523-529.
|
| [11] |
Natsuo Ishiwata, Yoshitaka Sawa, Hiroyuki Hiroha. et al., Investigation of Reduction and Smelting Mechanism in the Hi-QIP Process[J]. steel research international, 2009,80(8): 523-529.
|
| [12] |
孙会兰, 于海燕, 齐铭, 王波, 等. 12CaO·7Al2O3和-2CaO·SiO2混合物相的合成和溶出性能研究[J]. 轻金属，2009(1):9-12.
|
| [12] |
孙会兰, 于海燕, 齐铭, 王波, 等. 12CaO·7Al2O3和-2CaO·SiO2混合物相的合成和溶出性能研究[J]. 轻金属，2009(1):9-12.
|
| [13] |
YU Hai-yan, PAN Xiao-lin, WANG Bo. et al., Effect of Na2O on formation of calcium aluminates in CaO-Al2O3-SiO2 system[J]. Trans. Nonferrous Met. Soc. 2012,(22): 3108-3112.
|
| [13] |
YU Hai-yan, PAN Xiao-lin, WANG Bo. et al., Effect of Na2O on formation of calcium aluminates in CaO-Al2O3-SiO2 system[J]. Trans. Nonferrous Met. Soc. 2012,(22): 3108-3112.
|
| [14] |
王波，于海燕，孙会兰，等. 物料配比对铝酸钙炉渣浸出和自粉性能的影响[J]. 东北大学学报(自然科学版), 2008, 29(11):1593-1596.
|
| [14] |
王波，于海燕，孙会兰，等. 物料配比对铝酸钙炉渣浸出和自粉性能的影响[J]. 东北大学学报(自然科学版), 2008, 29(11):1593-1596.
|
| [15] |
孙会兰，于海燕，王 波，等. 12CaO·7Al2O3 溶出动力学 [J]. 中国有色金属学报，2008, 18(10):1920-1925.
|
| [15] |
孙会兰，于海燕，王 波，等. 12CaO·7Al2O3 溶出动力学 [J]. 中国有色金属学报，2008, 18(10):1920-1925.
|
| [1] |
ZHU De-qing1,TIAN Hong-yu1,PAN Jian1,LIAO Hui2,GUO Zheng-qi1,XUE Yu-xiao1. Comprehensive utilization status and progress of low-grade laterite nickel ore[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(5): 351-362. |
| [2] |
ZHANG Han-quan,GAO Wang-jie,HU Chao-jie,YU Hong. Phase transformation of iron in copper slag coalbased direct reduction[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(4): 311-321. |
| [3] |
LI Xiao-ming, LI Yi, XING Xiang-dong. Particle growth characteristics of metallic iron in direct coal-based reduction of nickel slag[J]. Iron and Steel, 2020, 55(3): 104-109. |
| [4] |
PAN Jian, LU Sheng-hu, ZHU De-qing, LUO Yan-hong, SHI Yue. Pilotscale research on integrated process of direct reduction of siderite and synchronous coal upgrading[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2019, 31(4): 337-346. |
| [5] |
YANG Chun-shan， REN Ming-xin. Practice of waste dust mud treatment in Rizhao Steel[J]. Iron and Steel, 2019, 54(4): 83-91. |
| [6] |
DENG Zhiyin1, 2, 3，GE Wenying3,HU Bowen1, 2,CHEN Lei1, 2,ZHU Miaoyong1, 2. Effect of alloying on inclusions in Alkilled steel #br#
by a ferrochromium alloy[J]. Iron and Steel, 2019, 54(10): 30-37. |
|
|
|
|
2015, Vol. 50 
