Abstract：In order to study the phase change law of one high aluminum limonite in direct reduction process, the mineral constituent was analyzed by polarized light microscopy, scanning electron microscope (SEM), X-ray diffractometer (XRD) and Mineral Liberation Analyzer (MLA). Then, the content of water was qualitatively determined. The results indicated that this high aluminum limonite was mainly composed of goethite, hematite, chromite, quartz and chlorite.The microscopic morphology of ore was dominated in loose goethite, and its internal structure contained chromite, hematite and silicate minerals with differentgrain sizes. As a consequence, some chadacryst minerals were hardly removed by physical separation. The beneficial elements such as Cr, Ni and Co mainly existed in carriers including goethite and chorite. The testing results of crystal water indicated that the crystal water or hydroxyl was lost in temperature rise process at 290 ℃ and 830 ℃ for goethite and chlorite, respectively. As a result, the phases changed to hematite and olivine.
史志新. 高铝型褐铁矿直接还原工艺相变研究[J]. 冶金分析, 2016, 36(11): 34-40.
SHI Zhi-xin. Study on phase change in direct reduction process of high aluminum limonite. , 2016, 36(11): 34-40.
刘云峰,陈滨.红土镍矿资源现状及其冶炼工艺的研究进展[J].矿冶,2014,23(4):70-73.LIU Yun-feng,CHEN Bin.The current status of laterite nickel ore resources and advance in its processing technology[J].Mining and Metallurgy,2014,23(4):70-73.
[2]
刘志国,孙体昌,蒋曼,等.红土镍矿原矿性质及其对直接还原焙烧的影响机理[J].北京科技大学学报,2014,36(11):1448-1454LIU Zhi-guo,SUN Ti-chang, JIANG Man,et al.Laterite ore properties and their influence mechanism on direct reduction roasting[J].Journal of university of science and technology Beijing, 2014,36(11):1448-1454.
[3]
李光辉,周太华,刘牡丹,等.高铝褐铁矿铝铁分离新工艺及其机理[J].中国有色金属学报,2008,18(11):2087-2090.LI Guang-hui, ZHOU Tai-hua, LIU Mu-dan,et al.Novel process and mechanisms of aluminum-iron separation of high-aluminum limonite ore[J].The Chinese Journal of Nonferrous Metals,2008,18(11):2087-2090.
[4]
李光辉,刘牡丹,姜涛,等.高铝铁矿石工艺矿物学特征及铝铁分离技术[J].中南大学学报:自然科学版,2009,40(5):1165-1170.LI Guang-hui,LIU Mu-dan,JIANG Tao,et al.Mineralogy characteristics and separation of aluminum and iron of high-aluminum iron ores[J].Journal of Central South University:Science and Technology,2009,40(5):1165-1170.
[5]
符剑刚,王晖,凌天鹰,等.红土镍矿处理工艺研究现状与进展[J].铁合金,2009(3):16-20.FU Jian-gang,WANG Hui,LING Tian-ying,et al.Status and process on treatment technologies of laterite-nickel ore[J].Ferro-alloys,2009(3):16-20.
[6]
熊雪良,钟彪,张丽芬.硅镁型红土镍矿的工艺矿物学研究[J].矿冶工程,2012,32(8):309-311.XIONG Xue-liang,ZHONG Biao,ZHANG Li-fen.Study on process mineralogy of silicon magnesium laterite ore[J].Mining and Metallurgical Engineering,2012,32(8):309-311.
[7]
史志新,刘锦燕,王春梅.不同碱度钢渣显微形貌及物相变化分析研究[J].冶金分析,2015,35(11):16-20.SHI Zhi-xin,LIU Jin-yan,WANG Chun-mei.Analysis and research on micro-morphology and phase change of steel slag with different alkalinity[J].Metallurgical Analysis,2015,35(11):16-20.
