Influences of MgO and Al2O3 on the mineralogical properties of calcium ferrite in iron ore sinter

doi:10.13745/j.esf.sf.2020.5.44

Abstract

Abstract:

Calcium ferrite is the main binder phase mineral in high basicity sintered ore. Its mineralogical characteristics such as content, crystal form, chemical composition and crystal structure play a key role in the quality of the sintered ore. The content directly affects the formation of calcium ferrite. In this paper, we used the chemically pure reagents of Fe₃O₄, SiO₂, CaO, MgO, and Al₂O₃ as raw materials and carried out micro-sintering experiments in the laboratory. Using XRD, polarizing microscope, electron microprobe and other means we performed quantitative analyses of MgO and Al₂O₃ in the raw material components to investigate the formation of calcium ferrite in sintered ores and its influence on mineralogical properties. The results showed that the increase of MgO content in the raw material had a certain inhibitory effect on the formation of calcium ferrite, especially when the MgO content was 2.0% to 3.0%. The calcium ferrite content in the sinter was significantly reduced, and its crystal morphology also changed from plate columnar and needle-like shape gradually transitioning to an irregular shape. The increase in Al₂O₃ in the raw material promoted the formation of calcium ferrite in the sinter as calcium ferrite content increased significantly with increasing Al₂O₃ and ferric acid contents. The morphology of calcium also changed from columnar and needle-shaped to columnar. Electronic probe composition analysis and mineral chemical formula calculation results show that calcium ferrite is a complex crystal composed of Fe₂O₃, CaO, SiO₂, Al₂O₃ and MgO, and its chemical formula is Ca_2.60Mg_0.44Si_1.07Al_0.96Fe_8.92O₂₀. The changes in MgO and Al₂O₃ contents in the raw materials had little effect on the mole fraction ratio of Fe₂O₃ to CaO in the chemical composition of calcium ferrite, both were close to 3∶2. The above research results are of great guiding significance for an in-depth understanding of the chemical characteristic of calcium ferrite crystal phase under sintering process conditions and its effect on the quality of sinter.

Key words: calcium ferrite, mineralogical property, MgO, Al₂O₃, iron ore sinter

CLC Number:

HAN Xiuli, SI Tianhang, LI Mingduo, ZHOU Xiang, LIU Lei, ZHAO Kai. Influences of MgO and Al₂O₃ on the mineralogical properties of calcium ferrite in iron ore sinter[J]. Earth Science Frontiers, 2020, 27(5): 280-290.

Figures/Tables 16

References 39

[1]	任允芙. 钢铁冶金岩相矿相学[M]. 北京: 冶金工业出版社, 1982.
[2]	郭兴敏. 烧结过程铁酸钙生成及其矿物学[M]. 北京: 冶金工业出版社, 1999.
[3]	张世娟, 王树同. 针状铁酸钙形成机理的试验研究[J]. 钢铁, 1992(7):7-12.
[4]	林淑芳. 低温烧结工艺原理的探讨[J]. 烧结球团, 1986(3):1-9.
[5]	SUGIYAMA K, MONKAWA A, SUGIYAMA T. Crystal structure of the SFCAM phase Ca₂(Ca, Fe, Mg, Al)₆(Fe, Al, Si)₆O₂₀[J]. ISIJ International, 2005, 45(4):560-568. DOI URL
[6]	KIM H S, PARK J H, CHO Y C. Crystal structure of calcium and aluminium silicoferrite in iron ore sinter[J]. Ironmaking & Steelmaking, 2002, 29(4):266-270.
[7]	WEBSTER N A S, POWNCEBY M I, MADSEN I C, et al. Silico-ferrite of calcium and aluminum (SFCA) iron ore sinter bonding phases: new insights into their formation during heating and cooling[J]. Metallurgical and Materials Transactions, 2012, 43(6):1344-1357.
[8]	BAI K K, SHEN J W, ZHU Z L, et al. Effect of Al₂O₃ on the formation of calcium ferrite in the solid state[J]. Metals, 2019, 9(6):681. DOI URL
[9]	汪志全, 庞建明, 禹泽. MgO对烧结矿矿相组成的影响[C]// 全国冶金工艺理论学术会议论文专辑. 北京: 中国金属学会, 2005: 3.
[10]	张俊, 李春增, 朱利, 等. 添加MgO对烧结产物还原性能的影响[J]. 钢铁, 2009, 44(10):6-9.
[11]	姚君豪. 复合添加剂对高MgO烧结矿铁酸钙生成的影响[J]. 烧结球团, 2019, 44(2):5-8.
[12]	姚君豪, 杨军, 韩冬, 等. 添加剂对高MgO烧结矿中铁酸钙生成的影响[J]. 钢铁, 2015, 50(2):12-16, 21.
[13]	YADAV U S, PANDEY B D, DAS B K, et al. Influence of magnesia on sintering characteristics of iron ore[J]. Ironmaking & Steelmaking, 2002, 29(2):91-95.
[14]	郎建峰, 李振国, 张玉柱. MgO对烧结矿质量的影响及MgO与B₂O₃的交互作用[J]. 矿产综合利用, 2000(1):22-25.
[15]	郭贺. MgO对烧结矿强度以及还原熔滴性能影响的机理研究[D]. 沈阳: 东北大学, 2016.
[16]	范晓慧, 李文琦, 甘敏, 等. MgO对高碱度烧结矿强度的影响及机理[J]. 中南大学学报(自然科学版), 2012, 43(9):3325-3330.
[17]	邓涛, 赵凯, 胡长庆, 等. MgO对铁矿粉烧结液相生成的影响[J]. 矿冶工程, 2015, 35(1):80-82, 87.
[18]	潘向阳, 马保良, 龙跃, 等. MgO对铁矿粉烧结液相生成特性的影响[J]. 烧结球团, 2018, 43(6):29-33.
[19]	吴胜利, 韩宏亮, 姜伟忠, 等. 烧结矿中MgO作用机理[J]. 北京科技大学学报, 2009, 31(4):428-432.
[20]	吴胜利, 贝纪承, 朱娟, 等. 化学成分对铁酸盐烧结液相流动性的影响[J]. 钢铁研究学报, 2015, 27(9):7-13.
[21]	张中中, 阮志勇, 罗秀传, 等. MgO对烧结过程及烧结矿性能影响的试验研究[J]. 柳钢科技, 2014(1):5-7, 23.
[22]	胡长庆, 张国柱, 闫龙格. Al₂O₃含量对复合铁酸钙流动性的影响[J]. 矿产综合利用, 2018(2):135-138.
[23]	胡长庆, 杨锦涛, 赵凯, 等. Al₂O₃对铁酸钙生成机理影响[J]. 钢铁钒钛, 2018, 39(4):109-114.
[24]	胡长庆, 闫龙格, 赵凯, 等. Al₂O₃、 MgO交互作用对复合铁酸钙生成影响机理[J]. 中国冶金, 2017, 27(4):5-10, 78.
[25]	刘晓荣, 邱冠周, 蔡汝卓, 等. Al₂O₃/SiO₂对低温烧结成矿规律的影响[J]. 钢铁, 2001(3):5-8.
[26]	刘继彬, 李辽沙. Al₂O₃含量对烧结矿平衡相组成及特性的影响[J]. 安徽工业大学学报(自然科学版), 2009, 26(4):333-337.
[27]	PIMENTA H P, SESHADRI V. Characterisation of structure of iron ore sinter and its behavior during reduction at low temperatures[J]. Ironmaking & Steelmaking, 2002, 29(3):169-174.
[28]	KALENGA M K, CRAIG A M G. Investigation into how the magnesia silica and alumina contents of iron ore sinter influence its mineralogy and properties[J]. The Journal of the Southern African Institute of Mining and Metallurgy, 2010, 110(8):447-456.
[29]	HESSIEN M M, KASHIWAYA Y, ISHII K, et al. Sintering and heating reduction processes of alumina containing iron ore samples[J]. Ironmaking & Steelmaking, 2008, 35(3):191-204.
[30]	孟凡俭, 孙长余, 李廷乐, 等. 烧结矿中复合铁酸钙形成影响因素[J]. 钢铁, 2018, 53(7):16-23.
[31]	孟凡俭. 复合铁酸钙形成影响因素及初渣生成行为研究[D]. 鞍山: 辽宁科技大学, 2018.
[32]	韩秀丽, 王海峰, 刘丽娜, 等. 碱度对钒钛烧结矿显微结构的影响[J]. 钢铁钒钛, 2009, 30(3):56-60.
[33]	刘丽娜, 韩秀丽, 刘磊. 不同类型烧结矿随碱度变化的矿相结构研究[J]. 钢铁钒钛, 2017, 38(2):112-115.
[34]	姚娜, 兴超, 张利武, 等. 不同铝含量烧结矿的矿相组成及对冶金性能的影响[J]. 矿产综合利用, 2018(5):143-147.
[35]	巨建涛, 刘欢, 邢相栋, 等. 高碱度烧结矿矿物结构对其冶金性能的影响[J]. 钢铁研究, 2017, 45(3):9-13.
[36]	林师整. 磁铁矿矿物化学、成因及演化的探讨[J]. 矿物学报, 1982(3):166-174.
[37]	董斌斌, 黎广荣, 郭福生, 等. 磁铁矿中硅的赋存状态研究进展: 兼论新疆雅满苏铁矿床中磁铁矿晶体化学特征[J]. 高校地质学报, 2017, 23(2):213-226.
[38]	MUMME W G, CLOUT J M F, GABLE R W. The crystal structure of SFCA-I, Ca_3.18Fe³⁺_14.66Al_1.34Fe²⁺_0.82O₂₈,a homologue of theaenigmatite structure type, and new crystal structure refinements of β-CFF, Ca_2.99Fe³⁺_14.30Fe²⁺_0.55O₂₅ and Mg-free SFCA, Ca_2.45Fe³⁺_9.04Al_1.74Fe²⁺_0.16Si_0.6O₂₀[J]. Neues Jahrbuch für Mineralogie-Abhandlungen, 1998, 173(1):93-117. DOI URL
[39]	POWNCEBY M I, PATRICK T R C. Stability of SFC (silico-ferrite of calcium): solid solution limits, thermal stability and selected phase relationships within the Fe₂O₃-CaO-SiO₂ (FCS) system[J]. European Journal of Mineralogy, 2000, 12(2):455-468. DOI URL

编号	w_B/%					碱度
编号	Fe₃O₄	SiO₂	CaO	MgO	Al₂O₃	碱度
M1.0	82.5	5.0	10.0	1.0	1.5	2.0
M1.5	82.0	5.0	10.0	1.5	1.5	2.0
M2.0	81.5	5.0	10.0	2.0	1.5	2.0
M2.5	81.0	5.0	10.0	2.5	1.5	2.0
M3.0	80.5	5.0	10.0	3.0	1.5	2.0
A1.0	82.5	5.0	10.0	1.5	1.0	2.0
A1.5	82.0	5.0	10.0	1.5	1.5	2.0
A2.0	81.5	5.0	10.0	1.5	2.0	2.0
A2.5	81.0	5.0	10.0	1.5	2.5	2.0
A3.0	80.5	5.0	10.0	1.5	3.0	2.0

编号	w_B/%					碱度
编号	Fe₃O₄	SiO₂	CaO	MgO	Al₂O₃	碱度
M1.0	82.5	5.0	10.0	1.0	1.5	2.0
M1.5	82.0	5.0	10.0	1.5	1.5	2.0
M2.0	81.5	5.0	10.0	2.0	1.5	2.0
M2.5	81.0	5.0	10.0	2.5	1.5	2.0
M3.0	80.5	5.0	10.0	3.0	1.5	2.0
A1.0	82.5	5.0	10.0	1.5	1.0	2.0
A1.5	82.0	5.0	10.0	1.5	1.5	2.0
A2.0	81.5	5.0	10.0	1.5	2.0	2.0
A2.5	81.0	5.0	10.0	1.5	2.5	2.0
A3.0	80.5	5.0	10.0	1.5	3.0	2.0

样号	黏结相含量/%			金属相含量/%		其他含量/%
样号	铁酸钙	玻璃质	硅酸二钙	磁铁矿	赤铁矿	氧化钙
M1.0	40~45	5~10	微量	25~30	20~25	微量
M1.5/ A1.5	35~40	5~10	微量	35~40	15~20	微量
M2.0	35~40	5~10	1~2	40~45	10~15	微量
M2.5	30~35	5~10	1~2	45~50	10~15	微量
M3.0	25~30	5~10	2~3	55~60	5~10	微量
A1.0	25~30	10~15	微量	35~40	15~20	3~5
A2.0	40~45	5~8	微量	35~40	10~15	微量
A2.5	45~50	5~8	微量	30~35	10~15	微量
A3.0	50~55	3~5	微量	25~30	10~15	3~5

样号	黏结相含量/%			金属相含量/%		其他含量/%
样号	铁酸钙	玻璃质	硅酸二钙	磁铁矿	赤铁矿	氧化钙
M1.0	40~45	5~10	微量	25~30	20~25	微量
M1.5/ A1.5	35~40	5~10	微量	35~40	15~20	微量
M2.0	35~40	5~10	1~2	40~45	10~15	微量
M2.5	30~35	5~10	1~2	45~50	10~15	微量
M3.0	25~30	5~10	2~3	55~60	5~10	微量
A1.0	25~30	10~15	微量	35~40	15~20	3~5
A2.0	40~45	5~8	微量	35~40	10~15	微量
A2.5	45~50	5~8	微量	30~35	10~15	微量
A3.0	50~55	3~5	微量	25~30	10~15	3~5

样号	铁酸钙体积分数/%
样号	总量	针状	柱状	不规则状
M1.0	40~45	15~20	10~15	10~15
M1.5/A1.5	35~40	15~20	10~15	5~10
M2.0	35~40	10~15	15~20	5~10
M2.5	30~35	5~10	10~15	10~15
M3.0	25~30	5~10	10~15	5~10
A1.0	25~30	10~15	5~10	5~10
A2.0	40~45	15~20	15~20	5~10
A2.5	45~50	10~15	10~15	20~25
A3.0	50~55	5~10	15~20	25~30

Influences of MgO and Al₂O₃ on the mineralogical properties of calcium ferrite in iron ore sinter

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 16

References 39

Related Articles 15

Recommended Articles

Metrics

Comments

样号	序号	w_B/%						备注
样号	序号	Fe₂O₃	CaO	MgO	SiO₂	Al₂O₃	合计	备注
M1.0	1	82.69	9.77	3.05	1.80	3.99	101.30	柱状
	2	81.66	10.08	2.91	2.01	4.19	100.85	柱状
	3	77.33	12.91	1.95	3.63	4.57	100.39	针状
	4	79.72	10.37	2.77	2.44	4.79	100.09	它形
M1.5	5	67.16	16.94	2.43	8.08	4.10	98.71	柱状
M1.5	6	70.61	15.09	2.45	5.66	4.65	98.46	它形
M2.0	7	72.37	15.30	1.52	7.15	3.88	100.22	针状
	8	72.12	15.88	1.61	7.11	3.93	100.65	柱状
	9	72.64	15.57	1.63	7.09	4.30	101.23	它形
	10	69.22	18.13	1.47	8.58	3.95	101.35	它形
M2.5	11	78.21	11.66	1.82	3.90	3.80	99.39	针状
	12	77.31	12.38	1.29	3.82	3.67	98.47	柱状
	13	77.65	12.60	1.22	4.09	3.87	99.43	它形
	14	77.61	11.69	1.43	3.91	3.79	98.43	它形
M3.0	15	73.78	15.59	1.20	6.74	3.72	101.03	柱状
	16	74.07	15.56	1.27	6.97	3.81	101.68	针状
	17	73.82	15.46	1.19	6.91	3.19	100.57	它形
	18	73.24	15.79	1.30	6.99	3.43	100.75	它形
	19	72.51	16.19	1.04	6.85	3.82	100.41	它形
	20	72.53	16.17	1.02	6.81	4.07	100.60	它形

[1]	CHEN Guochao, ZHANG Xiaofei, PEI Xianzhi, PEI Lei, LI Zuochen, LIU Chengjun, LI Ruibao. Geochemical characteristics, genesis and geological significance of Quedingbu-Luqu peridotites in the Xigaze area, middle Yarlung Zangbo suture zone [J]. Earth Science Frontiers, 2024, 31(3): 1-19.
[2]	NIE Xiao, CHEN Lei, GUO Xianqing, YU Tao, WANG Zongqi. Geochemical analysis of apatite and columbite-group minerals of beryl-columbite pegmatites in Ningshan, southern Qinling orogen, China [J]. Earth Science Frontiers, 2023, 30(5): 115-133.
[3]	HONG Tao, ZHAI Mingguo, WANG Yuejun, LIU Xingcheng, XU Xingwang, GAO Jun, HU Mingxi, MA Jing. Coupling relationship between the stability of Li/Be complexes and Li/Be differential enrichment in granitic pegmatites—an experimental study [J]. Earth Science Frontiers, 2023, 30(5): 93-105.
[4]	DU Baisong, ZHU Guangyou, LIU Shufei, WANG Yehan, YU Bingsong, XU Kexin. Key factors and mechanisms affecting calcite growth and dissolution-a critical review [J]. Earth Science Frontiers, 2023, 30(4): 335-351.
[5]	XIAO Xuewei, CHEN Honghan, LIU Xiuyan, PENG Zhongqin, LI Peijun, WANG Baozhong. Fluid inclusion evidence on the shale gas formation process in the Lower Cambrian Niutitang Formation in Jishou slope zone, western Hunan Province—a case study of well XJD 1 [J]. Earth Science Frontiers, 2023, 30(3): 181-194.
[6]	SHEN Junfeng, YAN Guoying, ZHANG Mengmeng, WANG Zhaojing, XU Kexin, MENG Wenxiang. REE enrichment process in the Bayan Obo Fe-REE-Nb deposit: Genetic and mineralogical evidence [J]. Earth Science Frontiers, 2023, 30(2): 370-383.
[7]	CUI Xiaoliang, SU Shangguo, ZHANG Yanan, CHEN Xuegen, SI Xiaobo, HUO Xiaoyan. Deep magmatic process of the Fushan complex in the southern section of Taihang Mountain, Hebei Province and its tectonic significance [J]. Earth Science Frontiers, 2022, 29(1): 342-363.
[8]	FAN Fu, HOU Xianhua, ZHENG Mianping, MENG Fanwei, YANG Zhenjing, MIAO Qing. Homogenization temperature of fluid inclusions in Early-Middle Pleistocene halite from Liang Hole ZK02 in Dalangtan area, Qaidam Basin and its constraints on potash mineralization [J]. Earth Science Frontiers, 2021, 28(6): 105-114.
[9]	NI Yanhua, LI Minghui, FANG Xiaomin, MENG Fanwei, YAN Maodu, LIU Yingxin. Paleotemperature during the Mid-Pleistocene Transition in western Qaidam Basin: Evidence from fluid inclusions in halite from drill hole SG-1 [J]. Earth Science Frontiers, 2021, 28(6): 115-124.
[10]	LI Shengrong, SHEN Junfeng, LI Lin, ZHANG Huafeng. Considerations on big data-based genetic mineralogical research [J]. Earth Science Frontiers, 2021, 28(3): 76-86.
[11]	LONG Zhengyu, YU Xiaoyan, ZHENG Yuyu, GUO Bijun. Geochemical characteristics of tourmalines from the Dayakou emerald deposit in Yunnan Province: implications for emerald mineralization [J]. Earth Science Frontiers, 2021, 28(2): 333-347.
[12]	LI Ruipeng, CUI Xiaoliang, SU Shangguo, ZHANG Yanan, LIANG Cuntao, CHEN Xuegen. Discussion on the features and mechanism of cryptoexplosive breccia in Wu’an, Hebei Province [J]. Earth Science Frontiers, 2021, 28(1): 353-362.
[13]	LU Anhuai, LI Yan, DING Hongrui, WANG Changqiu, XU Xiaoming, LIU Feifei, LIU Yuwei, ZHU Ying, LI Yanzhang. Natural mineral photoelectric effect: non-classical mineral photosynthesis [J]. Earth Science Frontiers, 2020, 27(5): 179-194.
[14]	ZHANG Juquan, LIANG Xian, YAN Lina, LI Shengrong, SHEN Junfeng, LU Jing, WU Weizhe, LI Qing. The mineralogical records of magmatic process: cases from Mesozoic intrusive rocks in the Handan-Xingtai region [J]. Earth Science Frontiers, 2020, 27(5): 70-87.
[15]	LUO Zhaohua. Mineralogical constraints on the formation of cumulates in layered intrusions in the Pan-Xi region, Sichuan Province, China [J]. Earth Science Frontiers, 2020, 27(5): 61-69.

样号	序号	w_B/%						备注
样号	序号	Fe₂O₃	CaO	MgO	SiO₂	Al₂O₃	合计	备注
A1.0	1	70.42	15.92	1.70	6.86	3.11	98.01	柱状
	2	70.48	15.5	2.32	7.37	2.46	98.13	柱状
	3	70.26	15.49	2.16	7.99	2.70	98.60	针状
	4	69.57	15.77	0.96	7.63	3.01	96.94	它形
A1.5	5	67.16	16.94	2.43	8.08	4.10	98.71	柱状
A1.5	6	70.61	15.09	2.45	5.66	4.65	98.46	针状
A2.0	7	69.87	15.81	1.04	7.98	6.30	101.00	针状
	8	69.75	16.10	0.89	8.05	6.11	100.90	柱状
	9	69.10	15.26	1.67	8.94	4.45	99.42	它形
	10	69.08	15.86	1.29	8.74	6.76	101.73	它形
A2.5	11	68.99	15.40	2.17	7.74	6.25	100.55	柱状
	12	68.69	15.39	1.72	7.04	8.23	101.07	柱状
	13	69.44	14.46	2.27	6.65	7.19	100.01	针状
	14	70.32	14.29	2.09	6.52	7.22	100.44	它形
	15	68.13	14.78	1.89	6.84	7.82	99.46	它形
A3.0	16	61.56	15.36	1.40	9.38	10.99	98.69	柱状
A3.0	17	61.15	15.27	1.51	9.46	11.15	98.54	它形

样号	序号	w_B/%						备注
样号	序号	Fe₂O₃	CaO	MgO	SiO₂	Al₂O₃	合计	备注
A1.0	1	70.42	15.92	1.70	6.86	3.11	98.01	柱状
	2	70.48	15.5	2.32	7.37	2.46	98.13	柱状
	3	70.26	15.49	2.16	7.99	2.70	98.60	针状
	4	69.57	15.77	0.96	7.63	3.01	96.94	它形
A1.5	5	67.16	16.94	2.43	8.08	4.10	98.71	柱状
A1.5	6	70.61	15.09	2.45	5.66	4.65	98.46	针状
A2.0	7	69.87	15.81	1.04	7.98	6.30	101.00	针状
	8	69.75	16.10	0.89	8.05	6.11	100.90	柱状
	9	69.10	15.26	1.67	8.94	4.45	99.42	它形
	10	69.08	15.86	1.29	8.74	6.76	101.73	它形
A2.5	11	68.99	15.40	2.17	7.74	6.25	100.55	柱状
	12	68.69	15.39	1.72	7.04	8.23	101.07	柱状
	13	69.44	14.46	2.27	6.65	7.19	100.01	针状
	14	70.32	14.29	2.09	6.52	7.22	100.44	它形
	15	68.13	14.78	1.89	6.84	7.82	99.46	它形
A3.0	16	61.56	15.36	1.40	9.38	10.99	98.69	柱状
A3.0	17	61.15	15.27	1.51	9.46	11.15	98.54	它形