Effect of replacing Australian low-alumina iron ore fines with specific high-alumina iron ore fines on high-temperature sintering properties
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摘要: 澳洲某优质低铝铁矿粉OE是国内钢铁企业主要原料之一，其资源面临逐渐枯竭的挑战。OA铁矿粉因具备一定价格优势且资源充足，成为替代OE的选项之一，然而OA铁矿粉的Al2O3较高，因此如何高效使用OA矿粉替代低铝OE矿粉，已成为当前钢铁行业关注的热点。采用微型烧结方法，系统探究OA部分及完全替代OE后，烧结混匀矿的液相流动性、粘结相自身强度以及铁酸钙与高铝脆性物生成特性变化规律。与OE矿粉相比，OA矿粉的同化温度较高，液相流动能力较强，两者的粘结相自身强度较为接近。随着OA替代OE比例的升高，混匀矿的液相流动性指数及粘结相自身强度逐渐升高，但混匀矿中铁酸钙含量随OA替代比例增加而逐渐降低。XRD矿相结构分析表明，OA替代OE比例的升高，使得铁酸钙含量降低但高铝脆性物增加。由于OA矿粉的Al2O3含量较高，过量配加OA矿易抑制铁酸钙生成并导致高铝脆性物形成。因此，实际生产中，需精准调控OA替代OE比例，以提升高铝混匀矿的烧结性能，强化后续高炉冶炼的稳定性。Abstract: A type of high-quality low-aluminum iron ore fines（OE）from Australia has been served as one of the core raw materials in the production of domestic iron and steel enterprises. However, its reserves are gradually being depleted. OA iron ore fines have emerged as one of the potential alternatives to OE due to their favorable price advantage and abundant reserves. Nevertheless, OA iron ore fines exhibit a relatively high Al2O3 content. Therefore, how to efficiently utilize OA iron ore fines as a substitute for the low-aluminum OE has become a key research focus in the iron and steel industry. In this study, the mini-sintering method was employed to systematically investigate the variation patterns of the liquid phase fluidity index, intrinsic strength of bonding phase, and formation characteristics of calcium ferrite and high-alumina brittle phases in sintered blended ore after partial or complete replacement of OE with OA. Compared with OE iron ore fines, OA iron ore fines exhibit a higher assimilation temperature and better liquid phase fluidity, whereas their bonding phase strengths are relatively similar. As the OA replacement ratio for OE increases, the liquid phase fluidity index and intrinsic strength of bonding phase of the blended ore increase progressively, whereas the calcium ferrite content decreases correspondingly. X-ray diffraction (XRD) mineral phase analysis reveals that an increase in the OA replacement ratio results in a reduction in calcium ferrite content but an increase in high-alumina brittle phases. Given the high Al2O3 content of OA iron ore fines, excessive incorporation of OA tends to inhibit calcium ferrite formation and promote the formation of high-alumina brittle phases. Therefore, in practical production, precise control of the OA replacement ratio is essential to improve the sintering performance of high-aluminum blended ore and enhance the stability of subsequent blast furnace smelting.
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图 1 铁矿粉的烧结基础特性试验控制条件
Figure 1. Experimental control conditions for basic sintering properties of iron ore fines
图 4 铁矿粉SiO2含量对其液相流动性指数的影响
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1280 ℃；(b)1320 ℃Figure 4. The impact of silicon dioxide content in iron ore fines on the liquid phase fluidity index
图 6 铁矿粉SiO2含量对其粘结相自身强度的影响
Figure 6. The influence of SiO2 content in iron ore fines on the intrinsic strength of their bonding phase
图 7 OA替代OE后混匀矿的烧结基础特性
Figure 7. Basic sintering properties of the blended ore after OA replacing OE
图 8 OA替代OE后混匀矿的铁酸钙生成特性
(a)基准案例铁酸钙分布（绿）；(b)方案1铁酸钙分布（绿）；(c)方案2铁酸钙分布（绿）；(d)方案3铁酸钙分布（绿）
Figure 8. Calcium ferrite formation characteristics of the blended ore after OA replacing OE
图 9 OA替代OE后混匀矿的X射线衍射图
Figure 9. X-ray diffraction pattern of blended iron ore after replacing OE with OA
表 1 试验用铁矿粉的化学成分
Table 1. Chemical compositions of experimental iron ore fines
% Ores TFe SiO2 MgO Al2O3 TiO2 FeO Loss on ignition OA 58.02 4.36 0.12 2.95 0.16 0.24 9.00 OB 61.79 3.43 0.08 2.25 0.09 0.24 4.75 OC 56.26 6.57 0.10 3.00 0.20 0.21 8.20 OD 58.49 5.50 0.10 3.20 0.19 0.30 7.00 OE 56.20 5.72 0.14 1.60 0.08 0.32 11.30 OF 57.50 6.10 0.02 2.70 0.15 0.22 7.10 OG 57.50 6.28 0.14 3.03 0.21 0.54 6.50 OH 56.80 12.00 0.28 2.30 0.30 1.24 4.20 OI 65.07 2.38 0.01 1.22 0.07 1.18 4.67 OJ 61.63 8.19 0.11 1.11 0.16 3.15 2.20 OK 63.00 8.07 0.05 0.45 0.12 2.43 0.40 OL 61.93 7.56 0.14 1.22 0.11 1.49 2.55 OM 69.60 1.40 0.43 0.26 0.07 29.50 -2.5 
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表 2 OA替代OE混匀矿的配矿结构
Table 2. Ore blending structure of the blended ore with OA replacing OE
% Experimental scheme OA OB OC OD OE OF OG OH OI OJ OK OL OM Total Baseline scheme 1.50 7.50 11.50 3.00 14.00 6.00 4.50 18.00 17.00 1.00 1.00 1.00 14.00 100.00 Scheme 1 6.50 7.50 11.50 3.00 9.00 6.00 4.50 18.00 17.00 1.00 1.00 1.00 14.00 100.00 Scheme 2 11.50 7.50 11.50 3.00 4.00 6.00 4.50 18.00 17.00 1.00 1.00 1.00 14.00 100.00 Scheme 3 15.50 7.50 11.50 3.00 0.00 6.00 4.50 18.00 17.00 1.00 1.00 1.00 14.00 100.00
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表 3 OA替代OE后混匀矿的化学成分
Table 3. Chemical compositions of the blended ore after OA replacing OE
% TFe SiO2 CaO MgO Al2O3 K2O Na2O ZnO S P TiO2 FeO C Baseline scheme 64.22 6.56 0.19 0.14 1.96 0.03 0.02 0.01 0.04 0.05 0.14 4.87 0.12 Scheme 1 64.17 6.52 0.19 0.14 2.03 0.03 0.02 0.01 0.04 0.05 0.14 4.86 0.11 Scheme 2 64.11 6.47 0.20 0.13 2.10 0.03 0.02 0.01 0.04 0.06 0.13 4.84 0.09 Scheme 3 64.07 6.44 0.20 0.13 2.16 0.03 0.02 0.01 0.04 0.06 0.13 4.83 0.08
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表 4 OA替代OE后混匀矿的铁酸钙含量
Table 4. Calcium ferrite content of the blended iron ore after replacing OE with OA
% Baseline scheme Scheme 1 Scheme 2 Scheme 3 15.31 14.07 12.22 11.46
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[1] KOU M Y, ZHANG Z, ZENG W, et al. Research progress on optimization technology and its model of ore-blending for sinter process[J]. Iron & Steel, 2022, 57(2): 1-11. (寇明银, 张众, 曾旺, 等. 铁矿粉烧结优化配矿及其模型研究进展[J]. 钢铁, 2022, 57(2): 1-11.KOU M Y, ZHANG Z, ZENG W, et al. Research progress on optimization technology and its model of ore-blending for sinter process[J]. Iron & Steel, 2022, 57（2）: 1-11. [2] SU Y C, SUN G P, JIN B T, et al. Influence of types and components of iron ore power on its sintering basic characteristics[J]. Journal of Chongqing University of Science and Technology (Natural Science Edition), 2024, 26(2): 94-99. (苏永仓, 孙高鹏, 金炳彤, 等. 铁矿粉种类和成分对其烧结基础特性的影响[J]. 重庆科技学院学报(自然科学版), 2024, 26(2): 94-99.SU Y C, SUN G P, JIN B T, et al. Influence of types and components of iron ore power on its sintering basic characteristics[J]. Journal of Chongqing University of Science and Technology (Natural Science Edition), 2024, 26（2）: 94-99. [3] LIU S, ZHAO Y D, GAN L, et al. Discussion on intelligent manufacturing of sintering system and application of big data technology[J]. Iron & Steel, 2021, 56(10): 54-64. (刘颂, 赵亚迪, 甘丽, 等. 烧结系统智能制造与大数据技术应用探讨[J]. 钢铁, 2021, 56(10): 54-64.LIU S, ZHAO Y D, GAN L, et al. Discussion on intelligent manufacturing of sintering system and application of big data technology[J]. Iron & Steel, 2021, 56（10）: 54-64. [4] HOU J, BAI C G, HU M L, et al. Optimization on ore-blending of PMC concentrate and two typical limonite ores[J]. Iron & Steel, 2023, 58(6): 45-52, 60. (侯健, 白晨光, 扈玫珑, 等. 南非PMC精粉与两种典型褐铁矿的配矿优化[J]. 钢铁, 2023, 58(6): 45-52, 60.HOU J, BAI C G, HU M L, et al. Optimization on ore-blending of PMC concentrate and two typical limonite ores[J]. Iron & Steel, 2023, 58（6）: 45-52, 60. [5] ZHOU M S, WANG Y D, ZHAO D M, et al. Development on sintering technologies with high proportion of magnetite concentrates[J]. Iron & Steel, 2020, 55(5): 1-9. (周明顺, 王义栋, 赵东明, 等. 高配比磁铁精矿烧结技术的研究进展[J]. 钢铁, 2020, 55(5): 1-9.ZHOU M S, WANG Y D, ZHAO D M, et al. Development on sintering technologies with high proportion of magnetite concentrates[J]. Iron & Steel, 2020, 55（5）: 1-9. [6] TANG J, WANG M Y, CHU M S, et al. Process of ore blending optimization in sintering at home and abroad[J]. Iron & Steel, 2024, 59(9): 102-113. (唐珏, 王茗玉, 储满生, 等. 国内外烧结优化配矿研究进展[J]. 钢铁, 2024, 59(9): 102-113.TANG J, WANG M Y, CHU M S, et al. Process of ore blending optimization in sintering at home and abroad[J]. Iron & Steel, 2024, 59（9）: 102-113. [7] FANG L, WANG P, SUN S S, et al. Practice of increasing proportion of non-primary ore and economic ore in sintering[J]. Sintering and Pelletizing, 2024, 49(4): 26-32, 43. (方亮, 王平, 孙社生, 等. 烧结提高非主流矿与经济矿比例实践[J]. 烧结球团, 2024, 49(4): 26-32, 43.FANG L, WANG P, SUN S S, et al. Practice of increasing proportion of non-primary ore and economic ore in sintering[J]. Sintering and Pelletizing, 2024, 49（4）: 26-32, 43. [8] MA Y F, LI Q, ZHANG J L, et al. Synergistic optimization model of sintering ore allocation cost and energy consumption based on PSO-VIKOR[J]. Chinese Journal of Engineering, 2023, 45(11): 1868-1877. (马云飞, 李擎, 张建良, 等. 基于PSO–VIKOR的烧结配矿成本与能耗协同优化模型[J]. 工程科学学报, 2023, 45(11): 1868-1877.MA Y F, LI Q, ZHANG J L, et al. Synergistic optimization model of sintering ore allocation cost and energy consumption based on PSO-VIKOR[J]. Chinese Journal of Engineering, 2023, 45（11）: 1868-1877. [9] SUN C H. Research on optimization of iron ore blending andthermal strength of sinter based on high temperaturebasic characteristics of iron ore concentrate[D]. Maanshan: Anhui University of Technology, 2022. (孙彩虹. 基于高温基础特性优化配矿及烧结矿热态强度研究[D]. 马鞍山: 安徽工业大学, 2022.SUN C H. Research on optimization of iron ore blending andthermal strength of sinter based on high temperaturebasic characteristics of iron ore concentrate[D]. Maanshan: Anhui University of Technology, 2022. [10] CHEN D F. Optimize blending and ore distribution to improve sinter quality[J]. Metallurgy and materials, 2022, 14(1): 9-10. (陈东峰. 优化混匀配矿提高烧结矿质量[J]. 冶金与材料, 2022, 14(1): 9-10.CHEN D F. Optimize blending and ore distribution to improve sinter quality[J]. Metallurgy and materials, 2022, 14(1): 9-10. [11] ZHANG W H, LIU H L, SHEN H L, et al. Optimization of sinter ore blending and coping practice of blast furnace[J]. Metal World, 2022, (1): 45-49. (张卫华, 刘怀路, 沈洪流, 等. 烧结配矿优化及高炉生产应对实践[J]. 金属世界, 2022, (1): 45-49.ZHANG W H, LIU H L, SHEN H L, et al. Optimization of sinter ore blending and coping practice of blast furnace[J]. Metal World, 2022, (1): 45-49. [12] REN Q, WANG Y C, LUO G P, et al. Experimental study on basic sintering characteristics and optimum ore blending schemeof iron ore powder[J]. Sintering and Pelletizing, 2020, 45(2): 26-30. (任强, 王艺慈, 罗果萍, 等. 铁矿粉的烧结基础特性及最佳配矿试验研究[J]. 烧结球团, 2020, 45(2): 26-30.REN Q, WANG Y C, LUO G P, et al. Experimental study on basic sintering characteristics and optimum ore blending schemeof iron ore powder[J]. Sintering and Pelletizing, 2020, 45(2): 26-30. [13] CAO Y, WU S, HAN H, et al. Mixed state and high effective utilization of pilbara blending iron ore powder[J]. Journal of Iron and Steel Research International, 2011, 18(9): 1-5. doi: 10.1016/s1006-706x(12)60026-0 [14] LÜ X F, HAN H L, WU S L. Research on ore-proportioning optimization technology in sintering[J]. Applied Mechanics and Materials, 2012, 117: 980-983. doi: 10.4028/www.scientific.net/amm.117-119.980 [15] LI G D. Experimental study on sintering of FMG blend fines instead of yandi fines[J]. Heavy Machinery, 2024, (6): 60-63. (李国栋. FMG混合粉替代YD矿粉的烧结试验研究[J]. 重型机械, 2024, (6): 60-63.LI G D. Experimental study on sintering of FMG blend fines instead of yandi fines[J]. Heavy Machinery, 2024, (6): 60-63. [16] WANG N, ZHAO W, LU K, et al. Research on ore blending using ukrainian refined powder as a substitute for some card powder[J]. Shanxi Metallurgy, 2025, 48(2): 19-22, 25. (王宁, 赵伟, 卢宽, 等. 乌克兰精粉替代部分卡粉的配矿研究[J]. 山西冶金, 2025, 48(2): 19-22, 25.WANG N, ZHAO W, LU K, et al. Research on ore blending using ukrainian refined powder as a substitute for some card powder[J]. Shanxi Metallurgy, 2025, 48(2): 19-22, 25. [17] ZHAO H B, JIANG X, HE L, et al. Low-cost sintering ore blending[J]. Hebei Metallurgy, 2025(1): 55-61. (赵鸿波, 姜鑫, 何亮, 等. 基于优质低成本的烧结配矿[J]. 河北冶金, 2025(1): 55-61.ZHAO H B, JIANG X, HE L, et al. Low-cost sintering ore blending[J]. Hebei Metallurgy, 2025（1）: 55-61. [18] LI B, ZHOU H, HUAN J, et al. Optimization of iron ore blending based on replacing Australian low alumina limonite[J]. Journal of Iron and Steel Research International, 2023, 30(9): 1675-1686. [19] FANG Y H, NIU C S, WANG J Y, et al. Research on sintering and blending of new varieties of ores based onhigh temperature characteristics to replace deteriorated ore[J]. Sintering and Pelletizing, 2025, 50(5): 35-42. ) (方叶晗, 牛长胜, 王纪元, 等. 基于高温特性的新品种矿替代劣化矿烧结配矿研究[J]. 烧结球团, 2025, 50(5): 35-42.FANG Y H, NIU C S, WANG J Y, et al. Research on sintering and blending of new varieties of ores based onhigh temperature characteristics to replace deteriorated ore[J]. Sintering and Pelletizing, 2025, 50(5): 35-42. ) [20] WU S L, SU B, QI Y H , et al. Major melt formation characteristic factor analysis of iron ore liquid phase fluidity during the sintering process[J]. Chinese Journal of Engineering, 2018, 40(3): 321-329. ). (吴胜利, 苏博, 齐渊洪, 等. 铁矿粉液相流动性的主要液相生成特征因素解析[J]. 工程科学学报, 2018, 40(3): 321-329.WU S L, SU B, QI Y H , et al. Major melt formation characteristic factor analysis of iron ore liquid phase fluidity during the sintering process[J]. Chinese Journal of Engineering, 2018, 40(3): 321-329. ). [21] YAN L J, WU S L, YOU Y, et al. Assimilation of iron ores and orematching method based on complementary assimilation[J]. Joumal of University of Science and Technology Beijing, 2010, 32(3): 298-305. (阎丽娟, 吴胜利, 尤艺, 等. 各种铁矿粉的同化性及其互补配矿方法[J]. 北京科技大学学报, 2010, 32(3): 298-305.YAN L J, WU S L, YOU Y, et al. Assimilation of iron ores and orematching method based on complementary assimilation[J]. Joumal of University of Science and Technology Beijing, 2010, 32（3）: 298-305. [22] LI J C, YIN F Y, LI F M, et al. Sintering basic characteristies of blending iron ore[J]. Iron and Steel, 2013, 48(5): 7-10, 40. (李建朝, 伊凤永, 李福民, 等. 混合铁矿粉的烧结基础特性[J]. 钢铁, 2013, 48(5): 7-10, 40.LI J C, YIN F Y, LI F M, et al. Sintering basic characteristies of blending iron ore[J]. Iron and Steel, 2013, 48（5）: 7-10, 40. [23] WU S L, DU J X, MA H B, et al. Self-intensity of binding phase in iron ores during sintering[J]. Joumal of University of Science and Technology Beijing, 2005(2): 169-172. (吴胜利, 杜建新, 马洪斌, 等. 铁矿粉烧结粘结相自身强度特性[J]. 北京科技大学学报, 2005(2): 169-172.WU S L, DU J X, MA H B, et al. Self-intensity of binding phase in iron ores during sintering[J]. Joumal of University of Science and Technology Beijing, 2005（2）: 169-172. [24] LI H X, WU S L, LI Q. Experimental study on iron ore sintering basic characteristics of Yangdi[J]. Shandong Metallurgy, 2007(1): 30-32. (李海霞, 吴胜利, 李强. 扬迪矿烧结基础特性的试验研究[J]. 山东冶金, 2007(1): 30-32.LI H X, WU S L, LI Q. Experimental study on iron ore sintering basic characteristics of Yangdi[J]. Shandong Metallurgy, 2007（1）: 30-32. [25] WARE N, MANUEL J. Fundamental nucleus assimilation behaviour of haematite and goethite containing ores in iron ore sintering[J]. Mineral Processing and Extractive Metallurgy, 2016, 125(3): 149-155. [26] LÜ X, BAI C, DENG Q, et al. Behavior of liquid phase formation during iron ores sintering[J]. ISIJ international, 2011, 51(5): 722-727. [27] DING X. Study of the mechanism on formation of calcium ferrite in the Fe2O3-CaO-SiO2 system[D]. Beijing: University of Science and Technology Beijing, 2015. (丁祥. Fe2O3-CaO-SiO2系铁酸钙(SFC)生成机理研究[D]. 北京: 北京科技大学, 2015.DING X. Study of the mechanism on formation of calcium ferrite in the Fe2O3-CaO-SiO2 system[D]. Beijing: University of Science and Technology Beijing, 2015. -
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