基于<i>RDI</i><sub>＞3.15 mm</sub>响应面法的烧结原料配矿方案优化

doi:10.13228/j.boyuan.issn0449-749x.20220482

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Abstract The sinter is prone to fragmentation and pulverization under the low temperature reduction atmosphere of blast furnace, which will seriously affect the permeability of blast furnace and destroy the smooth operation of blast furnace. Low temperature reduction degradation index(RDI_{＞3.15 mm}) is an important index to reflect the occurrence degree of low temperature reduction pulverization of sinter, but its size is affected by the main factors such as MgO, Al₂O₃ and alkalinity R in sintering raw materials. In order to explore the influence and interaction of sintering raw material composition factors on the low-temperature reduction and pulverization performance of sintered ore, an optimization method of sintering raw material blending based on RDI_{＞3.15 mm} response surface was proposed. Firstly, with w(MgO), w(Al₂O₃), and the basicity R as independent variables, and with the sinter RDI_{＞3.15 mm} index as the response value, the sinter RDI_{＞3.15 mm} index was established. Secondly, the sinter RDI_{＞3.15 mm} index obtained from the experiment was fitted to obtain the prediction formula of the sinter RDI_{＞3.15 mm} index. Finally, the sinter was made by the optimal raw material ratio and its RDI_{＞3.15 mm} index was measured. The RDI_{＞3.15 mm} index verifies the accuracy of the proposed method. The results show that the fitting degree R² of the new model to the sinter RDI_{＞3.15 mm} index is 0.990 4, and the correction coefficient R²_adj is 0.978 0, indicating that the predicted value fits the actual value well, and the sinter RDI_>3.15 _mm response surface model is proved. It is statistically significant; the significant degree of influence of each factor on the sinter RDI_{＞3.15 mm} index is w(MgO) > basicity R > w(Al₂O₃), and w(MgO) and w(Al₂O₃), w(MgO) and alkalinity R, w(Al₂O₃) and alkalinity R have significant interaction between two factors; The determined optimal raw material ratio is w(MgO) of 2.66%, w(Al₂O₃) of 2.02%, and alkalinity R of 2.2. Based on the prediction formula and experiment of RDI_{＞3.15 mm} index, the optimal raw material ratio conditions are obtained. The measured value (74.51%) of the lower sinter RDI_{＞3.15 mm} is basically consistent with the predicted value (74.21%). The new method of sintering and ore blending optimization introduced provides a theoretical basis for improving the performance of sintered ore reduction and pulverization at low temperature.

Key words： sinter low-temperature reduction degradation response surface optimization mathematical model interaction

Received: 15 July 2022

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	BAO Guo-ying
	LIU Lei
	HAN Xiu-li
	DUAN Bo-wen
	QIN Li-wen

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BAO Guo-ying,LIU Lei,HAN Xiu-li等. Optimization of sintering raw material blending scheme based on RDI_{＞3.15 mm} response surface methodology[J]. Iron and Steel, 2023, 58(1): 31-38.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20220482 OR http://www.chinamet.cn/Jweb_gt/EN/Y2023/V58/I1/31

[1] 任允芙. 钢铁冶金岩相矿相学[M]. 北京:冶金工业出版社,1982.(REN Yun-fu. Lithofacies and Metallography of Iron and Steel[M].Beijing:Metallurgical Industry Press,1982.)
[2] 周祥. Mg/Al在烧结矿中的赋存规律对其冶金性能的影响[D].唐山:华北理工大学,2020.(ZHOU Xiang. Influence of the Occurrence Regularity of Mg and Al in Sinter on Metallurgical Properties[D].Tangshan:North China University of Science and Technology,2020.)
[3] 李志民, 刘丽娜, 段珊,等. MgO对含钛烧结矿矿相结构的影响[J]. 钢铁钒钛,2014,35(3):69.(LI Zhi-min, LIU Li-na, DUAN Shan, et al. Influence of MgO on structure of vanadium-titanium sinter[J]. Iron Steel Vanadium Titanium,2014,35(3):69.)
[4] 司天航, 韩秀丽, 刘磊,等. 镁铝对烧结矿矿相结构的影响规律[J]. 烧结球团, 2021,46(2):24.(SI Tian-hang,HAN Xiu-li,LIU Lei,et al. Influence of Mg and Al on mineralogical structure in sinter[J]. Sintering and Pelletizing,2021,46(2):24.)
[5] 杜亮,韩秀丽,张全胜,等.外矿型烧结矿矿相结构与冶金性能的定量关系[J].钢铁,2020,55(6):38.(DU Liang,HAN Xiu-li,ZHANG Quan-sheng,et al. Quantitative relationship between phase structure and metallurgical proper-ties of foreign type sinter[J].Iron and Steel, 2020,55(6):38.)
[6] 韩秀丽,司天航,刘盈盈,等. 不同含量Al₂O₃烧结矿矿相结构与RDI_+3.15 _mm的定量关系[J]. 中国冶金,2022,32(2):34.(HAN Xiu-li,SI Tian-hang,LIU Ying-ying,et al. Relationship between mineralogical structure and RDI_+3.15 _mm of sinter with different contents of Al₂O₃[J].China Metallurgy,2022,32(2):34.)
[7] 易正明,覃佳卓,姜志伟,等.MgO对高碱度高铝烧结矿的影响[J].钢铁,2021,56(2):50.(YI Zheng-ming,QIN Jia-zhuo,JIANG Zhi-wei,et al. Influence of MgO on high basicity high alumina sinter[J].Iron and Steel,2021,56(2):50.)
[8] 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):5.(ZHANG Jun,LI Chun-zeng,ZHU Li,et al. Effect of magnesia addition on sinter reducibility[J].Iron and Steel,2009,44(10):5.)
[9] 蒋大军,林千谷,何木光,等. MgO对烧结矿与高炉渣冶炼性能及工艺参数影响的试验[J]. 中国冶金,2010,20(1):35.(JIANG Da-jun,LIN Qian-gu,HE Mu-guang,et al. Industrial experimentation on influence of MgO on sinter and BF slag smelting properties and technical parameters[J].China Metallurgy,2010,20(1):35.)
[10] ZHOU M,YANG S T,JIANG T, et al. Influence of MgO in form of magnesite on properties and mineralogy of high chromium, vanadium, titanium magnetite sinters[J]. Ironmaking and Steelmaking: Products and Applications, 2015,42:217.
[11] LI G H, TANG Z K, ZHANG Y B, et al. Reduction swelling behaviour of haematite/magnetite agglomerates with addition of MgO and CaO[J]. Ironmaking and Steelmaking, 2010, 37(6):393.
[12] 金明芳,李光森,储满生,等. 烧结过程中MgO在赤铁矿中的扩散行为的研究[J]. 钢铁,2008,43(3):10.(JIN Ming-fang, LI Guang-sen, CHU Man-seng, et al. Diffusion between MgO and hematite during sintering[J]. Iron and Steel, 2008,43(3):10.)
[13] 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):6.(FAN Xiao-hui,LI Wen-qi,GAN Min,et al. Effect and mechanism of MgO on the strength of high basicity sinter[J].Journal of Central South University (Natural Science),2012,43(9):6.)
[14] 邓涛, 胡长庆. MgO在烧结矿中分布规律的研究[J]. 河南冶金, 2014, 22(2):8.(DENG Tao,HU Chang-qing. Study on the distrubtion of MgO in the sinter[J]. Henan Metallurgy, 2014, 22(2):8.)
[15] 郭玉峰, 郭兴敏. MgO对铁矿石烧结过程中二次赤铁矿形成的影响[J]. 钢铁研究学报, 2017, 29(3):6.(GUO Yu-feng F,GUO Xing-min. Effect of MgO on formation of secondary hematite in sintering process of iron ores[J].Journal of Iron and Steel Research,2017,29(3):6.)
[16] Shigaki I, Sawada M, Maekawa M, et al. Melting property of MgO containing sinter[J]. ISIJ International, 2010, 21(12):862.
[17] DONG J J,WANG G, GONG Y G, et al. Effect of high alumina iron ore of gibbsite type on sintering performance[J]. Ironmaking and Steelmaking, 2015, 42(1):34.
[18] Alejandro Cores, Alexander Babich, Moises Muniz, et al. The Influence of different iron ores mixtures composition on the quality of sinter[J]. ISIJ International,2010,50(8):1089.
[19] 武轶, 金俊, 熊德怀. 低碱度高镁烧结矿性能的研究[J]. 钢铁研究, 2013, 41(3):8.(WU Yi,JIN Jun,XIONG De-huai. Study on properties of low basicity and high w(MgO) sinter[J]. Research on Iron and Steel, 2013, 41(3):8.)
[20] 梅忠, 朱云杰. 烧结矿二元碱度对低温还原粉化性能的影响[J]. 河北冶金, 2019(4):5.(MEI Zhong,ZHU Yun-jie. Effects of binary alkalinity on RDI property[J]. Hebei Metallurgy, 2019(4):5.)
[21] 田硕. 巴西卡矿粉和杨迪矿粉的烧结基础特性及优化配矿研究[D]. 包头:内蒙古科技大学,2020.(TIAN Shuo. Study on the Basic Sintering Characteristics and Optimized Ore Blending of Brazilian Card Ore Powder and Yangdi Ore Powder[D]. Baotou:Inner Mongolia University of Science and Technology,2020.)
[22] 郝帅. PB矿粉和纽曼矿粉的烧结基础特性及优化配矿研究[D]. 包头:内蒙古科技大学,2020.(HAO Shuai.Study on the Basic Sintering Characteristics and Optimized Ore Blending of PB ore Powder and Newman Ore Powder[D]. Baotou:Inner Mongolia University of Science and Technology,2020.)
[23] 任强. 澳精矿粉和杨迪矿粉的烧结基础特性及优化配矿研究[D]. 包头:内蒙古科技大学,2020.(REN Qiang. Study on Sintering Basic Characteristics and Optimized Ore Blending of Ao Concentrate Powder and Yangdi Concent Rate Powder[D]. Baotou:Inner Mongolia University of Science and Technology,2020.)
[24] 车哲. 低镁资源做烧结熔剂的工艺及机理研究[D]. 武汉: 武汉科技大学,2021.(CHE Zhe. Research on Process and Mechanism of Low Magnesium Resources as Sintering Flux[D]. Wuhan:Wuhan University of Science and Technology,2021.)
[25] 王永菲, 王成国. 响应面法的理论与应用[J]. 中央民族大学学报 (自然科学版),2005,14(3):236.(WANG Yong-fei, WANG Cheng-guo.The application of response surface methodology[J].Journal of the CUN (Natural Science),2005,14(3):236.)
[26] 李晓斌, 陈小前, 张为华. 近似方法在多学科设计优化中的应用研究[J]. 弹箭与制导学报, 2004, 24 (1):212.(LI Xiao-bin, CHEN Xiao-qian,ZHANG Wei-hua.The applied study of approximation methods for multidisciplinary design optimization[J]. Journal of Prorectiles,Rockets,Missiles and Guidance,2004,24(1):212.)
[27] 郭玉峰, 郭兴敏. MgO对赤铁矿粉矿烧结产物低温还原过程的影响[J]. 钢铁研究学报, 2017, 29(9):7.(GUO Yu-feng,GUO Xing-min.Effect of MgO on low temperature reduction process of hematite fines sinter[J].Journal of Iron and Steel Research,2017,29(9):7.)
[28] ZHU D, CHOU J,SHI B, et al. Influence of MgO on low temperature reduction and mineralogical changes of sinter in simulated COREX shaft furnace reducing conditions[J]. Minerals, 2019, 9(5):272.
[29] 潘向阳,龙跃,李神子,等. MgO/Al₂O₃对烧结矿冶金性能的影响[J]. 钢铁钒钛,2019,40(4):100.(PAN Xiang-yang,LONG Yue,LI Shen-zi,et al. Effect of MgO/Al₂O₃ on metallurgical properties of sinter[J].Iron Steel Vanadium Titanium,2019,40(4):100.)
[30] YU Zheng-wei, LI Guang-hui, JIANG Tao,et al. Effect of basicity on titanomagnetite concentrate sintering[J]. ISIJ International, 2015, 55(4):907.
[31] 高强健, 魏国, 刘常升,等. 二元碱度对印尼钒钛矿烧结过程及烧结矿质量的影响[J]. 东北大学学报(自然科学版), 2016, 37(12):5.(GAO Qiang-jian,WEI Guo,LIU Chang-sheng,et al. Effect of binary basicity on sintering process and quality of indonesia vanadium titanium magnetite[J].Journal of Northeastern University(Natural Science),2016,37(12):5.)
[32] 巨建涛, 刘欢, 邢相栋.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):5.(JU Jian-tao,LIU Huan,XING Xiang-dong. Influence of mineral structure on metallurgical properties of high basicity sinter[J].Research on Iron and Steel,2017,45(3):5.)
[33] GUO H,GUO X M.Mechanism of low-temperature reduction degradation of alumina-containing hematite solid solution below 550 ℃[J].Metallurgical and Materials Transactions B,2018,49(6):3513.
[34] 王建芳,孙艳芹,赵文书,等. Al₂O₃/SiO₂对烧结矿铁酸钙生成能力的影响[J]. 烧结球团,2021,46(1):43.(WANG Jian-fang,SUN Yan-qin,ZHAO Wen-shu,et al. Influence of Al₂O₃/SiO₂ on formation ability of calcium ferrite in sinter[J].Sintering and Pelletizing,2021,46(1):43.)
[35] 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.(MENG Fan-jian,SUN Chang-yu,LI Ting-le,et al. Formation and influencing factors of silico-ferrite of calcium and aluminum in sinter[J].Iron and Steel,2018,53(7):16.)
[36] 杨涛,龙红明,丁成义,等.铝硅比对烧结成矿特性及冶金性能的影响[J].钢铁,2022,57(4):43.(YANG Tao,LONG Hong-ming,DING Cheng-yi,et al. Effect of w(Al₂O₃)/w(SiO₂) on sintered ore mineralization characteristics and metallurgical properties[J].Iron and Steel, 2022,57(4):43.)