高硅型铁尾矿机械活化效果及机理研究

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (8): 2810-2818.

高硅型铁尾矿机械活化效果及机理研究

梁志鹏¹, 孙畅^1,2, 毕万利^3,4, 赵明泽², 关岩^3,4

1.辽宁科技大学土木工程学院,鞍山 114051;
2.沈阳建筑大学土木工程学院,沈阳 110168;
3.辽宁科技大学材料与冶金学院,鞍山 114051;
4.辽宁科技大学科大峰驰镁建材研究院,鞍山 114051

收稿日期:2022-02-26 修回日期:2022-05-24 出版日期:2022-08-15 发布日期:2022-08-30
通讯作者: 孙畅,博士研究生,助教。E-mail:970687727@qq.com
作者简介:梁志鹏(1997—),男,硕士研究生。主要从事新型建筑材料的研究。E-mail:1334820243@qq.com
基金资助:
辽宁省重大科技专项(2020JH1/10300005)

Mechanical Activation of High Silicon Iron Tailings and Its Mechanism

LIANG Zhipeng¹, SUN Chang^1,2, BI Wanli^3,4, ZHAO Mingze², GUAN Yan^3,4

1. School of Civil Engineering, University of Science and Technology Liaoning, Anshan 114051, China;
2. School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China;
3. School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China;
4. Research Institution of Keda Fengchi Magnesium Building Materials, University of Science and Technology Liaoning, Anshan 114051, China

Received:2022-02-26 Revised:2022-05-24 Online:2022-08-15 Published:2022-08-30

摘要/Abstract

摘要： 为促进铁尾矿工程应用,以辽宁本溪高硅型铁尾矿为例,研究机械活化方式和活化时间对铁尾矿形貌及活性的影响。通过粒度分析、胶砂试验和石灰吸附测试等,探究机械活化对铁尾矿粒径分布、比表面积、活性指数和火山灰活性的影响;通过X射线衍射和扫描电镜分析,探究胶凝体系的水化反应机理。结果表明:机械活化可以优化铁尾矿粒径,提高颗粒圆度,降低颗粒表面结晶度,且粉磨40~60 min效果最佳;湿磨活化50 min时,活性指数达96.6%,火山灰活性大幅提升,湿磨活化效果显著优于干磨;机械活化促进了铁尾矿与水泥的二次水化反应,提升了胶凝体系性能。

关键词: 铁尾矿, 胶凝体系, 机械活化, 结晶度, 活性指数, 水化反应

Abstract: In order to promote engineering application of iron tailings, taking Benxi high silicon iron tailings in Liaoning Province as an example, the effects of different mechanical activation methods and time on the activity and morphology of iron tailings were studied. The effect of mechanical activation on the particle size distribution, specific surface area, activity index and pozzolanic activity of iron tailings were detected by grading analysis, mortar test, lime adsorption test and so on. The hydration reaction mechanism of cementitious system was explored by X-ray diffraction and scanning electron microscopy analysis. The results show that mechanical activation can refine the partical size of iron tailings, increase the particle roundness and reduce surface crystallinity. Grinding for 40~60 min has the best effect. The activity index is up to 96.6% after wet grinding for 50 min, and the pozzolanic activity is significantly enhanced. The activation effect of wet grinding is better than that of dry grinding. Mechanical activation promotes the secondary hydration reaction between iron tailings and cement, and improves the performance of cementitious system.

Key words: iron tailing, cementitious system, mechanical activation, crystallinity, activity index, hydration reaction

中图分类号:

TD926

梁志鹏, 孙畅, 毕万利, 赵明泽, 关岩. 高硅型铁尾矿机械活化效果及机理研究[J]. 硅酸盐通报, 2022, 41(8): 2810-2818.

LIANG Zhipeng, SUN Chang, BI Wanli, ZHAO Mingze, GUAN Yan. Mechanical Activation of High Silicon Iron Tailings and Its Mechanism[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(8): 2810-2818.

参考文献

[1] ZHAO J S, NI K, SU Y P, et al. An evaluation of iron ore tailings characteristics and iron ore tailings concrete properties[J]. Construction and Building Materials, 2021, 286: 122968.
[2] BANGALORE CHINNAPPA G, KARRA R C. Experimental and statistical evaluations of strength properties of concrete with iron ore tailings as fine aggregate[J]. Journal of Hazardous, Toxic, and Radioactive Waste, 2020, 24(1): 04019038.
[3] YAO G, WANG Q, SU Y W, et al. Mechanical activation as an innovative approach for the preparation of pozzolan from iron ore tailings[J]. Minerals Engineering, 2020, 145: 106068.
[4] 宋少民,陈泓燕.铁尾矿微粉对低熟料胶凝材料混凝土性能的影响研究[J].硅酸盐通报,2020,39(8):2557-2566.
SONG S M, CHEN H Y. Influence of iron tailings powder on performance of low clinker cementitious material concrete[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(8): 2557-2566 (in Chinese).
[5] LIU Y, HAO W R, HE W, et al. Influence of dolomite rock powder and iron tailings powder on the electrical resistivity, strength and microstructure of cement pastes and concrete[J]. Coatings, 2022, 12(1): 95.
[6] 路畅,陈洪运,傅梁杰,等.铁尾矿制备新型建筑材料的国内外进展[J].材料导报,2021,35(5):5011-5026.
LU C, CHEN H Y, FU L J, et al. Research progress on the preparation of new building materials using iron tailings[J]. Materials Reports, 2021, 35(5): 5011-5026 (in Chinese).
[7] 朴春爱,王栋民,张力冉,等.化学-机械耦合效应对铁尾矿粉胶凝活性的影响[J].应用基础与工程科学学报,2016,24(6):1100-1109.
PIAO C N, WANG D M, ZHANG L R, et al. Influence of chemical mechanical coupling effect on iron ore tailings cementitious activity[J]. Journal of Basic Science and Engineering, 2016, 24(6): 1100-1109 (in Chinese).
[8] CHENG Y H, HUANG F, LI W C, et al. Test research on the effects of mechanochemically activated iron tailings on the compressive strength of concrete[J]. Construction and Building Materials, 2016, 118: 164-170.
[9] 朴春爱,王栋民,张力冉,等.机械力活化对铁尾矿活化性能的影响研究[J].硅酸盐通报,2016,35(9):2973-2979.
PIAO C A, WANG D M, ZHANG L R, et al. Effect of mechanical force on the activation of iron ore tailings[J]. Bulletin of the Chinese Ceramic Society, 2016, 35(9): 2973-2979 (in Chinese).
[10] YAO G, CUI T, ZHANG J K, et al. Effects of mechanical grinding on pozzolanic activity and hydration properties of quartz[J]. Advanced Powder Technology, 2020, 31(11): 4500-4509.
[11] YANG M J, SUN J H, DUN C Y, et al. Cementitious activity optimization studies of iron tailings powder as a concrete admixture[J]. Construction and Building Materials, 2020, 265: 120760.
[12] 顾晓薇,艾莹莹,赵昀奇,等.铁尾矿资源化利用现状[J/OL].中国有色金属学报:1-29.http://kns.cnki.net/kcms/detail/43.1238.TG.20220112.1844.002.html.
GU X W, AI Y Y, ZHAO Y Q, et al. Status quo of resource utilization of iron tailings[J/OL]. Transactions of Nonferrous Metals Society of China: 1-29. http://kns.cnki.net/kcms/detail/43.1238.TG.20220112.1844.002.html (in Chinese).
[13] 张思宇,黄少文.火山灰活性评价方法及其影响因素[J].材料导报,2011,25(15):104-106+113.
ZHANG S Y, HUANG S W. Evaluation methods and influence factors of pozzolanic activity[J]. Materials Review, 2011, 25(15): 104-106+113 (in Chinese).
[14] 杨迎春,毛宇光.不同细度铁尾矿粉对水泥基材料性能的影响[J].西安建筑科技大学学报(自然科学版),2020,52(2):241-247.
YANG Y C, MAO Y G. Influence of iron tailing powder of different fineness on properties of cement-based material[J]. Journal of Xi'an University of Architecture & Technology (Natural Science Edition), 2020, 52(2): 241-247 (in Chinese).
[15] HAN F H, LI L, SONG S M, et al. Early-age hydration characteristics of composite binder containing iron tailing powder[J]. Powder Technology, 2017, 315: 322-331.
[16] 谢群,李海波,王火明.矿物掺合料对水泥砂浆性能的影响[J].中外公路,2021,41(3):291-294.
XIE Q, LI H B, WANG H M. Effect of mineral admixtures on properties of cement mortar[J]. Journal of China & Foreign Highway, 2021, 41(3): 291-294 (in Chinese).
[17] 马登辉,姚华彦,王新志,等.珊瑚砂颗粒形状特征分析[J].工程地质学报,2021,29(5):1452-1459.
MA D H, YAO H Y, WANG X Z, et al. Particle shape characteristics of coral sands[J]. Journal of Engineering Geology, 2021, 29(5): 1452-1459 (in Chinese).
[18] YI Z L, SUN H H, WEI X Q, et al. Iron ore tailings used for the preparation of cementitious material by compound thermal activation[J]. International Journal of Minerals, Metallurgy and Materials, 2009, 16(3): 355-358.
[19] MENDES B C, PEDROTI L G, FONTES M P F, et al. Technical and environmental assessment of the incorporation of iron ore tailings in construction clay bricks[J]. Construction and Building Materials, 2019, 227: 116669.
[20] LI R F, ZHOU Y, LI C W, et al. Recycling of industrial waste iron tailings in porous bricks with low thermal conductivity[J]. Construction and Building Materials, 2019, 213: 43-50.
[21] 姚耿.机械活化硅质尾矿水化反应特性研究[D].青岛:山东科技大学,2020.
YAO G. Hydration properties of mechanically activated siliceous tailings[D]. Qingdao: Shandong University of Science and Technology, 2020 (in Chinese).
[22] JENNINGS H M. Refinements to colloid model of C-S-H in cement: cm-II[J]. Cement and Concrete Research, 2008, 38(3): 275-289.
[23] 毛奎,蔡亮,吴小文,等.几种典型铁尾矿制备加气混凝土性能及水化机理研究[J].硅酸盐通报,2019,38(12):3719-3725.
MAO K, CAI L, WU X W, et al. Hydration mechanism and properties of aerated concrete prepared by several typical iron tailings[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(12): 3719-3725 (in Chinese).
[24] 张苹,李秋义,赵铁军,等.超细矿渣粉对水泥水化的影响[J].东北大学学报(自然科学版),2010,31(9):1300-1303.
ZHANG P, LI Q Y, ZHAO T J, et al. Influence of superfine slag powder on the hydration of cement[J]. Journal of Northeastern University (Natural Science), 2010, 31(9): 1300-1303 (in Chinese).