机械活化和不锈钢渣掺量对矿渣胶凝材料性能的影响

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (2): 553-561.

机械活化和不锈钢渣掺量对矿渣胶凝材料性能的影响

张涛^1,2, 陈铁军^1,2, 陈永亮^1,2, 潘料庭³, 黄学忠³, 陈兴^1,2

1.武汉科技大学资源与环境工程学院,武汉 430081;
2.冶金矿产资源高效利用与造块湖北省重点实验室,武汉 430081;
3.广西北港新材料有限公司,北海 536000

收稿日期:2021-09-23 修回日期:2021-11-07 出版日期:2022-02-15 发布日期:2022-03-01
通讯作者: 陈铁军,博士,教授。E-mail:chentiejun@wust.edu.cn
作者简介:张涛(1998—),男,硕士研究生。主要从事固废资源化利用研究。E-mail:zt178344348@163.com
基金资助:
湖北省教育厅科学研究计划资助项目(Q20191110);中冶长天基础研究基金项目(2020JCYJ06)

Effects of Mechanical Activation and Stainless Steel Slag Content on Properties of Slag Cementitious Materials

ZHANG Tao^1,2, CHEN Tiejun^1,2, CHEN Yongliang^1,2, PAN Liaoting³, HUANG Xuezhong³, CHEN Xing^1,2

1. School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China;
2. Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan 430081, China;
3. Guangxi Beigang New Material Co., Ltd., Beihai 536000, China

Received:2021-09-23 Revised:2021-11-07 Online:2022-02-15 Published:2022-03-01

摘要/Abstract

摘要： 为了促进不锈钢厂废渣的资源化利用,以红土镍矿酸性高炉渣和不锈钢渣为主要原料制备胶凝材料,研究机械活化和不锈钢渣质量掺量对矿渣胶凝材料性能的影响,并利用XRD、SEM对胶凝材料的水化产物及微观结构进行分析。结果表明,机械活化主要通过改变原料的比表面积和颗粒级配来影响胶凝材料性能,且矿渣中细颗粒占比是影响其胶凝活性的关键因素,适宜的球磨时间为45 min,此时矿渣比表面积达到524.66 m²/kg。不锈钢渣与酸性矿渣之间存在协同作用,当不锈钢渣质量掺量为20%时,胶砂试块3 d、7 d、28 d抗压强度分别为17.8 MPa、24.3 MPa 和34.8 MPa,抗折强度分别为4.5 MPa、6.2 MPa和6.8 MPa,达到P·S 32.5R矿渣硅酸盐水泥强度标准。不锈钢渣的掺入在水化早期和后期都促进钙矾石及C-S-H凝胶的生成,对胶砂试块各龄期强度都有促进作用,而未水化的钢渣细颗粒也起着微集料填充作用,有利于胶凝材料早期强度的提高。

关键词: 酸性矿渣, 不锈钢渣, 机械活化, 胶凝材料, 协同作用, 颗粒级配, 微观结构

Abstract: In order to promote the resource utilization of waste slag from stainless steel factory, the cementification materials were prepared with laterite nickel mine acid furnace slag and stainless steel slag as the main raw materials. The effects of mechanical activation and the mass addition amount of stainless steel slag on the properties of cementing materials were studied. The hydration products and microstructure of cementing materials were analyzed by XRD and SEM. The results show that mechanical activation is mainly through the changes of specific surface area and particle size distribution of raw materials to affect the properties of cementing materials, and the proportion of fine particles in blast furnace slag is the crucial factor affecting the cementing activity, the optimal ball milling time is 45 min, and the specific surface area of blast furnace slag is 524.66 m²/kg. There is a synergistic action between stainless steel slag and acidic slag. When the mass content of stainless steel slag is 20%, with curing ages of 3 d,7 d and 28 d, the compressive strength of mortar test block is 17.8 MPa, 24.3 MPa and 34.8 MPa, and the flexural strength is 4.5 MPa, 6.2 MPa and 6.8 MPa, respectively, which reaches the requirement of P·S 32.5R slag Portland cement strength standard. The addition of stainless steel slag facilitates the formation of ettringite and C-S-H gel at the early and late hydration stages, which increases the strength of mortar test block at various ages. The fine particles of steel slag without hydration also play a micro-aggregate filling role, which is conducive to the improvement of the early strength of cementing materials.

Key words: acidic slag, stainless steel slag, mechanical activation, cementitious material, synergy, grain size distribution, microstructure

中图分类号:

X751

张涛, 陈铁军, 陈永亮, 潘料庭, 黄学忠, 陈兴. 机械活化和不锈钢渣掺量对矿渣胶凝材料性能的影响[J]. 硅酸盐通报, 2022, 41(2): 553-561.

ZHANG Tao, CHEN Tiejun, CHEN Yongliang, PAN Liaoting, HUANG Xuezhong, CHEN Xing. Effects of Mechanical Activation and Stainless Steel Slag Content on Properties of Slag Cementitious Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(2): 553-561.

参考文献

[1] 何惠平,张晓刚.钢铁工业固废利用现状、存在问题与应对措施[N].中国冶金报,2019-10-24(001).
HE H P, ZHANG X G. Utilization status, existing problems and countermeasures of solid waste in iron and steel industry[N].China Metallurgical Journal, 2019-10-24(001) (in Chinese).
[2] 李喜才.矿渣微粉活性低的原因及解决办法[J].中国水泥,2016(3):76-77.
LI X C. Reasons and solutions of low activity of slag powder[J]. China Cement, 2016(3): 76-77 (in Chinese).
[3] 李茂辉,陈志杰.某低活性酸性矿渣微粉的机械力化学效应研究[J].金属矿山,2019(3):200-203.
LI M H, CHEN Z J. Study on mechano-chemistry effect of a low activity acid slag powder[J]. Metal Mine, 2019(3): 200-203 (in Chinese).
[4] 陆敬寒.矿渣细度与掺量对水泥性能的影响[J].江苏建材,2009(3):9-11.
LU J H. Influence of slag finess and mixing amount on the cement property[J]. Jiangsu Building Materials, 2009(3): 9-11 (in Chinese).
[5] 徐彬,蒲心诚.矿渣玻璃体微观分相结构研究[J].重庆建筑大学学报,1997(4):53-60.
XU B, PU X C. Study on the microstructure of slag glass[J]. Journal of Chongqing Jianzhu University, 1997(4): 53-60 (in Chinese).
[6] 宋月,林娜,马彦伟,等.复合激发剂对钢渣-矿渣基胶凝材料性能的影响[J].安徽工业大学学报(自然科学版),2019,36(1):24-28.
SONG Y, LIN N, MA Y W, et al. Influence of composite activator on the properties of steel slag and slag based cementing materials[J]. Journal of Anhui University of Technology (Natural Science), 2019, 36(1): 24-28 (in Chinese).
[7] 操龙虎.不锈钢渣的污染性分析及其处理方法[J].炼钢,2019,35(2):75-78.
CAO L H. Pollution analysis and treatment methods of stainless steel slag[J]. Steelmaking, 2019, 35(2): 75-78 (in Chinese).
[8] 戴剑,陈平,赵艳荣,等.不锈钢AOD渣胶凝性能的研究[J].混凝土,2019(3):94-96.
DAI J, CHEN P, ZHAO Y R, et al. Study on the coagulation properties of stainless steel AOD slag[J]. Concrete, 2019(3): 94-96 (in Chinese).
[9] 李颖,吴保华,倪文,等.矿渣-钢渣-石膏体系早期水化反应中的协同作用[J].东北大学学报(自然科学版),2020,41(4):581-586.
LI Y, WU B H, NI W, et al. Synergies in early hydration reaction of slag-steel slag-gypsum system[J]. Journal of Northeastern University (Natural Science), 2020, 41(4): 581-586 (in Chinese).
[10] DUAN S Y, LIAO H Q, CHENG F Q, et al. Investigation into the synergistic effects in hydrated gelling systems containing fly ash, desulfurization gypsum and steel slag[J]. Construction and Building Materials, 2018, 187: 1113-1120.
[11] MASON B. The constitution of some open-heart slag[J]. Journal of Iron and Steel Institute, 1994(11): 69-80.
[12] 万惠文,陈学兵,王君.矿渣成分及结构对潜在活性的影响[J].武汉理工大学学报,2009,31(4):101-103.
WAN H W, CHEN X B, WANG J. Influence of the composition and structure of slag on its activity[J]. Journal of Wuhan University of Technology, 2009, 31(4): 101-103 (in Chinese).
[13] 高树军,吴其胜,张少明.机械力化学方法活化矿渣研究[J].南京工业大学学报(自然科学版),2002,24(6):61-65.
GAO S J, WU Q S, ZHANG S M. Study on mechano-chemical activity of the slag treated by high-energy ball milling[J]. Journal of Nanjing University, 2002, 24(6): 61-65 (in Chinese).
[14] 张之璐.复合激发剂对碱矿渣胶结材水化进程与收缩性能影响研究[D].重庆:重庆大学,2019:10-12.
ZHANG Z L. Study on effects of activator mix proportions on hydration process and shrinkage behavior of alkali-activated slag binder[D]. Chongqing: Chongqing University, 2019: 10-12 (in Chinese).
[15] NEDELJKOVI M, MLADENA L, VAN B K, et al. Development and application of an environmentally friendly ductile alkali-activated composite[J]. Journal of Cleaner Production, 2018, 80, 524.
[16] 邹敏,沈玉,刘娟红.钢渣粉在水泥基材料中应用研究综述[J].硅酸盐通报,2021,40(9):2964-2977.
ZOU M, SHEN Y, LIU J H. Review on application of steel slag powder in cement-based materials[J]. Bulletin of the Chinese Ceramic Society, 2021, 40(9): 2964-2977 (in Chinese).
[17] 彭小芹,刘朝,李三,等.碱激发钢渣矿渣胶凝材料凝结硬化性能研究[J].湖南大学学报(自然科学版),2015,42(6):47-52.
PENG X Q, LIU C, LI S, et al. Research on the setting and hardening performance of alkali-activated steel slag-slag based cementitious materials[J]. Journal of Hunan University (Natural Sciences), 2015, 42(6): 47-52 (in Chinese).
[18] 吕岩,那贤昭,齐渊洪,等.不锈钢EAF渣无害化处置及作为水泥基材料的工程性能[J].钢铁,2014,49(4):90-96.
LU Y, NA X Z, QI Y H, et al. Harmless treatment of stainless steel EAF slag and its engineering performance for using as cement-base materials[J]. Iron & Steel, 2014, 49(4): 90-96 (in Chinese).
[19] 仪桂兰,史永林.钢渣和高炉渣微粉技术研究[J].中国资源综合利用,2017,35(2):90-94.
YI G L, SHI Y L. Research on ultra-fine powder of steel slag and blast furnace slag[J]. China Resources Comprehensive Utilization, 2017, 35(2): 90-94 (in Chinese).
[20] 周建伟,程宝军,余保英,等.脱硫石膏的热处理对超硫酸盐水泥性能的影响[J].无机盐工业,2020,52(11):79-85.
ZHOU J W, CHENG B J, YU B Y, et al. Effect of heat-treated desulfurized gypsum on properties of super sulfated cement[J]. Inorganic Chemicals Industry, 2020, 52(11): 79-85 (in Chinese).
[21] CUI X, NI W. Hydration behavior of cementitious materials with all solid waste based of steel slag and blast furnace slag[J]. Revista De La Facultad De Ingeniería, 2016, 31(7): 172-181.
[22] CUI X W, NI W, REN C. Early hydration kinetics of cementitious materials containing different steel slag powder contents[J]. International Journal of Heat and Technology, 2016, 34(4): 590-596.