FeS与TiO2共存对水泥熟料中Ti的固化与迁移及矿物组成的影响

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (5): 1453-1461.

所属专题：水泥混凝土

FeS与TiO₂共存对水泥熟料中Ti的固化与迁移及矿物组成的影响

冯庆革¹, 梁思亮¹, 杨义², 柏秀奎¹, 王东波¹, 赵政术², 黄丽霖²

1.广西大学资源环境与材料学院,南宁 530004;
2.广西鱼峰集团有限公司,柳州 545000

收稿日期:2020-11-27 修回日期:2021-01-14 出版日期:2021-05-15 发布日期:2021-06-07
作者简介:冯庆革(1967—),男,博士,教授。主要从事环境污染控制(偏重于固体废弃物处理和处置)、环境材料、高性能水泥混凝土的研究及高活性混合材料的开发。E-mail:fengqg@gxu.edu.cn
基金资助:
国家自然科学基金(51762004);广西科技创新驱动发展重大专项(桂科AA17204066,AA18242007);柳州市重点研发计划(2018BB20501)

Effect of Co-Existence of FeS and TiO₂ on Solidification and Migration of Ti and Mineral Composition in Cement Clinker

FENG Qingge¹, LIANG Siliang¹, YANG Yi², BAI Xiukui¹, WANG Dongbo¹, ZHAO Zhengshu², HUANG Lilin²

1. College of Resources, Environment and Materials, Guangxi University, Nanning 530004, China;
2. Guangxi Yufeng Group, Liuzhou 545000, China

Received:2020-11-27 Revised:2021-01-14 Online:2021-05-15 Published:2021-06-07

摘要/Abstract

摘要： 为研究FeS与TiO₂共存对水泥熟料中Ti的固化与迁移及矿物组成的影响,采用电感耦合等离子体发射光谱(ICP-OES)、能量色散光谱(EDS)、X射线衍射(XRD)与Rietveld全谱拟合法分别测量水泥熟料中Ti 的含量与分布以及熟料的矿物组成,根据X射线光电子能谱(XPS)、结构性差异因子D与Hume-Rothery经验公式探究S与Ti在水泥熟料中的存在形式。结果表明,FeS的掺入对水泥熟料固化Ti的能力影响较小,但使得Ti由中间相向硅酸盐相迁移。随着FeS含量增加,Ti在C₂S中的含量增加46.9%,促进α-C₂S的形成,增强了硅酸盐相对Ti的固化能力;熟料中Fe²⁺/Fe³⁺摩尔比增大和CaSO₄的生成是使C₃S和C₄AF含量降低,C₂S和C₃A含量增加的主要原因。

关键词: 水泥熟料, 硫化亚铁, 钛, 固化, 迁移, 矿物组成

Abstract: To investigate the effect of co-existence of FeS and TiO₂ on the solidification and migration of Ti and mineral composition in cement clinker, the content and distribution of Ti in cement clinker and the mineral composition of clinker were measured by inductively coupled plasma emission spectrum (ICP-OES), energy dispersive spectrum (EDS), X-ray diffraction (XRD) and Rietveld full spectrum fitting. The existence forms of S and Ti in cement clinker were investigated by X-ray photoelectron spectroscopy (XPS), structural difference factor D and Hume-Rothery empirical formula. The results show that the incorporation of FeS has little influence on the curing capacity of cement clinker to solidify Ti, but it makes Ti migrate from intermediate phase to silicate phase. With the increase of FeS content, the content of Ti in C₂S increases by 46.9%. The incorporation of FeS promotes the formation of α-C₂S, thus enhancing the curing ability of silicate phase to solidify Ti. Meanwhile, with the increase of FeS content, the increase of Fe²⁺/Fe³⁺ mole ratio and the generation of CaSO₄ in clinker are the main reasons for the decrease of C₃S and C₄AF content and the increase of C₂S and C₃A content.

Key words: cement clinker, FeS, Ti, solidification, migration, mineral composition

中图分类号:

TQ172

冯庆革, 梁思亮, 杨义, 柏秀奎, 王东波, 赵政术, 黄丽霖. FeS与TiO₂共存对水泥熟料中Ti的固化与迁移及矿物组成的影响[J]. 硅酸盐通报, 2021, 40(5): 1453-1461.

FENG Qingge, LIANG Siliang, YANG Yi, BAI Xiukui, WANG Dongbo, ZHAO Zhengshu, HUANG Lilin. Effect of Co-Existence of FeS and TiO₂ on Solidification and Migration of Ti and Mineral Composition in Cement Clinker[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(5): 1453-1461.

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FeS与TiO₂共存对水泥熟料中Ti的固化与迁移及矿物组成的影响

Effect of Co-Existence of FeS and TiO₂ on Solidification and Migration of Ti and Mineral Composition in Cement Clinker

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