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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2021, Vol. 40 ›› Issue (5): 1453-1461.

Special Issue: 水泥混凝土

• Cement and Concrete • Previous Articles     Next Articles

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. 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

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

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