Crystallization of calcium silicate at elevated temperatures in highly alkaline system of Na2O-CaO-SiO2-H2O

doi:10.1016/j.cjche.2017.02.012

›› 2017, Vol. 25 ›› Issue (10): 1539-1544.DOI: 10.1016/j.cjche.2017.02.012

• Materials and Product Engineering • Previous Articles Next Articles

Crystallization of calcium silicate at elevated temperatures in highly alkaline system of Na₂O-CaO-SiO₂-H₂O

Ganyu Zhu¹, Huiquan Li^1,2, Shaopeng Li¹, Xinjuan Hou^1,2, Xingrui Wang¹

1 Key Laboratory of Green Process and Engineering, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2016-10-27 Revised:2017-02-14 Online:2017-03-21 Published:2017-10-28
Supported by:
Supported by the National Natural Science Foundation of China (51304184) and the Coal Based Key Scientific and Technological Project of Shanxi Province (MC2014-06).

Crystallization of calcium silicate at elevated temperatures in highly alkaline system of Na₂O-CaO-SiO₂-H₂O

Ganyu Zhu¹, Huiquan Li^1,2, Shaopeng Li¹, Xinjuan Hou^1,2, Xingrui Wang¹

1 Key Laboratory of Green Process and Engineering, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

通讯作者: Huiquan,E-mail address:hqli@ipe.ac.cn
基金资助:
Supported by the National Natural Science Foundation of China (51304184) and the Coal Based Key Scientific and Technological Project of Shanxi Province (MC2014-06).

Abstract

Abstract: In Na₂O-CaO-SiO₂-H₂O system, systematic investigations of phase and morphology of calcium silicate in hydrothermal conditions were concisely conducted for high-value utilization of silicon resource in high-alumina fly ash (HAFA). The results show that crystal composition and phase may be affected by relatively low concentration of NaOH, and sodium ions are rearranged into the structure to form NaCaHSiO₄ and Na₂Ca₃H₈Si₂O₁₂ with different C/S ratio at high concentration of NaOH. In addition, phases in wollastonite group possess the morphology of nanofiber. Formation of nanofiber is attributed to the difference of surface energies between axial and radial direction, and higher temperatures lead to easier growth along radial direction. The preparation of C-S-H with different phases and morphologies can guide for the application of silicate solution with high alkalinity with different purposes.

Key words: Crystallization, Hydrothermal, Calcium silicate, Nanofiber

摘要： In Na₂O-CaO-SiO₂-H₂O system, systematic investigations of phase and morphology of calcium silicate in hydrothermal conditions were concisely conducted for high-value utilization of silicon resource in high-alumina fly ash (HAFA). The results show that crystal composition and phase may be affected by relatively low concentration of NaOH, and sodium ions are rearranged into the structure to form NaCaHSiO₄ and Na₂Ca₃H₈Si₂O₁₂ with different C/S ratio at high concentration of NaOH. In addition, phases in wollastonite group possess the morphology of nanofiber. Formation of nanofiber is attributed to the difference of surface energies between axial and radial direction, and higher temperatures lead to easier growth along radial direction. The preparation of C-S-H with different phases and morphologies can guide for the application of silicate solution with high alkalinity with different purposes.

关键词: Crystallization, Hydrothermal, Calcium silicate, Nanofiber

Ganyu Zhu, Huiquan Li, Shaopeng Li, Xinjuan Hou, Xingrui Wang. Crystallization of calcium silicate at elevated temperatures in highly alkaline system of Na₂O-CaO-SiO₂-H₂O[J]. , 2017, 25(10): 1539-1544.

References

[1] S. Dai, L. Zhao, S. Peng, C.L. Chou, X. Wang, Y. Zhang, D. Li, Y. Sun, Abundances and distribution of minerals and elements in high-alumina coal fly ash from the Jungar Power Plant, Inner Mongolia, China, Int. J. Coal Geol. 81(2010) 320-332.
[2] J.M. Sun, P. Chen, Resourcing utilization of high alumina fly ash, Adv. Mater. Res. 652-654(2013) 2570-2575.
[3] H.Q. Li, J.B. Hui, C.Y. Wang, W.J. Bao, Z.H. Sun, Extraction of alumina from coal fly ash by mixed-alkaline hydrothermal method, Hydrometallurgy 147-148(2014) 183-187.
[4] G.H. Bai, T. Teng, A.G. Wang, J.G. Qin, P. Xu, P.C. Li, Alkali desilicated coal fly ash as substitute of bauxite in lime-soda sintering process for aluminum production, Trans. Nonferrous Met. Soc. 20(2010) 169-175.
[5] X.B. Xu, Y.B. Zhu, S. Zhang, Z.K. Liang, X.X. Chen, Y.B. Gong, Research on optimizing process of pre-desilication of high-aluminum fly ash, Light Met. 7(2013) 18-21.
[6] Z.H. Sun, W.J. Bao, H.Q. Li, J.B. Hui, C.Y. Wang, Q. Tang, Mineral phase change of highalumina fly ash during desilication and extraction of Al₂O₃ by alkali dissolution process, Chin. J. Process. Eng. 13(2013) 403-407.
[7] C. Feng, Y. Yao, Y. Li, X.M. Liu, H.H. Sun, Thermal activation on calcium silicate slag from high-alumina fly ash:A technical report, Clean Technol. Environ. Policy 16(2014) 667-672.
[8] J.J. Chen, J.J. Thomas, H.F.W. Taylor, H.M. Jennings, Solubility and structure of calcium silicate hydrates, Cem. Concr. Res. 34(2004) 1499-1519.
[9] D.R. Moorehead, E.R. Mccartney, Hydrothermal formation of calcium silicate hydrates, J. Am. Ceram. Soc. 48(1965) 565-569.
[10] S. Garrault-Gauffinet, A. Nonat, Experimental investigation of calcium silicate hydrate (C-S-H) nucleation, J. Cryst. Growth 200(1999) 565-574.
[11] N. Meller, C. Hall, J.S. Phipps, A new phase diagram for the CaO-Al₂O₃-SiO₂-H₂O hydro ceramic system at 200 degrees C, Mater. Res. Bull. 40(2005) 715-723.
[12] E.B. Nelson, G.L. Kalousek, Effect of Na₂O on calcium silicate hydrates at elevated temperature, Cem. Concr. Res. 7(1977) 687-694.
[13] Y.Z. Xi, L.S.D. Glasser, Hydrothermal study in the system Na₂O-CaO-SiO₂-H₂O at 300℃, Cem. Concr. Res. 14(1984) 741-748.
[14] K. Baltakys, R. Siauciunas, The influence of γ-Al₂O₃ and Na₂O on the formation of gyrolite in the stirring suspension, J. Mater. Sci. 41(2006) 4799-4805.
[15] E.A. Blakeman, J.A. Gard, C.G. Ramsay, H.F.W. Taylor, Studies on the system sodium oxide-calcium oxide-silica-water, J. Chem. Technol. Biotechnol. 24(1974) 239-245.
[16] W. Nocuń-Wczelik, Effect of Na and Al on the phase composition and morphology of autoclaved calcium silicate hydrates, Cem. Concr. Res. 29(1999) 1759-1767.
[17] I.G. Richardson, The calcium silicate hydrates, Cem. Concr. Res. 38(2008) 137-158.
[18] X.L. Hu, K. Yanagisawa, A. Onda, K. Kajiyoshi, Stability and phase relations of dicalcium silicate hydrates under hydrothermal conditions, J. Ceram. Soc. Jpn. 224(2006) 174-179.
[19] L. Black, K. Garbev, P. Stemmermann, K.R. Hallam, G.C. Allen, Characterisation of crystalline C-S-H phases by X-ray photoelectron spectroscopy, Cem. Concr. Res. 33(2003) 899-911.
[20] J.A. Gard, H.F.W. Taylor, The crystal structure of foshagite, Acta Crystallogr. 13(1960) 785-793.
[21] R.A. Rashid, R. Shamsudin, M.A.A. Habid, A. Jalar, In-vitro bioactivity of wollastonite materials derived from limestone and silica sand, Ceram. Int. 40(2014) 6847-6853.
[22] W. Li, Z.L. Jin, Z.H. Zhang, Application and synthesis of inorganic whisker materials, Prog. Chem. 15(2003) 264-274.
[23] M.Q. Li, Y.F. Chen, S.Q. Xia, J.H. Li, H.X. Liang, Microstructure and processing of ultralight calcium silicate insulation material, J. Chin. Ceram. Soc. 28(2000) 401-406.
[24] G.O. Assarsson, Hydrothermal reactions between calcium hydroxide and amorphous silica:The reactions between 180° and 220°, J. Phys. Chem. 61(1957) 473-479.
[25] S.Y. Hong, F.P. Glasser, Phase relations in the CaO-SiO₂-H₂O system to 200℃ at saturated steam pressure, Cem. Concr. Res. 34(2004) 1529-1534.
[26] F. Lu, B. Zhao, R. Li, W.D. Ruan, Crystal growth of barium nitrate on thiol-terminated self-assembled monolayers and a Raman spectroscopic investigation of the crystal facets, J. Cryst. Growth 426(2015) 33-37.
[27] R. Li, J.S. Gandhi, R. Pillai, R. Forrest, D. Starikov, A. Bensaoula, Epitaxial growth of (111)-oriented Zr_xTi_1-xN thin films on c-plane Al₂O₃ substrates, J. Cryst. Growth 404(2014) 1-8.
[28] H.F. Xu, P.R. Buseck, TEM investigation of the domain structure and superstructure in hillebrandite, Ca₂SiO₃(OH)₂, Am. Mineral. 81(1996) 1371-1374.

Crystallization of calcium silicate at elevated temperatures in highly alkaline system of Na₂O-CaO-SiO₂-H₂O

Crystallization of calcium silicate at elevated temperatures in highly alkaline system of Na₂O-CaO-SiO₂-H₂O

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