2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 10: Battery, Recycling, Environmental, Mining

Editors:Kongoli F, Kumar V, Aifantis K, Pagnanelli F
Publisher:Flogen Star OUTREACH
Publication Year:2016
Pages:220 pages
ISBN:978-1-987820-54-6
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
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    Dissolution Thermodynamics Analysis of CaSiO3 in the System of CaSiO3-NH3-NH4Cl-H2O

    ZhiBo Tong1; Guo Jun Ma2; Feng Li3; Xiang Zhang4; ZhengLiang Xue4;
    1KEY LABORATORY FOR FERROUS METALLURGY AND RESOURCES UTILIZATION OF MINISTRY OF EDUCATION,WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, P.R. CHINA, 430081, WuHan, China; 2KEY LABORATORY FOR FERROUS METALLURGY AND RESOURCES UTILIZATION OF MINISTRY OF EDUCATION, WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY,WUHAN 430081, CHINATHE STATE KEY LABORATORY OF REFRACTORIES AND MET, wuhan, China; 3KEY LABORATORY FOR FERROUS METALLURGY AND RESOURCES UTILIZATION OF MINISTRY OF EDUCATION, WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, Wuhan, China; 4THE STATE KEY LABORATORY OF REFRACTORIES AND METALLURGY, WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, WuHan, China;
    Type of Paper: Regular
    Id Paper: 47
    Topic: 7

    Abstract:

    A novel economically process of extracting calcium from Electric Arc Furnace (EAF) slag in a microwave field by using recyclable NH4Cl solution and producing pure precipitate calcium carbonate was proposed. In order to improve the leaching rate of calcium, the calcium-bear phases in the EAF slag and its solubility in the system of NH3-NH4Cl-H2O were analyzed. As the dissolution of calcium from EAF slag is limited by the solubility of CaSiO3, the solubility behavior of CaSiO3 was studied according to the principles of simultaneous equilibrium and aqueous electronic charge neutrality in the system of Ca(II)-NH3-NH4Cl-H2O. The results show that the solubility of Ca(II) increases with the ammonium chloride concentration increasing and the highest solubility is about 0.5 mol/L, however, it decreases slightly with the ammonium hydroxide concentration increasing and the solubility is close to 0 mol/L in pure ammonium hydroxide solution. The equilibrium pH values of the leaching system are between 8.7 and 11.9. The forms of calcium presented in the system tend to be complexes instead of free ion with the increasing concentration of ammonium chloride and ammonium hydroxide.

    Keywords:

    Thermodynamics CaSiO3; Electric Arc Furnace; Mineral carbonation; Ammonia-ammonium chloride solution

    References:

    [1] B.D. Wang, D.X. Yan, J.Z. Jin, et al. BEIJING, Annual Report on China’ Low-Arbon Economic Development (2014), 2014, Social Sciences Academic Press.
    [2] World Steel Association. Annual crude steel production per country and region 1980-2014. http://www.worldsteel.org/dms/internetDocumentList/statistics-archive/production-archive/steel-archive/steel-annually/steel-annually-1980-2014/document/steel%20annually%201980-2014.pdf.
    [3] World Steel Association. Crude steel production data Jan-Mar 2016 vs 2015. http://www.worldsteel.org/dms/internetDocumentList/steel-stats/2016/Crude-steel-production-data-Jan-Mar-2016/document/Crude%20steel%20production%20data%20Jan-Mar%202016%20vs%202015.pdf.
    [4] L. Xiao, R. Wang, P. Chiang, et al. Comparative Life Cycle Assessment (LCA) of Accelerated Carbonation Processes Using Steelmaking Slag for CO2 Fixation. Aerosol and Air Quality Research, 14(2014), 892-904.
    [5] W. Seiftriz. CO2 disposal by means of silicates. Nature, (1990), 345-486.
    [6] Y. Sun, M. Yao, J. Zhang, et al. Indirect CO2 mineral sequestration by steelmaking slag with NH4Cl as leaching solution. Chemical Engineering Journal, 173(2011), 437-445.
    [7] W. Bao, H. Li and Y Zhang. Selective leaching of steelmaking slag for indirect CO2 mineral sequestration. Industrial and Engineering Chemistry Research, 49(2010), 2055-2063.
    [8] S. Teir, S. Eloneva, C. Fogelholm, et al. Dissolution of steelmaking slags in acetic acid for precipitated calcium carbonate production. Energy, 32(2007), 528-539.
    [9] S. Kodama, T. Nishimoto, N. Yamamoto, et al. Development of a new pH-swing CO2 mineralization process with a recyclable reaction solution. Energy, 33(2008), 776-784.
    [10] S. Eloneva, E. Puheloinen, J. Kanerva, et al. Co-utilisation of CO2 and steelmaking slags for production of pure CaCO3-legislative issues. Journal of Cleaner Production, 18(2010), 1833-1839.
    [11] A. Xu, H. Zhang and D. He. Carbonation Behavior Assessment of RH Slag Batch after Aqueous Extraction at Environmental Pressure. Journal of Iron and Steel Research, International, 21(2014), 74-81.
    [12] X.S. Yang. Analysis on ammonia leaching process. Non-Ferrous Mining and Metallurgy, 01(1993), 34-38.
    [13] Zhang H L, He D F, Xu A J, et al. Kinetic Model for Electric Furnace Slag Leaching in CH3COOH Solution. Journal of The Chinese Ceramic Society, 41(2013), 96-102..
    [14] X.L. Zhang, C.B. Nai, J. Cui, et al. Kinetic model with self-resistance factor for electric arc furnace slag leaching in NH4Cl solution. Nonferrous Metals Science and Engineering, (2014), 39-43.
    [15] M.T. Tang, T.C. Zhao. A Thermodynamic Study on the basic and Negative Potential Flelds of The Systems of Sb-S-H2O and Sb-Na-S-H2O. J.CENT.-SOUTH INST.MIN.METALL, (1988), 35-43.
    [16] M.T. Tang, J.L. Lu, Y.S. Yan, et al. On the Ammoniation-Complex Equilibria in The System of Zn(Ⅱ)-NH3-(NH4)2SO4-H2O. J.CENT.-SOUTH INST.MIN.METALL, 6(1994) ,701-705.
    [17] M.T. Tang, T.C. Zhao, J.L. Lu, et al. Principle and Application of The New Chlorination -Hydrolization Process[J]. J.CENT.-SOUTH INST.MIN.METALL, 2(199): 405-411.
    [18] A. Matell and R.M. Smoth. NEW YORK, Critical Stability Constants (Vol. 4): Inorganic Complexes. 1995, Plenum Press.
    [19] D. Wagman, W.H. Evans, V.B. Parker, et al. WASHINGTION, The NBS tables of chemical thermodynamic properties, 1982, The American Chemical Society and the American Institute of Physics for the National Bureau of Standards,.

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    Cite this article as:

    Tong Z, Ma G, Li F, Zhang X, Xue Z. Dissolution Thermodynamics Analysis of CaSiO3 in the System of CaSiO3-NH3-NH4Cl-H2O. In: Kongoli F, Kumar V, Aifantis K, Pagnanelli F, editors. Sustainable Industrial Processing Summit SIPS 2016 Volume 10: Battery, Recycling, Environmental, Mining. Volume 10. Montreal(Canada): FLOGEN Star Outreach. 2016. p. 77-88.