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Kinetics of desilification pretreatment from high-aluminium coal fly ash in alkaline medium under pressure

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Abstract

In this paper, desilification for high-aluminium coal fly ash in alkaline media under pressure was reported to improve the efficiency of sodium leaching. Factors such as the alkaline quantity, reaction temperature, time and liquid-to-solid ratio on desilification were studied in detail. At the same time, the kinetics of desilification were analysed to further reveal the leaching mechanism. The results showed that the alkaline quantity, reaction temperature and liquid-to-solid ratio had significant effects on the desilification efficiency with increasing reaction time. The maximum SiO2 leaching rate was 65.78% under the optimal experimental conditions. According to the shrinking core model, the process of leaching is controlled by surface chemical reactions in the earlier stage and diffusion of the solid layer in the later stage.

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References

  1. Sun Q. W., Gao L., Wang H., Li Y. F., Ding N., J. Liaoning Techn. Univ.(Natural Science), 2013, 32(6), 759

    CAS  Google Scholar 

  2. Fang Y. H., Cheng L. Q., Gong Y. F., Yang W. J., J. Chinese Ceram. Soc., 2015, 43(2), 165

    CAS  Google Scholar 

  3. Risto P., Mikko M., Gary W., Hannu N., Olli D., Trans. Nonferrous Met. Soc. China, 2016, 26(1), 256

    Article  Google Scholar 

  4. Shi Y. F., Chen Y., Zhang Y. W., Zhang Q., J. Northeast Dianli Univ., 2015, 35(6), 59

    Google Scholar 

  5. Wei L. H., Ye N. J., Zhu C. F., Liu G. N., Xing H. X., Zhou K., Geo-logical J. China Univ., 2013, 19(4), 683

    CAS  Google Scholar 

  6. Marinna G., Jaume P., Desalin. Water Treat., 2016, 57(4), 1857

    Article  Google Scholar 

  7. Jia Y. P., Zong Q., Jiang X. P., Zhang Y. X., Yuan Z. F., J. Northeast Dianli Univ., 2014, 34(6), 34

    CAS  Google Scholar 

  8. Song J. G., Romerb C. E., Yao Z., He B. S., Fuel, 2016, 172(5), 20

    Article  CAS  Google Scholar 

  9. Li M. H., Zhang Y. J., Chen H., Zhao J. M., J. Southwest Jiaotong Univ., 2015, 50(2), 342

    Google Scholar 

  10. Lu M., Li F. Y., Lv X., Xu X. H., Yu C. Y., Yao L. L., J. Northeast Dianli Univ., 2014, 34(6), 21

    Google Scholar 

  11. Zhu P. W., Dai H., Han L., Xu X. L., Cheng L. M., Wang Q. H., Shi Z. L., J. Zhejiang Univ., 2015, 16(2), 161

    Article  CAS  Google Scholar 

  12. Xue R. J., Lan W. X., Li S., Nie H. Q., J. China Univ. Mining & Technol., 2010, 39(6), 907

    CAS  Google Scholar 

  13. Chen Y. G., Xie C. H., Han H. J., Chem. J. Chinese Universities, 2015, 36(2), 229

    CAS  Google Scholar 

  14. He S. Y., Li H. Q., Li S. P., Li Y. H., Xie Q., Chinese J. Nonferrous Met., 2014, 24(7), 1888

    CAS  Google Scholar 

  15. Wang R. C., Zhai Y. C., Ning Z. Q., Ma P. H., Trans. Nonferrous Met. Soc. China, 2014, (24), 1928

    Article  CAS  Google Scholar 

  16. Jiang Z. Q., Yang J., Ma H. W., Wang L., Ma X., Trans. Nonferrous Met. Soc. China, 2015, 25(6), 2065

    Article  CAS  Google Scholar 

  17. Du Z. C., Li H. Q., Bao W. J., Li S. P., Cai W. Q., Chinese J. Proc. Eng., 2011, 11(3), 442

    CAS  Google Scholar 

  18. Tan H. B., Ma X. L., Wang Y. S., Coal Sci. Technol., 2007, 35(11), 84

    Google Scholar 

  19. Wei F. S., Mornitoring and Analysis Methods in Water and Wastewa-ter, China Invironmental Science Press, Beijing, 2002, 165

    Google Scholar 

  20. Tkacovo K., Balaz P., Hydrometallurgy, 1993, 33(3), 291

    Article  Google Scholar 

  21. Ekinci Z., Colak S., Cakici A., Miner. Eng., 1998, 11(3), 279

    Article  CAS  Google Scholar 

  22. Li H. G., Metallurgical Principles, Science Press, Beijing, 2012, 67

    Google Scholar 

  23. Li H. G., Hydrometallurgy, Central South University Press, Chang-sha, 2002, 132

    Google Scholar 

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Authors and Affiliations

  1. School of Chemical Engineering, Northeast Electric Power University, Jilin, 132012, P. R. China

    Min Lu & Yanwei Chang

  2. Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, Texas, 77843-1266, USA

    Long Chen

Authors
  1. Min Lu
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  2. Yanwei Chang
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  3. Long Chen
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Corresponding author

Correspondence to Min Lu.

Additional information

Supported by the Natural Science Foundation of Jilin Province, China(No.20130206059GX), the Doctor Science Research Starting Projects of Northeast Electric Power University, China(No. BSJXM-2013) and the 12th Five-Year Enhancing Innovation Projects of Northeast Electric Power University, China (No.2013-14).

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Lu, M., Chang, Y. & Chen, L. Kinetics of desilification pretreatment from high-aluminium coal fly ash in alkaline medium under pressure. Chem. Res. Chin. Univ. 33, 282–286 (2017). https://doi.org/10.1007/s40242-017-6230-y

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  • DOI: https://doi.org/10.1007/s40242-017-6230-y

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