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Sodium-modification of Ca-based bentonite via semidry process

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Abstract

In order to improve the quality of Hunyuan inferior Ca-based bentonite (Ca-Bent), semidry process was used to modify Ca-Bent into superior Na-based bentonite (Na-Bent). The factors affecting sodium-modification were investigated. The optimized experimental parameters are obtained as follows: Na2CO3 dosage 4.0%, ageing time 25 d, briquetting pressure 25 MPa and briquetting moisture 20%. Under the optimization conditions, the modified Na-Bent has a colloid value of 73.6 mL/(3g), dilation of 38 mL/g and water absorption in 2 h (2HWA) of 465%, respectively. The balling results indicate that the modified Na-Bent pellets have higher drop strength and compression strength than the Ca-Bent pellets.

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Authors and Affiliations

  1. School of Resources Processing and Bioengineering, Central South University, Changsha, 410083, China

    Yan-fang Huang  (黄艳芳), Yuan-bo Zhang  (张元波), Gui-hong Han  (韩桂洪), Tao Jiang  (姜涛), Guang-hui Li  (李光辉), Yong-bin Yang  (杨永斌), Bin Xu  (许斌) & Yu-feng Guo  (郭宇峰)

Authors
  1. Yan-fang Huang  (黄艳芳)
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  2. Yuan-bo Zhang  (张元波)
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  3. Gui-hong Han  (韩桂洪)
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  4. Tao Jiang  (姜涛)
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  5. Guang-hui Li  (李光辉)
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  6. Yong-bin Yang  (杨永斌)
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  7. Bin Xu  (许斌)
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  8. Yu-feng Guo  (郭宇峰)
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Corresponding author

Correspondence to Yuan-bo Zhang  (张元波).

Additional information

Foundation item: Project(50725416) supported by the National Science Fund for Distinguished Young Scholars; Project(50804059) supported by the National Natural Science Foundation of China; Project(2008BAB32B06) supported by the Key Project in the National Science and Technology Pillar Program during the 11th Five-Year Plan Period; Project(200805331080) supported by the Specialized Research Fund for the Doctoral Program of Higher Education

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Huang, Yf., Zhang, Yb., Han, Gh. et al. Sodium-modification of Ca-based bentonite via semidry process. J. Cent. South Univ. Technol. 17, 1201–1206 (2010). https://doi.org/10.1007/s11771-010-0619-9

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  • DOI: https://doi.org/10.1007/s11771-010-0619-9

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