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J4 ›› 2012, Vol. 20 ›› Issue (1): 89-93.

• article • Previous Articles    

Study on Sodium-modified Suspensoid Process of Bentonite

WANG Hong1,HUANG Li2,GUO Jinyi1,HU Jiehua1,CHEN Qijie1,MA Long1   

  1. 1.Xiamen Zijin Mining and Metallurgy Technology Co.,Ltd.,Xiamen   361101,Fujian,China;
    2.Xiamen Entry-Exit Inspection and Quarantine Bureau,Xiamen   361026,Fujian,China
  • Received:2011-11-20 Revised:2012-01-06 Online:2012-02-28 Published:2012-05-30

Abstract:

Na-bentonite has better properties than Ca-bentonite,such as high swelling volume,high cation exchange capacity and good colloid suspensibility.Therefore,the Ca-bentonite is sodium activated to improve properties and application values.The principle and process of sodium-modification were summatized in this paper. Compared to other processes,the suspensoid method was mainly introduced.In order to improve physical and chemmical properties of the modified bentonite,the effecting factors of the suspensoid process including the modifying agent types, the modified temperature and pH value were discussed systematicly.The best reaction conditions were as following: the modifying agent was NaCO3,its dosage was 4%,the pH value was 9~10, and the modified temperature was 70 ℃.Also,to obtain high value-added production,the focus of research is to optimize suspensoid process conditions in future.

Key words: Bentonite, Sodium-modification, Suspensoid process

CLC Number: 

  • TQ062

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