Effect on Sedimentation Characteristics of Bentonite Suspension at Different Conditions

Lin Ling Jiang; Wei Mo; Xiao Jing Yang; Tian Li Xue; Shao Jian Ma

doi:10.4028/www.scientific.net/AMM.333-335.2004

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 333-335Effect on Sedimentation Characteristics of...

Effect on Sedimentation Characteristics of Bentonite Suspension at Different Conditions

Abstract:

To better understand the sedimentation processes of bentonite, the sedimentation characteristic of bentonite suspension was studied by using the sedimentation analysis module of Dynamic Contact Angle Meter and Tensiometer. The results indicated that sedimentation characteristics of bentonite suspension were affected by the concentration and pH values of the suspension together with the dosage of dispersants. The natural sedimentation rates of bentonite suspension declined firstly with prolonging the sedimentation time and soon stabilized after about 50s. The sedimentation weight of particles hardly changed when the concentration ranged from 0.5% to 5.0%, while it increased significantly when ranged from 5.0% to 10.0%. The sedimentation weight and rate were relatively bigger at 4.4, 11.8 than that of 6.0, 7.9, and the maximum values appeared at pH11.8. Adding sodium pyrophosphate could improve the dispersibility of bentonite suspension.

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Periodical:

Applied Mechanics and Materials (Volumes 333-335)

Pages:

2004-2009

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.333-335.2004

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Online since:

July 2013

Authors:

Lin Ling Jiang, Wei Mo, Xiao Jing Yang, Tian Li Xue, Shao Jian Ma

Keywords:

Bentonite, Rate, Sedimentation Characteristics, Weight

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