Surface Potential of Coal Particles in Coal-Oil Mixture and Control of Settling Stability Under Gravity |
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| Authors: | Qindao Wang Genxiang Luo Jiayu Niu Jun Jin |
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| Institution: | 1. Vocational and Technology College, Liaoning Shihua University , Fushun, Liaoning, P. R. China;2. Department of Chemistry, School of Chemistry and Materials Science , Liaoning Shihua University , Fushun, Liaoning, P. R. China;3. Research Institute of Petroleum Exploration &4. Development , Petrochina, Beijing, P. R. China |
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| Abstract: | This work deals with the problem of settling under gravity for coal-oil mixtures when the concentration of particles is large. The repulsive force necessary to ensure stability of coal particle is vital. The net forces acting on the particle include gravity, buoyancy, viscous drag force, and electrostatic repulsive force. Accordingly, the equation at the terminal velocity at settling is obtained along with a critical surface potential to prevent settling under gravity. |
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| Keywords: | Coal/oil mixture settling surface potential terminal velocity |
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