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Filtration and Dewatering Characteristics of Nesquehonite Suspensions: Experimental and Modeling

  • Daoguang WANG Zhibao LI Yingjun WANG
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  • 1. Key Lab. Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; 2. Beijing Encryo Engineering and Technology Co., Ltd., Beijing 100015, China

Received date: 2017-02-22

  Revised date: 2017-04-26

  Online published: 2017-12-05

Abstract

The effect of particle characteristics (i.e. particle size and shape), as well as operating conditions (i.e. pressure drop, ionic strength, solid concentration in slurry and filtration temperature) on the settling, filtration and dewatering properties of nesquehonite were investigated. The results showed that the settling rate was strongly dependent on ionic strength and solid concentration. Meanwhile, the filterability, independent of ionic strength, was improved under the conditions of high solid concentration and filtration temperature, low vacuum pressure drop and large crystal size of nesquehonite. Increased dewaterability was revealed at high vacuum pressure drop and solid concentration. Besides, compressibility coefficient and pore size distribution index of nesquehonite cake were determined by further modeling work. Finally, Happel model was used to predict the specific cake resistance with the particle size, average cake porosity and other particle characteristic data of nesquehonite, and the calculated values were in good agreement with experimental data.

Cite this article

Daoguang WANG Zhibao LI Yingjun WANG . Filtration and Dewatering Characteristics of Nesquehonite Suspensions: Experimental and Modeling[J]. The Chinese Journal of Process Engineering, 2017 , 17(6) : 1217 -1226 . DOI: 10.12034/j.issn.1009-606X.217142

References

[1] Ainul A A, David R D, Shane P U, Peter J S. Electrically enhanced dewatering(EED) of particulate suspensions [J]. Colloids and Surfaces A, 2006, 209, 194-205.
[2] Rushton A, Ward A S, Holdich R G. Solid-Liquid Filtration and Separation Technology [M]. Weinheim: Wiley-VCH, 2000, 110-115.
[3] Wakeman R J, Tarleton E S. Filtration: Equipment Selection, Modelling and Process Simulation [M]. Oxford: Elsevier, 1998, 75-92.
[4] Wakeman R J, Tarleton E S. Solid/Liquid Separation: Scale-up of Industrial Equipment [M]. Oxford: Elsevier, 2005, 98-109.
[5] H?nchen M, Prigiobbe V, Baciocchil R, Mazzotti M. Precipitation in the Mg-carbonate system-effects of temperature and CO2 pressure [J]. Chem. Eng. Sci., 2008, 63, 1012-1028.
[6] Kloprogge J T, Martens W N, Nothdurft L, Duong L V, Webb G E. Low temperature synthesis and characterization of nesquehonite [J]. Journal of Materials Science Letters, 2003, 22, 825-829.
[7] K?nigsberger E, K?nigsberger L C, Gamsj?ger H. Low-temperature thermodynamic model for the system Na2CO3-MgCO3-CaCO3-H2O [J]. Geochim. Cosmochim. Acta., 1999, 63, 3105-3119 .
[8] Ballirano P, Vito C D, Ferrini V, Mignardi S. The thermal behavior and structural stability of nesquehonite, MgCO3?3H2O, evaluated by in situ laboratory parallel-beam X-ray powder diffraction: New constraints on CO2 sequestration within minerals [J]. J. Hazard. Mater., 2010, 178, 522-528.
[9] Ferrini V, Vito C D, Mignardi S. Synthesis of nesquehonite by reaction of gaseous CO2 with Mg chloride solution: Its potential role in the sequestration of carbon dioxide [J]. J. Hazard. Mater., 2009, 168, 832-837.
[10] Park A A. Carbon dioxide sequestration: Chemical and physical activation of aqueous carbonation of Mg-bearing minerals and pH swing process [D]. Columbus: The Ohio State University, 2005, 45-56.
[11] Wang Y, Li Z B, Demopoulos G P. Controlled precipitation of nesquehonite by the reaction of MgCl2 with (NH4)2CO3 at 303 K [J]. J. Cryst. Growth, 2007, 310, 1220-1227.
[12] Cheng W T, Li Z B. Controlled supersaturation precipitation of hydromagnesite for the MgCl2-Na2CO3 system at elevated temperatures: chemical modeling and experiment [J]. Ind. Eng. Chem. Res., 2010, 49, 1964-1974.
[13] Cheng W T, Li Z B. Precipitation of nesquehonite from homogeneous supersaturated solutions [J]. Crystal Research Technology, 2009, 44, 937-947.
[14] Cheng W T, Li Z B. Demopoulos G P. Effect of temperature on the preparation of magnesium carbonate hydrates by reaction of MgCl2 with Na2CO3 [J]. Chinese Journal of Chemical Engineering, 2009, 17, 661-669.
[15] Mark A S. The Chemistry and Technology of Magnesia [M]. New Jersey:John Wiley and Sons, 2006, 125-129.
[16] Wang L M. Improvement of performance of sedimentation filtration of Mg(OH)2 slurry [J]. Sea-lake Salt and Chemical Industry, 2002, 31, 22-25.
[17] Wang P, Du G X, Li F. Effect of flocculation of Mg(OH)2 slurry on its filtration property and washing property [J]. Industrial Mineral and Processing, 2008, 3, 20-22.
[18] Li J Q, Wang P, Liu L, Yang S H. Effect on filtration performance of Mg(OH)2 slurry by some factors [J]. Journal of Guizhou University of Technology (Nature Science Edition), 2007, 36, 32-39.
[19] Li Y L, Peng J P, Ni P, Tang R G. Effect of adding seed crystal and flocculant on magnesium hydrate deposition [J]. Inorganic Chemicals Industry, 2008, 40, 26-28.
[20] Besra L, Singh B P, Reddy P S R. Effect of flocculant on settling and filtration of iron ore sludge [J]. Minerals and Metallurgical Processing, 1996, 11, 402-405.
[21] Besra L, Sengupta D K, Roy S K. Particle characteristics and their influence on dewatering of kaolin, calcite and quartz suspensions [J]. International Journal Mineral Processing, 2000, 59, 89-112.
[22] S?hnel O, Garside J. Precipitation: Basic Principles and Industrial Applications [M], London: Butterworth-Heinmann, 1992, 60-68.
[23] Cheng Y S, Fang S R, Tierney J W, Chiang S H. Application of enhanced vacuum filtration to dewatering of fine coal refuse [J]. Separation Science and Technology, 23, 1988, 2113-2130.
[24] Svarovsky L. Solid-Liquid Separation [M], London: Butterworths, 1981, 35-42.
[25] Wakeman R J. Vacuum dewatering and residual saturation of incompressible filter cakes [J]. International Journal Mineral Processing, 1976, 3, 193-206.
[26] Wakeman R. The influence of particle properties on filtration [J]. Separation and Purification Technology, 2007, 58, 234-241.
[27] Ni L A, Yu A B, Lu G Q, Howes T. Simulation of the cake formation and growth in cake filtration [J]. Mining Engineering, 2006, 19, 1084-1097.
[28] Mihoubi D. Mechanical and thermal dewatering of residual sludge [J]. Desalination, 2004, 167, 135-139.
[29] Mihoubi D, Vaxelaire J, Zagrouba F, Bellagi A. Mechanical dewatering of suspension [J]. Desalination, 2003, 158, 259-265.
[30] Holdich R G. Solid-liquid separation equipment selection and modeling [J]. Minerals Engineering, 2003, 16, 75-83.
[31] Jenny N M, Gerg F. Dend-end filtration of yeast suspensions: Correlating specific resistance and flux data using artificial neural networks [J]. Journal of Membrane Science, 2006, 281, 325-333.
[32] Tiller F M, Cooper H. The role of porosity in filtration, Part V: Porosity variation in filter cakes [J]. AIChE Journal, 1962, 8, 445-449.
[33] Hulston J, Kretser R G, Scales P J. Effect of temperature on the dewatering of hematite suspensions [J]. International Journal Mineral Processing, 2004, 3, 269-279.
[34] Happel J. Viscous flow in multiparticle systems Slow motion of fluids relative to beds of spherical particles [J]. AIChE Journal, 1958, 4, 197-201.
[35] Sluis S V D, Leenhouts W P, Wesselingh J A. Filtration and washing of calcium sulphate/phosphoric acid slurries [J]. Filtration and Separation, 1989, 26, 105-112.
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