Download or read book Rheological Study of Kaolin Clay Slurries written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Concentrated kaolin clay slurries are found in a number of industrial operations including mine tailings surface disposal, underground paste backfill, and riverbed dredging. An understanding of the impact of solids concentration and addition of chemical species on slurry rheology is of importance to designers of pipeline transport and waste disposal systems. A project to determine the rheology of an idealized industrial kaolin clay slurry using a concentric cylinder viscometer and an experimental pipeline loop was undertaken. Additional laboratory test work including particle size analysis, slurry pH, calcium ion concentration in the slurry supernatant and particle electrophoretic mobility measurements were completed to aid in the understanding of their effects on the slurry rheology. The slurries were prepared in varying kaolin clay solids concentrations with reverse osmosis water. A flocculant, dihydrated calcium chloride (CaCl2 ¡Þ 2H2O), was added to the reverse osmosis water in concentrations equivalent to those found in typical industrial hard water supply. A dispersant, tetra-sodium pyrophosphate (TSPP, Na4P2O7) was used to disperse the clay particles for selected slurries. It was found that the kaolin clay slurries, in the absence of TSPP, exhibited yield stresses and could be characterized with either the two-parameter Bingham or Casson continuum flow models. Increasing the clay concentration in the slurry, while keeping the mass ratio of flocculant to kaolin constant, increased both the yield and plastic viscosity parameters. There was generally good agreement between the rheological parameters obtained in the Couette flow viscometer and that in the pipeline loop. In slurries for which it was possible to obtain turbulent flow, the transition to turbulent flow was predicted accurately by the Wilson & Thomas method for both Bingham and Casson models. It was possible to eliminate the yield stress of a slurry with the addition of the dispersing agent TSPP. The.
Download or read book Rheological Study of Kaolin Clay Slurries written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Concentrated kaolin clay slurries are found in a number of industrial operations including mine tailings surface disposal, underground paste backfill, and riverbed dredging. An understanding of the impact of solids concentration and addition of chemical species on slurry rheology is of importance to designers of pipeline transport and waste disposal systems. A project to determine the rheology of an idealized industrial kaolin clay slurry using a concentric cylinder viscometer and an experimental pipeline loop was undertaken. Additional laboratory test work including particle size analysis, slurry pH, calcium ion concentration in the slurry supernatant and particle electrophoretic mobility measurements were completed to aid in the understanding of their effects on the slurry rheology. The slurries were prepared in varying kaolin clay solids concentrations with reverse osmosis water. A flocculant, dihydrated calcium chloride (CaCl2 ¡Þ 2H2O), was added to the reverse osmosis water in concentrations equivalent to those found in typical industrial hard water supply. A dispersant, tetra-sodium pyrophosphate (TSPP, Na4P2O7) was used to disperse the clay particles for selected slurries. It was found that the kaolin clay slurries, in the absence of TSPP, exhibited yield stresses and could be characterized with either the two-parameter Bingham or Casson continuum flow models. Increasing the clay concentration in the slurry, while keeping the mass ratio of flocculant to kaolin constant, increased both the yield and plastic viscosity parameters. There was generally good agreement between the rheological parameters obtained in the Couette flow viscometer and that in the pipeline loop. In slurries for which it was possible to obtain turbulent flow, the transition to turbulent flow was predicted accurately by the Wilson & Thomas method for both Bingham and Casson models. It was possible to eliminate the yield stress of a slurry with the addition of the dispersing agent TSPP. The.
Download or read book Rheological Studies of Some Kaolin water Systems written by David Arthur Schulz and published by . This book was released on 1957 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Rheological Approach to Dispersive Clays written by SH. Nickel and published by . This book was released on 1977 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The zone of expansion, formed on a wetted surface of a potentially dispersive clay, is modeled as a dilute clay slurry. This allows existing data from rheological studies of clay slurries to aid the understanding of the failure mechanism of dispersive clays.
Download or read book Mudflow Rheology and Dynamics written by Philippe Coussot and published by Routledge. This book was released on 2017-11-01 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting current knowledge in the field of mudflows, this book includes both rheological mudflow aspects, and information on mudflow characteristics in open channels. It includes sections on: · physical properties of suspensions · shear rheometry with suspensions · rheology of clay-water mixtures · rheology of mud suspensions · gradually and rapidly varied free surface flows Part of the IAHR Monograph Series, this informative book also includes fundamental equations for viscoplastic flows and provides the reader with helpful introductions to all the aspects it covers.
Download or read book A Study of Compaction Effort and Increase in Saturation on the Rheological Properties of Kaolinite Clay written by Jinliang Wang and published by . This book was released on 1968 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Rheological Investigation of Kaolinite Slurries in Terms of Effective Stresses written by Ronald Eugene Bucknam and published by . This book was released on 1964 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rheology Modifiers Applied to Kaolin Bentonite Slurries for SRNL WTP Pulse Jets Tank Pilot Work in Support of RPP at Hanford written by and published by . This book was released on 2005 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Savannah River National Laboratory (SRNL) was tasked to find and characterize the impact of rheological modifiers to a clay (Kaolin-Bentonite) slurry having 23.1 total wt percent solids, 1.165 g/ml, and Bingham Plastic yield stress of 13 Pa and plastic viscosity of 24 mPa-sec. The primary objective was to find rheological modifiers when blended with this clay slurry that would provide a vane yield stress of 300 Pa when the slurry was undisturbed for 24 hours. A secondary objective was to find a modifier that after shearing would produce a Bingham Plastic yield stress of 30 Pa and plastic viscosity of 30 mPa-sec. Two parallel paths were chosen with one examining a variety of organic/inorganic modifiers and another using just the inorganic modifier Laponite (R). The addition of organic modifiers hydroxyethylcellulose, hydroxypropylmethylcellulose, and hydroxypropylcellulose at a target 0.50 wt percent dramatically increased the vane yield stress over the range 311 - 724 Pa, and also increased the Bingham plastic yield stress and plastic viscosities over the range 33-112 Pa and 27-166 mPa-sec, respectively. The organic modifiers also showed elastic behavior, yielding a very unpredictable up flow curve. The 0.50 wt percent addition of inorganic modifiers magnesium aluminum silicate and hydrate magnesium aluminum silicate only increased the vane yield stress to 36-46 Pa and had little impact on the Bingham Plastic parameters. A range of an inorganic (2-4 wt percent magnesium aluminum silicate) and combination of a range of an inorganic (2-3 wt percent magnesium aluminum silicate) and organic (0.03-0.05 wt percent sodium carboxymethylcellulose) modifiers were then tested. These results showed that the target vane yield stress could be obtained but the Bingham Plastic yield stress and plastic viscosity were 3 times too high. Reducing the organic modifier weight percent by a few hundredths, the Bingham Plastic yield stress could be obtained, but then the vane yield stress would be too low. The addition of Laponite (R) (synthetic lithium aluminum silicate) increased the vane yield stress of the clay slurry to values as high as 1500 Pa. However, the flow curve behavior for the laponite samples was not predictable and the secondary objective was dropped based on customer needs and time constraints. Ultimately a 3-wt percent addition of Laponite (R) was chosen to produce a 600 Pa vane yield stress mixture.
Download or read book Surface Chemistry Rheology Consolidation and Shear Behaviours of Kaolin written by Lavanya Avadiar and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: [Truncated] Kaolinite clay is an invaluable mineral used in numerous applications. It is also a waste material found in mineral tailings. Due to its heterogeneous particle surface charges and poor consolidation behaviours, extensive research has been carried out to understand the properties of these particles that could resultantly allow improvements in their consolidation behaviours within mineral tailings. Despite the extensive research carried out on kaolin, paucity in literature exists concerning the possibilities of kaolin particles, in as-received conditions, carrying different elemental compositions that can substantially alter the kaolin particle surface charge, rheology and consolidation behaviours even prior to any manipulation to the particles or slurries. In Chapter 4, it was aimed to display if and how these kaolin particle behaviours alter due to concentrations of elements found naturally and in sufficiently high concentrations on the particle. Results showed that the commercially produced Unimin kaolin particle carries sufficiently high Ca2+ concentrations that caused its zeta potential-pH, yield stress-pH and sedimentation behaviours to vary from that usually displayed by most, pristine kaolin slurries. This result exposes the potential surface charge, rheological and consolidation variability that can exist between commercially produced kaolin powders to suggest that particle characterisation via elemental analysis is required prior to experimental research on the kaolin particles in response to changing conditions.
Download or read book An Investigation of the Rheological Properties and Pipeline Flow Characteristics of Clay Slurries written by M. D. Winning and published by . This book was released on 1948 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rheology Measurements of Hyperconcentrated Slurries written by Keith Satoshi Uemura and published by . This book was released on 1987 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progress and Trends in Rheology II written by H. Giesekus and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: Following an invitation from the Czechoslovakian The scientific programme consisted of 14 plenary delegates at the First Conference of European Rheo lectures as weIl as 310 short presentations, which were logists at Graz in 1982 and adecision by the European held in six parallel sessions in seven half-day sittings. members of the International Committee of Rheology The provision of a reading room containing submitted at the 1983 "Conference of Engineering Rheology" in manuscripts of talks presented at the meeting proved London, the Rheology Group of the Czechoslovak to be popular and seems a worthwhile addition to any Chemical Society (Chairman: Doz. lug. l. Sestak meeting, at least those holding parallel sessions. There CSc.) was entrusted with the organization of the Sec was also a display by nine companies of a wide variety ond Conference of European Rheologists. For an of current rheological instruments. outline of the process leading to the decision to hold The programme for accompanying persons befitted such European meetings, see the Introduction to the the historical significance of the region. The evening Proceedings of the First Conference of European programme included an opening ceremony and recep Rheologists; Rheol Acta 21:355-356 (1982). tion on Monday and an informal banquet on Thurs This Conference was held in the Prague Palace of day as weIl as a visit to the opera.
Download or read book Rheological Study of Coal Slurries written by Carmen Castillo (M.S.) and published by . This book was released on 1978 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rheology of Sand clay Slurries and Gels written by B. Tremblay and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Clays in the Minerals Processing Value Chain written by Markus Gräfe and published by . This book was released on 2017 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clays are increasingly becoming a major problem in the mining, extraction and value-adding processes for a wide range of commodity raw materials. Clays can impact negatively on virtually every unit process within the mining and minerals processing sector, having long-term environmental implications that go well beyond the lifetime of the mining operation. This book is the first to compile, explain and evaluate the effects of clays in the mineral processing value chain, from mining to minerals processing, and finally, tailings disposal. Focusing on topics from the chemistry and rheology of clays to their detection and dissolution behaviour, this book provides comprehensive coverage of the effects on processes such as settling, preg-robing, flotation and comminution. It is an excellent reference for professional mineralogists and geologists, industrial engineers, and researchers interested in clays and clay minerals.
Download or read book The Rheological Properties of Clay water Systems Based on Locally Mined Kaolin written by F. R. G. Gerischer and published by . This book was released on 1980 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Rheological Properties of Clay water Systems Based on Locally Mined Kaolin written by Friedrich Rudolf Gunther Gerischer and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
