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  • 1.
    Addie, G.R.
    et al.
    GIW Industries Inc..
    Roudnev, A.S.
    Weir Minerals North America.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Weir Minerals North America2007In: Hydrotransport 17: the 17th International Conference on the Hydraulic Transport of Solids ; [7 - 11 May 2007, Cape Town, South Africa, South African Institute of Mining and Metallurgy, 2007, p. 205-218Conference paper (Refereed)
    Abstract [en]

    The Hydraulic Institute has completed the task of developing a new ANSI/HI standard 12.1-12.6 (2005) for rotodynamic (centrifugal) slurry pumps covering nomenclature, definitions, applications, and operation. The standard provides examples of the different slurry pump types and contains an extensive section on pump and slurry definitions. The effect of slurry on pump performance is covered along with the pumping of froth. Reference is also made to ANSI/HI standard 9.6.7 (2004), which contains a new method for pump performance correction when handling viscous fluids. Classification of slurry services is established and then is used to determine limitations on velocities and total head per pump in order to obtain acceptable wear performance. The new service class, head per stage and other limits are directly related to capital and other cost considerations that will affect solids transport system economics. The writers review the contents of the new standard, highlight the main points, and discuss the reason for the slurry classification, corresponding limits and expected implications, particularly with respect to operating costs of the pumps in solids transport systems

  • 2.
    Addie, Graeme
    et al.
    Engineering and Research and Development, GIW Industries Inc.
    Carstens, M.
    GIW Industries Inc..
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Visintainer, R.
    GIW Industries Inc..
    Whitlock, L
    Hydraulic Test Lab., GIW Industries Inc.
    Pipeline design characteristics of some industrial paste-like slurries2005In: Conference Proceedings - First Extractive Metallurgy Operators' Conference, The Australian Institute of Mining and Metallurgy , 2005, p. 147-154Conference paper (Refereed)
    Abstract [en]

    There is a wide variety of industrial pastes or non-settling slurries pumped in mining, dredging and reclamation projects as products, refuse and tails. The types and/or names of some of the common ones are alumina red mud, phosphate clays, tar sands mature fine tails, tar sands (CT) consolidated clays and fly ash. The pipeline performance or friction of these varies dramatically with the type, its concentration and the particulars of the actual slurry making it difficult to select pumping equipment and to design associated pipelines. The GIW Hydraulic Laboratory in Grovetown Georgia has tested a number of these slurries over the last 30 years for various mining customers. Where available in the public domain and/or where permission has been obtained, the results of those tests are presented in this paper in a form usable for pipeline and pump system designers and users.

  • 3.
    Addie, Graeme R.
    et al.
    GIW Industries Inc..
    Roudnev, Aleksander S.
    Weir Minerals North America.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    The new ANSI/HI centrifugal slurry pump standard2007In: Journal of the South African Institute of Mining and Metallurgy, ISSN 0038-223X, Vol. 107, no 6, p. 403-409Article in journal (Refereed)
    Abstract [en]

    The Hydraulic Institute has completed the task of developing a new ANSI/HI standard 12.1-12.6 (2005) for Rotodynamic (Centrifugal) Slurry Pumps covering nomenclature, definitions, applications, and operation. The standard provides examples of the different slurry pump types and contains an extensive section on pump and slurry definitions. The effect of slurry on pump performance is covered along with the pumping of froth. Reference is also made to ANSI/HI standard 9.6.7 (2004), which contains a new method for pump performance correction when handling viscous fluids.Classification of slurry services is established and then is used to determine limitations on velocities and total head per pump in order to obtain acceptable wear performance. The new service class, head per stage and other limits are directly related to capital and other cost considerations that will affect solids transport system economics. The writers review the contents of the new standard, highlight the main points, and discuss the reason for the slurry classification, corresponding limits and expected implications, particularly with respect to operating costs of the pumps in solids transport systems.

  • 4.
    Addie, Graeme R.
    et al.
    GIW Industries Inc..
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    A first slurry standard and some implications for paste application2007In: Paste 2007: proceedings of the tenth International Seminar on Paste and Thickened Tailings / [ed] Andy Fourie; Richard Jewell, Perth: Australian Centre for Geomechanics, 2007, p. 153-162Conference paper (Refereed)
    Abstract [en]

    The Hydraulic Institute has just completed the task of developing a new ANSI/HI standard on Rotodynamic (Centrifugal) Slurry Pumps covering nomenclature, definitions, applications, and operation. The standard provides examples of all the different types of pumps available and has an extensive section on definitions. Slurries and their effect on performance and wear are covered. A slurry service class is established which then is used to limit velocities and head produced per pump to give acceptable wear. A special section deals with mechanical seals and a new method for determining flange loads is presented and guidelines are given for commissioning, start-up etc.The head limits and the performance derating are of special interest when centrifugal slurry pumps are applied to thickened tailings and paste-like slurries. For Newtonian liquids, the Hydraulic Institute's Viscosity Correction Method (ANSI/HI 2004) provides a procedure widely used for viscous effects on the performance. For the homogeneous flow of viscous slurries, the new slurry standard refers to an applicable viscosity to use with the method and to "consult the pump manufacturer for guidance regarding non-Newtonian slurry pump performance."Experimental performance results are presented here and applied to the viscosity correction method for a simulated tailings product slurry characterized by a fully sheared yield stress of about 100 Pa, evaluated from pipeline data. The pump was a GIW-LCC type three-vane all metal unit with a 0.3m-diameter impeller having an open shroud with a simple auger-like inducer. Results are also given for an underground hydraulic fill product characterized by a Newtonian kinematic viscosity which is 1300 times that for water. The different results obtained here point out the strong influence the rheological behavior has on the choice of pump size and the power requirement.

  • 5.
    Addle, Graeme R
    et al.
    GIW Industries Inc..
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Design, selection, sizing and control considerations for cyclone feed slurry pumps1999In: Powder Technology, ISSN 0032-5910, E-ISSN 1873-328X, Vol. 104, no 3, p. 233-239Article in journal (Refereed)
    Abstract [en]

    Cyclone feed centrifugal slurry pumps in semi-autogenous grinding (SAG) mill and other cyclone feed circuits see coarse size slurries at high concentrations that can result in high wear if the pump is not designed, selected, sized and operated correctly. The high proportion of static head of the normal cyclone feed circuits usually results in a relatively flat system curve which in conjunction with the typically flat slurry pump curve results in large changes in operating flow with small changes in system head. When this is combined with the normal (or abnormal) fluctuations in the output from the mill upstream of the pumps, any shortcomings in the pump control system and/or matching of the pump means large fluctuations in flow and increased wear. This difficulty could be corrected by continuous variations in speed. A means of control by which the speed is changed in an appropriate way is suggested here. In this case then the pump-input power, the known water performance of the pump and the system flow, can be used to calculate an effective pump discharge pressure. By comparison with a calculated system head, the pump speed can be regulated such that the pressures are equal and the system stable for any practical variation of incoming flow or specific gravity.

  • 6.
    Andreasson, Patrik
    et al.
    Luleå tekniska universitet.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    River flow with excessive suspended sediment load: an evaluation of turbulent flow characteristics1986In: Nordic Hydrology, ISSN 0029-1277, E-ISSN 1996-9694, Vol. 17, no 4-5, p. 383-390Article in journal (Refereed)
    Abstract [en]

    River flows with high volume concentrations (20-50%) of silty sediments generally imply that the mixture has non-Newtonian properties. In this study, the rheological behavior of mixtures with solids particles smaller than 0. 1 mm was identified experimentally with viscosimeters. Characteristic flow parameters, such as energy losses and depths, were then determined in several examples for turbulent open channel flows.

  • 7. Engman, M.
    et al.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Sundqvist, A.
    Goldkuhl, I.
    Wennberg, T.
    Some design considerations of high density base metal tailings handling systems2004In: Proceedings of the 12th international conference on Transport & sedimentation of solid particles joined with 12th international symposium on Freight pipelines: 20-24 September 2004, Prague, Czech Republic, Prague: Institute of Hydrodynamics, Academy of Sciences of the Czech Republic , 2004, p. 307-318Conference paper (Refereed)
  • 8.
    Engman, M.
    et al.
    LKAB.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Sundqvist, Å,
    LKAB.
    Wennberg, Thord
    Goldkuhl, I.
    Multiserv.
    Users perspective on the design of high density base metal tailings systems2004In: Tailings and mine waste '04: Proceedings of the Eleventh International Conference on Tailings and Mine Waste, Rotterdam: Balkema Publishers, A.A. / Taylor & Francis The Netherlands , 2004, p. 45-54Conference paper (Refereed)
  • 9. Eriksson, B.
    et al.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Development of slurry transportation technology in Sweden1978In: Pipes and Pipelines International, ISSN 0370-1204, Vol. 23, no 6, p. 10-13Article in journal (Refereed)
    Abstract [en]

    A system-oriented development project has been started by the LKAB mining company and Chalmers University of Technology (CTH), in co-operation with manufacturers and inventors. The development work has concentrated on improvements of some components and better understanding of specific problems, which, seen together, are believed to be of great interest in slurry transportation applications. So far, a rubber-lined plastic pipe for high-pressure applications has been developed, and a high-pressure pump without large external devices and with a minimum of moving parts is to be patented. Simultaneous laboratory and in-plant tests of the new components have been started, and studies on freezing problems, chemical additives, and secondary flow have also been carried out. A pilot-plant investigation on hydraulic hoisting of heavy ore by centrifugal pumps has been completed at CTH.

  • 10.
    Furlan, John M.
    et al.
    GIW Industries Inc..
    Visintainer, Robert J.
    GIW Industries Inc..
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Centrifugal pump performance when handling highly non-Newtonian clays and tailings slurries2014In: 19th International Conference on Hydrotransport 2014: Golden, 24 - 26 September 2014, Curran Associates, Inc., 2014, p. 117-130Conference paper (Refereed)
    Abstract [en]

    Recent loop testing performed at the GIW Hydraulic Lab (Furlan et al. 2013, 2014) has provided pump performance data for two highly non-Newtonian slurries of significantly different character: a high clay content slurry with minimal coarse solids; and a typical, low clay content, two component tailings slurry. The importance of air removal in the sump and pipe loop was demonstrated using a simple, yet novel de-aeration system. In addition to the measurement of performance losses, determination of the upper limit of "pumpability" for these slurries relative to their concentration and associated yield stress was investigated. However, once the slurry was de-aerated, no limits could be found, other than those dictated by suction side losses (NPSHA) or excessive pipeline friction gradients, indicating that the only true limit in practice is one of system economics, i.e. pump operating and capital cost. Experimentally measured pump head and efficiency were compared against corresponding predictions from two different models: the Walker and Goulas technique (Walker and Goulas, 1983), and the Graham et al. technique (Graham et al., 2009), with special focus given to the dependence of the losses on pump rotary speed.

  • 11.
    Furlan, John M.
    et al.
    GIW Industries Inc., Department of Engineering and R&D.
    Visintainer, Robert J.
    GIW Industries, Department of Engineering and R&D.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Centrifugal pump performance when handling highly non-Newtonian clays and tailings slurries2016In: Canadian Journal of Chemical Engineering, ISSN 0008-4034, E-ISSN 1939-019X, Vol. 94, no 6, p. 1108-1115Article in journal (Refereed)
    Abstract [en]

    Recent loop testing performed at the GIW Hydraulic Lab (Furlan et al. 2013, 2014) has provided pump performance data for two highly non-Newtonian slurries of significantly different character: a high clay content slurry with minimal coarse solids; and a typical, low clay content, two component tailings slurry. The importance of air removal in the sump and pipe loop was demonstrated using a simple, yet novel de-aeration system. In addition to the measurement of performance losses, determination of the upper limit of "pumpability" for these slurries relative to their concentration and associated yield stress was investigated. However, once the slurry was de-aerated, no limits could be found, other than those dictated by suction side losses (NPSHA) or excessive pipeline friction gradients, indicating that the only true limit in practice is one of system economics, i.e. pump operating and capital cost. Experimentally measured pump head and efficiency were compared against corresponding predictions from two different models: the Walker and Goulas technique (Walker and Goulas, 1983), and the Graham et al. technique (Graham et al., 2009), with special focus given to the dependence of the losses on pump rotary speed.

  • 12. Hanaeus, Jörgen
    et al.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Ledningsteknik i kallt klimat: förslag till ramprogram 1983-19861983Report (Other academic)
  • 13.
    Matoušek, Václav
    et al.
    Czech Technical University in Prague Civil Engineering, Prague, Czech Republic.
    Visintainer, Robert
    GIW Industries, Inc., Grovetown, GA, United States.
    Furlan, John
    GIW Industries, Inc., Grovetown, GA, United States.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Threshold Criteria for Components of Predictive Model for Pipe Flow of Broadly-Graded Slurry2018In: ASME 2018 5th Joint US-European Fluids Engineering Division Summer Meeting: Volume 3: Fluid Machinery; Erosion, Slurry, Sedimentation; Experimental, Multiscale, and Numerical Methods for Multiphase Flows; Gas-Liquid, Gas-Solid, and Liquid-Solid Flows; Performance of Multiphase Flow Systems; Micro/Nano-Fluidics, The American Society of Mechanical Engineers , 2018, Vol. 3, article id T19A008Conference paper (Refereed)
    Abstract [en]

    Industrial slurries transported in pressurized pipelines often consist of particles of broad size distribution. The broad particle size distribution affects slurry flow behavior in a pipe. A four-component model (4CM) predicts the frictional pressure drop in pipe flow of broadly graded slurry. The model considers Newtonian carrying liquid and splits the broadly graded solids into fractions (components) each of which contributes to the pressure drop through its own dominating friction mechanism expressed by a particular sub-model in the 4CM. The sorting of the solids into the components (carrier, pseudo-homogeneous, heterogeneous, fully-stratified) must be based on appropriate criteria. For the sake of simplicity, the 4CM currently uses threshold sizes of particles to split the solids into 4 components.

    The goal of the present work is to analyze the existing criteria for the threshold between the pseudo-homogeneous component and heterogeneous component and for the threshold between the heterogeneous component and fully-stratified component. The analysis is based on a description of mechanisms governing particle support (suspension, deposition) of each particular solids component in slurry flow. It shows that the existing grain-size thresholds actually express certain proportions among threshold velocities of flow delimiting different slurry flow regimes. Such threshold velocities are the deposition-limit velocity, the initial-suspension velocity, and the full-suspension velocity. We discuss the proportions and demonstrate how properties (of liquid, solids, flow) and associated parameters additional to the grain size may influence the thresholds.

    The analytical results are supported by experimental results for flow of individual components in a laboratory loop.

  • 14.
    Olsson, Peter
    et al.
    Luleå tekniska universitet.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Energieffektiv gruvluftuppvärmning: preliminär problemanalys med utvecklingsförslag1991Report (Other academic)
  • 15.
    Olsson, Peter
    et al.
    Luleå tekniska universitet.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Vattetrycksreglerade frysskyddsanordningar: översiktlig funktionsstudie1992Report (Other academic)
  • 16.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    A note on depositional behaviour and conduit flow resistance of complex slurries2010In: Conference in Minerals Engineering: Luleå, 2 -3 februari 2010 / [ed] Johanna Alatalo, Luleå: Luleå tekniska universitet, 2010, p. 185-196Conference paper (Other academic)
    Abstract [en]

    Slurries in mineral processing typically have average particles sizes of 20 to 100μm with maximum sizes of up to 500 to 1000μm. With solids volumetric concentrations varying from a few percent up to and over 40% the corresponding slurries are here termed complex because they cover an intermediate area between "non-settling" and "settling" types of mixtures. Depositional and flow resistance behaviours, some of which may be considered counter-intuitive, are discussed based on reported observations with heavy ore concentrates, tailings and sand slurries.

  • 17.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    A systems approach to the handling of mine tailings: with model simulations of some water-related problems1983Report (Other academic)
  • 18.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Advances in thickened tailings pumping using centrifugal pumps2012In: Paste 2012: Proceedings of the 15th International Seminar on Paste and Thickened Tailings, Sun City, South Africa, 16-19 April 2012, Australian Centre for Geomechanics, 2012, p. 285-296Conference paper (Refereed)
  • 19.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Airflow cooling in storm water systems1984In: Proceedings of the Third International Conference on Urban Storm Drainage : Göteborg, Sweden, June 4 - 8, 1984 / [ed] Peter Balmér, Göteborg: Chalmers tekniska högskola , 1984, p. 117-126Conference paper (Refereed)
    Abstract [en]

    Observations have shown that large quantities of ground heat are lost when air flows through storm water systems during cold spells in winter. The temperature distribution in the ground around a storm water pipeline under a street was examined. The non-linear problem of heat conduction with phase change in moist soil was mathematically modelled and the model was used to simulate ground temperature changes caused by the flow of cold air in a buried pipe. Some consequences of airflow cooling are schematically discussed

  • 20.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Choice of operating velocity in vertical solid-water pipeline systems1982In: Hydrotransport 8: Papers Presented at the 8th International Conference on the Hydraulic Transport of Solids in Pipes / [ed] H.S. Stephens, Cranfiled: BHRA Fluid Engineering , 1982, p. 211-226Conference paper (Refereed)
  • 21.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Economical use of water in the extraction of ores: some aspects1980In: Vatten, ISSN 0042-2886, Vol. 36, no 4, p. 312-321Article in journal (Other academic)
  • 22.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Effects of chemical additives on sedimentation during slurry transport1986In: Flocculation, sedimentation and consolidation: proceedings of the Engineering Foundation Conference held at the Cloister, Sea Island, Georgia, USA, January 27-February 1, 1985 / [ed] P. Somasundaran; Brij M. Moudgil, American Institute of Chemical Engineers, 1986, p. 415-425Conference paper (Refereed)
    Abstract [en]

    Effects of chemical additives and a freeze-thaw cycle on the flow of mainly fine-grained industrial slurries are demonstrated based on experimental results and reported pilot-scale tests. The hydrodynamic behaviour of coarse particle transport at very high concentrations is schematically demonstrated by experimental data and it was concluded that the flow cannot generally be represented by a simple rheological model.

  • 23.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Effekter av ytaktiva substanser vid hydraulisk transport av mineraler i rör: interimrapport1981Report (Other academic)
  • 24.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Effektiv rörtransport av avvattnat avloppsslam2003Report (Other academic)
    Abstract [en]

    The balance of the costs for capital, energy, maintenance and boundarylayer polymer injection is described in a model for life cycle cost assessmentsof pumping sewage sludges at a solids content (TS) in the range of15 to 35 %. A design tool for sludge pumping with solid contents of up to8 % is also described. Tests with centrifugal pumps for TS-values of up to10 % are presented.

  • 25.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Ekonomisk drift av slurrypumpinstallationer1986In: Workshop i mineralteknik: Luleå 11-12 februari 1986 / [ed] Börje Sköld; Eric Forssberg, MinFo , 1986, p. 233-250Conference paper (Other academic)
  • 26.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Ekonomisk drift av slurrypumpinstallationer1986Report (Other academic)
  • 27.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    How many industrial slurries behave when transported2015Conference paper (Refereed)
  • 28.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Hydraulic behaviour of ice particles in water: some preliminary results related to the handling of ice from ice-based heat pumps1986In: Hydrotransport: hydraulic transport of solids in pipes ; [proceedings of the 10th International Conference on the Hydraulic Transport of Solids in Pipes, HYDROTRANSPORT 10, held at Innsbruck, Austria, 29 - 31 October, 1986 / [ed] A.P. Burns, Elsevier, 1986, p. 213-217Conference paper (Refereed)
    Abstract [en]

    Heat pumps based on the phase change from ice to water require large quantities of ice being transported hydraulically. Some preliminary pipeline transport parameters have been evaluated from pilot-scale experiments. Furthermore, the dynamics of a large spherical ice particle was observed and compared to the governing hydrodynamic equation.

  • 29.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Hydraulic transport in mining systems of tomorrow2000In: 10th International conference on transport & sedimentation of solid particles: papers presented at the tenth International Conference on Transport & Sedimentation of Solid Particles organized by Agricultural University of Wrocław and held in Wrocław, Poland on September 4-7, 2000, Wrocław: Wydawnictwo Akademii Rolniczej we Wroclawiu , 2000, p. 29-39Conference paper (Refereed)
    Abstract [en]

    The effectiveness of using hydraulic transportation as a link in integrated systems for mining, processing, and waste handling is to be demonstrated and discussed. Hydraulic transportation often requires additional comminution of particles in the mining area; therefore, the concept of slurry pumping from open-pit or underground mines requires the traditional grouping of mining and concentration operations to be broken up. The feasibility of coarse particle pumping is demonstrated for integrated handling of waste rock and tailings with geotechnically stable co-disposal in one disposal area

  • 30.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Hydraulisk transport av fyllnadsmaterial: förstudie1989Report (Other academic)
  • 31.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Icke-newtonsk strömning i bergsprickor: förstudie1983Report (Other academic)
  • 32.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Integration of mine dewatering installations with a hydraulic hoisting system1982In: Proceedings: Seventh International Technical Conference on Slurry Transportation, March 23 - 26, 1982, Lake Tahoe, Nevada / / [ed] Barbara A. Sakkestad, Washington, D.C.: Asociación Internacional de Hispanistas, 1982, p. 75-80Conference paper (Refereed)
  • 33.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Metallutvinning från djuphaven: analys av flerkomponentflöden i rörtransportsystem för mangannoduler1982Report (Other academic)
  • 34.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Mine water: a resource for transportation of ores from underground mines1985In: Mine water: proceedings of the Second International Congress, convened by the International Mine Water Association (IMWA) ... Granada, Spain, September 1985 / [ed] R. Fernández-Rubio, Granada: School of Mines, Department of Hydrogeology , 1985, Vol. 2, p. 1027-1037Conference paper (Refereed)
    Abstract [en]

    In underground mining, a hydraulic hoisting system can increase the hoisting capacity without necessitating the sinking of new shafts. There is generally a considerable inflow of groundwater which has to be pumped out. When the mine dewatering installations are integrated with a hydraulic hoisting system, the cost of power needed to pump out the groundwater is excluded from the costs of hoisting, compared with other modes of transporting the solids to the surface. Different hydraulic systems are analyzed and leading parameters such as total energy consumption and underground water availability, are related systematically to representative solid to water mass ratios and pump efficiencies. The economical effectiveness of integrating the mine dewatering and the hydraulic hoisting system is demonstrated, and finally some schematic layouts of applications are presented

  • 35.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Några strömningsproblem vid mineralbehandling1998In: Konferens i mineralteknik: Luleå, 10-11 februari 1998 / [ed] Marianne Thomaeus; Eric Forssberg, MinFo , 1998, p. 171-Conference paper (Other academic)
  • 36.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Performance of a centrifugal pump when pumping ores and industrial minerals1979In: Hydrotransport 6: Papers Presented at the International Conference on the Hydraulic Transport of Solids in Pipes / [ed] H.S. Stephens, Cranfield: BHRA Fluid Engineering , 1979, p. 291-304Conference paper (Refereed)
    Abstract [en]

    The present study is an experimental investigation of the performance of a rubber-lined centrifugal pump when pumping ores and industrial minerals with concentrations by weight of up to 65-70%. The upper limit of particle size was about 8 mm. The clear water head and efficiency were lowered 30-40% by the coarsest iron ore investigated. Most experimental data were correlated to a formula expressing the influence of solid concentration and solid properties on the reduction in pump head. The drop in efficiency was equivalent to the drop in head up to volumetric concentrations of 20-25%. With higher concentrations the drop in efficiency became greater than the drop in head.

  • 37.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Recirkulation av processvatten i anrikningsverk: en energiresurs1983In: Vatten, ISSN 0042-2886, Vol. 39, no 1, p. 78-87Article in journal (Other academic)
    Abstract [en]

    Savings in energy and water can be effected at Swedish ore-dressing plants if tailings slurry can be thickened more effectively. Most of the water could be re-used directly allowing recovery of energy (heat). The potential in Swedish mines is about 50 GWh, and most of the energy savings would replace oil . The water balance, pH, metal content and sulphate ion content at the Garpenberg works are shown. The degree of direct circulation in the complex flotation of sulphide ores is limited by water-quality problems

  • 38.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Regnvattenavrinning från Bensbyområdet: analys av några observationer1983Report (Other academic)
  • 39.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Restprodukthantering vid mineralberedningsverk: översiktlig värdering av olika förtjockningsgrader1989Report (Other academic)
  • 40.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Rheological analysis of industrial slurries: an investigation of the pipeline transportation characteristics of two limestone products1982Report (Other academic)
  • 41.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Rörtransport av högviskösa medier med centrifugalpumpar1996In: Konferens i mineralteknik: Luleå, 13-14 februari 1996 / [ed] Marianne Thomaeus; Eric Fossberg, MinFo , 1996, p. 197-204Conference paper (Other academic)
  • 42.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Slurry pipeline operations in cold regions: some aspects1983In: Proceedings of the Conference on Pipelines in Adverse Environments II: San Diego, California, November 14-16, 1983 / [ed] Mark B Pickell, New York: American Society of Civil Engineers (ASCE), 1983Conference paper (Refereed)
  • 43.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Slurry pipeline operations in cold regions: some aspects1983Report (Other academic)
  • 44.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Slurry transport: a feasible systems solution to the integrated underground mine of tomorrow1987In: Improvement of mine productivity and overall economy by modern technology: Congress / [ed] Gunnar Almgren; Ivar Berge; Raimo Matikainen, Rotterdam: Balkema Publishers, A.A. / Taylor & Francis The Netherlands , 1987, p. 751-755Conference paper (Refereed)
  • 45.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Slurry transportation: a feasible systems solution in underground mines1982Report (Other academic)
  • 46.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Some environmental consequences of water and energy conservation in the handling of mine tailings in sub-arctic regions1986In: Water Science and Technology, ISSN 0273-1223, E-ISSN 1996-9732, Vol. 18, no 2, p. 141-149Article in journal (Refereed)
    Abstract [en]

    Great savings of energy and water can be obtained at concentrators if the tailings slurry is thickened more effectively and water is reused directly instead of being transported the long way around the disposal area. With direct circulation in sub-arctic regions, large amounts of heating energy can be recovered using a heat pump arrangement. The potential savings at a Swedish concentrator were estimated to be about 10-20 GWh per year, the majority of which would be savings in oil. In cold areas, temperature and hydrological conditions greatly influence spreading and dissipation mechanisms of pollutants released in the process. Monthly variations of the discharge to the recipient of a substance emitted in the process were simulated in an example. The degree of direct circulation in flotation of complex sulphide ores may be limited by water quality problems in the process. A mathematical model was developed and used to simulate the accumulation of a substance in the process for different degrees of direct circulation. Finally, a schematic layout of a simple aeration plant for recycled process water was outlined and some regional water-related problems were discussed

  • 47.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Some temperature effects on slurry rheology in cold regions1987In: Particulate and multiphase processes / [ed] Teoman Airman, Washington, D.C.: Hemisphere Publishing Comp. , 1987, Vol. 3 : Colloidal and interfacial phenomenaConference paper (Refereed)
    Abstract [en]

    Design of mine-tailing pipelines and other short-distance applications involves many of the considerations of long-distance pipeline transportation and is often complicated by variation in particle sizes and solid throughput. In this study, a modified tube viscosimeter is used to obtain rheological data for clay, coal, and iron ore slurries. Temperature-dependent changes in the rheological properties are evaluated for some applications in cold regions. A modified tube viscosimeter was constructed in order to eliminate some correction problems with this type of equipment. Rheological data for clay, coal, and iron ore slurries were obtained with both tube and rotational viscosimeters, which means that a large span of shear rates was investigated. Temperature-dependent changes in rheological properties were evaluated for some applications in cold regions. Freezing is an effective means of thickening fine-particled slurries such as clay-water mixtures and sludges. The rheological results with kaolin and coal slurries showed that the flow properties at constant solids concentration were not changed after a freeze-thaw cycle

  • 48.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Stora regnmängder över gruvområden2006In: Konferens i mineralteknik / [ed] Marianne Thomaeus; Eric Forssberg, Föreningen Mineralteknisk Forskning / Swedish Mineral Processing Research Association , 2006Conference paper (Other academic)
  • 49.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    System aspects on in-pit crushing and coarse-particle pumping2008In: Conference in Minerals Engineering 2008, Luleå: Luleå tekniska universitet, 2008, p. 119-125Conference paper (Other academic)
    Abstract [en]

    The feasibility of pumping tertiary crushed raw ore together with mine water with centrifugal slurry pumps in series is briefly demonstrated in a comparison with truck transport to the processing plant. Pumping can also be effective if considered early in the mine planning because of less waste rock handling. Furthermore, in large-scale open-pit mining, only a 0.5 m-diameter pipeline is required for up to 20 Mtonnes per year. Tertiary crushing with an autogeneous type of crusher giving a comparatively wide particle size distribution may gain some effectiveness in the pumping, however the system integration potential can mainly be related to possible energy savings and increased throughput in grinding operations as outlined by Lindqvist (2008).

  • 50.
    Sellgren, Anders
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
    Systemsapekter på pumpning av sovringsavfall och gråberg1994In: Konferens i mineralteknik: Luleå, 8-9 februari, 1994 / [ed] Marianne Thomaeus; Eric Forssberg, MinFo , 1994, p. 91-97Conference paper (Other academic)
12 1 - 50 of 97
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