• polymer flocculation of calcite: experimental results

    Polymer flocculation of calcite: Experimental results

    Calcite flocculation by Rheomax® DR 1050 was contrasted against an acrylamide/acrylate copolymer. The latter was superior in a solids concentration range of 20-40 kg m-3, while the optimum for

  • polymer flocculation of calcite: experimental results

    Polymer flocculation of calcite: Experimental results

    The kinetics of aggregation/breakage of calcite particles flocculated with a high‐molecular‐weight polymer flocculant has been studied in turbulent pipe flow. The mean flocculation residence time was varied by changing the length of pipe between the flocculant injection point and the in‐stream particle‐sizing probe (Lasentec FBRM). A

  • polymer flocculation of calcite: experimental results

    Polymer flocculation of calcite: Experimental results

    The AIChE Journal is the premier research monthly in chemical engineering and related fields.

  • polymer flocculation of calcite: experimental results

    Polymer flocculation of calcite: Experimental results

    The kinetics of aggregation/breakage of calcite particles flocculated with a high-molecular-weight polymer flocculant has been studied in turbulent pipe flow. The mean flocculation residence time was varied by changing the length of pipe between the flocculant injection point and the in-stream particle-sizing probe (Lasentec FBRM). A variety of pipe sizes and flow rates were used to produce a

  • polymer flocculation of calcite: relating the aggregate

    Polymer flocculation of calcite: Relating the aggregate

    Experimental. Aggregation of calcite (Omyacarb, Commercial Minerals) with a commercial 30% anionic high‐molecular‐weight polymer (Nalco 9902) was performed in a linear horizontal pipe reactor, as previously described. 53 The flocculation conditions are summarized in Table 1.

  • polymer flocculation of calcite: experimental results

    Polymer flocculation of calcite: Experimental results

    Polymer flocculation of calcite: Experimental results from turbulent pipe flow. Abstract The kinetics of aggregation/breakage of calcite particles flocculated with a high‐molecular‐weight polymer flocculant has been studied in turbulent pipe flow.

  • polymer flocculation of calcite: relating the aggregate

    Polymer flocculation of calcite: Relating the aggregate

    Calcite flocculation by Rheomax® DR 1050 was contrasted against an acrylamide/acrylate copolymer. The latter was superior in a solids concentration range of 20-40 kg m-3, while the optimum for

  • polymer flocculation of calcite: experimental results

    Polymer flocculation of calcite: Experimental results

    Polymer flocculation of calcite: Experimental results from turbulent pipe flow . By A.R. Heath, P.A. Bahri, P.D. Fawell and J.B. Farrow. Abstract. The kinetics of aggregation/breakage of calcite particles flocculated with a high-molecular-weight polymer flocculant has been studied in turbulent pipe flow. The mean flocculation residence time was varied by changing the length of pipe between the

  • polymer flocculation of calcite: population balance model

    Polymer flocculation of calcite: Population balance model

    A population balance (PB) model is used to describe the aggregation/breakage kinetics of calcite flocculation in turbulent pipe flow. The model describes simultaneous aggregation and breakage, and

  • bridging flocculation by polymers researchgate

    Bridging Flocculation by Polymers ResearchGate

    In the present study, from the simulated results based on the model and experimental data, we obtained the following knowledge: 1) the intermittent addition of polymer flocculant gives better and

  • polymer flocculation of calcite: experimental results

    Polymer flocculation of calcite: Experimental results

    Polymer flocculation of calcite: Experimental results from turbulent pipe flow. Abstract The kinetics of aggregation/breakage of calcite particles flocculated with a high‐molecular‐weight polymer flocculant has been studied in turbulent pipe flow.

  • polymer flocculation of calcite: experimental results

    Polymer flocculation of calcite: Experimental results

    Polymer flocculation of calcite: Experimental results from turbulent pipe flow . By A.R. Heath, P.A. Bahri, P.D. Fawell and J.B. Farrow. Abstract. The kinetics of aggregation/breakage of calcite particles flocculated with a high-molecular-weight polymer flocculant has been studied in turbulent pipe flow. The mean flocculation residence time was varied by changing the length of pipe between the

  • flocculation an overview sciencedirect topics

    Flocculation an overview ScienceDirect Topics

    Our experimental results have shown that flocculation effectiveness of 96-100% can be achieved at pH = 6.5-7.5 when chitosan is used as a flocculant in humic acid solutions Fig.1. This figure also illustrates that too high content of chitosan is resulted in the flocculation effectiveness reduction because of the stabilization of humic

  • bridging flocculation by polymers jst

    Bridging Flocculation by Polymers JST

    A comprehensive evaluation of flocculation processes is presented with emphasis on physical and engineering aspects. Flocculation by polymer bridging involves three basic sub-processes: mixing of the polymer with the particle suspension, adsorption of the polymer on particle surfaces and the formation and growth of flocs.

  • polymer flocculation of calcite: relating the aggregate

    Polymer flocculation of calcite: Relating the aggregate

    The AIChE Journal is the premier research monthly in chemical engineering and related fields.

  • the impact of achieving a higher aggregate density

    The impact of achieving a higher aggregate density

    The impact of achieving a higher aggregate density on polymer-bridging flocculation Article in International Journal of Mineral Processing 124:83–94 · November 2013 with 201 Reads

  • polymer flocculation of calcite: experimental results

    Polymer flocculation of calcite: Experimental results

    Información del artículo Polymer flocculation of calcite: Experimental results from turbulent pipe flow

  • selective flocculation

    Selective Flocculation

    Selective Flocculation process development generally involves single mineral flocculation tests to identify the appropriate polymer and experimental conditions for achieving the desired selectivity. Invariably the selectivity predicted on the basis of such tests is not realized when mixed mineral tests are conducted. A systematic experimental

  • transfer and degradation of polyacrylamide-based

    Transfer and degradation of polyacrylamide-based

    2014-09-26· The aim of this review was to summarize information and scientific data from the literature dedicated to the fate of polyacrylamide (PAM)-based flocculants in hydrosystems. Flocculants, usually composed of PAMs, are widely used in several industrial fields, particularly in minerals extraction, to enhance solid/liquid separation in water containing suspended matter. These polymers can contain

  • paper: why small-scale testing of reagents goes wrong

    Paper: Why small-scale testing of reagents goes wrong

    Abstract: Small-scale cylinder or jar tests are routinely applied to establish the impact of polymer reagents that induce aggregation in mineral systems. Despite their value, such tests are often done poorly or under too narrow a range of conditions, which can

  • breakup of fractal flocs in a turbulent flow langmuir

    Breakup of Fractal Flocs in a Turbulent Flow Langmuir

    A simple model of the breakup of a floc in a turbulent flow is proposed by analogy with that of a droplet. In the model, the strength of a floc is expressed as a product of the cohesive force between primary particles and the number of contacts between clusters in the floc. To confirm the validity of this model, three types of polystyrene latex flocs with different fractal dimensions were

  • polymer flocculation of calcite: relating the aggregate

    Polymer flocculation of calcite: Relating the aggregate

    Calcite particles were flocculated in turbulent pipe flow and the aggregates sized with an in situ probe (Lasentec FBRM). The flocculated suspension then flowed into vertical column used to measure the hindered settling velocity. This allowed the investigation of key flocculation parameters — the flocculant dosage, the primary particle size

  • the impact of achieving a higher aggregate density

    The impact of achieving a higher aggregate density

    2013-11-14· Being near the optimal solid fraction is crucial to flocculation in thickeners. • Calcite flocculation kinetics was measured in turbulent pipe flow with FBRM detection. • Two flocculants were studied, with one giving a higher optimal solid fraction. • Modelling of the results supports this being due to a higher aggregate density. •

  • thickener technology publications csiropedia

    Thickener technology publications CSIROpedia

    The following publications detail the work involved in the development of CSIRO’s Thickener technology for mineral processing.. Book chapters. Hecker R, Jefferson A, Fawell PD, Farrow JB, 1999, ‘The characterisation of polyacrylamide flocculants by flow field-flow fractionation combined with multi-angle laser light scattering’, In: Polymers in Mineral Processing, Laskowski JS (ed), Canad.

  • polymer flocculation of calcite: relating the aggregate

    Polymer Flocculation of Calcite: Relating the Aggregate

    Polymer Flocculation of Calcite: Relating the Aggregate Size to the Settling Rate Alex R. Heath A.J. Parker Cooperative Research Centre for Hydrometallurgy (CSIRO

  • australian centre for geomechanics conference paper: 20

    Australian Centre for Geomechanics Conference Paper: 20

    Abstract: As the expectations for more consistent and higher density thickened and paste tailings increase, so do the demands on thickener performance. Over the last 20 years, the AMIRA P266 “Improving Thickener Technology” series of projects, have significantly advanced the understanding of thickening by combining fundamental investigations of flocculation, advanced mathematical and

  • polymer flocculation of calcite: relating the aggregate

    Polymer flocculation of calcite: Relating the aggregate

    The initial hindered settling velocities of flocculated calcite suspensions have been related to the mean aggregate sizes and solid fraction under a range of flocculation conditions that are similar

  • monitoring polymer flocculation in oil sands tailings: a

    Monitoring polymer flocculation in oil sands tailings: A

    This study was the first effort to model polymer-promoted flocculation in oil sands tailings. Population balances were developed and online in situ FBRM experimental data were used to model polymer flocculation of oil sands mature fine tailing (MFT) in a batch stirred tank set-up.

  • polymer flocculation of calcite: population balance

    Polymer flocculation of calcite: Population balance

    2006-05-01· Read "Polymer flocculation of calcite: Population balance model, Aiche Journal" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • non-adsorbing polymers and yield stress of cement paste

    Non-adsorbing polymers and yield stress of cement paste

    Experimental results 3.1. Adsorption measurements . We first checked that PEGs have no affinity with cement and calcite surface and we measured the adsorption isotherms of PCE (see Fig. 3). Our results are in agreement with literature [39,40]. PEGs do not adsorb on cement and calcite surface and stay in the pore solution. We note an increase of the PCE adsorbed amount with dosage along with an

  • analysis and optimization of coagulation and flocculation

    Analysis and optimization of coagulation and flocculation

    Optimization of process parameters is vital for the effectiveness of coagulation process. In the present study optimization of parameters like pH, dose of coagulant and mixing speed were studied using natural coagulants sago and chitin in comparison with alum. Jar test apparatus was used to perform the coagulation. The results showed that the

  • modeling of flocculation and sedimentation using

    Modeling of Flocculation and Sedimentation Using

    Flocculation is a special phenomenon for fine sediment or silt in reservoirs and estuaries. Flocculation usually results in changes of size, morphology, and settling velocity of sediment particles and finally changes of bed topography of reservoirs and estuaries. The process of flocculation and sedimentation was simulated based on population balance modeling (PBM) and computational fluid

  • the impact of achieving a higher aggregate deepdyve

    The impact of achieving a higher aggregate DeepDyve

    2013-11-14· Read "The impact of achieving a higher aggregate density on polymer-bridging flocculation, International Journal of Mineral Processing" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • polymer flocculation of calcite: experimental results

    Polymer flocculation of calcite: Experimental results

    Información del artículo Polymer flocculation of calcite: Experimental results from turbulent pipe flow

  • fundamental study on polymer flocculation behavior

    Fundamental Study on Polymer Flocculation Behavior

    polymer adsorption, resulting in poor chi-g-PAM flocculation performance. iii Acknowledgement I want to convey my sincere gratitude to my supervisors, Dr. Hongbo Zeng and Dr. Qingxia (Chad) Liu for their guidance and support for my research study and life in University of Alberta. I want to give my special thanks to Dr. Hongbo Zeng for each advice, criticism, and encouragement on experiment

  • flocculation of fine fluorite particles with

    FLOCCULATION OF FINE FLUORITE PARTICLES WITH

    This work aimed to study, comparatively, the flocculation of fluorite particles with Corynebacterium xerosis cells and three commercial long chain polymers. Best flocculation results were obtained with cells of C. xerosis and with an anionic polyacrylamide. Both were effective in

  • flocculation of fine particles in ceramic wastewater

    Flocculation of Fine Particles in Ceramic Wastewater

    Flocculation of Fine Particles in Ceramic Wastewater by Using Polymers Vedat DENIZ1), experimental studies were assessed with the change in the interfaces height during sedimentation resultant. The best performance was ob- tained Superfloc A-130. At the dose of 60 g/t for A-130, the settling rate was shorter than 60 seconds. Keywords: ceramic wastewater, sedimentation, flocculation

  • latices as flocculants in selective flocculation

    Latices as flocculants in selective flocculation

    The flocculation results with all the tested latices reveal that, at a same dosage of latices and their natural pulp pH, the P(EHMA) latex produced a higher flocculation recovery of fluorite, apatite and calcite than the other two latices, polystyrene and P(MAAA). The P(EHMA) and P(MAAA) latices all exhibit a higher flocculation recovery of

  • engi 9628 environmental laboratory lab #5 jar testing

    ENGI 9628 Environmental Laboratory Lab #5 Jar Testing

    The following results were achieved after a series of jar test on two sample waters, A and B, were treated with two different coagulants, alum and ferric chloride, at varying doses. Water A had low alkalinity and required less coagulant to achieve good coagulation and flocculation than the higher alkalinity of Water B. This is seen by the

  • combined population balance and cfd modelling of

    COMBINED POPULATION BALANCE AND CFD MODELLING OF

    experimental result that a higher shear rate gives a faster initial aggregate growth, but ultimately produces smaller aggregates due to the increased (and dominant) breakage rate. Aggregation by high molecular weight polymer flocculants (as widely used in mineral processing thickeners or clarifiers) differs from aggregation by ionic coagulants

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