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Rheology Applied to the Study of Flocculated and Thickened Nickel Tailings for Waste Minimization in the Mineral Industry Bruna Trampus and S237;lvia Fran231;a Center for Mineral Technology, CETEM, Brazil ABSTRACT The dry disposal of mineral tailings is a better alternative for containment, because it
Aug 21, 20180183;32;Feb 1, 2018 Division of Mining and Geotechnical Engineering Norwegian University of Science and Technology tailings dams is essential, and a proper management of the tailings is .. facilitating hydraulic delivery to the storage facility. .. be based on factors such as tailings properties, slurry rheology, facility.
RHEOLOGY Rheology is the science of the flow of matter. Applications may include pipeline transportation, ore beneficiation, autoclave feeding and operation, solid/ liquid separation processes, heat exchanger design, etc. Rheology testing is imperative for capital intensive unit operations that are mass and/or energy transfer based.
Figure 1 Beach slope for HDTT (left image shows fresh meander path; right image shows paste beach slope from right to left (169; Jon Engels) Introduction Definition of beach slope. Beach slope in the tailings industry refers to the surface slope of the tailings after being hydraulically or mechanical deposited from a point of discharge.
Specialised Tailings Testing. ATC Williams have been testing mining tailings for over 20 years and have a substantial database of test results, many of which
For the first tailings material, for both flocculants, the rheological behaviour was essentially very similar for each test. Furthermore, there was no evidence of structural rebuild of the polymeric agglomerates. The second tailings sample material was sensitive to both flocculant type and shear history.
An example of rheology test results from a slurry loop are shown in Fig 5. Example Application of Slurry Rheology for a Tailings Pipeline An iron ore processing plant located in the Pilbara Region of Western Australia was undergoing a raise in the wall height for the storage facility to
Tailings are leftover mineral byproducts of ore processing. The composition of tailings depends on the composition of the ore and the extraction process used to obtain the ore. Tailings typically consist of finely ground rock, processing chemicals, and small quantities of metals found in the host ore.
significant rheology reduction can be achieved by shearing the tailings. A correlation between shear device energy input and rheology reduction has been obtained. 1 Introduction The rheological properties of flocculated thickened and paste tailings can be altered by breaking the floc aggregate structures by shearing the mixture.
The main conclusions derived from this study are summarized as follows (1) A series of the rheological test were performed on iron tailings at various mass concentrations. The shear rate used in this research increases from 0 s 1 to 120 s 1 and then drops from 120 s 1 to 0
To develop the analysis, the following steps were considered laboratory test work including tailings rheology characterization and particle size distribution, flow and pressure data collection, hydraulic model preparation and calibration for a number of scenarios.
Of particular interest is the rheology and pipe loop testing for slurry transport and the predicting of tailings behaviours. As global specialists in life of mine tailings management we realise that high quality design in tailings transport and storage facility is vital.
A fluidised bed column test has been developed by the authors with the objective of obtaining data on the segregation and segregated rheology of a tailings slurry as this flows down a beach on a tailings
Field Rheology of Mine Tailings Practical Applications Deposits Formed by Flowing Tailings Rheology = Laboratory Better Suited for Test Matrices on Small Volumes (Design) Field Better Suited for Understanding Operational Variability (Design Operation)
Lessons learnt Tailings rheology No theoretical models exist to determine rheological parameters WITHOUT test data The most widely used model is the two parameter Bingham
Beach slope in the tailings industry refers to the surface slope of the tailings after being hydraulically or mechanical deposited from a point of discharge. This is the slope the tailings settle at after being discharged from the end of a pipe.
Since the dewatering behaviour and handling ability of the tailings is dominated by the characteristics of the swelling clay, a good understanding of the surface chemistry of the clay and its effects on the relevant engineering properties, such as sedimentation and rheology is required for more efficient dewatering and disposal of clay based coal tailings.
DISCUSSION ON THE INFLUENCE OF MINERALOGY ON THE RHEOLOGY OF TAILINGS SLURRIES Gordon McPhail conducted extensive rheology testwork on a number of slurries that have shown unexpectedly high settling out of the slurry during the test, a common issue with mill tailings.
AN ANALYTICAL MODEL FOR TAILINGS DEPOSITION DEVELOPED FROM PILOT SCALE TESTING extend the flume test results and evaluate the determined by the rheology of the NST. The rheology of the carrier fluid determines the sand settling rate, given a shear rate profile in
rheology of a mineral sand tailings. Thickened and Paste Tailings Pipeline System Design Procedure Part 1, Page 5 For cemented pastes, the flow property tests should be
Created a strength model for tailings and artificial Silica sand as a function of curing time and cement content by undergoing Uniaxial Compressive Strength test, Slump test and Rheology test. Strength variation between existing backfill and tailings blended with artificial sand were analysed.
Tailings dams are made up of mining residue deposits, and they represent a high risk, in terms of mechanical instability. In the event of collapse, the tailings in such dams may be released and flow over long distances, with the potential risk of extensive damage to property and life.
conducted extensive rheology testwork on a number of slurries that have shown unexpectedly high variation in rheological parameters. Such variability complicates the design and specification of thickeners as well as pumping and piping systems for the delivery of the tailings to the tailings storage facility.
As stated earlier.2 Sample pipehead flocculation Two types of flocculant were tested on both the tailings samples for pipehead flocculation. the rheological behaviour was essentially very similar for each test.Evaluation of the rheology of pipehead flocculated tailings PT Slatter and KD Seddon 3 Rheological sample preparation 3.
The rheology, and the distance and elevation between the thickener and the deposition site determines the pumping and pipeline requirements, explained Tyson Gollaher, paste group manager, WesTech 3/5 Design Considerations for a Tailings Disposal System Thursday, 21 October 2010 2140 Engineering.
The rheology of most mineral tailings is governed primarily by the surface chemistry of the fine particles in the suspension , . Modification of the rheology may be accomplished by varying the surface chemistry of the fine particles using pH, the concentration of dissolved salts or by the type and concentration of flocculant or dispersant.
ABSTRACT A rheological description of mine tailings sheds light on the materials flow be haviour. In the realm of thickened tailings, where fluids adopt solid like behaviours as transi tional materials, rheology plays a crucial role in overland flow and deposit formation.
Evaluation of the rheology of pipehead flocculated tailings PT Slatter and KD Seddon 132 Paste 2015, Cairns, Australia The scope of the test work programme for this investigation was as follows.
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