Bonstrom et al gunnar mine tailings remediation plan water shedding cover system and landform design. The design methodology for pipeline systems conveying thickened and paste tailings systems has been well developed over the last decade. The first section provides the teadet with an overview on tailings and the issues that need to be addressed in all stages of the life cycle of railings. Appendix f1 tailings storage facility design report. Especially where you would have multiple piplines supported on sleepers or piperacks. This means that these slurries will have higher pipeline pressure gradients than conventional tailings slurries and pump station discharge pressures may. Mine paste backfillthe behaviour of thickened tailings and. Mine paste backfillthe behaviour of thickened tailings. Safety guidelines and good practices for tailings management. Request pdf mine paste backfillthe behaviour of thickened tailings and pipeline design tailings slurries are suspensions in water of the finegrained residues of the milling process by. These safety guidelines and good practices for tailings management facilities promote good practices that will help avoid accidents at such facilities and minimize the effects of any accidents that should still occur.
Study of tailings management technologies mend report 2. Elghali et al investigation of the role of hardpans on the geochemical behavior of joutel mine tailings. Wit transactions on information and communication technologies, vol 43. For the sake of simplicity, pipeline designers have tended.
Plot the hydraulic grade line for steady state operating conditions. The pyrite concentrate tailings and the general plant tailings will be combined at the plant and pumped to a nearby tailings storage facility tsf as slurry at a design solids content of 55% by mass. New tailings dams and waste rock dumps will be constructed, to encompass the increased. The tailings storage facility tsf consists of the main tailings storage embankment, diversion ditches, tailing s discharge lines, reclaim barge and pipeline, seepage recovery system srs and.
Results of fullscale pipe test loop pumping tests by c. Select the pipe diameter and trial pipe wall thickness considering deposition and laminar settling criteria cooke, 2006. It outlines the basis of the design and justifies the parameters adopted for the engineering design, construction, operation, rehabilitation and after closure of the tsf. Analyse and assess tailings equipment, resources, development and maintenance requirements, and cost implications. This is a pdf file of an unedited manuscript that has been accepted for publication. Arguably modern slurry pipeline engineering began with the first major long.
Slurrytailings pipeline design pipelines, piping and. This series of papers outlines the process for designing and implementing a typical surface tailings or underground backfill pipeline system. High density slurry and paste tailings, transport systems. The function of the system is defined with a basic description of the process. The format of the design document varies, but will generally include the sections discussed below.
Slurrytailings pipeline design slurrytailings pipeline design porter mechanical op apr 06 12. This type of analysis is not the same as a conventional stress. Vick, john wiley sons external link, new york, 1983, 369 p. The following table summarizes the solids characterization of some of these samples. The detailed design of a tailings delivery system to transport 118 000 td over 12 km in two 600 mm pipelines with two operating pump trains each equipped with four centrifugal pumps in series. The successful design of a thickened or paste tailings system requires that the system is designed to accommodate the effect of the high density slurry on pumps, pipelines and the overall system operation. Hydraulic conveying, as an engineering solution to solids transport, has been. Olympic dam expansion project tailings storage facility design report p 7 of 105 1 introduction 1. Overall, the majority of the fine tailings slurry pipeline will be positioned. Tailings corridor pipeline management plan resolution. Analyse and assess design criteria in line with organisational specific waste management requirements, practices or processes. When considering the design of a tailings storage facility there are many parameters which impact on the optimum site selected and the storage and tailings discharge methods used ritcey 1989. New technologies on mine process tailing disposal 66 the height and diameter of the pumps to be used in the transmission line design. The procedure usually adopted in such cases is to separate the tailing into coarse sand and fines in a classifier, and to use the coarse product to build up the wall.
The project included the front end design of the 12. High density slurry and paste tailings, transport systems saimm. Designing safe and stable tailings dam structures with. By using these guidelines, governments and industry are fostering the protection of the environment and human welfare in our region. Site selection is the most important aspect in affecting the tailings storage facility design. Slurrytailings pipeline design porter mechanical op apr 06 12. Slurrytailings pipeline design pipelines, piping and fluid. Approximately 90,000 t of magnetite will be produced during the design life of the project. Best practices for tailings dam design klohn crippen.
Six pumps in series per pipeline deliver tailings via 450 mm diameter pipelines to the tailings dam. To some degree, the design of the retaining embankment is independent of the type of impoundment layout. Tailings will be produced as three separate tailings streams, pyrite concentrate 7. If sufficient area is available close to the plant, by far the cheapest solution to tailings disposal is to pump the tailings from the thickener underflow to a pond or lagoon, where the solids can, over time, settle out to a dense saturated solid bed and the. The following sections relate to conventional surface tailings storage.
Cooke paterson and cooke consulting engineers pty ltd, south africa 1 introduction the design methodology for pipeline systems conveying thickened and paste tailings systems has been well developed over the last decade. The mica solids throughput is to be substantially increased from 5. Safe tailings dam construction 19 gallivare 20010919 21 version. Backer1 2 3 abstract this report presents the results of tests conducted by the u.
From a design standpoint, it is important to recognize that the density, moisture content, and drainage conditions within the stack are changing as more tailings are placed in the dry stack. The particular design of these retaining structures is unique to a particular environment and mining operation. Hydraulic design issues high pipeline pressure gradients the exponential increase in yield stress and viscosity as solids, concentration increases is a common feature of high density systems. The fine tailings slurry produced by the tailings thickeners will be transferred to the nominated itsf using centrifugal slurry pumps with variable frequency drives through a hdpe pipeline. Pipe length values are determined for the establishment depending on the distance between the tailing area and ore preparation facility. Thickened and paste tailings pipeline systemsdesign procedure, part 2. Tailings slurries are suspensions in water of the finegrained residues of the milling process by which raw materials are extracted from mined rock. Cooke xrepresentative process water should be used for the test work as the water chemistry can have a significant effect on the tailings flow behaviour. The sequence followed for the hydraulic design of a paste or thickened tailings pipeline system is. A conventional impoundment is a surface retaining structure designed to store both tailings and mine water, with the aim of reclaiming the water for use in the processing plant as required. Jan 31, 2018 bonstrom et al gunnar mine tailings remediation plan water shedding cover system and landform design. Pilbara iron ores, as part of the design of tailings pipeline systems. With expertise in complex hydraulics and tailings management, we tailor our solutions. Introduction tsf design justification the tailings storage facility tsf design report presents an analysis of the background conditions and investigations undertaken.
Thickened and paste tailings pipeline system design procedure part 1, page 3. Modified centreline raise of an tailings storage facility jon engels introduction. Challenging economic conditions and increasingly strict environmental regulations demand tailings pipeline systems that travel longer distances, at higher concentrations and with longer design lives. A combination of centrifuge and numerical modelling can form a powerful tool to enhance the design of safer and more economic dams. Conventional tailings facilities involve delivery, often in a pipeline, of unthickened or thickened slurry typically 20% to 40% solids content by weight, and up to 60% from the ore processing facility or. The detailed design and commissioning of a booster pump station to transport 35 000 td of kimberlite tailings to the storage facility. Does anyone have a good reference for the analysis of slurry or tailings pipelines. Tailings dam construction design of slime is likely to slide and cause the dam to break away. Pressure response to valve closure of downhill pipeline. In the transport of concentrate, a typical system will include an agitated storage feed tank, a pumping station, the pipeline and a receiving terminal. Tailing disposal methods and tailings dam construction design. High density slurry pipelines often operate at a higher pressure than conventional tailings, pipelines and pipeline mechanical design must take this into account. The shear strength of dry stack tailings will vary, depending on the moisture content and density of the tailings, and drainage conditions within the stack.
The only considerations are costs associated with starter dyke and subsequent raised construction, the volume of material required to establish a particular height, the tailings properties and the water storage requirements of the facility. Mine tailings design basic requirements obey the laws of physics aka gravity and stability stuff happens earthquakes and other catastrophic events time will take its toll erosion and other long. Proceedings of the tenth international seminar on past and thickened tailings 15. Pumping system design challenges for highdensity iron ore. Conventional impoundment storage the current techniques. The volume of tailings is normally far in excess of the liberated resource, and the tailings often contain potentially hazardous contaminants.
At the lake shore the pipe will wye split into two parallel pipes, one of which. Deposition of these slurries in ponds or lagoons, usually confined by manmade dams, can present serious safety and environmental risks, especially if there is inappropriate handling or management. As a service to our customers we are providing this early version of the manuscript. A framework for a sustainable approach to mine tailings. Various pages within this website present a brief overview of the various surface and offshore tailings storage methods used today. Tailings pipelines for mine waste management ausenco. Before the 1960s, mine tailings were often disposed directly into ponds, lakes, rivers or natural topographic depressions, or stored in impoundments supported by earthen dams, without necessarily applying engineering principles mcleod et al. Analyse and assess design criteria based on the specific legislation required. After settling and selfweight consolidation, the dry density of the undesiccated tailings is a function of the g s of the tailings solids. The coarser tailings may not be suitable for embankment construction and a downstream embankment may be required for these reasons. This paper is the second in a series examining issues related to the design of paste and thickened tailings pipeline systems.
Evaluate how best to include in the tailings guide assessment and selection of both best available. Planning, design, and analysis of tailings dams, by steven g. This tailings corridor pipeline management plan outlines the design considerations and environmental and spill control measures for pipeline construction and operation. An existing 1800m long pipeline which carried waste mica slurry from kaolin processing is to be recommissioned. This section is followed by 21 case studies illustrating the specific components of. Table 2 iron ore tailings solids characterisation sample no.
67 1211 1133 820 333 156 1064 1395 610 144 316 1207 66 906 676 1081 1310 275 1568 31 745 1452 733 1542 1010 1124 37 1470 102 762 1029 1349 454 89 357 681 446 1429 663