The present study was conducted to assess the presence of cyanide species in drainage water from an active slimes dam that receives effluent from a gold reprocessing plant in the Central Rand ...
The chapter deals with gold and sulfur recovery. The reclamation methods and general processing techniques would, however, be applicable to the recovery of other minerals, although the specific flowsheets would obviously differ. Gold-mining residues fall into one of the three categories comprising slime (particle size of about 75% passing 74 …
Tailings or slimes dams, consisting of pulverized high pyrite rock waste from the mining of gold and uranium, are a significant environmental hazard in South Africa ( Van As et al., 1992 ).
The aim of this study was to undertake a broad-scale survey of the plant species composition on gold and uranium slimes dams, and slimes-polluted soils, in the deep-level mining regions of South ...
The objective of this Slimes Management Guideline is to assist CMPA members in ensuring that all health, safety and environmental risks associated with the generation and controls of slimes and the operation and rehabilitation of a slimes dam are reduced so far as is reasonably practicable. This Guideline: Provides contemporary …
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Semantic Scholar extracted view of "Slimes dam stabilisation and rehabitation as practised at Mhangura Mine" by W. P. Northard et al.
This chapter sets the recent scene. Two catastrophic tailings dams failures (Mount Polley and Samarco) are reviewed based on Independent Review Panel and other post-mortem analyses.
This paper describes the test work, process design of a processing system at the Mazowe Mine that will improve the extraction efficiency from gold tailings material. The recovery is derived from the separation of the gold contained within the sulphides of the tailings material and a dedicated process stream to recover that gold.
Water-dam construction is very costly and does not permit the free drainage of slimes for ultimate disposition. The design of these dams, which is well covered in the literature, corresponds to the purpose it is to serve and to the terrain and climatic conditions of the geographic area.
Tailings dams are used to store water and waste that come as by products from the mining process. It is estimated there are at least 3,500 tailings dams around the world. But as there are around 30,000 industrial mines, the number of tailings dams is likely to be much higher. Tailings dams can be huge in size, as big as lakes, and reach 300 ...
Winde F (2001b): Slimes dams as source of uranium contamination of streams - the Koekemoer Spruit (Klerksdorp gold field) as a case study. Chamber of Mines of South Africa (ed.): Conf. on Environ.
The design and construction of tailings dams, as well as the effect of drain gravels and filter materials on the geotechnical behaviour of the tailings sands, are also discussed.
Slimes and ultra-fines present a challenge to metallurgists and tailings engineers. Many have spent years thinking about alternative ways to store, process or dry this troublesome mining waste stream. The characteristic of many slimes streams can make tailings management, slurry storage and filtration very tricky.
Flooding caused by the collapse of a mine dam wall in South Africa's Free State province swept away houses and cars on Sunday, the provincial government said, killing one person and injuring ...
Uranium contamination of streams by tailings deposits -case studies in the Witwatersrand gold mining area (South Africa)
Regular dam cleaning will prevent critical system failures. A typical mine water reticulation system consists of clarification (or settling), pumps, pipes and dams. The bulk of the solids suspended (99%) in mine service water is removed in the underground clarifier. The settled mud is removed from the circuit and managed via the mud handling ...
Slimes disposalatSouthAfrican goldmines. Webofcompleted slimes dams (seeFigs. 4and5). Animportant assumption made in arriving at the general assessment that gold-mine slimes dams are structurally stable isthat the shear strength of the material of the walls,ifnotofthebulkofthedams, isinfact that ofdry consolidated slimes.
The study contributed to the importance of, and methods used for, assessing ecosystem function on rehabilitated slimes dams in Zimbabwe, which are often ignored as most efforts focus on the ...
The mining reserves comprised mainly the Stilfontein No 2 slimes dam and, secondly, remnants from the No. 3 slimes dam footprint immediately to the north of No 2 Dam, Dam No 1 footprint and a fairly extensive low-lying spills area to the east of No 2 Dam.
Jwaneng Mine requested Geoflux to carry out a detailed survey and design for the construction of raising of walls to Dam 7 using waste rock. The walls were to be raised by 4 metres from the existing level to increase the impoundment capacity for the slimes.
Slimes Dam Building: This is a variant of the dewatering cyclone, where the underflow is used to build the tailings dam wall. Again, the cyclone underflow is the required product, and the client usually wants the maximum tonnage split to the underflow.
In this paper the contribution of seepage from slimes dams to the uranium pollution of adjacent streams is analysed.
The design, construction, and operation of tailings dams in the gold-mining industry has become of increasing importance in view of the enormous tonnages requiring de-position. The annual tonnage cur-rently being deposited as a result of operations by the Anglo American group of gold mines is calculated at between 25 and 26 million, and the total …
This study assessed the effects of mining activities at Bulyanhulu Gold Mine (BGM) on the water quality of Bulyanhulu River in Tanzania. Potential pollutants were identified, quantified and their spatial distribution determined along different sampling points upstream and downstream the mine.
Since the overflow tailings are finer than typical gold slime and of a higher moisture content, it was considered necessary to investigate the influence of those differences on the operation and stability of slimes dams built from cyclone overflow.
A pump station for hydraulic mining of the slimes tailings dam also part of the plant.Key features of the Mazowe sands Plant are described and include:• Hydraulic mining of gold tailings dump.•. Feed preparation section that includes a (W x L) 2.4 m wide x 4.8 m trash screen, 250 m3 surge tank, a cluster cyclones with 2 x 500 mm diam ...
The art of slimes-dam construction grew with the gold-mining industry in South Africa as a result of ex-perience with successful dams and with failures. (The failures are more important when it comes to learning about the properties of materials and the mechanisms by which fail-ures occur.) Slimes-dam construction developed in this way for fifty years, …
Following the much-publicised 2019 Brumadinho tailings dam disaster in Brazil, where a tailings facility collapsed releasing 11.7 million cubic metres of toxic mud and killing more than 200 people according to BBC reports; the management of tailings storage facilities, ("TSFs") has come under increasing international scrutiny.
Current practices generally in accordance with the principles of design and operation of slimes dams within the Gold Mining Division of the Anglo American Corporation are descriptionbed. Although many of the details given are either obvious or have been amply dealt with elsewhere, these have been included for the sake of completeness.
The environmental impact of seepage from gold mine tailings dams near Johannesburg, South Africa Submitted inpartialfulfilment oftherequirements
How a Thickener Works. Thickening or dewatering may be defined as the removal of a portion of the liquid from a pulp or slime made up of a mixture of finely divided solids and liquids. The early methods of thickening employed plain, flat-bottomed tanks into which the pulp was fed until the tank was full. The solids were then allowed to settle ...
For the purpose of this paper, gold mining residues with a particle size of approximately 70–80% finer than 74 μm are defined as slime and residues grading 10–20% finer than 74 μm as sand. The first phase of the re-treatment process is to obtain credible information with the sampling programme (and the subsequent metallurgical testwork) a ...
In summary, gold plant residues, either current or reclaimed from slimes dams, are treated in three flotation plants at Free State Geduld Mines Limited, President Brand Gold Mining Company Limited and President Steyn Gold Mining Company Limited (Figure 12.9).
Gold and uranium tailings ('slimes') dams and the adjacent polluted soils in the deep-level mining regions of South Africa (Carletonville, Klerksdorp and Welkom) were surveyed for the frequency of ...
The Merriespruit slimes dam failure occurred in February 1994 when 600 000 mlsupg3l/supg of liquid slime rushed through the Merriespruit village, causing the death of 17 people, widespread devastation and environmental damage. This paper sketches the early history of the dam and gives a brief description of dam-building techniques used on …
This is a legal paper on the ownership of slimes dams. It follows a two-part presentation on a closely related topic in the previous July issue, 'The socio-economic aspects of mine closure and sustainable development', by J. Stacey et al. The paper impressed me by its complexity and scope. The authors attempted to analyse and provide a code ...
Research on theAcid mme drainage (AMD) is recognised as a global po. lution problem. The uncontrolled release of acid mine drainage as a result of poor management of tailings dams (or slimes dams), sand and waste rock dumps, is the single most important impact mining has on the environment (Ferguson &.
Ballarat Gold Mine is required to follow the Earth Resources Regulation (ERR) Guideline for the Design and Management of Tailings Storage Facilities to ensure that the management of its Tailings Storage …
