looseness coefficient of tailings sand

THE COMPOSITION AND STATE OF GOLD TAILINGS

2017-3-13 · Tailings sands are shown to be almost pure silica quartz with approximately 10% illite. Tailings slimes, on the other hand, contain considerable amounts of clay minerals (20% muscovite, 15% illite and 20% pyrophyllite, kaolin and clinochlore) and traces of pyrite and other sulphides in addition to the quartz. Tailings, consequently, have a ...

Geotechnical Properties of Mine Tailings

2017-1-13 · Compared to the copper tailings, the iron tailings showed higher compressibility, lower permeability, lower strength, and lower cyclic resistance. With the decrease in void ratio, the coefficient of consolidation almost kept constant for the fine iron tailings, whereas for the fine copper tailings, the coefficient of consolidation gradually ...

Appendix P – Revised Tailings Consolidation Report

2018-8-7 · Addendum to GHD Report - Tailings Deposition Open Pit Consolidation Modelling and Deposition Concept – Sensitivity Analysis 1 Introduction McArthur River Mining (MRM) engaged GHD to conduct a sensitivity assessment of the tailings ... Coefficient of consolidation at the low range of the vertical effective stress up to 1.7 kPa:

(PDF) Permeability function for oil sands tailings

2017-7-5 · Laboratory data on thickened oil sands tailings are presented and interpreted within the context of the proposed methodology. Fredlund and Xing (1994) SWCC fit to experimental data for Columbia ...

Finding alternative sources of sand – mine tailings

2022-3-17 · Figure 1. Tailings generation by mined commodities versus demand for natural sand by applications. Note: authors estimate. Figure 2. Examples of tailings and recovered sand by-products. Project Outcomes Alternative Sand From Mineral Ores - Interim Report (6 Months) News update: New step in mineral processing could help prevent sand ...

A review of properties and treatment of oil sands tailings

1992-1-1 · @misc{etde_6164282, title = {A review of properties and treatment of oil sands tailings} author = {Kasperski, K L} abstractNote = {The hot water process used to extract bitumen from the oil sands in northern Alberta produce an alkaline tailings stream containing sand, clays, residual bitumen, and small amounts of soluble organic compounds. The suspension formed …

Settling, consolidation and shear strength behaviour of …

2020-11-1 · Abstract. The volume change and shear strength behaviour of tailings slurry with the changes in gravimetric moisture content is important to effectively utilise the storage volume and analysis of dam failure potential. Consolidation testing of tailings from a slurry-like to soil-like state is a critical task, and conventional consolidation ...

Study on Preparation and Shielding Effect of Lead-Zinc …

The mass attenuation coefficient in the energy range of 1keV-100GeV is calculated by XCOM theory. The test results show that with the increase of tailings sand content, the mass attenuation coefficient of mortar increases gradually, and the shielding performance is better. The simulated value and experimental value have Good consistency; the ...

Mechanical characteristics of mine tailings and …

2016-1-29 · These tailings are classified as nonplastic silt and sand. Specimens of the tailings were prepared as slurries, consolidated to vertical effective stresses of 100–400 kPa, and subjected to ...

(PDF) Geochemical Stability of Oil Sands Tailings in Mine …

2021-7-30 · As such, the geochemical stability of tailings landforms remains largely unknown. This review discusses five mechanisms of geochemical change expected in …

On the mechanical damage to tailings sands subjected to …

2018-11-24 · The safety of tailings ponds is considered to be one of the greatest environmental challenges in the field of energy and mining engineering. Impacted by factors such as rainfall infiltration, recycling water, dry beach face evaporation, tailings sands close to the saturation line in tailings ponds are subject to frequent dry–wet (DW) cycles. DW cycles aggravate the …

Cycloning of tailing for the production of sand as TSF …

This paper outlines the available choices and design considerations involved for the minimization of sand production costs by cyclone, looking among others at parameters such as sand yield, water recovery, and consistency of sand quality. A number of changes in drivers to the disposal of tailings make this a relevant subject.

Experimental study to improve the mechanical properties …

2021-3-1 · The iron tailings sand used in this study was taken from the tailing pond of Fujian Makeng Mining Co., Ltd., located in Chenkeng Valley, Qilai Village, Caoxi Street, Longyan, Fujian, China.According to the Specification of Soil Test (SL237—1999), we determined the basic physical characteristics of the iron tailings sand by tests, such as the particle size distribution, …

COMPARATIVE STABILITY ANALYSIS OF TAILINGS …

2016-1-10 · Tailings Storage Facilities (TSFs) are vast structures that respond to site-specific characteristics, rate of production, placement techniques, and the physical and mechanical properties of tailings. ... analysis is conducted assuming a horizontal seismic coefficient 0.05 and a return period of 2% based on Earthquakes Canada (2010). The ...

Ageing deformation of tailings dams in seasonally frozen …

2019-10-21 · The slope of a tailings dam in a seasonally frozen soil area is affected by natural freezing and thawing, which damages the structure of the tailings sand and decays the mechanical properties 1,2 ...

Anisotropic shear strength characteristics of a tailings sand

2013-11-17 · The tailings sand was taken from the deposited beach of a tailings dam, which is subordinated to an iron mine. This soil consists of 78.4 % sand, 17.6 % silt and 4 % clay with its particle size distribution curve shown in Fig. 2 s physical properties are summarized in Table 1.The soil is classified as a silty sand according to the Code for Investigation of Geotechnical …

9.3 Tailings Storage Facilities and Waste Rock Stockpiles

2022-1-12 · Figure 22 – Example of an isolation cover placed on a re-contoured waste rock pile. A number of factors are considered when evaluating the potential benefits of cover placement on mine wastes. A soil cover can be designed to enhance storm runoff in comparison to that occurring on the tailings surface or waste rock stockpile if it were left uncovered.

Tailings Ponds 101 | Oil Sands Magazine

2016-2-25 · These tailings ponds need to be massive structures, since they must provide sufficient residence time for water recovery and adequate holding capacity for all the solids contained in the mined ore. TAILINGS PONDS 101. Tailings ponds (or tailings storage facilities) play a critical role in storing solids from mined oil sands and managing water ...

THE MOBILITY OF PETROLEUM HYDROCARBONS IN …

2016-5-10 · Tailings Sand 0.130 0.045 204000 35.8 398 519 The desorption coefficients resulting from this study are similar to those reported for the desorption of asphaltene, which is one of the components in oil sands tailings. The Langmuir isotherm model was found to be the best fit for the experimental desorption data; the Langmuir

[PDF] Cycloning of Tailing for the Production of Sand as …

2011-11-2 · Hydro-cycloning of plant tailings is an often used tool to produce relatively coarse free draining san d (cyclone underflow) for Tailing Storage Facility (TSF) emban kment construction. This paper outlines the availab le choices and design considerations involved for the minimization of sand production costs by cyclone, l ooking among others at parameters such as sand yield, …

Cycloning of Tailing for the Production of Sand as TSF …

2014-12-5 · the original tailing stream, much of the sand yield is also determined in how the cyclones are set up and operated. Figure 8 shows how a coarse grained tailings stream in a single efficient cyclone stage can indeed meet both design constraints, and in this case, a sand quality of 12.5%m and a sand yield of 40%m. The

High sand tailings dams: main challenges

2016-12-13 · compressibility of tailings sands samples S1 to S5 with uniformity coefficient C u (d 60 /d 10) between 1.0 and 3.2, of natural Ottawa quartz sands samples (Murthy et al., 2007), of rounded particles and with C u between 1.5 and 2.7, and of Hostun sand (Colliat-D''Angus, 1986), of angular particles and with C u of 1.7.

Missouri University of Science and Technology Scholars'' …

2021-4-12 · produced by cycloning the total waste tailings. The cycloned sand thus produced is a very cheap construction material that utilizes up to 50% of the total tailings as dam bu.ild ing material. A commonly used method of downstream, sand tailings dam construction (centreline method} is illustrated in Figure 3.

Influence of rock percentage on strength and permeability …

2020-7-18 · The permeability coefficient was 5 × 10 −3 cm/s for the 1.5:1 mixture ratios of waste rock to tailings (Williams and Kuganathan 1992). The main focus of the mixed co-disposal technology for tailings and waste rock is to reduce the number of tailing dams because tailings have poor mechanical performance.

Process and equipment for making sand with tailings | LZZG

2022-6-20 · Tailings crushing sand making process. First, the waste rock chips are sieved, and the particles larger than 5mm (accurately speaking, the upper part of the sieve with a sieve hole length of 4.75mm square hole sieve) are crushed by a vertical shaft impact crusher, which also has a shaping effect and breaks. After the machine is air-separated ...

Influences of Tailings Particle Size on Overtopping Tailings …

2020-10-14 · A series of physical tests were carried out using three different particle sizes to investigate the influence of tailings size on the failure process of a tailings dam subjected to overtopping. In addition, the overtopping failure process was simulated with a computational fluid mechanics model. The tests results showed that with increased tailings size, the mode of …

CHAPTER VIII CLOSURE AND RECLAMATION

2020-9-8 · Sand dams, comprised of fine sand and silt tailings, are highly erodible. Even when capped and revegetated, gullies can penetrate the cover, leading to erosion of mine waste, fan deposition, and elevated suspended sediments in downstream watercourses, necessitating ongoing maintenance. Tailings and the tailings pore-water (the water that

MANAGEMENT OF TAILINGS: PAST, PRESENT AND FUTURE

2020-9-8 · which vary and are difficult to change. Sand facilities, cycloned and/or compacted, are widely employed in South America and Canada, now usually raised by the centreline or downstream methods. Rockfill and/or roller compacted concrete facilities are finding favour for high tailings facilities in the deep valleys of the Andes in South America.

Study on static and dynamic strength characteristics of …

2012-4-1 · The laboratory investigation and field observation results show that the liquefaction resistance and strength characteristics of soil have great influenced with the grain gradation (Zhang et al., 2003) g. 2 is the typical particle gradation curve of the tailings silty sand. Table 1 presents the physical and mechanical parameters of the tailings silty sand.

Utilization of Iron Tailings Sand as an Environmentally …

2020-12-9 · Due to the significantly different properties of iron tailings sand compared with natural river sand-such as the higher density, higher content of limestone particles smaller than 75 μm and its rough and angular shape-concretes prepared with iron tailings sand show remarkably higher shrinkage. This study presents the shrinkage characterization ...

Tailings Co-disposal of Tailings

2021-1-4 · Co-disposal is the mixing of fine and coarse mine waste to produce a single waste stream (Martin, Davies et al. 2002). Mixing the fine and coarse waste reduces the empty void space primarily associated with coarse waste streams …

(PDF) Shear Strength and Deformation Modulus of Tailing …

This article discusses the results obtained for 4 different tailing sands from copper mines located in Chile and Peru, which were subjected to triaxial tests performed in drained and undrained conditions (CID and CIU), applying confining pressures up

Related Posts