gypsum tailing sampling

Due to the similarity with raw materials used in construction and building materials (e.g., bricks, tiles, cement, gypsum, fillers, and aggregates), the most sustainable and environmentally friendly usage of tailings is devoted to this industry. The future trends of mine tailings' recycling and reuse should relate to technological innovation ...

The SEM results of sample 7 on day 28 and day 90 are shown in Figure 5 a–d, respectively. As ... and the slurry concentration was 70%. Various properties of the paste were affected by the binders/tailing mass ratios, the FGD gypsum/FGD ash ratio and the steel slag/FGD by-product ratio. The levels of each factor are shown in Table 6. Table 6.

The increased expansion was due to the higher water permeability of mortar with tailings and the formation of gypsum and expansive ettringite in mortar specimens compared to ... J.C. Lee, M. Jahani, Leaching of zinc from a leadzinc flotation tailing sample using ferric sulphate and sulfuric acid media, Journal of Environmental Chemical ...

Oil sands surface mining in Alberta has generated over a billion cubic metres of waste, known as tailings, consisting of sands, silts, clays, and process-affected water that contains toxic organic compounds and chemical constituents. All of these tailings will eventually be reclaimed and integrated into one of two types of mine closure landforms: …

Yunyun Li et al. [22] explored the hydration and hardening characteristics of a ternary system of steel slag tailing slime, slag, and desulfurization gypsum. It was found that the comprehensive strength after 1 and 3 d could reach 8.62 and 19.65 MPa, respectively, when the steel slag tailing: slag: desulfurization gypsum ratio was 40:40:20.

Tailing, in context to mining, is defined as the waste or non-economic by-product generated during mining activities, processing of minerals, and other materials that contain small amounts of residual valuable minerals, chemicals, water, and heavy metals (Adiansyah et al. 2015).Studies indicated that the process of mineral exploitation and …

Sep 14, 2016. Geotechnical Properties of Mine Tailings. Authors: Hu, Ph.D., A.M.ASCE., Hui Wu., Lin Zhang., Pengwei Zhang., and Qingbo Wen. Author …

mine tailing sampling was carried out. The HM concentration was determined by atomic absorption spectrophotometry; spatial analysis and the size of the contaminated areas were calculated using

Sampling tailings with carefully placed drill holes from deposit surface is therefore best. Collecting cores, as preserved as possible, is preferable to other approaches, as vertical variations can be sharp, reflecting past mining or processing decisions. Sonic sampling is probably the most efficient answer to the challenge of investigating a ...

The tailings are characterized for the geotechnical, physical, chemical and mineralogical properties first, and then electrokinetic cell tests are carried out to …

This study was designed to investigate the hardened performance of the paste specimens produced using a composite binder with high volumes of mine tailings incorporating various by-products. Mine tailing and fly ash (FA) content was tested at 40%, 50%, and 60% of total paste volume, and tailing pastes were produced at w/b ratios of …

The aim of this study was to develop sustainable concrete by recycling concrete aggregates from steel waste and construction waste (iron ore tailings (IOTs) and recycled coarse aggregates (RCAs)) to replace silica sand and natural coarse aggregates. In experimental testing, the compressive strength, peak strain, elastic modulus, energy …

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Mechanical grinding process facilitates the simultaneous immobilization of CaSO 4 and BaCO 3, providing a green method to treat barium- and gypsum-containing …

Steel slag, desulphurised ash, desulphurised gypsum and ultra-fine iron tailing sand are common industrial solid wastes with low utilisation rates. Herein, industrial solid wastes (steel slag, desulphurised gypsum and desulphurised ash) were used as the main raw materials to prepare a gelling material and ultra-fine tailing was used as an aggregate to …

Depending on the type of deposit, the sampling techniques included percussion, direct push and diamond drilling methods, up to a maximum of 20 m depth, totalizing 1342 m of samples.

A topsoil sample (approximately 10 kg) was taken at a depth of 0–20 cm from a paddy field. The soil sample was air-dried and passed through a 2 mm Nylon sieve. The water contents of the mine tailing and paddy soil samples were determined gravimetrically after oven heating at 105 °C for 24 h.

No warranty. Determine the extent of a flow slide of liquefied mill tailings. Select unit first, then enter the parameters and click the "Calculate" button below. HELP. Units: Imperial Metric. ------- Select Sample Data ------- Tailings (H=50m) Tailings (H=50m, 1%V:H) Gypsum tailings, East Texas 1966 (H=11 m) Aberfan coal tip, Wales 1966 (H=37 ...

Published: 16 March 2023. Geochemistry and mineralogy of auriferous tailings deposits and their potential for reuse in Nova Lima Region, Brazil. Mariana Lemos, Teresa …

To explore the correlation between early strength and pore structure of cemented tailing backfill sample, cemented tailing backfill (CTB) with different binders and sulphate concentrations were made and uniaxial compressive strength (UCS) tests, mercury instrusion porosimetry (MIP) tests were performed on all samples at curing time of 28 …

Before centrifugation, the material was mixed with 1.1 g/L of A3338 polymer and 1.1 g/L of gypsum, ... Initially, sampling was conducted by pulling water from the taps utilizing a plastic syringe. ... The initial tailings cake had a total organic carbon content of 12.7% and final tailing cake had an average total organic carbon content of 12.5%

Sampling and sample preparation. The tailing samples (labeled as MT-1, MT-2, MT-3, and MT-4) were collected from the impoundments in the Yaoposhan mining area, which has decades of opencast mining for lead-zinc ores and limonite. ... MT-1 (un-weathered) was mainly composed of calcite, fluorite, gypsum, riebeckite, and annite, …

14 towards zero harm – a compendium of papers prepared for the global tailings review towards zero harm – a compendium of papers prepared for the global tailings review 15

A site-specific sampling strategy and technique was identified, and based on the observed lithology, tailings particles were studied to understand their …

The future sustainable built environment focuses mainly on environmental conservation and technological innovation and development. However, with infrastructure development, the consumption of raw materials such as cement, gypsum, sand, and stones increases. Therefore, use of industrial waste as raw material in construction shall …

e sample for this test is a phosphate tailing; the chemical. ... namely nitrate sulfur gypsum (NG), phosphogypsum (PG), desulfurization gypsum (FGD), polyaluminium chloride (PAC), hydroxyapatite ...

This tailing storage facility was partially saturated and required a dewatering process to allow remining. The authors describe the conducted activities for this dewatering, including basic engineering studies focused on hydrogeological characterization of the tailings, recommended tests and modelling to define a detailed engineering design ...

The chemical composition of the uranium mill tailing sample was made clear by X-ray fluorescence analysis (Table 3), The principal chemical components were SiO 2, Al 2 O 3, SO 3, CaO, Na 2 O, Fe 2 O 3 and MgO, corresponding to the albite, gypsum, quartz and clinochlore minerals in the X-ray diffraction. A small amount of uranium was identified.

Utilization of the discarded tailings by treating with sulphuric acid, available as by-product of zinc-lead smelters of the region, to produce epsom (MgSO .7H O) and gypsum (CaSO .2H O) along with ...

The recycled gypsum was milled and sieved through #20 U.S sieve and heated for at least 2 hours in oven at temperature of 140 o C. Figure 1 shows the recycled gypsum and the final product.

Samples of mine tailings deposited at the Doce River estuary were stored at approximately 4 °C in a laboratory to prevent chemical and biological alterations . During the sampling procedure, …

Intact sampling is often difficult and thus piezocone penetration test (CPTu) and flat dilatometer test (DMT) are often used for mechanical characterisation of sludge. In …

According to the results of TG analysis of jarosite tailing waste, sample 1 taken at depth of only 0.2 m contains lower level of jarosite when compared to samples 2 and 3, similar to the results of XRD analysis (relative height of peaks of jarosite vs. franklinite). ... First stage of gypsum decomposition occurs at about 150 °C, where …

World Bank, Washington, DC. Any queries on rights and licenses, including subsidiary rights, should be addressed to World Bank Publications, The World Bank Group, 1818 H Street NW, Washington, DC 20433, USA; fax: 202-522-2625; e-mail: pubrights. @ worldbank. Cover photo: Tailings Storage Facilities at Waihi Gold Project, New …

After adding 8% gypsum and tin tailing's variation of 20%, 30%, ... value is 24.20 kPa from 15 % mix of gypsum plafond waste (WPG15) sample. For the maximum value internal friction angle (ϕ) is ...

Typical fine tailings sample: ... mica, muscovite, gypsum, and dolomite, with residual amounts of copper and other metals: pH 9.2–10.2 for alkaline flotation of sulfide ores; neutral pH reported for porphyry deposit tailings; limited water salinity data ... results from Shell's Tailing Testing Facility appear promising after 5 ...

Tailings management regulations (e.g., Directives 074 and 085) were put into place as a response to increasing concerns over the risks and uncertainties associated with tailings ponds management and increases in oil sands tailings inventory (Alberta Energy Regulator, 2009, 2017).Since then, oil sands operators have attempted to reduce …