Experimental Study on the Fine Iron Ore Tailing Containing Gypsum …
Experimental Study on the Fine Iron Ore Tailing Containing Gypsum as Backfill Material Daiqiang Deng, Guodong Cao, Youxuan Zhang; Affiliations Daiqiang Deng College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China Guodong Cao College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan 411105, …
Current state of fine mineral tailings treatment: A critical …
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 ...
Apa Itu Tailing? Mengenal Tailing dan Metode …
Dalam dunia pertambangan, tailing merupakan salah satu istilah yang sering mengundang tanda tanya. Terkadang, pengertian tailing sering disalahartikan sebagai suatu zat yang berbahaya. Padahal, tidak demikian. Mengutip Wikipedia, Tailing didefinsikan sebagai "Bahan yang tertinggal setelah pemisahan fraksi bernilai bijih besi. …
Leaching of heavy metals from abandoned mine tailings …
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.
Utilization of tailings in cement and concrete: A review
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 ...
Gypsum Amendment Induced Rapid Pyritization in …
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, …
Utilization of high-volume mine tailing and by-products in
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 …
ERT-assisted assessment of geochemical characteristics of
The existing minerals include gypsum (CaSO 4 ·H 2 O), quartz (SiO 2), ... Chemical fraction distribution (a), leaching toxicity and risk assessment (b) of HMs in representative composite tailing sample. The filled areas of different colors represent different risks of RAC, and the red data in TCLP represents that the leaching content of …
The remediation of abandoned mine tailing dumps using a …
Sampling campaign was done, related to soils and plant materials (roots, barks, wood, and needles), aimed at evaluating the main mineralogical characteristics, metal content, plant accumulation ...
Tailing Material | Sampling Systems | Mining
Tailings. Sampling. In addition to traditional geotechnical samplers, ConeTec has designed several specialty sampling systems specific to mine tailings applications. These samplers are designed to collect representative samples in tailings materials ranging from process water, to fluid slimes, to liquefiable sandy silt, to dense beach and dyke ...
Investigation of thermal decomposition of jarosite tailing …
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 …
(PDF) Heavy metals contamination in soils around tailing …
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
Potential risk, leaching behavior and mechanism of
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, …
The Mechanical Properties and Microstructure of Tailing …
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 …
Introduction to this Special Issue on Tailings Storage
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 ...
Geotechnical Properties of Mine Tailings | Journal of …
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 …
Sampling Methods | Types, Techniques
2. Systematic sampling. Systematic sampling is similar to simple random sampling, but it is usually slightly easier to conduct. Every member of the population is listed with a number, but instead of …
Minerals | Free Full-Text | Geochemical Stability of Oil Sands …
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: …
Effect of gypsum on the properties of composite binder containing high
The effect of gypsum on the properties of composite binder containing high-volume slag and iron tailing powder was studied by measuring compressive strength, hydration heat, bound water content, hydration products, pore structure and morphology.The addition of gypsum increases early-age compressive strength and …
Correlation between early strength and pore structure …
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 …
Mine Tailings Sampling Technique
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 ...
ELECTROKINETIC DEWATERING OF GYPSUM …
The tailings are characterized for the geotechnical, physical, chemical and mineralogical properties first, and then electrokinetic cell tests are carried out to …
Effect of gypsum on the properties of composite binder
The effect of gypsum on the properties of composite binder containing high-volume slag and iron tailing powder was studied by measuring compressive strength, hydration heat, bound water content ...
Efficient stabilization of barium- and gypsum-bearing …
Mechanical grinding process facilitates the simultaneous immobilization of CaSO 4 and BaCO 3, providing a green method to treat barium- and gypsum-containing …
Release behavior of uranium in uranium mill tailings under
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.
(PDF) Mineralogical Characteristics of Phosphate Tailings …
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 ...
(PDF) Production of epsom, gypsum and other industrial …
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 ...
Gels | Free Full-Text | The Preparation Process and Hydration …
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 …
Preparation of mine backfilling from steel slag-based non …
The hydration products formed in the G3 sample greatly improved its strength. ... 35% steel slag and 15% desulfurisation gypsum, a binder to tailing ratio of 1:4, and a slurry concentration of 78% resulted in strength values of 6.69 MPa, 12.05 MPa, 16.36 MPa and 18.37 MPa after 3, 7, 28 and 180 days, respectively. Ettringite formed …
Technical Note on Tailings Storage Facilities
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 …