The pyrite sample was collected from a flotation unit of copper cleaner tailings. The synthetic gypsum was prepared from the reaction of slaked lime with sulfuric acid. ... The FeS 2 content in the provided pyrite tailing concentrate is approximately 87 wt.% and its average particle size is 39 μm. ... Gypsum conversion and formation of lime as ...
revealed elevated porewater salt concentrations in gypsum-amended tailings, which could pose challenges for long-term reclamation of the oil sands tailings.
Gypsum tailings, slag, cement and other additives are used to produce gypsum building material products with simple technological processes and low costs. It provides a new effective approach to ...
The compressive strength of the 28-day sample reached 1.24 MPa, meeting the mine-filling requirements, while that of the 90-day sample was 3.16 MPa. ... 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 ...
CN1792973A CNA2005101205137A CN200510120513A CN1792973A CN 1792973 A CN1792973 A CN 1792973A CN A2005101205137 A CNA2005101205137 A CN A2005101205137A CN 200510120513 A CN200510120513 A CN 200510120513A CN 1792973 A CN1792973 A CN 1792973A Authority CN China Prior art keywords gypsum powder mine …
W in secondary gypsum and hydrous ferric oxides (HFO) on the shore of Smaltjärnen skarn tailings, Sweden, was studied with sequential extraction, low-vacuum SEM-EDS and DXRD (Dierential X-ray Diff raction). The results showed that W was hosted to ff ... The tailing sample (S1) was crushed and homogenized with a mortar. One gram of the sample ...
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 bound water content, but the opposite …
The effects of curing time, binder-tailing ratio by mass (b/t), and slurry concentration on compression strength were investigated. The sample made from Huazhong binder and iron ore tailing presented the largest compression strength.
The maximum potential acidity (MPA, kg/ton) of the tailing was calculated with the C tot-sulfur, and the inherent buffering capacity was determined using the acid-neutralization capacity (ANC, kg/ton) method of Lawrence et al. (2010), where the tailing sample was reacted with a known excess of HCl, then back titrated with NaOH to quantify the ...
Managing tailings right is key to keeping mining operations safe, efficient, and sustainable. Let's break down why sampling procedures and materials characterization techniques are so important in this process.
In addition, several samples were taken from the same tailing dam to obtain a composite and representative sample of the tailing material, according to the methodology proposed by Smith ... associated with sulfides, mainly pyrite, chalcopyrite, sphalerite, and arsenopyrite. Jarosite (KFe 3+ 3 (SO 4) 2 (OH) 6), gypsum (CaSO 4 ·2H 2 O ...
Each tailing and rock sample, amounting to approximately 300 g, underwent a 5-day drying process in a 40 °C oven. ... (0 to 8.4 wt%). Pyrite and molybdenite are the dominant sulfides, while gypsum is the primary sulfate salt, comprising less than 4 wt%. Ankerite (carbonate mineral) and magnetite (Fe-oxides) were measured in only one sample ...
Membagikan "Analisis perbandingan penggunaan limbah gypsum dan tailing timah sebagai bahan stabilisasi tanah lempung" COPY N/A N/A Protected. Tahun akademik: 2021 Info ...
The tailings consist of mineral gypsum (CaSO 4 x2H 2 O) that precipitated from the water solution of waste sulphuric acid neutralisation by using the lime and fine-grained …
STEMart provides comprehensive waste gypsum testing services to ensure that the waste gypsum meets the required standards and that it is safe and effective for reuse. Test Samples Gypsum tailing Anhydride Chemical gypsum: phosphogypsum, fluorogypsum, boron gypsum and desulfurized gypsum Standard Tests Identification and Testing
Every tailing sample from every drill core was analyzed by using the five-step sequential extraction method for water-soluble adsorbed exchangeable carbonate (AEC), Fe (oxy)hydroxides, Fe oxides and sulfides. …
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Iron tailing slag could be used for roadbed filling and improving ... gypsum, etc. in road engineering construction. The dosage of slag was as low as 40 %. Moreover, the use of iron tailing slag as a raw material for road construction sub-base required a series of ... is the picture of a slag sample magnified 50 times using an electron ...
The sampling campaign collected samples from eight tailing dams; seven were identified as abandoned and inactive and one as active—a community tailing dam receiving waste from different mineral recovery …
The results indicate that the gold, silver content of the sample are 0.495 g/t and 1.70 g/t, respectively, and SiO 2, and Al 2 O 3 account for 62.21 % and 13.54 % of the sample content, respectively. Lin et al. (2023) analyzed gold tailings obtained from the Wa State Gold Mine Group (Myanmar) using atomic absorption spectrometry (AAS) and XRF ...
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 ...
The specific sampling process at the site was as follows: (1) tailing slurry was collected using a filter cloth made into a container, and then lowconcentration tailing slurry was poured into it ...
In this paper, the rheological test was conducted to determine the slurry concentration of iron ore tailing containing gypsum. Then, the samples made from slurry and …
The original gypsum tailing area was located south of the fertilizer plant and adjacent to the St. Mary's River. By 1965 the original disposal area had proven inadequate and Cominco's engineering staff had selected a 500 acre disposal site to the east of the plant. In 1950 the phosphate fertilizer market warranted the design and construction of ...
A continuous sampling system for high-concentration tailing pulp is suitable for metallurgy and mine tailing pulp sampling with high concentration, long distance, small flow and high lift. The continuous tailing pulp sampling system solves the problem that a pipeline is easy to block in the long-distance conveying process of high-concentration pulp, also solves the requirement of an …
The invention relates to a plaster building brick produced by discarded plaster gangue as well as its preparing method. The plaster gangue wall brick has the character: its components (wt%): plaster gangue 57-84, inorganic filling 15-40, reinforcing material 0.2-3, and water, where the water is 45-70% of total weight of mixed material of plaster gangue brick; the plaster gangue is …
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.
The effect of curing time on UCS of the sample with 66% tailing concentration is shown in Figure 5. Although the UCS of all samples of three binders increases with curing time, the increase rate is different. ... Hence, for iron tailing with gypsum of high content, the HZ is a more suitable binder. Conflicts of Interest. The authors declare ...
Sample digestion experiments were performed to optimize the method for microwave digestion allowing the determination of uranium and thorium by ICP-MS and alpha spectrometry, respectively. Sample digestion experiments were made using two ore samples and one mill tailing sample from each site.
Mine tailing deposits may result in environmental issues when abandoned and exposed to environmental conditions. This case study focuses on the "El Lavadero" tailing deposit, an abandoned mining environmental liability located in San Felipe de Jesús, Sonora, Mexico. To forecast its acid mine drainage (AMD) generation potential, the modified acid–base …
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 ...
7.1 Gypsum board shall be shipped so as to be kept dry. 7.2 Gypsum board shall be stored so as to be kept dry, preferably inside a building, under a roof. Gypsum board shall be neatly stacked flat with care taken to prevent sagging or damage to edges, ends, and surfaces. 7.3 Where necessary to store gypsum board outside, it shall
