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The percentage of recovery is very low for these extenders, i.e. 30% for china clay and 70% for calcite [21]. 2. Materials and methods2.1. Characterization of copper tailing waste (as received)Copper tailing waste was collected from Khetri, Rajasthan, India. It was characterized for elemental composition, mineral phases, …
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A series of characteristics of the two tailing samples are listed in Table 1. From the table it can be seen that the main differences in composition are calcite content (higher in MT 2), free chalcopyrite content (higher in MT 2), and magnetite content (higher in MT 20). The last is an indication of the ongoing oxidation of the tailings.
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The major benefit of using trona to precipitate calcite is its relatively high solubility in water, i.e. 200 g/L at 25 °C (Ozdemir et al. 2010 ), compared to other inorganic compounds …
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Its chemical composition is listed in Table 1 and the mineral composition is shown in Fig. 1. Note that mullite in the original and calcined tailing results from the addition of fly ash into the mud of the tailing for easier filtering. ... Compared to the mineral composition of the calcined tailing, two new crystalline phases, calcite and ...
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Mine tailings are often considered problematic materials because of their loose depositional fabric and susceptibility to static and cyclic liquefaction failures. Yet, they are often stored behind tailings' dams in a highly saturated state, posing significant environmental, social, and economical hazards. This study examines the application of a …
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Honey calcite has a smooth texture and can be polished to a high shine. This polishing brings out its sunny color and makes it even more striking to look at, especially when the light catches it just right. Where you can find honey calcite. Honey calcite is located mainly in Mexico, where it is found in various mineral-rich regions. …
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High-grade magnesite, dolomite and calcite ores were broken, ground and sieved, then the size ranging from 37 to 74 μm were selected for micro-flotation experiment, and the size of −74 μm was further ground to −2 μm for zeta potential measurement and FTIR analysis. The elemental analysis of the three samples were presented in Table 1 ...
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Definition. Powder X-ray Diffraction (XRD) is one of the primary techniques used by mineralogists and solid state chemists to examine the physico-chemical make-up of unknown solids. This data is represented in a collection of single-phase X-ray powder diffraction patterns for the three most intense D values in the form of tables of …
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Mining activities offer clear economic benefits for mineral-rich countries. However, mining operations can produce several environmental impacts. Many of these are associated with generating and managing …
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In this paper, the potential of sulfonated naphthalene formaldehyde (SNF) condensate as a depressant in the flotation separation of scheelite from calcite was verified and investigated. The results of microflotation experiments showed that SNF had a stronger depressant performance on calcite than a conventional depressant—water glass and …
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The use of bulk solid-waste iron tailing (IOT), red mud (RM), and oyster shells to prepare cemented paste backfill (CPB) can effectively solve the ecological problems caused by industrial solid waste storage …
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Historically, safe containment has been the main goal of tailings management. Disposal has taken place in sizable surface impoundments that are enclosed by dams or embankments, as well as in subterranean workings and unnatural depressions [10], [11].However, the environment and communities are seriously endangered by the …
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Dissolution of calcite (Table 1) releases Sr and Ba (Fig. 5 c and d) as well as Mn (Fig. 6 b). ... Rare earth elements, hosted mainly by calcite and fluorapatite, are …
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Calcite CaCO 3. Origin of Name From the Latin word calx, meaning "burnt lime.". Figure 14.361: Calcite cleavage fragments Figure 14.362: Calcite cleavage fragments. Hand Specimen Identification Calcite is identified by its hardness of 3, rhombohedral cleavage, and effervescence in cold dilute HCl. It may be confused with …
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Table 3 also shows that the application of treatment using 1.1 M of CaCl 2 induced a higher concentration of anorthite, vaterite and calcite compared to the other treatments, which …
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The sorption maximum of calcite was 26 mg P kg −1. This result was used to calculate the surface coverage of calcite by sorbed P. The model indicated that only 1 4 to 1 8 of the unit cell surface was able to adsorb phosphate. High-gradient magnetic separation (HGMS) was used to fractionate soil clays into magnetic and tailing fractions.
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The floatability of fluorite and calcite as a function of NaOl dosage at pH 8.0 is shown in Fig. 4.As seen in Fig. 4, flotation recoveries of fluorite and calcite significantly increased with increasing dosage of NaOl and remained constant at high collector concentration.The flotation recovery of both fluorite and calcite was over 90 % using 1.5 …
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Biocementation has emerged as an effective technique for controlling liquefaction by reducing soil or tailing substrate permeability through calcite precipitation (Ferris et al. 1996). Biocemented soils exhibit improved resistance to liquefaction due to disrupted flow paths, reduced permeability, and decreased pore water pressure …
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What is Calcite? Calcite is a rock-forming mineral with a chemical formula of CaCO 3.It is extremely common and found throughout the world in sedimentary, metamorphic, and igneous rocks. Some geologists consider it to be a "ubiquitous mineral" - …
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Calcite is a carbonate mineral, currently used as a decorative block. Calcite drops as an item if mined by any pickaxe. If mined without a pickaxe, it drops nothing. Calcite generates naturally as part of the structure of amethyst geodes, between the smooth basalt and block of amethyst layers. It also generates in the stony peaks in strips. Calcite is currently …
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Table 2 summarizes the direct shear tests of this study. Consolidation void ratios ... The immediate precipitation and the binding of calcite to the tailings' particles …
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Additionally, about 0.17 vol.% of calcite is present in the tailings waste (Table 2). The dissolution of calcite is directly attributed to H + activity (Busenberg and …
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In order to investigate whether SH is suitable for separating calcite from rhodochrosite, the samples of rhodochrosite and calcite were mixed by mass ratio of 1:1 and floated at pH 11 using NaOL and SH as collector and depressant, respectively, and the result is presented in Table 1.In the mixed sample, the theory grades of Mn and Ca are …
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Tailing sand contains a large number of heavy metals and sulfides that are prone to forming acid mine drainage (AMD), which pollutes the surrounding surface environment and groundwater resources and damages the ecological environment. ... The XRF results of the pyrite tailings are shown in Table 1. The pH of the pyrite tailings sand …
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A series of oedometer and triaxial tests was conducted on the gold tailing (summarized in Table 2, Table 3) using front loading oedometer frames.The diameters of the rings used were 50 mm and 30 mm, the latter having a floating ring design in order to reduce wall friction (Rocchi and Coop, 2015; Okewale and Coop, 2017), giving resultant …
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A large number of tailings and industrial waste residues produced by mineral resources mining are stored in tailings pond except for a small part of construction materials 1,2,3,4,5,6.Therefore ...
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Microbial induced calcite precipitation (MICP) is probably the most studied biogeochemical process. It promotes calcite precipitation, as a result of biological activity of different microorganisms. Available research indicates that MICP is a tool that has the potential to contribute to a more sustainable management of tailing deposits.
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˜e basic physical parameters of the graphite tailing samples are listed in Table 2. According to the data presented in the table, the porosity of graphite tailings is 41.53%. e natural dry ...
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Except for GS1, GS2, GS3 and GS4, which did not contain a water table, all samples contained fine tailing particles near the water table (250 ± 50 cm), which are confirmed calcite (CaCO 3), leading to acid neutralization. However, GS6 and GS10 have profiles containing coarse particles near the water table and did not contain calcite (Fig. …
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