Wollastonite (CaSiO3) is the most researched and well-defined mineral in the field of CO2 mineralization, but it is also a sought-after process mineral and thus, not easily justified for large scale ex situ carbon sequestration, which requires an energy-intensive step of comminution to increase reactivity. Wollastonite-rich mine tailings are a side stream with an already fine …
Considering C O 2 emissions during production and re-mineralization during hardening, natural hydraulic lime (NHL) has been deemed an ideal cementitious material …
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Quartz was the most dominant mineral crushed during the mining process from gangue and/or rock-forming minerals from quartz vein and host rock in the study area [50,51] (Table 2). Calcite ...
Download scientific diagram | X-ray diffraction (XRD) results for the tailing sediment (ca calcite, do dolomite, gy gypsum, il illite, ka kaolinite, mo montmorillonite, qz quartz) from publication ...
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Given the desired increase of roughly 1% calcite in each sample and the 55 g of DI water mass to reach saturation in the sample, a 40 g/L concentration was selected for the trona and CaCl 2 solutions used in these experiments. Details of the chemicals used in the four samples are shown in Table 1. Each sample had an equivalent final mass and ...
The tailings are composed of REE-enriched calcite (64–89 wt %) and fluorapatite (2–22 wt %), as well as biotite (6–17 wt %) and chlorite (0–7 wt %). Minor minerals include …
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Due to erosion, the tailings contain a large amount of quartz, feldspar, amphibole, pyroxene, calcite, dolomite, silicate minerals, and magnesium. The main chemical components are silicon, aluminum, calcium, and magnesium. etc., in which the content of silicon and aluminum is higher. Therefore, it is essential to fully use tailings resources ...
Download Table | Acid-base accounting analysis of the tailing samples studied from publication: Geochemical behavior and environmental risks related to the use of abandoned base-metal tailings as ...
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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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Calcite is known for its distinct physical properties, which contribute to its identification and utility in various applications. Here are some of the key physical properties of calcite: 1. Color and Transparency:Calcite can occur in a wide range of colors, including colorless, white, gray, yellow, green, blue, and even shades o…
According to the results from Table 2 and Fig. 4, the iron tailing slag was primarily composed of elements such as oxygen (O), magnesium (Mg), silicon (Si), aluminum (Al), iron (Fe), and calcium (Ca). And the concentrations of Ca, Mg, and Si were relatively high, while Al was present in lower amounts. ... Quartz and calcite, both mineral ...
Particles with diameter between +0.038 mm to −0.074 mm were obtained after wet sieve. Both bastnaesite and calcite samples were dried over at 40 °C vacuum oven. The chemical composition and X-ray diffraction pattern (XRD) measurements of bastnaesite and calcite are shown in Table 1 and Fig. 1. The results indicated that the samples with high ...
Key Function; Arrow right: When focused on a calcite-tab-title, moves focus to the next calcite-tab-title.If the current focus is on first calcite-tab-title, the focus will cycle to the last calcite-tab-title.: Arrow left: When focused on a calcite-tab-title, moves focus to the previous calcite-tab-title.If the current focus is on last calcite-tab-title, the focus will cycle to the first ...
Microbially induced calcite precipitation (MICP) technique for soil treatment has been the subject of extensive research; MICP treatment has shown the capability to modify the physical,...
Microbially induced calcite precipitation (MICP) can be used for the superficial biocementation of tailings, thereby preventing such emissions. ... A summary of the geotechnical characterization of the sand and synthetic tailing is presented in Table 1. Before assays were conducted, samples were dried in an oven at 65 °C for 24 h.
Iron tailings are rich in reserves and contain a large amount of SiO 2, and fly ash contains a large amount of Al 2 O 3, which forms a high-temperature melt during the reaction process, which can be used as a stress framework to provide strength for the ceramic granules after solidification (Li et al., 2021).In addition, titanium-containing blast furnace slag can …
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 was ...
On the other hand, owing to calcite's interacting with CMCS on the surface, a clear N1s signal was generated with a N1s atomic concentration of 1.22 %. Compared with bare calcite surface (Table 4), the Ca2p and C1s atomic concentrations decreased by 1.63 % and 0.29 %, respectively. Meanwhile, the O1s content increased by 0.7 %.
A technology of fluorite tailings and calcite type, which is applied in the direction of solid separation and flotation, can solve the problems of low utilization rate of tailings pond, pollution of flocculation backwater, poor sorting efficiency, etc., to solve the problem of difficult concentration and reduce inventory Stress, Adaptive Effects
1. Introduction. Iron ore tailing (IOT), as an industrial solid waste generated during iron ore beneficiation, discharges more than 10 billion tons of tailings and waste rocks every year in the world [1].Over the past thirty years of reform and opening up, with the rapid development of China's iron and steel industry, IOT has become one of the major industrial solid wastes in …
Despite consisting largely of non-reactive silicates and primary calcite, very fine tailings showed promise in closed-chamber batch-type aqueous carbonation, achieving a conversion extent of over 28% in one hour at 100 bar …
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 mining waste known as tailings, which are typically stored in surface facilities. Windblown dust emissions from tailing deposits can cause severe damage to local …
Flotation tailings associated with the extraction of Pb and Zn in the Touiref mining district, Tunisia, contain galena, sphalerite, pyrite, and marcasite in a carbonate gangue.
This study examines a sustainable technique known as Microbially-Induced Calcite Precipitation (MICP) to improve the static liquefaction resistance of gold mine silty sand tailings. ... Table 1 summarizes the DSS tests carried out in this study. ... (to about ε vol < 2%) as a result of the stiffer (cemented) tailing's structure. Download ...
Microbial induced calcium carbonate precipitation (MICP) is a naturally occurring biomineralization process which harnesses the metabolic capability of some microorganisms to induce calcium carbonate (CaCO 3) precipitation in the presence of urea and a calcium source (Cheng et al., 2020).The precipitation of calcium carbonate by MICP can be …
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 inappropriate management …
The results show that as the degree of oxidation and acidification of tailings sand increases, the overall structural performance and load-bearing capacity decrease, and its …
˜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 ...
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.