The raw material contained CaO, Fe2O3, and SiO2, which formed augite with a low fusibility point. In contrast, the molten decomposition products of potassium feldspar and CaSiO3 ions formed anorthite, which has a high fusibility point. Therefore, potassium feldspar is not recommended for use as a flux in tailing systems with high calcium content.Web

A sample has been collected for isotopic age determination. Figure 3 draws upon the results of our reconnaissance mapping, and compiles mapping (Chapman, 1970; Gutrath, 1980) and drill core ...Web

12.5 Carbonation of anorthosite tailing waste residues. Anorthosite is an igneous rock and has been defined based on its content of more than 90% plagioclase feldspar (Streckeisen, 1976 ). It has a minimal mafic component (0–10 wt.%) of pyroxene, ilmenite [Fe 2+ TiO 3 ], magnetite, and olivine.Web

300 kg of fresh tailing sample obtained from Forumad Plant, was used in the magnetic separation studies, an average grade of Cr 2O 3 determined % in the tailing depot of shaking table operation by XRF, also different mineral phases had been determined by XRD, which were chrysotile, Augite, Albite, Chlorite, and Chromite. Chemical analysis . Get ...Web

augite tailing sampling. منزل; augite tailing sampling "Audit Sampling 101" Audit sampling is the application of an audit procedure (test of control or substantive testing) to less than of the items within an account balance or class of transactions for the purpose of drawing a general conclusion about the account balance or the entire.Web

Soil samples were collected from the surface soil close to the sampling tailing pile. Before any treatment, the stones and plant materials in the samples were removed, and then all the collected samples were air-dried, ground, and passed through a 2-mm sieve. ... albite, pyrite, calcite, diopside, and augite. The main minerals in soils are ...Web

Once the collection phase was concluded, each tailing sample was subject to a single additional NAG test to evaluate the AMD potential of the site. This was done to relate the potential of AMD generation with the potential of the tailing deposit to release polluting runoffs from the mineral matrix present in the tailings. ... Augite (Ca(Fe,Mg ...Web

This paper reports the results of mineralogical and geochemical research undertaken at one of the most representative waste-rock and tailing dumps, containing …Web

Flotation of the artificial mixture ground sample in the presence of PGA confirmed the benefits, giving a maximum Fe recovery and grade of 84.4 and 62.5%, respectively.Web

Augite is a rock-forming mineral that commonly occurs in mafic and intermediate igneous rocks such as basalt, gabbro, andesite, and diorite. It is found in these rocks throughout the world, wherever they occur. …Web

The sample contained 2.5% CaO. Low modal abundances ( 0.7%) were reported for MnO, Na 2 O, K 2 O and TiO 2. The sample exhibited a slightly negative loss on ignition (LOI = -1.3%), which was ascribed to the oxidation of ferrous iron (Fe2+) contained in e.g. spinel group minerals, to ferric ion (Fe3+) [6]. 2.2. Thermochemical treatment (static ...Web

In the deep layers of the profile (60–100 cm), the tailing samples consisted of augite, amesite, and anorthite as the main phases. The heterogeneity of tailings at …Web

In a normal leaching scenario using neutral water, these wastes exhibited leached amounts (also known as release) as high as 0.5%, 3% and even 30% for …Web

The bituminous coal sample, with 49.7 pct fixed carbon, 6.3 pct moisture, 11.1 pct ash, ... The XRD pattern of the tailing indicates that the gangue mainly includes quartz, augite, and anorthite. The existence of a small amount of metallic iron in the tailing is clear, which matches well with the above-mentioned result.Web

Bioavailable As was the strongest determinant of the tailing microbial community. ... was chosen as the sampling site. Specifically, samples of dry and wet stockpiled tailings were collected to identify their geochemical properties including metal content, mineral composition, and particle size. ... the contents of augite in the tailings of …Web

In this work, a bench-scale process was developed using mineral-processing methods to recover iron from a placer deposit located in Bardaskan, Khorasan-e-Razavi, Iran.Web

The sodium roasted-acid leaching tailing (SRALT) of vanadium slag with a certain amount of vanadium exhibits potential environmental risk. To investigate the leaching behavior of vanadium from the SRALT, neutral batch leaching tests were performed. The evolution of vanadium concentration, pH, redox potential (Eh), dissolved oxygen, and …Web

The SLNR matrix typically comprises cumulus orthopyroxene and plagioclase with interstitial augite, phlogopite, sulfide, and less common granophyric intergrowths of K-feldpsar and …Web

Sampling and sample preparation3.2.1. Sampling. Altogether, 161.3 kg of pyrometallurgical slag, mineral processing tailing and hydrometallurgical wastes were collected according to the random sampling approach (Gy, 1979, Smith, 2001). Near-surface (0–20 cm) and deeper samples (1–5 m) covered the entire space …Web

With the exploring and developing of mineral resources in the Tibet Autonomous Region for many years, a large number of tailings have been produced. A total of 17 tailings samples from borehole cores were collected from different tailings ponds in different regions of Tibet. The results showed that the mineral composition and content of …Web

Fraction of Ca 2 Nb 2 O 7 within the sample with no intentionally added Nb 2 O 5 (Nb 0) should originate from a small amount of Nb 2 O 5 added with Bayan Obo tailing. Therefore, it may suggest the solution of Nb cations within diopside crystals or residual glass must be very limited; otherwise, there will be no formation of Nb-rich secondary ...Web

The results indicate that the sample contains a predominant amount of gangue silicate minerals, such as clinopyroxenes (diopside, augite) and amphibole (actinolite), with some amount of magnetite. Thorite mineral is detected in minor amounts in this sample and in liberated form, and in some parts, it shows intergrowth with magnetite …Web

One kg of fine paste tailing sample (dried at 40 °C, sieved <2 mm) was subjected to kinetic tests to predict the longer-term acid drainage behavior. Humi dity cells involve re-Web

Understanding microwave-assisted breakage and fracturing of hard rocks necessitates the characterisation of the dielectric properties of basic rock-forming minerals. In the literature, there is a significant discrepancy in the loss factors (i.e., the ability of minerals in absorbing microwave energy) of the gangue minerals due to the fact that …Web

An important initial step towards the reclamation of mine tailing sites is to detect the presence of acid-generating, sulphide-rich minerals and determine their spatial distribution. In this study ...Web

Pi and Pan et al. prepared glass–ceramics with augite as the main crystalline phase using tailings/slag as raw material [18, 19]. It was found that Zn 2+ can enter the lattice of augite by substitution and exist in the form of solid solution, and with the increase of ZnO content, it may lead to the generation of the second phase (CaZnSi 2 O 6).Web

The Raman signal integration time was set to 10 s, and the laser power was 400 mW. The sample slurry was constantly mixed with a mechanical rotator to prevent the gravitational sedimentation of the …Web

(c) Cross section of one fragment of a laser melted sample (10 kW, 600 s) showing the different material types within the sample. ( d ) Melting depth of EAC-1A powder bed as a function of laser ...Web

The second sampling site (hereafter named TA) is a small and well-defined open-air tailing dump. It is located at the bottom of the WR pile and occurs as an elongated, flat body (about 10 m in length and 1 m in height) lying adjacent to a small stream collecting waters from some mine adits (Fig. 4 ).Web

The major elements of tailings mainly included Si, Al, Fe, Mg, Mn, Ca, Na, K and so on. S existed in different types of tailings. In the analysis of trace element …Web

4,： 673 t[2]．、 [3], ...Web

Soluble forms of vanadium in the vanadium tailing also pose a serious environmental problem. ... The leaching test standard refers to a particle size of solid sample smaller than 9.5 mm, 100 g of solid sample and liquid-to-solid mass ratio of 20:1 (m/m) is used for one batch leaching. ... (∼58%) and O (30%) presented in regions 3, 4, …Web

Description. Augite is a rock-forming mineral of the pyroxene group commonly found within igneous and metamorphic rocks. Because its chemical structure is highly variable, augite might be considered by …Web

Associations of Gangue Minerals in Coal Flotation Tailing … of timed-release flotation test are shown in Figure 2. As observed, after timed-release flotation, the roughing tailing product T r1 occupied the highest yield, which was 73.13%, and the yields of tailing products obtained by the four subsequent re-flotationswere all …Web

Once the collection phase was concluded, each tailing sample was subject to a single additional NAG test to evaluate the AMD potential of the site. This was done to relate the potential of AMD generation with the …Web

In contrast, by reducing the thorium cut-off grade in the concentrate part, the weight of the ore sample is increased, causing less tailing to be produced. Thorium grade in concentrate and tailing products can be determined based on the optimal cut-off grade. From Table II, about 15.3% of the feed sample has a thorium grade of < 100 ppm ...Web

Minerals containing more than 20% in tailings could be recycled, such as calcium andradite and augite in iron ore tailings, as well as quartz and augite in copper mine tailings. Calcite had more active …Web