Yolov-3 is a multi-class detection algorithm that is superfluous for binary classification tasks, such as coal gangue recognition, resulting in inefficient utilisation of computational resources and prolonged training duration. ... the distinct mineral components of coal and gangue result in varying X-ray attenuations [105], [106], [107].
The reduction of reactive silica and other gangue minerals present in bauxite ore is the major concern for any alumina processing industries today. ... bauxite export permits to companies building alumina refineries in Indonesia (Indian Minerals ... were subjected to detail characterization, crushing and liberation, classification and ...
) are two typical minerals in gangue.16−18 In the flotation process, these gangue minerals may enter into clean coal products through coating or entrainment. Numerous studies have been carried out to explore the adverse effectsof the nonselective flotation behavior of gangue minerals in the flotationprocess.19−23 However, the associations ...
common gangue mineral associated with gold) is 2.65 (i.e., gravity concentration works because gold is heavy, and quartz is light). Often gravity separation methods are confused with size classification because large particles of light minerals can behave like a small particle of a heavy mineral. The most
Figure 6.23 The paragenesis diagrams of ore and gangue minerals of Tumpangpitu area 88 Figure 7.1 The classification diagram of Zr/TiO 2 vs Nb/Y for volcanic rocks 90 Figure 7.2 The total alkali silica (TAS) classification diagram of plutonic igneous rocks 90 Figure 7.3 Zr-Ti tectonic discrimination diagram for volcanic rocks 91
SUMBAWA ISLAND, INDONESIA Win Kant∗1,2, I Wayan Warmada1, Arifudin Idrus1, Lucas Donny Setijadji1, and Koichiro Watanabe3 ... Figure 4: Paragenetic diagram of ore-gangue minerals assemblage of polymetallic epithermal quartz veins at Soripesa prospect area. Figure 5: Elemental composition and peak intensity of some pyrite minerals detectedby ...
Details of the common iron ore and associated gangue minerals found in many iron ore deposits and iron ore products are given in Table 2.1.The three most common iron ore minerals are magnetite, hematite (the spelling "hematite" is preferred here over "haematite"), and goethite, which together account for an estimated >99% of the iron minerals contained in world …
Selected samples were analyzed by using ore mi-croscopy and SEM-EDX. Ore minerals show re-placement, ex-solution, colloform, and zonal tex-tures. The paragenesis diagram was made …
alteration mineral of intrusive rock was identified by thin section observation and XRD was quartz, chlorite, illite and pyrophyllite. From observation of thin section, hornblende and plagioclase …
In this paper, the effect of gangue minerals on the hydrophobic recovery of gold is being investigated using ores obtained from the active small scale gold mining sites in Tanzania. …
In the Tanjung area as well-found sulfide minerals, namely pyrite, chalcopyrite, covellite, and sphalerite; chromite and manganese of the oxide-hydroxide group; and gangue …
If the internal atomic arrangement is lacking, then it is an amorphous substance. A rock is generally composed of various minerals and if the rock contains valuable minerals frOm which metals can be extracted at a profit, it is called an 'ore'. The unwanted mineral in an ore is called gangue (i.e., generally rock forming minerals). For ...
As depicted in Figure 1, two main methods can be employed for classifying coal and gangue: manual classification and automatic classification.In manual classification, the operators primarily sort coal and gangue based on color and other visual characteristics. The working conditions for manual classification are generally more strenuous and demanding, posing risks …
In this paper, we focus on the ore-gangue mineralogy of the Dairi deposit in order to reveal the paragenetic sequence, ore deformation, and fluid flow direction. Trace elements in …
Gangue minerals are mainly nonmetallic minerals, but also include metal minerals that have no comprehensive utilization value due to their low content, such as pyrite, galena, and sphalerite in copper ores. The proportion of ore minerals and gangue minerals varies with ore types and with rich and poor mineral grades in the same ore.
If the internal atomic arrangement is lacking, then it is an amorphous substance. A rock is generally composed of various minerals and if the rock contains valuable minerals frOm which metals can be extracted at a profit, it is called an 'ore'. The unwanted mineral in an ore is called gangue (i.e., generally rock forming minerals). For ...
Cassiterite and ilmenite are the predominant mineral phases in concentrates; quartz, tourmaline, and K-feldspar are common gangue minerals in most sample types; clay …
Gold mineralisation in the River Reef Zone of the Poboya prospect, Central Sulawesi, Indonesia is hosted within metamorphic and igneous rocks. Hydrothermal alteration is zoned from inner,...
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The method utilizes just a few characteristic spectra of 3740–3700 cm −1, 1790–1750 cm −1, 1615–1583 cm −1, 1580–1540 cm −1, 1550–1440 cm −1, 1270–1210 cm −1 and 867–854 cm −1 to achieve 100 % high-accuracy classification of coal gangue and identification of coal types with total 250 spectra, such as bituminite ...
(T) = training samples, (V) = validation samples. 2.2. Mineral Composition Analysis In the real world, pure carbonate minerals are rarely found, and any natural sample might include a mixture of different minerals. Therefore, the hard classification of mineral types by referencing to a spectral library is almost impossible for making sense.
of ore minerals and gangue minerals. In this Table, big difference of combination of ore minerals between 165.20m and 176.00m was confirmed. From this result and sample observation, it is estimated that there are boundary of primary sulfide zone and intrusive rock. Figure 11. Picture of ore mineral. In reflected
identify coal and gangue automatically.18,19 Su et al. improved the LeNet‐5 model by enhancing the activation function, network depth, and the size and number of convolutional kernels to improve coal and gangue classification accuracy.20,21 Pu et al. applied the VGG16 model as a classification model for coal and gangue while
Clay minerals are mainly fine-grained aggregates with scaly distribution and symbiotically with serpentine. A small amount of fine-grained black iron mineral is disseminated in the clay minerals, and the particle size is about 15 μm (Fig. 8a). Chlorite is the major clay mineral in the nickel laterite deposit in Southeast Sulawesi, Indonesia.
gangue minerals) so takes up the shape of the intergranular spaces left behind. Examples include numerous sulfides, in many cases crystallizing from liquids immiscible with, and of lower melting point than the silicate magma. Orthocumulate texture - …
Some of the ores, however, contain impervious inert gangue and reactive ore minerals. Leach solution can only access gold locked in impervious gangue minerals through HPGR-induced pores and/or cracks.
Common Gangue Minerals 133 The positive identification of non-opaque minerals in reflected light is very difficult if not impossible, especially for the great number of minerals of relatively low refractive indices. The methods which are developed in this chapter give little promise of truly practical results […]
Gangue minerals: Usually worthless, non metallic minerals of a deposit that may be: Introduced minerals, b-The inclosing rocks c-are discarded in the treatment of the ore Economic minerals:Are natural resources which, once extracted and used, are notrenewable. Grade:The concentration of an element in a mineral deposit is termed
The mineral samples were sourced from coal gangue minerals at a coal preparation plant in Anhui Province, China, and another coal preparation plant in Shaanxi Province, China. ... A Bayesian optimal convolutional neural network approach for classification of coal and gangue with multispectral imaging. Opt Lasers Eng (2022) W. Wang et al ...
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The mineral samples were sourced from coal gangue minerals at a coal preparation plant in Anhui Province, China, and another coal preparation plant in Shaanxi Province, China. ... A Bayesian optimal convolutional neural network approach for classification of coal and gangue with multispectral imaging. Opt Lasers Eng, 156 (2022), Article 107081 ...
effects of gangue on the environment and across the value chain in the mining industry are required. State-of-the-art knowledge to manage gangue minerals in pre-concentration, mineral separation and extractive metallurgy processes de-serves further discussion. In comminution circuits, gangue minerals are problematic
The ratio between combustible organic matter and inorganic impurities of coal is also one of the variables in coal classification. Coal gangue is a significant residue of coal mining and cleaning, which accounts for approximately 10–15% of raw coal [3].The first group of impurities in coal, which are also the most commonly encountered, are quartz (SiO 2) and clay …
Based on the observation of how certain minerals preferentially replace other minerals, a set of "rules" has been proposed regarding the pattern of mineral replacement in ores: 2.6.2.1 Sulfides replace gangue or ore minerals 2.6.2.2 …