This research takes Panel 8222 of Datong Coal Mine Group Co., Ltd. as the research object. The layout of Panel 8222 is shown in Fig. 2, where the width is 230.5 m, the length is 2644.5 m and the average dip angle is 2°. Coal 3–5 is mainly mined in Panel 8222, the seam thickness is in the range of 8.17–29.21 m, and the variation coefficient ...
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2.2. Sampling. As shown in Fig. 1 B, 26 sampling sites were selected across the coal gangue-filled reclamation area at Xinzhuangzi mine, Huainan city, Anhui province, China. Surface (0–20 cm depth) soil samples (each of approximately 1 kg) were systematically collected from agricultural land, orchard, forest land and culture pond of …
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Coal gangue (CG) is a solid waste discharged in process of coal mining and washing, which accounts for 8–20 % by weight of the total coal output. ... Mechanical grinding, thermal treatment and chemical activation are generally used to destroy crystal structure of kaolinite in CG particles and further improve its activation.
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Datong Coal Mine Group Yanggao Thermal Power Co., Ltd Application: Coal Preparation Plant The Evaluation by Customer: In August 2013, our coal preparation plant installed …
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Study on modes of occurrence and selective leaching of lithium in coal gangue via grinding-thermal activation. Hangchao Chen Lei Zhang +6 authors Changchun Zhou. Chemistry, Engineering. ... Distribution and Enrichment of Al-Li-Ga-REEs in the High-Alumina Coal of the Datong Coalfield, Shanxi Province, China. P. Shao Hongjiang Hou …
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9 coal gangue sourced from Antaibao and Donglutian open pits, respectively. The Datong coaleld is located in the northern part of China's Shanxi Province. The coaleld is a synclinal structural basin with an axis of NE–SW. NYP-1, NYP-2, and NYP-3 are the No. 3–5 coal gangue from the Nanyangpo mining area of the Datong coaleld. Samples
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Top coal caving is a process for the rational extraction of large amounts of coal resources. However, this process readily causes release of excessive amounts of gangue during the coal release process. The conventional technique, which involves visual inspection, is not only labor-intensive but also can introduce inaccuracies. Coal and …
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The coal gangue was ground into fine powder (CG) [20], [21] and its surface area is 400 m 2 /kg; the industrial analysis is shown in Table 1 and the chemical composition is shown in Table 2.The GBFS used in the experiment is the S95 granulated blast furnace slag powder which conforms to the Chinese standard GB/T 1806-2008 and …
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The coal gangue in China is the core field of bulk solid waste comprehensive utilization due to its massive stock and emission, high concentration of output, small proportion of high-value-added utilization, and outstanding environmental impact. Hence, the prospect of resource utilization of coal gangue is broad. The existing disposal …
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Abstract. Seriously environmental pollution has been induced by discarding of coal gangue (CG) that produced during coal mining and washing processes. Using …
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In this study, coal gangue (10 g sample for each experi-ment) mixed with CaCO3 and corn stalk powder was used to prepare coal gangue-based silicon fertilizer using a high-temperature activation furnace (DC-B-2, Beijing Original Technology Co., Ltd., China). For the high-tem-perature calcination process to be completed, the mixture.
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Sorting gangue from raw coal is an essential concern in coal mining engineering. Prior to separation, the location and shape of the gangue should be extracted from the raw coal image. Several approaches regarding automatic detection of gangue have been proposed to date; however, none of them is satisfying. Therefore, this paper …
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Most of the coal gangue in the Late Paleozoic strata of North China is rich in kaolinite [12]. Kaolinite is a naturally occurring clay mineral with a layer structure comprised of siloxane and ...
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Coal gangue (CG) is generated during coal mining activities. ... CG was collected from Datong region, Shanxi province, China. The received CG was first calcinated at 900 °C for 6 h in an incinerator, followed by grinding the particles using a crusher and sifting with sieves to a particle size of 0.075 mm, 0.5–1.0 mm and 5.0–20.0 mm. CG a ...
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1.2. Source and distribution of CG in China. CG is a kind of black gray shale rock produced in the process of coal production. China is the world's largest coal producer (Munir et al., 2020) and also the largest coal consumer.Coal provides about 62% of China's energy demand (Mita et al., 2015).In the process of sorting and processing, the production of …
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The finely ground sl ag produced by rapid air cooling and flue ga s grinding is an environmentally . ... In this study, geopolymers synthesized from coal gangue (waste generated during coal mining ...
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DOI: 10.1016/S0165-2370(03)00086-X Corpus ID: 93124934; Influence of heat treatment conditions on release of chlorine from datong coal @article{Guo2004InfluenceOH, title={Influence of heat treatment conditions on release of chlorine from datong coal}, author={Ruixia Guo and Jianli Yang and Zhenyu Liu}, journal={Journal of Analytical and …
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Experimental studies were carried out to find the difference of preheating characteristics of Datong coal in O2/CO2 and air atmospheres by a circulating fluidized bed. It is found that pulverized coal could be both steadily preheated to above 800°C in the two different atmospheres, but the temperature distribution was more uniform along the …
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Project-level coal details. Permit(s): April 29, 2015; Background. Datong Coal Mining Group has proposed a power station of two units of 350 MW each. The environmental …
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The main mineral components of the raw coal gangue are kaolinite (52.2%), mica (16.9%) and quartz (16.1%), and the main chemical components of the low-heat and low-carbon coal gangue are SiO 2, Al 2 O 3 and Fe 2 O 3. ② Slag: S75 slag was collected from Handan Jinyu Taihang Cement Company (Hebei, China). ③ Fly ash: Grade Ⅱ fly …
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for their nearly mono-mineralic composition with low impurity content [1–4]. At Datong, coal-measure kaolinite is commonly developed in the roof, floor and coal gangue of the No.4 coal seam of the Shanxi Formation, as well as in the No.2, No.3, No.5, No.8 and No.9 coal seams of the Taiyuan formation [2].
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Pyrite is common in coal gangue formed in a reduced environment and has a significant influence on the recycling utilization of coal gangue. Four types of pyrite with different structures and morphologies, namely octahedral pyrite framboid, pentagonal dodecahedral pyrite framboid, irregular grain pyrite, and euhedral octahedral crystalline …
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This paper provides new geochemical data focusing on valuable elements in the coal, parting, and floor samples in the No. 5 coal seam of the Taiyuan Formation from the Wujiawan mine, Datong coalfield, northern China. The minerals mainly consist of kaolinite, calcite, and pyrite, as well as trace amounts of quartz and illite. The No. 5 coal …
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1. Introduction. Coal gangue, a waste produced during coal mining, has been regarded as the largest source of industrial waste in China. It is estimated that the production of 1 t coal generates 0.1–0.25 t coal gangue [1], and the total stockpile of coal gangue exceeds 6 billion tons in China [2], [3].The coal gangue not only occupies …
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Grinding tests of coal gangue samples were conducted to explore the effect of selective grinding on the pre-enrichment of REY in coal gangue. The effect of selective grinding on the enrichment and distribution characteristics of REY was investigated by changing the grinding time (0, 2, 4, 6, 8, and 10 min).
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Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications. ... Tan X.J., Cheng J., Li L. Concept and Practice of Open-pit Mining Area Restoration and Reuse—Taking an Open-pit Coal Mining Area in Datong, Shanxi as an Example. ... Wang J. Study on activity of calcined grinding high/Low calcium coal ...
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Three coal gangue dumps in the Datong region subjected to a range of reclamation conditions were investigated to assess the influence on coal fires. Coal, coal …
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Coal gangue is one of the largest mine solid wastes in China, and its discharge and stockpiling have caused resource waste, environmental pollution and other problems. ... GUO YX, YAN KZ, CUI L, et al. Improved extraction of alumina from coal gangue by surface mechanically grinding modification[J]. Powder Technology, 2016, …
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Upon grinding and calcination, the reactivity of coal gangue is found to be on par with the traditional precursors such as fly ash and ground granulated blast furnace slag. This indicates the possibility of coal gangue-based geopolymers in replacing traditional binders for various applications such as bricks, tiles, precast concrete …
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The Pingshuo thermal power plant is a 1,320MW supercritical coal-fired power project located in the Shanxi Province of China. It comprises two 660MW generating units that were commissioned between September and October in 2020. The Pingshuo coal-fired power facility is owned and developed by Sujin Energy Pingshuo Coal …
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