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Coal gangue is a typical waste produced during coal mining and washing. Synthesis of zeolites via coal gangue can contribute to resource recycling and environmental protection. In this study, high-silica SSZ-13 was synthesized by one-step hydrothermal synthesis from coal gangue without the traditional pretreatment methods of high-temperature roasting and alkali melting, making it more ...
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Thus, it is difficult to locate and recognize coals and gangues on the transmission line through visual recognition. To solve the problem, this paper proposes a visual positioning and recognition method for gangues based on scratch feature detection. Firstly, an image acquisition system was designed to capture the clear and suitable images.
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Here, we successfully prepare a SiO 2 -Al 2 O 3 aerogel utilizing coal gangue as a raw material, which is a zero-cost mining waste. More importantly, ambient pressure drying used in this work overcomes the drawbacks of supercritical drying. ... Paper. Submitted 02 Oct 2015. Accepted 20 Nov 2015. First published 23 Nov 2015. Download Citation ...
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Physicochemical properties of coal gangue. The coal gangue used in the experiment came from the Tunlan mining area in Shanxi Province, China. The appearance of coal gangue is black, the water content is 1.23%, and the ash, volatile and fixed carbon are 71.84%, 10.20% and 16.70%, respectively. Table 1 shows the chemical composition results of ...
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This paper investigated the production of alumina from Nawan kaolin by acid leaching with sulfuric and hydrochloric acids. Kaolin was calcined at 850°C and was leached with 6 M acid at 90°C, 5M NaOH. Expand 16 PDF Save Alert Effect of alkali roasting and sulfatization on the extraction of different metal oxides from waste alum sludge
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In this paper, the thermoelectric power generation sheet is used to convert the heat energy of the coal gangue hill into electrical energy. The working principle of the thermoelectric power generation sheet is based on the Seebeck effect, which relies on the temperature difference between the hot and cold ends to generate electric potential.
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The main contributions of the work in this paper are the following: (1) propose a dynamic target detection method and establish a data set of coal and gangue, (2) propose a movement planning method in line with the coal gangue sorting strategy, and (3) control the robot to complete the sorting task.
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2.1 Experimental materials. The chemical composition of the coal gangue and iron ore tailings used in the test is shown in Table 1. The coal gangue was crushed to -2 mm and then ground by a ball mill, after that the fineness of the coal gangue was 0.08 mm, and the residue after screened by a square-hole sieve was less than 8%; then it was calcined at 800 o C for 2 h to remove organic impurities.
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According to the component character of the coal gangue, the approaches to the coal gangue utilization, such as fuel substitute, building materials, chemical industry products, agriculture fertilizers, filling materials, were expressed in this paper. The measures of coal gangue development and utilization have double meanings of environmental...
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ABSTRACT: Coal gangue is residual abandoned coal, produced after the pre-processing steps of mining. It is an amalgam of several unwanted substances. It is important to separate coal gangue from lump coal before fed to thermal power plants. In this paper, investigation on the fundamental characteristics of coal images and gangue images with ...
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Jan 7, 2022The segmentation results are based on the segmentation results obtained by the AI algorithm, and the error rates of the pixel area and centroid coordinates of coal gangue are within 0.29%. This...
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IEEE Access Recognition and separation of Coal/Gangue are important phases in the coal industries for many aspects. This paper addressed the topic of Coal/Gangue recognition and built a new model called (CGR-CNN) based on Convolutional Neural network (CNN) and using thermal images as standard images for Coal/Gangue recognition.
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May 1, 2021In this paper, the physical, chemical and pollution characteristics of coal gangue are summarized, and the ecological restoration mode is divided into two modes: traditional "end treatment" and "treatment while piling".
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Feb 28, 2022Coal gangue (CG) represents a huge amount of industrial solid waste in China, and usually is used as a coarse aggregate to produce low-strength coal-gangue-based concrete. In this paper, in order to prove the possibility to obtain a higher-strength concrete with a higher CG utilization rate, reactiv .
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In this paper, the capillary water absorption capacity of the concrete with the coal gangue ceramsite was studied according to ASTM C1585 [31]; the effect of the coal gangue ... Figure 1: Coal gangue recycling: (a) coal gangue ceramsite; (b) production workshop. Table 1: Properties of the coarse aggregates. Types Bulk density (kg/m3) Rushing ...
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Coal gangue occupies large swathes of land resources, resulting in ecological fragility and various environmental problems. ... To prevent the leaking of raw soil particles, filter paper and gauze ...
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Jan 25, 2021In this paper, coal gangue is utilized as a replacement of coarse aggregate in structural concrete. The effects of coal gangue on the mechanical properties of concrete material, circular reinforced concrete column and concrete-filled steel tubular column are experimentally studied and discussed in detail.
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Coal Gangue, Heavy Metals, Release Activity, Potential Ecological Risk Assessment To cite this article Li Wan-peng, Sun Ya-qiao, Yao Meng, Dou Lin, Release Activity and Potential Ecological Risk Assessment of Heavy Metals in Coal Gangue of Hancheng, China, International Journal of Energy and Power Engineering.
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The utilization of coal gangue ash is therefore important to reduce China s environmental pollution. In this paper, current status of the research and development of gangue ash utilization in China is reviewed. ... / A study on the ash from coal gangue fired power plant-characteristics and application. 23rd Annual International Pittsburgh Coal ...
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Coal gangue is the largest solid waste produced by coal mines, accounting for about 10% of coal production. The annual emissions of coal gangue in China is about 150-200 million tons. Coal gangue causes solid, liquid and gas pollution, which not only wastes resources, energy and occupies a large amount of land, but
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Downloadable! Coal gangue-based geopolymer (CGGP) is one of the hot spots existing in the recycling of coal gangue resources due to its good comprehensive mechanical properties. However, the coal gangue structure is stable and reactivity is poor, so the coal gangue needs to be activated before utilization. In this paper, the microstructure changes of activated coal gangue by different ...
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7 days agoCoal gangue is a kind of black gray rock with low carbon content produced in the process of coal mining and washing ( Querol et al., 2008 ). Its main components are silicon dioxide (52%-65%), aluminum oxide (16%-36%) and ferric oxide (2%-15%) ( Han et al., 2019 ). The output of coal gangue is about 15%-25% of coal ( Li and Wang, 2019 ).
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Coal gangue has accumulated huge coal gangue piles, occupying lots of land as well as having striking influence on the neighboring environmental effects. This paper seeks a new way of coal gangue treatment in which the coal gangue blended with shale and sludge was sintered in rotary kiln to form lightweight aggregates.
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The main chemical composition of coal gangue is shown in Table 1. Figure 1 shows the XRD spectra of raw and calcined coal gangue at 700˚C. The main chemical composition of raw coal gangue is kaolinite and muscovite. After calcined at 700˚C, the diffraction peak of kaolinite decreases and the diffraction peak of quartz increases. 2.2. Test Methods
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Jul 16, 2022Abstract Nowadays, upcycling coal gangue into aggregates has become a popular method; nevertheless, the utilization of coal gangue fines (CGFs), a secondary waste generated during the production of coal gangue aggregates, is rarely concerned.
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Abstract: In coal production, the raw coal contains a large amount of gangue, which affects the quality of coal and pollutes the environment. Separating coal and gangue can improve coal quality, save energy, and reduce consumption and make rational use of resources. The separated gangue can also be reused.
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Sep 8, 2021Focusing on various problems in coal gangue detecting and recognising algorithms, such as limited receptive field, slow convergence rate and low accuracy of small particle recognition, this paper proposes a coal gangue detection and recognition algorithm based on deformable convolution YOLOv3 (DCN-YOLOv3).
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A natural fuel formed by partial decomposition of vegetable matter under certain environmental conditions. | Explore the latest full-text research PDFs, articles, conference papers, preprints and ...
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carbonaceous mud stone, clay and rock. Two coal gangue sample was collected through drilling hole from the single vertical direction. Samples of the same borehole contain roof and tonstein coal gangue. Two coal gangue samples were obtained from the roof (Z-1) and tonstein (Z-2) of coal mines multiple boreholes in Inner Mongolia.
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Tailing product T r1 exhibited the highest ash content of 67.75%, implying that a large number of coal and gangue combinations existed in the coal flotation tailings, which were difficult to separate directly. After two flotation separations, the low-ash products with a yield of 19.28% and an ash content of less than 10% could be recovered.
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the coal gangue is a kind of solid wastes from coal mining and separating,which is also a kind of grey-black rock harder than coal,characterized by low content of carbon and association with coal seams during coal accumulation.the impact of coal gangues on the environment has been expounded in the paper,and the comprehensive utilization purposes .
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This paper provides an overview on the current status of power generation in China using coal gangue. The government regulation towards the use of coal gangue for power generation is introduced. Emission of pollutants and low thermal power plant efficiency are the two major problems for the power industry firing coal gangue.
Get priceIt got to know ALPA through many ways. After visiting the factory for inspection and test, he chose to cooperate with ALPA and purchased the airflow classification production line. Now it has become a high-quality customer. Raw Material： Coal gangue Capacity： 6t/h Feeding Size： 5mm Product Size： D97:6.55μm Address： Shanxi I want solutions
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The present paper discussed the effects of fly ash (FA) and coal gangue (CG) as filling materials on the hydraulic properties and water content distribution in a profile for the purpose of rehabilitating subsided lands.
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Jul 14, 2022The dynamic sedation of the coal mine production is alternate or superimposed in coal rocks, which causes crack unevenness due to the presence of jacquards, causing unregistered coal blocks. By observing the deformation and fracture characteristics of coal-rock interbedding specimens with different gangue ratio under different stress paths, this paper studies the fracture instability mechanism ...
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Automatic Recognition of Coal and Gangue based on Convolution Neural Network. We designed a gangue sorting system,and built a convolutional neural network model based on AlexNet. Data enhancement and transfer learning are used to solve the problem which the convolution neural network has insufficient training data in the training stage. An ...
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In this paper, the coal gangue samples were activated at first, and then the coal gangue powder was modified by adding coal gangue powder to road asphalt with the ratio of 0.5 and 1.2, and the penetration, softening point and ductility of the modified asphalt were tested. The results show that the viscosity, strength and softening temperature ...
Get priceDec 20, 2021Therefore, to improve the recognition rate of coal gangue separation, a coal gangue recognition method based on improved Support Vector Machine is proposed in this paper. First, the images of the coal and gangue are preprocessed. Then, the gray and texture features of the coal and gangue are extracted from the preprocessed images.
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The results indicate that coal gangue waste can be efficiently treated at 850°C in less than 30min to obtain pozzolanic activity of 108% at 7 days and 124% at 28 days. And an industrial product also shows similar improvement in pozzolanic activity to the lab results, and indicates the potential for producing eco-efficient cementitious materials.
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Oct 1, 2020Coal gangue (CG) represents a huge amount of industrial solid waste in China, and usually is used as a coarse aggregate to produce low-strength coal-gangue-based concrete. In this paper, in order ...
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