The experimental results showed that coal gangue has a hierarchical structure, wide pore distribution, and poor mechanical properties in microcosmic. Compared with ordinary concrete (OC), both the fluidity and compressive strength of CGC were lower. However, due to the large porosity and water absorption of coal gangue, the bonding surface ...
2021-3-2 · Fang S, Xu L, Wu H, et al. Influence of surface dissolution on sodium oleate adsorption on ilmenite and its gangue minerals by ultrasonic treatment[J]. Applied Surface Science, 2019, 500:144038.
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2020-4-16 · Coal-gangue separation is an essential step in the coal preparation process. However, existing manual selection and mechanical separation methods require a large amount of labor, consume too much water, and involve health hazards. In this article, we solve this problem based on the near-infrared spectroscopy (NIRS) technique in tandem with improved broad learning. First, to remove …
A gangue in chemistry can be defined as an unwanted material or impurities in the form of sand, rock or any other material that surrounds the mineral in an ore deposit. This substance is common when it comes to the aspect of mining. Usually, gangue has to be separated from mineral and the process used is known as mineral dressing, mineral ...
1. Introduction. Coal gangue (CG) is an industrial solid waste which produced during the coal mining and washing process. The accumulative stockpile of CG has exceeded 5 billion tons in China, and the yield is still increasing at a rate of 300–350 million tons per year (Zhang et al., 2009).Large accumulation of CG not only takes up large quantities of land resources, but also causes serious ...
2011-3-18 · TGA and Dynamic Analysis about Mixture with Coal and Coal Gangue Hailiang Diao 1, Ruihua Liu2, Bo Lou, Fang Wang1 1 School of Electric Power, Guangzhou,China,510640 2Lianzhou power plant,Lianzhou,China,513400 Email: [email protected]
2018-2-12 · gangue [13,17]. After thermal activation at 700 ℃, the contents of Al. 2. O. 3. and SiO. 2 . in coal gangue increased to 92.31% and 64.44%, respectively [13]. After mechanical grinding, the specific surface area of coal gangue increased from 0.41 to 8.66 m. 2 /g [17]. Jabłońska . et al. [14] compared surface properties of different kinds of ...
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2021-8-16 · Fuel nitrogen conversion and release of nitrogen oxides during coal gangue calcination ： ： ：Environmental Science and Pollution Research ： ：24460 ：22 ：9 ：DOI 10.1007/s11356-014-3890-8 …
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2021-6-10 · The degree of relative compaction of mixed gangue is 1.226, which is significantly lower than that of washed gangue, which is 1.33. The deformation modulus of the mixed gangue is 23~135 MPa, which is better than that of washed gangue (26~100 MPa
When the thickness of soil layer, mixed size coal gangue layer and large size coal gangue layer were 53.42, 38.51, 90 cm respectively, the shortest outflow time was 145.129 s, the drainage capacity of simulated 2 m deep gully was the strongest in this mode.
· Do You Know Coal Gangue Processing Machines. The supply of coal gangue: Coal gangue would be the common term of solid waste materials coming from coal mine construction, coal production method widely typical in the construction, development diving, coal mining and coal washing process with exhaust carbon rock. Three aspects of coal gangue source.
To realize the resource utilization of gangue, the gangue was effectively recycled to prepare ceramic-based microwave absorbents. The synthesis process mainly involved the pelletizing of gangue, the loading of precursor solution and in situ carbothermal reduction. Furthermore, the obtained FeG composites were measured and characterized in terms of the phase composition, microstructure and ...
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To solve the problem of limited adsorption efficiency of pristine biochar for phosphate, a novel biochar composite was prepared from different feedstocks and coal gangue by one facile-step pyrolysis method. The effects of pyrolysis temperature, adsorbent dosage, pH of the solution, and coexisting io …
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Coal gangue is a harmful solid waste product of coal mining. When it accumulates for a long time, it becomes harmful to the surroundings. To investigate the adverse effect of coal gangue on the surrounding environment, this study investigated the effects of coal gangue and its downstream village on the growth toxicity and genotoxicity of barley at different dilution concentrations (1：27, 1 ...
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The research into the road performance of coal gangue is of great significance for the consumption of coal gangue and reducing pollution. In this paper, the coal gangues were prepared by separation and crushing processes, and their gradations were also optimized. Aiming to identify the possible problems of coal gangue as a pavement base, an unconfined compressive strength test, a splitting ...
2000-10-10 · The gangue hill has influenced the environments and people''s health around. In this paper, the features and the hazards of gangues were analyzed, then we give the methods of utilization of gangue in the Northeast of China,for example used as fuel of pulverized-coal boiler in gangue powder plant, the production of building materials, the chemical deep processing of gangue, ecological reclaim ...
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2020-3-1 · Understanding flotation mechanism of nonionic surfactants with different polarity on kaolinite as a gangue mineral: An experimental and simulation Minerals Engineering ( IF 4.765) Pub Date Bao Li, ng Guo, Boris Albijanic, Shengyu Liu, Lei Zhang, Xiaole Sun
2021-8-3 · The valuable components of alumina and silica in coal gangue mainly come from kaolinite. As shown in Fig. 2 [], kaolinite is a typical layered silicate material, belonging to the triclinic system.Kaolinite is connected by Al–O octahedrons and Si–O tetrahedrons through fixed-point oxygen, extends in the a-axis and b-axis directions, and also stacks in the c-axis direction.
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2020-2-20 · Facile preparation of zeolite-activated carbon composite from coal gangue with enhanced adsorption performance Chemical Engineering Journal ( IF 13.273) Pub Date : 2020-02-20, DOI: 10.1016/j.cej.2020.124513
This paper investigates the feasibility of using coal gangue as coarse and fine aggregates in concrete as well as how the coal gangue aggregate grading affects concrete properties. Nine mixed concrete samples were prepared with the value n in Fuller''s curve ranged ...
2021-5-30 · The replacement of coal gangue for aggregate in concrete can not only reduce the construction cost but also improve the environmental condition. The GFRP-coal gangue concrete-steel tubular (GGCS) columns provide a way to consume the coal gangue. The target of this work is to validate the feasibility of replacing ordinary concrete with coal gangue …
CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The separation for coal and gangue is an important process in mine production. In order to automatically select the gangue, this study obtained the difference and distribution regularity of the grayscale distribution by analyzing a large number of image data. By improving Bayesian Decision theory, identifiably ...
