— Coal gangue is a byproduct of coal mining and processing and according to incomplete statistics China has amassed a substantial coal gangue stockpile exceeding 2600 large mountains which poses a serious threat to the ecological environment Utilizing gangue as a coarse aggregate to produce gangue concrete GC presents a promising
Yêu cầu trực tuyến →— To address the lightweight and real time issues of coal sorting detection an intelligent detection method for coal and gangue Our v8 was proposed based on improved YOLOv8 Images of coal and gangue with different densities under two diverse lighting environments were collected Then the Laplacian image enhancement algorithm
Yêu cầu trực tuyến →— Early investigations on coal gangue detection were mainly focused on designing eigenvectors to reveal differentiation between coal and gangue; these were based on image processing gray
Yêu cầu trực tuyến →— Coal 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 reactive powder concrete RPC with coal
Yêu cầu trực tuyến →— 1 Coal gangue can be used as a raw material to produce porous geopolymers cement based porous materials porous bricks and other materials by virtue of its volcanic ash
Yêu cầu trực tuyến →— The results show that a cement content of 4% is optimal for the cement stabilized coal gangue which can be used for the light traffic base and heavy traffic subbase of class II and below highways
Yêu cầu trực tuyến →— Coal gangue as an associated product of coal mining can cause a large number of piles to undergo slow oxidation and spontaneous combustion resulting in the production of toxic and harmful gases leading to casualties environmental damage and economic losses Gel foam has been extensively employed as a fire retardant material in
— Physicochemical properties of coal gangue sand The coal gangue was collected from Fuxin City Liaoning Province China The coal gangue sand was obtained after crushing the large particles of gangue which was screened according to the Chinese standard "Sand for Construction" GB/T 14684 2022 Sand for construction Fig 3
Yêu cầu trực tuyến →— 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
Yêu cầu trực tuyến →— 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
Yêu cầu trực tuyến →— The following reactions occurred at 550 °C in the coal gangue Al 2 O 3 ·2SiO 2 ·H 2 O→Al 2 O 3 ·2SiO 2 2H 2 O This reaction contributed to a change in the coal gangue microstructure [19] From Fig a and f can see that the surface of the coal gangue char is presented as a block structure the surface of which has a little number
Yêu cầu trực tuyến →— Coal gangue as a subgrade filler is of great significance for the sustainable development of the economy society and environment Particle crushing tests were conducted on coal gangue coarse grained subgrade filler CGSF under uniaxial compression conditions and the relationships between load and displacement crushing
Yêu cầu trực tuyến →— Along with the excavation and washing of coal in the production process large amounts of rock like coal gangue CG accompanying the carboniferous beds are discharged as industrial residues accounting for around 10 20% of the coal production [2 3 4] In the largest coal production country namely China more than 700 million tons of
— The calorific value of coal gangue refers to the amount of energy that can be released from complete combustion of coal gangue per unit mass under certain conditions and it usually increases with increasing carbon mass fraction and volatile fraction and decreases with increasing ash fraction [24] The meltability of coal gangue refers to the
Yêu cầu trực tuyến →Chúng tôi đánh giá cao phản hồi của bạn! Vui lòng điền vào mẫu dưới đây để chúng tôi có thể điều chỉnh dịch vụ theo nhu cầu cụ thể của bạn.