Coal gangue is an industrial solid waste inevitably produced in coal mining and coal washing, and its emissions account for approximately 10%–15% of coal production (Zhou et al. 2014a, b).China is the country with the highest coal production in the world, and a large amount of coal gangue waste is piled on the surface at mining …
Coal gangue is the main solid waste in coal mining areas, and its annual emissions account for about 10% of coal production. The composition information of coal gangue is the basis of reasonable utilization of coal gangue, and according to the composition information of coal gangue, one can choose the appropriate application …
Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications. Producing concrete with coal gangue aggregate is one of the green sustainable development requirements. This paper reviews the properties and preparation methods of Chinese gangue aggregate, studies the influence of gangue …
In this paper, the physical, chemical and pollution characteristics of coal gangue are summarized, and the ecological restoration mode is divided into two modes: …
Coal gangue is one of China's main industrial solid wastes, which contains various harmful heavy metal elements, such as lead (Pb). The long-term accumulation of coal gangue causes Pb to migrate to the surrounding environment due to weathering and rain erosion, eventually endangering human life and health with its continuous …
Coal gangue has become one of the industrial wastes with the largest annual discharge and accumulated stock in China. The disorderly accumulation of coal gangue not only occupies a large amount of land resources and causes natural disasters, but also pollutes the surrounding ecological environment, which in turn affects human …
In this study, the research aim is to enhance the activity index of activated coal gangue and study its activation mechanism. The activation process of coal gangue was optimized through orthogonal tests, and the Back-Propagation (BP) neural network model was improved using a genetic algorithm. With the effects of grinding duration, …
For coal and gangue, intelligent sorting processes for separation, the use of coal and gangue mineral components with different fundamental differences, and the study of different properties of minerals and coal with different scales and density regarding the gray value change law are presented. The results show that the gray value of single …
Case I. CFA of coal gangue application in earthworks. The potential environmental impacts envisaged with utilization of CG in geotechnical engineering applications are evaluated by performing CFA on its application as a fill material in highway embankment. For the present study, the extension of Karimnagar-Ramagundam …
1. Introduction. Coal gangue is one of the largest industrial residues in China that is discharged during the processing and utilization of coal (Gu, 1997, Liu and Liu, 2010).With continuous growth of coal mining and coal cleaning, a large amount of coal gangue are produced, which contain sulfide minerals, alumino-silicates minerals, other …
Coal gangue is a rock mixed with organic and inorganic compounds co-deposited with coal during coal formation. Usually in a thin layer and in the coal …
Among the fossil fuels, coal is a primary contributor to global GHG with substantial emissions generated during its mining and combustion process. Coal …
The amount of coal gangue, a by-product of coal mining and washing, is rapidly increasing with the growing trend of energy consumption. The accumulated coal gangue without appropriate utilization has resulted in a squander of resources, waste …
Global rise in greenhouse gas emissions (GHG) is triggered mainly due to the consumption of fossil fuels for power generation and domestic usage. Among the fossil fuels, coal is a primary contributor to global GHG with substantial emissions generated during its mining and combustion process. Coal gangue, a residue produced during the …
Coal gangue, a by-product produced during the coal processing, has a serious impact on the environment. Using coal gangue as a fertilizer has been proven helpful in potentially reducing its environmental impact and improving its value. In this study, the formation mechanism and influencing factors of coal-gangue-based silicon fertilizer …
1. Introduction. Coal gangue is a solid waste discharged during coal mining and washing, and many accumulated coal gangue has caused severe damage to the environment and ecology [1].After a long time of accumulation, the structure of gangue mountain becomes loose, which can easily cause natural disasters such as mudslides …
1. Introduction. Coal is an important energy material [1] and chemical raw material [2, 3] for human beings, which makes it mined in large quantities every year.In the process of coal mining, coal gangue is inevitably mixed into raw coal, accounting for more than 10% [4].The vast majority of solid waste in China comes from coal mining [5].The …
Coal gangue is an industrial residue that is discharged in the course of coal exploitation, processing, and electricity generation.
Coal gangue is one of the industrial solid wastes that may harm the human body through the ecosystem for a long time. Using coal gangue in geopolymer preparation can effectively reduce cement output and meet the sustainability requirements. In this paper, the physical and chemical characteristics, including the heavy metal content, 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 …
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.
Among coal mining-related wastes, coal gangue (CG) is the heterogeneous waste generated during the mineral processing or coal washing phase of coal mining. A …
This study was conducted at the Suntuan coal mine in the Huaibei mining area, located at 33°33′49.5072″ N and 116°46′3.3852″ E. The coal gangue used in this study was obtained from the Suntuan coal mine and crushed to a size less than 5 mm, with particles below 2 mm, accounting for approximately 70%.
Coal gangue (CG), an industrial solid waste with high contents of Li and Ga, has attracted the attention of researchers. However, the utilization of CG remains an economic challenge. Pre-enrichment of Li and Ga by flotation was carried out with a view to improving the comprehensive utilization of CG. Mineral composition, time-of-flight …
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. Starting from the resource …
To address the technical limitations of automatic coal and gangue detection technology in fully mechanized top coal caving mining operations, the low radiation level radioactivity measurement ...
1. Introduction. As a significant energy source in the world, coal accounting for more than 27% of the primary energy structure [1], [2], and is widely employed in daily production and life.Gangue is a low-carbon solid waste produced during coal mining and washing, accounting for about 10%−15% of the total coal output [3].The cumulative …
Using the coal gangue detection and recognition device built in the laboratory, the trained SSD, YOLOv3,YOLOv4, YOLOv5 and DCN-YOLOv3 algorithm network models were adopted to detect coal gangue. Figure 10 shows the effect of the detection of coal and gangue of three different sizes: 4–6, 6–8 and 10–12 cm. The SSD …
Gangue refers to waste rock discharged during coal mine construction, coal mining, etc 1.Excessive accumulation of coal gangue will cause serious environmental problems 2,3,4.At present, the coal ...
Coal gangue, a solid waste generated during coal mining and washing, accounts for approximately 10%–15% of the total coal production. The accumulative …
Recognizing and distinguishing coal and gangue are essential in engineering, such as in coal-fired power plants. This paper employed a convolutional neural network (CNN) to recognize coal and gangue images and help segregate coal and gangue. A typical workflow for CNN image recognition is presented as well as a strategy …
With the long-term sustained development of coal resources, the continuous underground coal mining activities have caused surface subsidence and accumulation of coal gangue waste, which has ...
1. Introduction. Coal mine waste has become a major environmental problem around the world, especially in countries that use coal as the main energy source [1].Coal gangue is an industrial solid waste produced during the process of coal mining; its annual output is equivalent to 10%–15% of coal output, and it has become one of the …
Abstract Coal gangue was the rock associated with coal mining. The combustion efficiency of coal gangue in thermal power plants was limited by its low calorific value and incombustibility. In this paper, coal gangue was made into particles of about 2–10 mm, and its isothermal pyrolysis characteristics under the N2 atmosphere …