ABSTRACT In order to analyze crushing characteristics of coal and gangue and its influence on separation effect, impact crushing experiments for coal and gangue were conducted. Crushing characteristics of coal and gangue under impact load were expressed by crushing ratio and crushing probability. Experimental results showed …
WEBJanuary 18, 2024. Coal gangue is a fixed coal mining, washing, and processing product. It is a black-gray rock with lower carbon content and harder than coal associated with …
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 …
During mining, processing and utilization of coal, the environment is exposed to piles of coal, coal gangue and coal ash, which have human health concerns. Coal and coal gangue samples were obtained from a coal mining company located in Southern Province, Sinazongwe District, Zambia. The main objective of this research was to …
Gangue is the concomitant product of coal mining. The traditional approach for gangue treatment is to transport it from underground to ground level to accumulate and form gangue hills. On the basis of summarizing previous research results, this paper introduces the hydraulic roller crusher and the electric machine built-in coal gangue …
To elucidate the effects of long-term (20 years) afforestation with different woody plant species on the soil microenvironment in coal gangue polymetallic contaminated areas. This study analyzed the soil physicochemical properties, soil enzyme activities, soil ionophore, bacterial community structure, soil metabolite, and their …
The coal gangue hammer crusher are mainly based on impact energy to complete the work of broken materials. Hammer crusher work, the motor drives the rotor for high …
Crushers Coal Capacitycrushers Coal Gangue. which crusher is used in coal mine crushing lump coal,hammer coal crusher machine has advantages of high production capacity and slag, building materials waste, coal gangue, coal and other medium hardness .coal crusher machinery,coal crusher machine prices in india portable crusher plant …
Heshan, a city in Southwest China, has been built over an old coal mining area. Due to low level of reclamation, coal gangue had been stacked in large heaps and caused geological environmental problems. To facilitate designing management project of coal gangue, we made an investigation of the largest coal gangue heap in Dongkuang …
Results showed that after calcining with mineral powders, the crushing rate of coal gangue decreased from 16.8 % to 16.1–13.2 %, and water absorption decreased from 5.29 % to 2.74–3.90 % ...
The composition of the coal gangue varies with the geology of the site. For example, one could compare the compositions (of studied samples) in Morocco to those of other countries like Spain [17 ...
The mode of crushing coal gangue into grouting material has been explored in the aspects of coal mining subsidence area treatment, and building foundation reinforcement [64, 66]. From a carbon perspective, the major input is the energy consumption in the process of coal gangue crushing, disposal, and transportation of …
In solid backfilling coal mining (SBCM), the deformation resistance of crushed gangue particle material (CGPM) is critical for controlling overburden strata movement and ground surface subsidence.In engineering practice, CGPM is generally circularly compacted first by the compaction machine to reduce its compressibility.However, a systematic …
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 …
HPC Cone Crusher. ZYM Ultrafine Powder Mill. Cases. River Stone Crushing Plant. Basalt Stone Crushing Plant. Granite Stone Crushing Plant. 300TPH Granite Crushing Plant …
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, …
However, the complex composition of coal gangue has been proven to be the main reason hindering its efficient comprehensive utilization. Coal gangue contains a variety of trace heavy metal ...
The crushed coal gangue particles are widely used in solid backfilling. However, the nonuniform compaction and internal re-crushing behavior of crushed coal gangue under bearing stress have not yet been revealed in current research. But this is particularly significant for improving the filling effect and quality. In this article, with the aid of the …
2. In situ construction methods of the coal gangue roadbed are provided. 3. Coal gangue roadbed protecting concrete (CGRPC) with coal gangue aggregate can effectively protect the roadbed from ...
628 B. Hui et al. 3. Construction of the elastic-plastic model of s porous media coal gangue subgrade The coal gangue subgrade has characteristics of high porosity and particle break-age.
The same situation was also found in coal gangue-fired power plant, three most abundant VOCs species, 1-Butene, Ethylene and Isoprene, had about 73.26% contributions of the total ozone formation, while the group of alkenes contributed about 76.90% to the ozone formation. It should be noticed that due to the high concentrations …
China's total coal production in 2021 exceeded 4.13 billion tons, 52% of the world's total. Coal gangue, a solid waste of coal mining accounts for 15–20% of coal production, when directly ...
1. Jaw crusher. As a kind of coarse crushing equipment, it is generally used in the first crushing procedure. The characteristics of a jaw crusher are strong crushing capacity, strong and durable, and a …
In the process of excavation and utilization of the coal gangue hill, gangue at different weathering degree was exposed to the environment, which can be harmful to the surroundings. In order to find the law of heavy metal release and to evaluate the potential ecological risk, five kinds of coal gangue at different weathering degrees were collected …
coal-gangue-based silicon fertilizer, and its reliability veri-ed, thereby providing a theoretical basis for use of coal-gangue-based silicon fertilizer in agriculture. Materials and methods Materials Coal gangue The coal gangue used in the experiment comes from the Shendong mining area in Inner Mongolia, China, with an ash content of~ 85.60%.
The backfilling mining method that fills gobs with coal gangue can prevent water inrush hazards, protect groundwater resources, and protect the ecological environment of the mining area. However, initial conditions including the particle size distribution of gangue and the stress environment may affect the seepage …
Coal Gangue Meaning. Coal Gangue is a kind of solid waste discharged from coal mining and coal washing. It is also a kind of black-gray rock with lower carbon content and harder than coal. Its main components are …
Coal mining is indispensable due to the widespread use of coal, and gangue is the accumulated solid waste byproduct that persists in mined lands, even after the mines have been abandoned 1.In the ...
Results Both of these crushers can be used in selective crushing technology of coal gangue in a coal mine and can meet the requirements of crushing different material sizes and generally avoid the ...
The coal gangue dump may introduce heavy metal(oid)s (HMs) into surrounding agricultural soils, posing potential health risks to nearby communities. This study evaluated heavy metal(oid) pollution ...
The content of rare earth elements in gangue (324.28 μg/g) is much higher than that in coal (66.22 μg/g). The rare earth elements (REY) content in the coal in the Shanxi Formation (93.88 μg/g) is slightly higher than that in the Taiyuan Formation (66.19 μg/g). The mean values of δEu and δCe are 0.71 and 0.94, respectively.
Coal gangue and y ash are mostly composed of SiO2 and Al2O3, and the content of other components was slightly dierent. Large pieces of coal gangue were bro-ken with the crusher; the four particle sizes required for the test were screened by a standard vibrating sieve and then mixed with dierent concentrations of coal y ash. Among them, the ...
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 …
China is a major coal-producing country, with a national raw coal production of 4.56 billion tons in 2022 (Wang et al. 2019; Jiang 2022; Dewulf et al. 2022).The continuous development of coal resources, while supporting socio-economic development, will generate a large amount of solid waste, such as gangue (Eshaq et al. 2020; Carlos …
Online intelligent recognition of coal and gangue is an important aspect of coal mine intelligent development. Current research focuses more on improving recognition accuracy through optimizing image processing algorithms, but there is limited research on the characteristics of coal gangue materials themselves, particularly the comparative …
Appl. Sci. 2022, 12, 12060 3 of 18 ble is limited [41]. More than 35% of coal gangue still exists in the form of waste heaps [42]. Given the huge annual production of coal gangue in China, the ...
Coal gangue is a common industrial solid waste produced during coal mining and processing. With the continuous development of the coal industry, the accumulation of …
According to the conclusion of the above simulation study, in the coal gangue filling, the particle size of the filling gangue should be moderate, small particle size gangue crushing cost is high ...
The use of coal gangue fertilizer is mainly based on the fact that coal gangue contains rich organic carbon, and the organic matter content in the soil can be greatly increased after being applied to the …
The quantity of gangue present in raw coal during coal production has an impact on coal quality and affects the environment. Coal and gangue separation may enhance coal quality, conserve energy, cut down on usage, and make wise use of resources. Because they require little in the way of complex machinery, are effective, and do not pollute the …