Experimental Study on Nonuniform Compaction and Re-Crushing …
2) The AE location and variation of AE intensity show that there are non-uniform compaction and layered re-crushing phenomenon in the compaction process of crushed coal gangue. The particle re ...
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The breaking process for coal gangue with …
Context 1. ... gangue has a certain hardness [20]; however, it needs to be crushed to use as aggregate because of its large size. Figure 5 shows the breaking process for coal gangue with a...
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Experimental Study on Crushing Characteristic of Coal and Gangue …
Experimental results showed that crushing ratios of coal and gangue decreased with the increase of particle size and impact velocity. As the impact velocity was between 5 m/s-8 m/s and the initial ...
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Coal Gangue Crushing and Screening
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 Al2O3 and SIO2. In addition, it contains various amounts of Fe2O3, Cao, MgO, Na2O, K2o, P2O5, SO3 and traces rare elements …
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ReviewComprehensive utilization and environmental risks of …
Coal gangue with a high carbon content (>20%) is commonly used for power generation and heating. Coal gangue has a low carbon content (<4% or 4%–6%) can be …
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Reactivity activation of waste coal gangue and its impact …
In the construction field, coal gangue has also been used to make bricks, concrete blocks, mosaics, fired-glazed floor tiles, lightweight aggregate and other low value-added building materials [8], [16], [17].At present, coal gangue can partly or completely replace clay for aluminum adjustment in cement clinker production [18], [19]. In fact, the …
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Optimization of particle size distribution in circulating fluidized
Optimization of crushing system of coal gangue by using Aspen Plus software. • Two-toothed roll crusher was found to be the most significant and vulnerable part in the crushing system arrangement. • The appearance function in the Whiten model was extended to the coal gangue. • The optimized PSD improved the combustion …
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Influence of coal gangue mulching with various thicknesses …
Coal gangue, as a type of solid waste discharged during coal mining and coal washing, occupies a large amount of land resources owing to accumulated gangue, which eventually results in ecological ...
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Which Crusher is Better for Coal Gangue Crushing?
. Which Crusher is Better for Coal Gangue Crushing? Coal gangue is a solid waste discharged from the coal mining process and coal washing process. Coal gangue …
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Coal Gangue
China Coal Gangue wholesale - Select 2024 high quality Coal Gangue products in best price from certified Chinese Crusher manufacturers, Brick Making Machine suppliers, wholesalers and factory on Made-in-China ... PE-900X1200 Coal Gangue Crusher, Dolomite Limestone Sand Making Equipment, Marble Blue Stone Jaw Crusher US$ …
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Case Study of Cemented Coal Gangue-Fly Ash Backfill
The technology of cemented coal gangue-fly ash backfill (CGFB, mixture of binder, coal gangue, fly ash, water and additive if necessary) is introduced and utilized in this mine to dispose both waste and gob. Based on rheology, loop, and UCS (uniaxial compressive strength) tests, the optimum mix proportion and solid concentration for …
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Comprehensive utilization and environmental risks of coal …
Coal gangue, a solid waste generated during coal mining and washing, accounts for approximately 10%–15% of the total coal production. The accumulative …
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Utilization of coal gangue sand in structural concrete as fine
Coal gangue is the main tailings of coal mine, accounting for about 10% ∼ 20% of coal production. At present, China is the largest coal production country reaching 5 billion tons, rising at an annual rate of 150 million ∼ 200 million tons [1], [2].In recent years, the average annual consumption of concrete in China has exceeded 436 million tons, and …
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New type of jaw crusher is used in crushing coal gangue
As well known, coal as main energy in our country, it plays an important role in the socio-economic development .Development and utilization of coal plays a huge role in promoting the social economy, at the same time also has a significant influence on the environment.Coal gangue and coal bed methane are the main waste in the process of …
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Alkali-activated geopolymer materials prepared from coal gangue …
The accumulation of coal gangue not only occupies a vast amount of land but also poses a serious threat to the ecological environment [19, 20]. However, coal gangue contains abundant aluminosilicate components, such as Al 2 O 3 and SiO 2, which have the potential to be used as raw materials for alkali-activated cementitious materials [[21], [22 ...
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Technology and engineering test of filling goaf with coal gangue …
The ratio of gangue slurry is coal gangue to mine water = 7:3, and the mass fraction of gangue slurry is 70%. The grouting pump used in this experiment is a plunger pump, with a maximum ...
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Using Chinese Coal Gangue as an Ecological Aggregate and …
This paper reviews the properties and preparation methods of Chinese gangue aggregate, studies the influence of gangue aggregate on concrete properties …
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Excess sulfur and Fe elements drive changes in soil and
After studying the impact of a gully-type coal gangue dump in the Daliuta mine area of Shaanxi, China, Liu 22 suggested that covering coal gangues with a 30 cm-thick loess layer and planting ...
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Compaction characteristics and energy dissipation of crushed gangue …
The coal gangue samples were collected 15 times and approximately 50 kg each time from the waste dump in the Renjiazhuang coal mine, as shown in Fig. 3a, which is located in Ningxia Hui autonomous region, China. To solve the problems of the massive accumulation of coal gangue, strong ground pressure and serious subsidence in the …
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The breaking process for coal gangue with …
Yaben Guo. 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 ...
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Recent Patents on Roll Crushing Mills for Selective Crushing of Coal
The results were applied in optimizing an industrial-scale crushing system and two-toothed roll crusher of a coal gangue-fired power plant. Investigations demonstrated that the PSD can improve the ...
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Coal Gangue Crusher
Coal gangue crusher is an important equipment for the utilization of coal gangue. It has the advantages of large crushing ratio, uniform particle size, low noise, and low dust. It can be widely used in building materials, chemical industry, metallurgy, coal mining, and other industries. With the continuous development of the coal industry, the ...
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Introduction of Coal Gangue
Gangue, also called coal gangue, is the solid waste discharged in coal mining process and coal washing process, black rock harder than coal. Its carbon content is low and exists along with coal seam. Gangue could be found in roof, bottom board, inter-layer, and it could be selected in washing process. The main ingredient are Al2O3, SiO2, Fe2O3 ...
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(PDF) Underground Disposal of Coal Gangue Backfill in …
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 ...
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Double Roll Crusher for Cement, Coke, Coal Gangue
The coal gangue crusher uses dual rotors to crush up and down in two stages. This equipment is a two-stage crusher. After a series of optimizations and improvements, the crushing effect of this equipment is very ideal. Application : This machine is mainly used for coal, coal stone, steel slag, limestone, coke, galena, limonite, etc.
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Preventing water inrush hazards in coal mines by coal gangue …
Test schemes. Considering that the depth of coal seams in most of the Chinese backfill mining coal mines is less than 400 m (Cao et al. 2017; Ju et al. 2012), which means that the vertical hydrostatic stress at this depth is about 10 MPa, thus the maximum stress level in this test was designed to be 10 MPa.Based on the cross …
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Full article: A review of intelligent coal gangue separation …
In Fig. 1, the mined raw coal is transported by tram to the screening workshop, where the screened product is then placed in a fine ore bin.The product on the screen is crushed by a jaw crusher to a qualified particle size and then deposited in a buffer ore bin. The raw coal is then conveyed to the ore feeder through the bucket feeder and …
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Coal Gangue: Composition, Processing, Use And Recycling
Coal gangue power generation Coal gangue grinding adopts fluidized bed technology. When the carbon content is greater than 20%, it can be used as energy and can be used to generate electricity. Recycling of coal and pyrite Coal gangue adopts composite dry coal preparation, cyclone, and heavy medium separation. When the coal content …
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Coal Gangue Crusher
Coal Gangue Crusher, Find Details and Price about Vertical Compound Crusher Quarry Crusher from Coal Gangue Crusher - Zhengzhou Shisheng Machinery Co., Ltd.
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