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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 …
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, …
Process of filling goaf with coal gangue slurry. The process of filling goaf with coal gangue slurry is shown in Fig. 2.Specifically: the coal gangue is crushed by a multi-stage crusher and enters ...
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 …
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 …
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 % ...
Although the calcination-based activation of coal gangue is important for its valorization in the form of cementitious materials, the related works mainly focus on high-quality coal gangue, neglecting its low-quality counterpart. To bridge this gap, we herein conducted the pilot-scale suspension calcination of low-quality coal gangue; explored …
Coal gangue-slag geopolymer is a kind of environment-friendly material with excellent engineering performance and is formed from coal gangue and slag after excitation by an alkaline activator.
ABSTRACT. To accurately estimate the separation effects and breakage characteristics of coal and gangue particles (CGPs), it is of great significance to understand the meso-morphologies of CGPs and their …
First, the Aspen Plus software was used to optimize the coal gangue crushing system for the CFB boiler; it facilitated in predicting the PSD in with excellent accuracy, and optimized the PSD of ...
In the current research, a large number of studies have been carried out on the compressive macroscopic deformation characteristics of crushed gangue, and its …
The crushed coal gangue particles are widely used in solid backfilling. However, the non-uniform compaction and internal re-crushing behavior of crushed coal gangue under bearing-stress have not ...
It is suggested that coal gangue power plant mainly uses coal gangue with calorific value above 6.27 MJ kg −1 - 8.336 MJ kg −1 (1500 kcal kg −1 - 2000 kcal kg −1) (Wang, 2004a), and coal gangue with sulfur content exceeding 2% cannot be used for brick production. In addition, it is worth exploring the scientific combination of various ...
Coal Sizer is a professional coal crushing equipment, mainly used for crushing raw coal, coal gangue, coal coke and other materials. According to the crushing degree, coal sizers can be divided into one-stage …
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 …
The issue of gangue emissions accompanying coal production is one of the key factors currently hindering the green and efficient development of the coal industry 1,2.According to statistics, the ...
The selection of coal crushing equipment mainly depends on the input size of raw coal, the moisture of the coal, and the production scale (output) of the plant. ... After crushing, coal will produce a large amount of waste of coal gangue and dust. The coal gangue can be recycled.
Coal gangue, a solid waste of coal mining accounts for 15–20% of coal production, when directly discharged on the ground surface as waste heaps, it occupies …
Coal mining and washing is accompanied by the production of large amounts of coal gangue, which exerts a notable influence on the natural environment. However, …
1. Introduction. Coal gangue, a waste produced during coal mining, has been regarded as the largest source of industrial waste in China. It is estimated that the production of 1 t coal generates 0.1–0.25 t coal gangue [1], and the total stockpile of coal gangue exceeds 6 billion tons in China [2], [3].The coal gangue not only occupies …
DOI: 10.1016/J.POWTEC.2016.04.026 Corpus ID: 102279467; Compressive deformation and energy dissipation of crushed coal gangue @article{Zhou2016CompressiveDA, title={Compressive deformation and energy dissipation of crushed coal gangue}, author={Nan Zhou and Han Xiaole and Jixiong Zhang and Meng Li}, journal={Powder …
The application of coal gangue in construction materials faces challenges due to its inherent structural looseness, elevated porosity, and high carbon content. This study encapsulated coal gangue aggregates (CGAs) with a fly ash-cement slurry, varying the content of fly ash (0%, 10%, 20%, and 30%) and maintaining a water-to-cement ratio …
The compaction and re-crushing characteristics of crushed gangue are important factors which affect the quality and effectiveness of the filling of the quarry.
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 coal seams during the coal formation …
Coal gangue (CG) is one of the main solid wastes emitted by coal mining. It causes severe damage to the environment. CG contains high levels of valuable elements (Al, Si) and has the potential for utilization and clean disposal. Here, an environment-friendly process for separating valuable components from CG was proposed: the closed-loop …
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%.
Coal preparation plant: to lift coal from one processing stage to another, such as from crushing and screening area to washing or sorting area, to ensure a smooth and continuous flow of coal. 3.
The primary mechanical component of the equipment is a belt conveyor measuring 4.4 m in length, 1 m in width, and 2.3 m in height. The feeding port is 0.7 m long, the paving queuing module is 1.3 ...
As a by-product of coal production, coal gangue, if not handled properly, will pose an important hidden danger to the environment and safety. Using underground intelligent coal gangue sorting technology can increase efficiency, protect the environment, and enhance safety, which is essential for achieving efficient and eco-friendly coal …
Fully mechanized caving is the most popular method for safe and efficient coal mining in China. In this study, based on the geological and mining conditions of Workface 822 of the Yuandian No. 1 ...