Meanwhile, coal gangue recognition capability is summarized, which provides theoretical support for the vibration characteristics-based coal gangue recognition. Secondly, through analysis of fully mechanized caving environment, a single coal drawing experimental platform and vibration information acquisition system are designed and built in the ...
Re-concentration of tailings is one of the best ways to solve this problem, which requires a better understanding of flotationtailings. In the present ... distribution of gangue minerals in coal flotationtailing. Figure 3 shows the XRD patterns of coal flotationtailings with various size and density fractions. As shown in Figure 3a, the peaks ...
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 …
Possibility of cemented gangue backfill was studied with gangue of Suncun Coal Mine, Xinwen Coal Group, Shandong, and fly ash of nearby thermal power plant, in order to treat enormous coal gangue on a large scale and to recovery safety coal pillars. The results indicate that coal gangue is not an ideal aggregate for pipeline gravity flow …
Also, coal gangue can partially or entirely substitute clay as alumina adjustment in cement production. However, the utilization in different countries varies considerably and huge amounts of ...
In this study, two methods were proposed to increase the amount of calcium content in coal gangue geopolymer, i.e. GBFS and slaked lime, and calcined coal …
The kaolinit at about 984°C releases a large quantity of SiO 2, which makes calcine coal gangue more active than coal gangue itself. The relationship between the ratio Al 2 O 3 (mole) /SiO 2 (mole) and the components of coal gangue ash is analyzed, resulting in a formula to calculate the quantity of each phase. Applying the formula to the ...
ABSTRACT. Image-based separation of coal and gangue is susceptible to the external environment. This paper studies the effects of illuminance and external moisture on grayscale and texture features of coal and gangue images.
Coal gangue (CG) is an industrial residue when coal is excavated and washed in the production course of coal mine, and it has become the largest solid waste in China[1-4]. Metal tailing is an industrial waste for metal mine after mining, crushing, flotation. China is abundant in copper tailings (CT) and other metal tailings[5,6]. However, most ...
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.
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 …
To obtain the influence laws of the fine gangue rate on the properties of coal gangue cementitious paste, the slump, divergence, stratification, bleeding, setting time and mechanical strength with the change of fine gangue rate were studied on the basis of keeping the amount of cementing material and slurry concentration unchanged. The …
1. Introduction. Gangue minerals accounts for between 15% and 20% of raw coal in China (Qian et al., 2007).Indeed, as coal production has increased, so has gangue generation; by the end of 2009, the total amount of gangue produced added up to 5.0 × 10 9 t, encompassing 40% of the total Chinese solid waste (Miao and Qian, …
China is the world's largest coal mining country, coal reserves account for about 90% of China's mineral resources (Hailiang 2021).According to the National Bureau of Statistics of the People's Republic of China data, China produced 3.90 billion tons of coal in 2020, accounting for about 50.4% of global coal production (Yutao 2022).According to …
The thermal behavior of coal gangue selected from Zhungeer, Inner Mongolia Autonomous Region of China, was investigated by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, thermogravimetry (TG), derivative thermogravimetry (DTG), and scanning electron microscope (SEM). The XRD data …
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 …
1. Introduction. China's annual output of raw coal was about 3.5–4 billion tons, and the annual discharge of coal gangue, an industrial solid waste with a large discharge and low utilization rate, from coal mining and coal preparation was about 500–800 million tons [1], [2], [3], [4].Accumulation and landfills are common ways to …
In engineering, coal gangue is utilized for constructing roadbeds [1 [1] DING, F., "Experimental study on coal gangue filling for subgrade construction", Highway, v. 66, n. 2, pp. 69–75, 2021.] and as filler in reinforced earth retaining walls [2 [2] YANG, G., ZHANG, Z., DU, Y., et al., "Study of coal gangue composite reinforced ...
Coal gangue is the largest amount of industrial solid waste in China. It caused serious damage to the ecological environment and waste resources. Therefore, it is of great significance to realize the resource utilization of coal gangue, protecting the environment and realizing the sustainable development of society. This paper …
1. Introduction. Given its huge output and low degree of resource utilization, coal gangue is the main source of industrial solid waste in China, and it has a significant impact on the ecological environment and on mine safety [1,2].At present, China has invested a great deal of labor and material resources to deal with key scientific and technological problems, …
The existence of coal gangue seriously restricts coal selection rates and quality, so the separation of coal gangue is a vital step in coal production and is an important method of improving coal quality [1,2]. The existing coal gangue sorting methods have problems such as high labor intensity of workers, serious waste of water …
The problem of uneven illumination in the coal gangue image and the existence of fine coal gangue reduces the accuracy of the coal gangue location, which also makes it difficult to the annotation of the coal gangue images. ... The experimental results indicate that the improved U-Net model performs best among all evaluation …
Coal gangue, produced during coal mining and processing [1, 2], is one of the most extensively produced solid wastes in China [1, 3], accounting for approximately 10%‒20% of raw coal production [].The accumulation of coal gangue causes serious environmental, social, and economic problems in the coal mining area [].Heavy metals …
China is carrying out a large-scale energy bases in the early stages. Historical experience shows that a large number of coal gangue will be produce in the development of coal process. The coal gangue will occur environmental pollution when …
This paper investigated the feasibility of upcycling coal gangue fines (CGF), a secondary waste generated during the production of coal gangue aggregates, as the substitution of fly ash to prepare ...
Bauxite is an important strategic resource, and it is facing with the problem of balance between high demand of bauxite ore and low resource of bauxite reserves in China. This research takes the Fuxin coal gangue as the object and extracts Al 2 O 3 by medium-temperature calcinatio …
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 seam or …
Suspension calcination (a gas–solid system), a process recently applied to coal gangue activation, allows powders with particle sizes of ≤100 μm to be calcined in the form of a conveyor bed and offers …
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 …
DOI: 10.1016/j.conbuildmat.2022.127265 Corpus ID: 248457020; Deterioration mechanism of coal gangue concrete under the coupling action of bending load and freeze–thaw @article{Xiao2022DeteriorationMO, title={Deterioration mechanism of coal gangue concrete under the coupling action of bending load and freeze–thaw}, …
ABSTRACT. A greenhouse pot experiment was conducted to investigate the effect of application of coal gangue (CG) at different rates (0, 5, 10, 20, and 50%) and inoculation with two arbuscular mycorrhizal (AM) fungi Glomus intraradices and Glomus mosseae, as mediating plant adaptation to soil amended with CG, on the nutrient …
