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 ...
Abstract. Among coal mining-related wastes, coal gangue (CG) is the heterogeneous waste generated during the mineral processing or coal washing phase …
The gangue is wrapped by slurry in underground coal mine, which causes difficult coal-gangue recognition and sorting. The underground working space is narrow, so the equipment layout is difficult, and the diversion of coal-gangue is difficult. Therefore, developing a high-performance, highly reliable intelligent coal-gangue sorting robot is …
Xiangang et al. proposed a coal gangue recognition method driven by deep learning that is based on the differences in the surface characteristics of coal gangue; they also studied the coal gangue location method based on binocular stereo vision, which effectively improves the accuracy of coal gangue identification and location .
Solid-liquid separation in the coal processing circuits is achieved by employing different dewatering equipment such as high-frequency screens, centrifuges, thickeners, and filters. Different aspects of the listed equipment typically utilized in the coal processing circuits are discussed in the subsequent section. 1.3.1 Sizing Devices
Coal mining is accompanied by the discharge of solid waste such as coal gangue and the control of mining pressure and surface subsidence.Promoting the green development of coal mines will be an ...
Coal washing is an industrial process that removes impurities from raw coal, or classifies high-quality coal and low-quality coal. The products produced after the coal washing process are generally divided into gangue, medium coal, grade B clean coal, and grade A clean coal. The finished coal after the coal washing process is usually called ...
Conventional coal gangue separation equipment, such as spiral separation equipment, heavy medium shallow trough separation equipment, and TBS interference bed separation equipment have the advantages of mature technology, high separation …
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 disposal and environmental pollution issues. Over the past few decades, there has been …
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 …
Despite various proposed algorithms predicated upon convolution neural networks to deal with coal–gangue detection under complex production, applying Transformer into the coal–gangue detection network has been rarely executed so far. Here, a lightweight CNN- and Transformer-based coal–gangue detection network is …
And combined with the attention mechanism module of ECANet (Efficient Channel Attention Networks). 490 sets of multispectral data were obtained through the multispectral data acquisition system, and 980 original samples of coal and gangue were obtained, the original samples are preprocessed by histogram equalization to establish …
It solves the problems of weak spheroidization of iron tailings and difficult expansion of coal gangue. CGC production process: 1 Coal gangue is crushed by a jaw crusher and ground by a ball mill. Raw materials are screened using a 100-mesh vibrating screen. 2 Mix raw materials (55% coal gangue and 45% iron tailings) to make particles …
The coal industry is an important pillar industry of economic development in China, with coal mining produced a lot of coal gangue, which is occupied land, and pollution of the environment, and the production and life of coal-producing areas have been seriously affected, coal gangue has become a heavy burden restricting the sustainable …
During the extraction and processing of coal, a large amount of solid waste, collectively known as gangue, is produced. This gangue has a low carbon content but a high ash content, accounting for approximately 15 to 20% of the total coal yield. Before coal is used, coal and gangue must be effectively separated to reduce the gangue …
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, …
In this paper, coal gangue light ceramsite was prepared by using coal gangue from Qinghai Reshui coal mine as raw material and sodium carbonate as auxiliary material. The optimized process conditions are as follows: the mass ratio coal of gangue and sodium carbonate = 50:1 (10% hydrochloric acid contamination); the drying …
Selected type coal washing plant with annual washing capacity of 1 million tons: Combination of screening and crushing, numerical control fine washing and recycling, …
Coal Gangue Pulverizer Raymond Mill Finished product fineness: 80-325 mesh Production capacity: 1.5-100t/h It is suitable for the processing of more than 300 kinds of high-fine powder materials in non-flammable and explosive mineral, chemical, construction and other industries with Mohs hardness not greater than 7 and humidity …
This paper proposes a modified YOLOv4 model, named GYOLO, for coal gangue recognition with the aim of reducing model parameters, improving calculation speed, and reducing equipment requirements. To achieve this, the paper optimizes the feature extraction network structure by using linear operation instead of traditional …
As one of the major energy sources in many countries [1, 2], the consumption rate of coal resources is very high, which has a great impact on the economy [3, 4].As the accompanying product of coal, the quantity of gangue is also increasing, which seriously affects [] the utilization of coal, coal mine safety and the ecological …
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 …
In this paper, an image processing and recognition system of the coal and gangue has been studied, which is made up by the chip DM6437 and some peripheral auxiliary equipment.
Among the fossil fuels, coal is a primary contributor to global GHG with substantial emissions generated during its mining and combustion process. Coal …
A modified YOLOv4 model, named GYOLO, for coal gangue recognition is proposed with the aim of reducing model parameters, improving calculation speed, and reducing equipment requirements. This paper proposes a modified YOLOv4 model, named GYOLO, for coal gangue recognition with the aim of reducing model parameters, …
An improved tiny-YOLO-v3-based fast identification model is proposed in this paper, which including the spatial pyramid pooling (SPP) net, the squeeze-and-excitation (SE) module and the dilated convolution is used to further optimize and realize the fast identification of coal and gangue. In the process of coal mining, the coal quality is …
Against the backdrop of achieving the goals of "peak carbon emissions and carbon neutrality", coal, as the cornerstone of national energy security, plays a crucial role in the green development of our country's economic construction and social development. However, during the process of coal mining and washing, coal gangue, as the primary …
Efficient and thorough treatment of dye wastewater is essential to achieve ecological harmony. In this study, a new type of calcium-based modified coal gangue (Ca-CG) was prepared by using solid waste coal gangue as raw material and a CaCl2 modifier, which was used for the removal of malachite green, methylene blue, crystal violet, …
The recognition and sorting of coal and gangue are an important part of the process of reducing costs and improving production efficiency. In this paper, under the influence of long running pollution and similar background grayscale, a new method was proposed based on image process and multilayer perceptron.
Lithium extraction from the coal gangue was systematically investigated via the integrated process of roasting and acid leaching with the mechanism analysis. The majority (94%) of lithium was extracted when raw samples are roasted at 400°C for 20 min before 4 h leaching with 2 mol/L hydrochloric acid at 60°C, which represented the …