gangue processing for sale

Low-carbon utilization of coal gangue under the carbon

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 …

Eco-friendly treatment of coal gangue for its utilization as

Using coal gangue (CG) as ... CG is a residue produced from the processing of coal mining and coal washing. It has been estimated that CG accounts for about 10–15% of raw coal production (Qureshi et al., 2020). ... (as shown in Eq.(1), (2), (3))) (Rongkun Pan, Ligang Zheng, Hailin Jia, Gang Ma1, 2015). The emission of these …

Gangue processed into building sand

Gangue in coal mining, coal washing process emissions from solid waste, coal gangue in most cases are treated as industrial waste, in recent years, affected by a variety of …

Application of Coal Gangue as a Coarse Aggregate in Green …

Along with the excavation and washing of coal in the production process, large amounts of rock-like coal gangue (CG) accompanying the carboniferous beds are discharged as industrial residues, accounting for around 10–20% of the coal production [2,3,4].In the largest coal production country, namely China, more than 700 million tons of …

Strain softening and brittleness characteristics of gangue-containing

Abstract Due to differences in the properties of coal and gangue, gangue-containing coal often exhibits complex damage characteristics, which has become a key factor limiting the recovery rate in top coal caving. In order to improve the efficiency of top coal caving, it is necessary to recognize the failure mechanism of gangue-containing …

Gangue Crushing,Gangue Crusher Plant,Gangue Crusher …

GANGUE CRUSHING & PROCESSING. Gangue crusher replaces the earlier single-stage crusher with sieve bottom and perfectly solve the difficult issues for crushing humidity of …

Accurate measurement and quantitative analysis of 3D shape

1. Introduction. Coal is the basic energy in China and an important guarantee for economic development. However, the long-term high yield of coal resources leads to the excessive accumulation of coal gangue on the ground [1], [2], [3].According to statistical data, China has more than 1,600 gangue piles at present, and cumulative accumulation …

A Simplified Model for SO2 Generation during Spontaneous …

DOI: 10.32604/EE.2021.015413. ARTICLE. A Simplified Model for SO 2 Generation during Spontaneous Combustion of Coal Gangue. Ang Li 1, 2, Peng Lei 1, *, Changkun Chen 1 and Tong Xu 1. 1 Institute of Disaster Prevention Science and Safety Technology, Central South University, Changsha, 410075, China 2 College of Forestry, Inner Mongolia Agricultural …

Manure Handling For Sale | TractorHouse

HOME > MANURE HANDLING FOR SALE. About Manure Handling Equipment. Manure handling equipment for sale includes manure spreaders, manure …

Compression of Aggregates of Acid-Leached Coal Gangues

2.4. Experimental Procedures (1) All the samples together weighing 3.5 kg of coal gangue samples with different particle sizes were weighed and were placed in a high-capacity plastic drum (material: polyethylene); then, they were grouped and numbered. Deionized water or a prepared solution (pH = 3 or 5) was then added to the coal gangues …

Image feature extraction and recognition model

Image feature extraction and recognition model construction of coal and gangue based on image processing technology. ...

Gangue

Gangue - Mining Fundamentals. Gangue refers to substances that are extracted along with desired minerals or ores due to their close association, and are considered commercially …

Identification of coal and gangue based on R value method …

Further, the process of X-ray irradiation of coal and gangue is transformed into CT images for visualization. The CT images of coal and gangue with a thickness of 7 mm under low, medium and high-energy conditions are as shown in Fig. 18: Download : Download high-res image (198KB) Download : Download full-size image; Fig. 17.

Separating coal and gangue using three-dimensional laser scanning

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, 2009). The …

Upgrading Low-Grade Iron Ore through Gangue Removal by …

Removal of Gangue Component during Hydrothermal Treatment with NaOH. Table 1 shows the chemical composition, pore properties, and iron forms of the iron ore used in this study. Table 2 summarizes the yield, gangue removal extent, pore properties, and Fe forms in the iron ores treated with a hydrothermal method using 5 M NaOH at 300 °C. 25 …

Underground Disposal of Coal Gangue Backfill in China

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 discharged on the ground surface as waste heaps, it occupies large areas of land and cause environmental pollution. This paper summarizes the …

Experimental Investigation on the Grading

Before and after the fragmentation of the gangue, the density of the gangue particles (d > 100 mm) and the gangue fragments were measured using an electronic balance and a measuring cylinder. The 10 sets of measurement results showed that the density of the gangue particles before fragmentation was about 2.513 t/m3, and the …

(PDF) Automatic Identification of Coal and Rock/Gangue …

To improve the purity of coal and prevent damage to the coal mining machine, it is necessary to identify coal and rock in underground coal mines. At the same time, the mined coal needs to be ...

Coal and Gangue Separating Robot System Based on …

1. Introduction. In coal production, the raw coal mined directly from coal mines contains a lot of gangue, which contains a lot of heavy metals, and affects the calorific value of coal, causing serious pollution to the environment [].Therefore, it is essential to separate coal and gangue to make them play their respective roles [2,3].As an important part of the coal …

Associations of Gangue Minerals in Coal Flotation Tailing …

1. Introduction. Coal is an important energy source in some countries, especially in China, 1 Australia, 2 Poland, 3 and India. 4 The proportion of fine coal in the raw coal significantly increases with the high mechanization of coal mining technology. The separation of fine coal has become a severe challenge for the coal industry. 5,6 Froth …

An Image Preprocessing Model of Coal and Gangue in High Dust

The lighting facilities are affected due to conditions of coal mine in high dust pollution, which bring problems of dim, shadow, or reflection to coal and gangue images, and make it difficult to identify coal and gangue from background. To solve these problems, a preprocessing model for low-quality images of coal and gangue is proposed based on …

(PDF) Study on recognition of coal and gangue based on …

Aiming at the problems of low accuracy of coal gangue recognition and difficult recognition of mixed gangue rate, a coal rock recognition method based on modal fusion of RGB and infrared is proposed.

Grain size and shape fractal characteristics of gangue in the process …

The model of the ball mill used in this test is SMφ500×500mm test mill (Fig 3), the grinding medium is steel balls, the maximum single charge is 5 Kg, the maximum load of the grinding body is 100 Kg, the power is 1.5 kw, and the speed is 48 rpm.Rolling bearings mainly support the working principle, and the cylinder is driven to rotate through the transmission …

Coal-gangue recognition via multi-branch convolutional …

In order to further verify the generalization ability of MBCNN in coal-gangue recognition during the process of top coal caving, according to Fig. 5, the coal and gangue caving as well as various ...

Experimental Study on Properties of Rock-Cemented Coal Gangue

Properties of rock-cemented coal gangue-fly ash backfill (CGFB) bimaterials determine the effects of strip CGFB mining on controlling the surface subsidence in coal mines, which are affected by the coal gangue particle size in CGFB. In this paper, uniaxial compression tests were conducted on the coarse sandstone-CGFB composite samples …

A fast recognition method for coal gangue image processing

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 …

A review of coal gangue identification research

Coal gangue identication technology is also gradually improving with progress in China's top coal caving process. At the beginning, the coal gangue identication method for the process of releasing top coal relied on manual visual inspection to determine the procedure. Due to dust in the coal mining working faces, dangerous conditions, and …

Separating coal and gangue using three-dimensional …

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 …

The shape parameters of coal and gangue particles derived …

Coal and gangue particles. A total of 135 anthracite coal particles and 37 gangue particles were investigated, which are screened, cleaned and dried, and shown in Fig. 4 and Fig. 5.Both anthracite ...

Mechanism on Activation of Coal Gangue Admixture

2.2. Method 2.2.1. Mechanically Activated Coal Gangue and Fineness Detection (1) Mechanically activated coal gangue Coal gangue will produce varying particle sizes depending on the machine grinding instruments used, resulting in diverse mineral crystals, giving the particles activity. Therefore, the machine grinding process of coal …