Coal gangue gyratory breaking

Thermal decomposition of selected coal gangue

2017-9-20 · TG-DTG-DSC curve (Fig. 2) of illite-type coal gangue (sample 6 selected) reveals that the mass loss and heat absorption effect under 40–120 °C were caused by the discharge of absorbed water.One mass loss step on TG curve and broad and gentle heat absorption valley on DSC curve within 120–400 °C were mainly caused by the loss of free water, interlayer water, …

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Utilization of coal gangue for the production of brick

2016-6-8 · Coal gangue, an industrial solid waste discarded from coal mining and processing, was used as the sole raw material to prepare brick. The coal gangue was crushed, homogenized, milled and then pressed into green compacts. The dried compacts were sintered at different temperatures for 2 h. The obtained brick samples were characterized with X-ray diffraction, …

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Porous mullite thermal insulators from coal gangue …

2017-3-3 · Porous mullite materials with high porosity of 71.8–88.2% were prepared by foaming of coal gangue/Al2O3/starch composite slurry and subsequent pore structure stabilization using starch consolidation and sintering. Coal gangue was recycled to prepare porous mullite foams. Starch was used as gellant, replacing commonly used poisonous chemical and expensive …

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Coal gangue detection and recognition algorithm based …

4.1 Design and implementation of coal gangue detection and recognition device. This study proposes an method for coal gangue detection and recognition on the basis of the DCN-YOLOv3 algorithm. Firstly, the method collects real-time video images of a conveyor belt operation through an industrial camera erected perpendicular to the conveyor belt.

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Materials | Free Full-Text | Prediction of Strength and CBR ...

Coal mining waste in the form of coal gangue (CG) was established recently as a potential fill material in earthworks. To ascertain this potential, this study forecasts the strength and California Bearing Ratio (CBR) characteristics of chemically stabilized CG by deploying two widely used artificial intelligence approaches, i.e., artificial neural network (ANN) and random forest (RF ...

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Evaluation of Mechanical Properties and Microscopic …

Coal gangue, a solid waste produced in coal production, had caused serious environmental pollution due to accumulation on dumps. Embankment filling can solve the problem while significantly consuming the amount of coal waste for mining. The main purpose of this study is to investigate the mechanical …

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Energies | Free Full-Text | Image Recognition of …

2019-5-8 · Recognizing and distinguishing coal and gangue are essential in engineering, such as in coal-fired power plants. This paper employed a convolutional neural network (CNN) to recognize coal and gangue images and …

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Study on chloride binding capability of coal gangue based …

2018-4-10 · The phase composition and Friedel''s salt contents in the specimens were evaluated by XRD and TG-DTG analysis. The results showed that the specimens chloride binding isotherms could be described by Freundlich equation. The coal gangue optimal content was between 20% and 30% and the maximum content was 40%. The chloride binding capability of slag ...

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Review of Coal Gangue Characteristics and Ecological …

2021-5-1 · Coal gangue has become one of the industrial wastes with the largest annual discharge and accumulated stock in China. The disorderly accumulation of coal gangue not only occupies a large amount of land resources and causes natural disasters, but also pollutes the surrounding ecological environment, which in turn affects human health and normal production …

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Field study on the improvement of coal gangue filling …

2021-5-5 · Tamping energy can induce a shock wave, breaking coal gangue particles and improving coal gangue gradation. With increasing tamping energy, the shock wave was increased, increasing the effective improving depth. When tamping energy is greater than 3000 kN.m, the effective improving depth is approximately 6–8 m and the fine-rough ratio is ...

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Multipoint Acceleration Information Acquisition of the …

2021-1-7 · Coal gangue particles used in the research are shown in Fig. 2, the size and shape of coal gangue particles are different, so as to reproduce the random contact state impact of coal gangue and the metal plate.All the sensors used are 1A102E general-purpose piezoelectric acceleration sensor produced by Donghua Test Company.

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Coal gangue cemented filling material and high-fluidity …

2021-6-11 · The invention discloses a coal gangue cemented filling material and high-fluidity high-solid content cemented filling material slurry, wherein the coal gangue cemented filling material is composed of coal gangue, cement, fly ash, auxiliary materials and a water reducing agent; 50-95 parts of coal gangue, 4-20 parts of cement, 1-50 parts of fly ash, 0.5-40 parts of auxiliary …

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(PDF) Trace Elements in Coal Gangue: A Review

2018-1-24 · Due to much higher mineral contents, the mobility of trace elements in coal waste is expected to differ significantly from that in coal (Li et al. …

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Influence of coal gangue mulching with various …

2021-7-28 · 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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Coal Gangue Crushing and Screening

2022-6-1 · 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 (gallium ...

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The comprehensive utilization of the coal gangue.

2022-6-23 · Gangue is a low-carbon solid waste produced during coal mining and washing, accounting for about 10%− 15% of the total coal output [3]. The cumulative gangue output in China is close to 5 ...

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Microstructure of Coal Gangue and Precipitation of Heavy …

2017-11-23 · The microstructure and mineral composition of the gangue play a decisive role in the precipitation of heavy metal elements. In this study, the microstructure, mineral composition, and precipitation of heavy metal elements of coal gangue with different weathering degrees were analyzed through electron microscopy, X-ray diffraction, and static immersion leaching …

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Recognition Methods for Coal and Coal Gangue Based on …

2021-5-17 · Recognizing coal and coal gangue is an important part of the coal industry and is mainly conducted via human sorting at present. Consequently, considerable manpower is needed, which adds a burden to enterprises and results in low efficiency. As an important branch of artificial intelligence, deep learning has been widely applied in many fields, especially in …

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Coal and Gangue Separating Robot System Based on …

2021-2-14 · 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 industry, …

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Gasification and activation behaviors of coal gangue with …

2022-4-1 · 1. Introduction. The accumulation of coal gangue (gangue) has wasted lots of land resources [], and the harmful components in gangue will migrate into soil after rain-washed [].Moreover, gangue also encounters a serious spontaneous combustion problem which always resulting in a large amount of harmful gas emission [3,4].Nowdays, the gangue with a high …

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Recognition Methods for Coal and Coal Gangue Based on …

2022-6-8 · This paper proposed an improved YOLOv4 algorithm as a classic deep learning method for the intelligent and highly accurate recognition of coal and coal gangue. Compared to other algorithms, YOLOv4 ...

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Effects of Fine Gangue on Strength, Resistivity, and …

2015-5-21 · The cemented coal gangue backfill (CGB) in coal mining is normally made of gangue (particle size of 0–15 mm), fly ash, cement, and water. In this study, the effects of the weight content (ranging from 20% to 60%) of fine gangue (0–5 mm) on the microscopic characteristics, resistivity, and compressive strength of CGB were investigated at 3 d and …

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Coal gangue crushing line_LIMING Mining and …

2022-2-16 · The capacity of coal gangue crushing line can reach 200-300T/H, and the finished products'' size can be 1mm. Raw coal gangue whose size is bellow 1020mm will be sent to vibrating feeder, and vibrating feeder will sent …

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Mechanism on Activation of Coal Gangue Admixture

2021-9-28 · 2.4. Macro-Test Method (1) Strength test method: the strength of coal gangue mortar was tested with a YES-2000B testing machine according to GB/T17671-1999 [33]. Figure 6 shows the experimental method of compressive resistance of specimens. Compressive strength R c takes Newton per square millimeter (MPa) as the unit and is calculated according to the …

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Improving coal/gangue recognition efficiency based on …

2022-2-15 · The polypropylene sample box is used to place coal-gangue samples. The height of the box is 9.5 cm, which can reduce the influence of surrounding airflow during the experimental process. The spray is used to spray the liquid evenly. The sample holder is used to pick coal/gangue samples to avoid the influence of body temperature on sample ...

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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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Preparation and characterization of coal gangue …

2018-10-30 · The mass loss was used as the non-evaporable water content of coal gangue geopolymers specimens. The non-evaporable water content was calculated in accordance with Formula (1). (1) W ne = W 0 - W 1 / W 0 where. W 0 —mass of specimen after heating at 105 °C (g), W 1 —mass of specimen after heating at 900 °C (g). 2.3.4.

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The environmental characteristics of usage of coal gangue …

Recognizing coal and coal gangue is an important part of the coal industry and is mainly conducted via human sorting at present. Consequently, considerable manpower is needed, which adds a burden ...

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Study on the Parameter Optimization and Strength …

2020-7-28 · It can be seen from Table 3 that this type of coal gangue is a low-calcium mineral with high contents of SiO 2 and Al 2 O 3 and potential high activity. Based on the experiment specification of activity index test of coal gangue (GB/T17671-1999), the coal gangue was prepared into coal gangue cement mortar, and the cement mortar was used as the reference …

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Coal Gangue Sorting System—HXS Intelligent Dry Type …

Coal gangue identification flowchart. Technical features ※ Wide processing size range: It can handle 30- 600mm raw coal. The upper limit of separation is 600mm and the lower limit is 30mm. ※ High separation accuracy: The rate of gangue removing is over 95%, the rate of coal in gangue is less than 2%, and the separation effect is significant.

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Coal gangue detection and recognition algorithm based …

2021-12-7 · Coal gangue detection and recognition algorithm based on deformable convolution YOLOv3 De-yong Li1,3,4 Guo-fa Wang3,4 Yong Zhang1,2 Shuang Wang1,2 1 State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology,

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Source Alkali-Leached from Coal Gangue Synthesis of …

2017-5-9 · 14/[188] J. Yang et al. Figure 3. Influence of mass ratio of NaOH to CCG (M NaOH/M CCG) on the mass ratio of filter cake to the CCG(M fc/M CCG). where M CCG and wCCG S are the mass of the CCG used in the batch and the mass fraction of SiO 2 in the CCG, respectively. M fc and wfc S are the mass of the filter cake and the mass fraction of SiO 2 in the filter cake, …

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Characteristics of leaching of heavy metals from low-sulfur …

2021-3-11 · Coal gangue is an industrial solid waste inevitably produced in coal mining and coal washing, and its emissions account for approximately 10%–15% of coal production (Zhou et al. 2014a, b) ina is the country with the highest coal production in the world, and a large amount of coal gangue waste is piled on the surface at mining sites to form coal gangue hill, occupying a …

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