coal gangue seperation

Nondestructive Identification of Coal and Gangue via Near ...

 · Coal-gangue separation is an essential step in the coal preparation process. However, existing manual selection and mechanical separation methods require a large amount of labor, consume too much water, and involve health hazards. In this article, we solve this problem based on the near-infrared spectroscopy (NIRS) technique in tandem with improved broad learning. First, to remove …

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Particle size distribution of coal and gangue after impact ...

 · Based on the separation and backfilling system of coal and gangue, the mineral material impact experiments were conducted utilizing the hardness difference between coal and gangue according to the uniaxial compression experiments. The broken coal and gangue particles were collected and screened by different size meshes. The particle size distributions of coal and gangue …

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Automatic Separation System of Coal Gangue Based on DSP ...

 · Coal gangue could been separated from the lump coal. To improve operation speed, the high performance microcontroller(DSP) was used as the core processor of system. It can achieve the real-time automatic separation of coal gangue. It provides a new technology for separation of coal gangue.

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US20140291213A1

The process for coal separation includes two steps of size grading and oversize raw coal separating. A size range is obtained through size grading, then the obtained raw coal is separated by a sensor system, and coal briquettes with high impurity contents are blown into an impurity chamber through high-speed compressed air, thus improving the separating accuracy and efficiency.

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Study on Crushing and Separation of Coal and Gangue ...

Therefore, the selective crushing and separation of coal and gangue was preliminarily tested through the testing machine so as to obtain the selective crushing pressure distribution curves of coal and gangue, and then the curves were drawn based on its numerical distribution. The two curves drawn in this way were placed in the same coordinate ...

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Innovative utilization of red mud through co-roasting with ...

 · Notably, coal gangue contains carbon, which can be used as a reductant in reduction roasting. Therefore, based on the progress of previous research, we have proposed an innovative recycling of red mud through co-roasting with coal gangue for separation …

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Coal and Gangue Underground Pneumatic Separation Effect ...

Coal and gangue underground pneumatic separation is of key importance for green mining. Two kinds of arrangement schemes for high-pressure value used in pneumatic separation system are proposed in this study. Pneumatic separation effects are examined under different arrangement of high-pressure value. Here, theoretical pneumatic separation distance formulas of mineral particles affected by ...

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Separation of gangue from coal based on histogram ...

 · Title: Separation of gangue from coal based on histogram thresholding, Author: IJTEEE, Name: Separation of gangue from coal based on histogram thresholding, Length: 4 …

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Efficient separation of silica and alumina in simulated ...

The combustion process of coal gangue and the subsequent separation of alumina and silica by alkaline leaching of the simulated CFB slag were investigated. The results show that, in the combustion process, kaolinite in coal gangue firstly converts into meta-kaolinite at 600-900 °C due to dehydroxylation, and then the meta-kaolinite splits into ...

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Design of coal gangue online identification and separation ...

 · A new on-line identification and automatic sorting system of coal and gangue is designed by integrating embedded technology and fieldbus technology. On line identification and automatic separation system of coal gangue. The principle block diagram of coal block and gangue online identification and automatic separation system is shown in Fig. 1.

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Automatic Separation System of Coal Gangue Based on DSP ...

Coal gangue could been separated from the lump coal. To improve operation speed, the high performance microcontroller(DSP) was used as the core processor of system. It can achieve the real-time automatic separation of coal gangue. It provides a new technology for separation of coal gangue.

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The coal and gangue recognition model based on model pruning can accurately capture the surface differences between coal and gangue due to their different hardness,and the reflec- tion generated by vitelline composition at the truncated surface of coal can be used as a reliable basis for identifying coal. The calculation amount and model size ...

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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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Sensors | Free Full-Text | Coal and Gangue Separating ...

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, coal gangue separation can improve ...

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Separation of gangue from coal based on supplementary ...

 · The separation of coal and gangue is an important aspect of coal production, which can improve coal quality, save energy, reduce consumption, and enable the rational use of resources. At present, manual selection remains widely implemented, but the working environment is harsh, labour intensity is high, and efficiency is low.

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Extraction of Coal and Gangue Geometric Features with ...

coal–gangue separation system with computer vision, in which industry cameras and computers are used to identify whether the object is coal or gangue through the pattern recognition technology. Ma et al. proposed the coal gangue on-line recognition and automation selection system with digital image processing technology [4].

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Extraction of alumina from alumina rich coal gangue by a ...

 · 1. Introduction. Coal gangue is an industrial solid waste produced by coal mining and processing [1–3].The average production of gangue accounts for 10–15% of raw coal production [4,5], making coal gangue one of the biggest solid wastes in China.At present, utilization ratio of coal gangue can reach about 60% in some countries.

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CN101637765B

The invention relates to an automatic separator of coal gangue, which comprises a raw material feeding copper, a coal receiving copper, a gangue receiving copper, a conveying-belt conveyor, an identification and separation controlling mechanism and an executing mechanism, wherein the conveying-belt conveyer is arranged among the raw material feeding copper, the coal receiving copper and the ...

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A coal mine gangue underground sorting collaborative in-situ backfilling and mining system to achieve different target levels has been proposed,which mainly includes three different levels of underground coal gangue separation technolo- gy,i. e. full particle separation,coal gangue separation and raw coal gangue discharge,and two aspects of ...

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Coal and Gangue Separating Robot System Based on Computer ...

 · As an important part of the coal industry, coal gangue separation can improve coal quality, save energy, and reduce consumption and thus rationally use resources . At present, coal and gangue separation includes moving sieve jigging method, heavy medium separation, dual-energy γ-ray separation, X-ray, and image recognition method.

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Fine coal dry classification and separation

The coal particles floated to the surface of the MSFB, while the gangue particles sank to the bottom of the MSFB. After forty seconds of separation, both the …

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Coal and Gangue Separating Robot System Based on Computer ...

 · 1 School of Mechanical Electronic & Information Engineering, China University of Mining & Technology, Beijing 100083, China; [email protected] 2 Mine Robot Research Center, China University of Mining & Technology, Beijing 100083, China; [email protected] * Correspondence: [email protected]

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Energies | Free Full-Text | Automatic Coal and Gangue ...

Gangue is a solid waste with low carbon content, which is usually mixed into the raw coal during production. Due to the inefficiency of gangue separation, much gangue flows out of the mining area, which increased the transporting costs and caused severe pollution to the environment [].Therefore, effectively sorting gangue from the raw coal is essential in improving the quality of the coal and ...

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CiteSeerX — Separation Of Gangue From Coal Based On ...

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): ABSTRACT: Coal gangue is residual abandoned coal, produced after the pre-processing steps of mining. It is an amalgam of several unwanted substances. It is important to separate coal gangue from lump coal before fed to thermal power plants. In this paper, investigation on the fundamental characteristics of coal images ...

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Coal gangue separation system based on density measurement ...

 · Coal gangue separation system based on density measurement. Abstract: Coal gangue separation is an essential part of the development and utilization of coal. A method of separating gangue from coal based on the density by calculating volume and weight of the ores which is measured by the designed equipment was given in this paper.

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Separation of aluminum and silica from coal gangue by ...

 · However, when the coal gangue particles are too small, particle agglomeration hinders the increase in surface area. In addition, liquid–solid separation becomes difficult after acid leaching. Therefore, coal gangue with a size of 74 μm was selected as the appropriate size for the acid leaching. 3.2.2. Effect of liquid–solid ratio

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Novel Methods for Separation of Gangue from Limestone and ...

 · The last method used gray scale texture features computed on a quantized color image. Results showed that the accuracy for separation of gangue from limestone, a joint color-texture method was 98 % and for separation of gangue from coal, multispectral method with correlation and joint color-texture method were 100 % respectively.

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Visual Positioning and Recognition of Gangues Based on ...

 · Gangue separation is necessary before raw coal is loaded for transportation. Figure 2 describes the structure of a typical gangue separation line. As shown in the figure, the raw coal needs to pass through a vibration sieve to filter out small coal blocks.

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Overview of Solid Backfilling Technology Based on Coal ...

coal-waste separation and solid backfilling technology could achieve gangue discharging reduction, underground washing and surface subsidence control. It is e ective at realizing green mining. Keywords: coal-waste separation; solid backfilling; mining-separating-backfilling + X; green mining 1. Introduction

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Sensors | Free Full-Text | Coal and Gangue Separating ...

In coal production, the raw coal contains a large amount of gangue, which affects the quality of coal and pollutes the environment. Separating coal and gangue can improve coal quality, save energy, and reduce consumption and make rational use of resources. The separated gangue can also be reused. Robots with computer vision technology have become current research hotspots due to simple ...

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Fluidization characteristics and density-based separation ...

 · In the flowsheet, the separation of ROM coal sample were performed after achieving a stable fluidization at U = 1.6 and 1.8 U mf for high- and low-density separations, respectively. High-ash gangue was initially discharged in the first separation stage, and low-ash clean coal was obtained by further separation.

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Gangue

Gangue minerals, once separated by mineral dressing processes of (most of) the valuable ore minerals and dumped in mine tailings may be a significant environmental impact. In particular, oxidation of pyrite, a common gangue mineral, is one of the main sources of acid mine drainage. Re-use. Minerals that were once thought of as gangue, and were dumped, may later find a commercial use.

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Study of Automatic Separation System of Coal and Gangue by ...

Separation of coal and gangue is an important procedure in coal production. Present separating technology has such defects as low efficiency, high pollution, high energy consumption, and high cost. Based on the analysis of grey value of digital images, we prompt a new separation …

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Separating coal and gangue using three-dimensional laser ...

 · Separation of coal and gangue. 3D laser scanning technology. Laser triangulation method. Laser beam segment. 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 ...

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Photoelectric Intelligent Dry Type Coal Separator

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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