Chat Online

click to chat

QUALITY DIFFERENTIATES OUR BRAND

Different Machines to Meet All Needs

  • Distribution Characteristics and Pollution Assessment of

     · Distribution Characteristics and Pollution Assessment of Hg in Soil around Coal Gangue in Fengfeng Mining Area. De Tian 1 2 Mingxu Gu 1 2 Jianqing Zhao 1 2 Chenchen Wang 3 and Lin Du 3. Published under licence by IOP Publishing Ltd

    Chat Online
  • CiteSeerX — An Efficient of Coal and Gangue Recognition

    CiteSeerXDocument Details (Isaac Councill Lee Giles Pradeep Teregowda) The separation for coal and gangue is an important process in mine production. In order to automatically select the gangue this study obtained the difference and distribution regularity of the grayscale distribution by analyzing a large number of image data. By improving Bayesian Decision theory identifiably

    Chat Online
  • Enrichment of heavy metals in coal gangue by puff balls

     · on coal gangue puffball-covered coal gangue (biotic coal gangue) and surrounding coal gangue without puff balls (control coal gangue) were collected in a large coal gangue dump of Maiping mining area in Huaxi District of Guiyang City in November 2012 (Fig. 1). The diameters of puffball fruiting bodies range from 2–6 cm. 2.2 Experimental methods

    Chat Online
  • Environmental-friendly coal gangue-biochar composites

     · Coal gangue as a solid waste generated during coal mining and washing not only encroaches on a large number of land resources but also poses certain risks to the environment. It is reported that the cumulative amount of coal gangue piled up in China has reached 6 billion tons and the annual discharge amount is about 500–800 million tons.

    Chat Online
  • Micro‐pore structure characteristics and

    Coal gangue is the solid waste generated in the coal mine production process including excavation gangue generated during rock roadway excavation gangue extracted from rock interlayer in the roof floor and coal seam during coal mining and wash gangue discharged from coal preparation plant 1 . The gangue produced in

    Chat Online
  • Study on speciation and Distribution characteristics of

    Taking the coal gangue mountain in Hebei Fengfeng mining area as the research object 30 soil samples were collected in the east southeast and southwest directions within 300m of the coal gangue mountain boundary and the coal gangue stacking were used to study the heavy metal pollution of the surrounding soil. The heavy metal form of soil around coal gangue was extracted by Tessier five-step

    Chat Online
  • Characterization of Heavy Metals from Coal Gangue

    Coal gangue a residue obtained during the coal mining process accounts for 10–15 of raw coal produced. Usually this coal gangue is transported and stacked loosely in the nearby areas. Long term piling up of this mine waste can volatilize large amounts of potentially toxic heavy metals which have the ability to infiltrate surrounding ecosystems.

    Chat Online
  • Rapid synthesis and NH3-SCR activity of SSZ-13 zeolite via

    Coal gangue is a typical waste produced during coal mining and washing. Synthesis of zeolites via coal gangue can contribute to resource recycling and environmental protection. In this study high-silica SSZ-13 was synthesized by one-step hydrothermal synthesis from coal gangue without the traditional pretreatment methods of high-temperature roasting and alkali melting making it more

    Chat Online
  • Influence of coal gangue mulching with various thicknesses

     · 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

    Chat Online
  • Coal Gangue Crushing and ScreeningJXSC Mine

     · Coal gangue is a kind of pollution sources which produced in coal mining. It can recycle via coal gangue crushing and screening. The gangue discharged from coal mining is composed of various kinds of rocks the hardness and calorific are different. Analyzes the effect that different crushers machine crushing gangue.

    Chat Online
  • Review of Coal Gangue Characteristics and Ecological

     · 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 and life.

    Chat Online
  • Exposure of heavy metals in coal gangue soil in and

    Exposure of heavy metals in coal gangue soil in and outside the mining area using BCR conventional and vortex assisted and single step extraction methods. Impact on orchard grass Chemosphere. 2020 Sep255 126960. doi 10.1016/j emosphere.2020.126960. Epub 2020 May 1. Authors

    Chat Online
  • Mechanical analysis of basic roof fracture mechanism and

    Coal mining with partial gangue backfilling (CMPGB) method has the advantages of both high filling efficiency and excellent workface capacity which breaks through the technical bottleneck of full-section backfilling mining. In order to reveal the fracture mechanism and characteristics in CMPGB workface this paper presents a comparative analysis of the filling ratio of different filling

    Chat Online
  • Basic Characteristics of Coal Gangue in a Small-Scale

    Coal is the main energy used in China at present accounting for about 70 of one-time energy consumption in China 1 . Coal mining and washing will produce a large amount of coal gangue. In 2019 the output of coal gangue in China is 470 million tons

    Chat Online
  • China Coal Gangue Industry Market Research and

     · Coal gangue refers to the solid waste in the emission of coal mining and coal washing. It is the black and gray rock with low carbon content. And it emerges along with coal but harder than coal.

    Chat Online
  • Characterization of heavy metals in coal gangue-reclaimed

     · Coal gangue is practically used as a filling material for soil reclamation in the coal mining subsidence areas. Due to the toxic elements enriched in coal gangue the reclaimed soils potentially pose great environmental concerns.

    Chat Online
  • The External Environmental Cost of Coal

     · Coal mining sewage treatment Gangue land use Gangue self-burning loss Local resident emigration Environmental loss of agriculture land Dispersion of coal dust Planting cost Grassland degradation Biodiversity loss by deforestration Soil damage by gaugue 0 75.00 150.00 225.00 300.00 0.01 0.05 0.10 0.12 0.13 0.14 0.65 0.97 1.43 3.14 3.41 4.34 6.68

    Chat Online
  • Study on speciation and Distribution characteristics of

    Taking the coal gangue mountain in Hebei Fengfeng mining area as the research object 30 soil samples were collected in the east southeast and southwest directions within 300m of the coal gangue mountain boundary and the coal gangue stacking were used to study the heavy metal pollution of the surrounding soil. The heavy metal form of soil around coal gangue was extracted by Tessier five-step

    Chat Online
  • Basic Characteristics of Coal Gangue in a Small-Scale

    The accumulation/improper treatment of coal gangue will not only lead to waste of land but also cause environmental pollution. Especially the impact of radioactive elements on the surrounding ecological environment is widely concerned by many scholars. In this study the concentration of radioactive elements (uranium (U) and thorium (Th)) of small-scale coal gangue mining site and surrounding

    Chat Online
  • Influence of coal gangue mulching with various

     · 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

    Chat Online
  • Utilization of coal gangue as coarse aggregates in

     · In China coal gangue accounting for 1/10 even 1/5 of coal production is one of the major industrial and mineral residues. The stock of coal gangue in China has reached a billion level with an increasing rate of 150–200 million per year .

    Chat Online
  • An Image-Based Hierarchical Deep Learning Framework for

     · Abstract The efficient separation of coal and gangue in the mining process is of great significance for improving coal mining efficiency and reducing environmental pollution. Automatic detection of coal and gangue is the key and foundation for the separation of coal and gangue. In this paper we proposed a hierarchical framework for coal and gangue detection based on deep learning

    Chat Online
  • Exposure of heavy metals in coal gangue soil in and

    Exposure of heavy metals in coal gangue soil in and outside the mining area using BCR conventional and vortex assisted and single step extraction methods. Impact on orchard grass Chemosphere. 2020 Sep255 126960. doi 10.1016/j emosphere.2020.126960. Epub 2020 May 1. Authors

    Chat Online
  • Coal gangueElectro Magnetic Industries

    Coal gangue. Coal gangue is solid waste discharged from the process of coal mining and washing. It is low carbon dark gray rock that is much harder and associated with coal seams. Coal gangue processing and production process. Coal gangue comprehensive recycling will be an effective way to alleviate the shortage of resources. With the

    Chat Online
  • Integrated green mining technology of "coal mining-gangue

     · Underground backfilling coal mining has a large demand for gangue in Tangshan Mine. A vertical feeding hole with a diameter of about 600 mm is dug to transport the gangue to the underground for backfilling thereby ensuring the continuous and efficient supply of gangue.

    Chat Online
  • Radiation characteristics of natural gamma-ray from coal

     · Recognition of coal and gangue (roof rock) is a key technology to realize fully mechanized top coal caving automated mining. This paper proposes to detect the instantaneous refuse content of

    Chat Online
  • The External Environmental Cost of Coal

     · Coal mining sewage treatment Gangue land use Gangue self-burning loss Local resident emigration Environmental loss of agriculture land Dispersion of coal dust Planting cost Grassland degradation Biodiversity loss by deforestration Soil damage by gaugue 0 75.00 150.00 225.00 300.00 0.01 0.05 0.10 0.12 0.13 0.14 0.65 0.97 1.43 3.14 3.41 4.34 6.68

    Chat Online
  • Coal gangueElectro Magnetic Industries

    Coal gangue is solid waste discharged from the process of coal mining and washing. It is low carbon dark gray rock that is much harder and associated with coal seams. Coal gangue processing and production process Coal gangue comprehensive recycling will be an

    Chat Online
  • Characterization of dissolved organic matter derived from

     · During the processes of coal mining washing and preparation approximately 8 billion tons of mine water was generated every year from coal mine areas because of its extremely low utilization efficiency (< 25 ) in China (Zhao and Chen 2015 Cao et al. 2020).

    Chat Online
  • Extraction of alumina from alumina rich coal gangue by a

     · 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

    Chat Online
  • Characterization of dissolved organic matter derived from

     · Organic and nitrogen pollutants in mine water could be removed effectively during the storage and transport of water in a coal mine underground reservoir packed with coal gangue through various water-rock interactions. However little is known about the effect of the released dissolved organic matter (DOM) derived from the packed matrix on their removal. Column experiments were performed at a

    Chat Online
  • Coal-Gangue Interface Detection Based on Ensemble

     · Abstract To realize the unmanned automation of the full mechanized caving the bottleneck problem of coal-gangue interface detection in top coal caving must be solved first. Targeting coal-gangue interface detection on fully mechanized mining face an alternative scheme to detect coal-gangue interface based on vibration signal analysis of the tail boom support of the longwall mining machine.

    Chat Online
  • Phosphate Removal from Secondary Effluents Using Coal

     · Coal gangue is one of the major solid wastes produced as a result of coal mining and its washing. Generally the total discharge capacity of coal gangue can reach up to 10–15 of the total raw coal extraction 10 . In China approximately 315 million tons of coal gangue is produced on annual basis with a total piling of about 4.5 billion

    Chat Online
  • Reutilisation of coal gangue and fly ash as underground

     · The coal gangue and fly ash used in the experiments were collected from a gangue dump and a power plant in the Coal Mine respectively. In practical applications due to the limitations of the backfill process and equipment only gangue with a particle size of 50 mm or less is generally used for backfill (Li et al. 2017 Li et al. 2017).

    Chat Online
  • coal-gangueWinnerMac

    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.

    Chat Online
  • A Study of Multispectral Technology and Two-Dimension

     · Coal is one of the main sources of human energy. In the process of coal mining separating gangue from coal has great significance for environmental protection and energy conservation. The core problem in the separation of gangue is the recognition of coal and gangue. In this study multispectral technology was used to identify gangue. First set up a data acquisition system in the laboratory

    Chat Online