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Properties of Cemented Coal Gangue-Fly Ash Backfill ...

Cemented coal gangue-fly ash backfill (CGFB), which is a mixture of coal gangue, fly ash, cement, and water, is being extensively used for subsidence control and waste management. A pipe flow model...

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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 drawn ...

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Evaluation for the Leaching of Cr from Coal Gangue Using ...

Coal gangue can cause significant heavy metal pollution in mining areas, which would have a negative impact on the environment and human health. The objective of this research is to investigate the relationship between expansive soil amount and the leaching behavior of Chromium from coal gangue and the engineering properties of coal gangue used as building materials.

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Performance of cemented coal gangue backfill | SpringerLink

Abstract. Possibility of cemented gangue backfill was studied with gangue of Suncun Coal Mine, Xinwen Coal Group, Shandong, and fly ash of nearby thermal power plant, in order to treat enormous coal gangue on a large scale and to recovery safety coal pillars.

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Engineering properties of cement with coal gangue - infona.pl

Engineering properties of cement with coal gangue was studied to determine the compressive strength, freeze-thaw and shrinkage characteristics of the material. The composition of coal gangue was determined using the screening test; the liquid limit, plastic limit and water ratio of the cement with coal gangue were measured using the Liquid and Plastic Limit Joint Detector.

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Evaluation for the Leaching of Cr from Coal Gangue Using ...

Coal gangue can cause significant heavy metal pollution in mining areas, which would have a negative impact on the environment and human health. The objective of this research is to investigate the relationship between expansive soil amount and the leaching behavior of Chromium from coal gangue and the engineering properties of coal gangue used as building materials.

    Author: Yan Zhang, Hassan Baaj, Rong ZhaoGet Price

Microstructure of Coal Gangue and Precipitation of Heavy ...

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 experiments.

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Study on physical and mechanical properties of the coal ...

Study on physical and mechanical properties of the coal gangue for filling. By X.G. Zhang, H.L. Wang & Z.P. Liu. Pages 4 ...

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The composition, morphology, and mechanical properties of ...

The result showed that EPDM can not only enhance the interaction between coal gangue powder and the matrix but also promote the dispersion of coal gangue powder. With the addition of coal gangue encapsulated by EPDM, the impact strength of composition dropped greatly, but it still kept about 11 kJ/m 2 when the content of encapsulated coal ...

  • Published in: Polymer Composites · 2009Authors: Ying Liu · Banghu Xie · Wei Yang · Mingbo YangAffiliation: Sichuan UniversityAbout: Carbon · Fracture toughness · Coal · Composite material · Polypropylene · Izod impac.Get Price

What Are The Physical Properties Of Coal Gangue

the utilization of coal gangue is strictly limited. A few field projects that used coal gangue have not been reported. Because the property, composition, and quality of coal gangue are related to factors such as the coal's location, process methods, and outer conditions, it is difficult to keep the chemical and physical properties of coal gangue

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Microstructure of Coal Gangue and Precipitation of Heavy ...

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 experiments.

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Preparation and Property of Fly Ash/Coal Gangue Mine ...

2015 World of Coal Ash (WOCA) Conference in Nasvhille, TN ... Preparation and Property of Fly Ash/Coal Gangue Mine Backfilling Material Author: Dongmin, Wang;Duanle, Li;Lei, Chen;Jingge, Yin ... 2015 World of Coal Ash (WOCA) Conference in Nasvhille, TN - May 5-7, 2015 Keywords: fly ash, coal gangue, controlled low strength material, backfill mining

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Fabrication and characterization of self-ignition coal ...

May 05, 2016 · Read "Fabrication and characterization of self-ignition coal gangue autoclaved aerated concrete, Materials & design" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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A novel environmental route to ambient pressure dried ...

Free Online Library: A novel environmental route to ambient pressure dried thermal insulating silica aerogel via recycled coal gangue.(Research Article) by "Advances in Materials Science and Engineering"; Engineering and manufacturing Aluminum compounds Waste management Coal industry Recycling Recycling (Waste, etc.) Silica Silicon Silicon dioxide

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Study on Properties of Coal Gangue Derived SiO2 Aerogel ...

In the paper, a kind of SiO2 aerogel based on coal gangue was synthesized and its physical properties were investigated. The properties of the composite mortar prepared with the synthesized aerogel as aggregate were further discussed. The results showed that the aerogel gained has a specific surface area of 690 m2/g, a porosity of >90%, an average pore...

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Mechanical properties and microstructures of hypergolic ...

The hypergolic coal gangue is caused by the self-ignition of accumulated coal gangue due to heat accumulation. The content of SiO 2, Al 2 O 3 and CaO in hypergolic coal gangue of this experiment is 64.52%, 15.18%, and 4.65% respectively. The content of CaO is less than 10%, so this hypergolic coal gangue powder belongs to superfine powder.

    Author: Changjiang Liu, Xiaowei Deng, Jian Liu, David HuiGet Price

Effects of soil properties on vegetation restoration in ...

Therefore, the native plant species should be take into consideration to be applied in restoring vegetation in coal-gangue pile, and different species should be selected depending on the discarding age of coal-gangue pile, along with using soil chemicals and physical properties.

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Mechanical Properties of Coal Gangue Used as Subgrade Filling

In view to the gangue characteristic and the roadbed padding's essential requirements, the improving experiments for gangues mix the clay in four coal mines along the route to the Jidong highway Huojia section were carried out. It has been studied that the compaction test, the oedometric test, the California bearing test and the direct shear test for coal gangues mixed with clay and them in ...

    Author: Ying Peng, Jun Sheng Yang, Jian Hua LiuGet Price

Desulfurization gypsum uses and properties - take it as ...

Mix desulfurization gypsum with other mixed materials such as coal gangue and slag, then send the mixed raw materials to the raw material warehouse for cementing. This will solve the wet and sticky problem of desulfurization gypsum, but the addition of the loader batching part produces dust, and can not guarantee the uniformity.

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The structural and surface properties of natural and ...

A novel application of coal gangue as inexpensive adsorbents is considered in this study. The structural and surface properties of natural and modified gangue were studied via nitrogen adsorption. Four types of samples were studied: natural, modified with H2NO3 and H2O2 and calcined at 250 °C and 600 °C.

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Pozzolanic behaviour of compound-activated red mud-coal ...

The pozzolanic behaviour of compound-activated red mud-coal gangue has been investigated through TG, DTA, XRD, FTIR and {sup 27}Al MAS NMR. From viewpoint of reaction kinetics, it is found that the pozzolanic reaction mechanism of the compound-activated red mud-coal gangue - .

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