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Release Activity and Potential Ecological Risk Assessment ...

Focused on release activity of different weather degree gangue of Han Cheng, evaluate heavy metals potential release risks by Hakanson instrument. The results showed that the content of heavy metals were more than their background in unweathered gangue. The Sang shuping gangue were Cd,Cr and As, so did Cd, Pb, Cr, Cu, Ni and As in Xia yukou.

  • Published in: International Journal of Energy and Power Engineering · 2015Authors: Li Wanpeng · Sun Yaqiao · Yao Meng · Dou LinAbout: Heavy metalsGet Price

Nano-scale coal gangue powder adsorption fertilizer ...

The invention relates to a nanometer coal gangue powder adsorption fertilizer, which is characterized in that the selected coal gangue is subjected to multiple physical crushing, so that the crushed granularity of the coal gangue is below 0.2 millimeter, the coal gangue powder accounts for more than 60 percent and simultaneously phosphate mineral powder, sylvite mineral powder and carbonate mineral powder are .

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Materials | Free Full-Text | Preparation and Reaction ...

Abstract In this paper, slag is used as a calcium source to make alkali-activated coal gangue–slag (AACGS) based material. The reaction mechanism of AACGS materials was discussed in depth by means of XRD, FT-IR, 29 Si MAS-NMR (nuclear magnetic resonance) and SEM-EDS (energy dispersive spectrometer). The experimental results show that coal gangue can be used as a raw material for .

    Author: Hongqiang Ma, Hongguang Zhu, Cheng Yi, Jingchong Fan, Hongyu Chen, Xiaonan Xu, Tao WangGet Price

Experimental Study on Chloride Ion Penetration Resistance ...

Coal Gangue Concrete, Chloride Ion Penetration, Water Cement Ratio, Crack Width, Curing Temperature. 1. Introduction. With the acceleration of China's modernization process, coal gangue is accompanied by coal mining and the use of coal resources.

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Environmental Problems of Coal Gangue Air Storage in ...

The measures of coal gangue development and utilization have double meanings of environmental protection and economic benefit in Pingdingshan mining area. Abstract Introduction

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Materials | Free Full-Text | Preparation and Reaction ...

Abstract In this paper, slag is used as a calcium source to make alkali-activated coal gangue–slag (AACGS) based material. The reaction mechanism of AACGS materials was discussed in depth by means of XRD, FT-IR, 29 Si MAS-NMR (nuclear magnetic resonance) and SEM-EDS (energy dispersive spectrometer). The experimental results show that coal gangue can be used as a raw material for .

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Adsorption removal of cationic dyes from aqueous solutions ...

Mar 15, 2019 · Coal gangue is an industrial solid waste discharged during coal mining and washing (Haibin and Zhenling, 2010). It is a black gray rock with low carbon content accompanying the coal beds. It is a black gray rock with low carbon content accompanying the coal beds.

Properties of coal gangue-Portland cement mixture with ...

Jun 01, 2019 · As an industrial solid waste, coal gangue is discharged when coal is excavated and washed in the production procedure, . The average emission of coal gangue is about 15% of total coal production . The annual emission of coal gangue in China .

Cemented Coal Gangue-Fly Ash Backfill Technique

Email to a Friend Abstract "The cemented coal gangue-fly ash backfill technique (CGFB) has commonly been used to control subsidence damage caused by underground coal mining. This paper discusses the CGFB backfilling process used at the Xin-Yang coal mine, Shanxi Province, China. A general description of the components of the CGFB are provided.

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[Based on Curing Age of Calcined Coal Gangue Fine ...

Through on the top of the activity of different curing age 700 degrees C high temperature calcined coal gangue fine aggregate mortar, XRD and SEM analysis showed that with the increase of curing age, secondary hydration reaction will be more fully, and the amount of .

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Modification of waste coal gangue and its application in ...

Abstract. We developed a new calcination method to convert coal gangue (CG), a common waste generated from coal production process, into a modified form, which could be used as an adsorbent to remove Mn(2+) from aqueous solution. Sodium tetraborate (Na2B4O7·10H2O) was added into the CG calcination process as an additive, and the concentrations ...

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Equilibrium and kinetics studies of Cd(II) sorption on ...

In this study, coal gangue, a solid waste, was used as an alternative low-cost precursor to synthesize zeolite NaX, aiming to remove Cd(II) from aqueous solution. The detailed synthesis process and method of zeolite NaX using coal gangue will be reported in another paper.

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Effect of content and particle size distribution of coal ...

The mechanical property of concrete containing coal gangue aggregate was also measured. The results show that, the main composition of coal gangue is SiO2, which may result in ASR damage of concrete.

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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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[Based on Curing Age of Calcined Coal Gangue Fine ...

Through on the top of the activity of different curing age 700 degrees C high temperature calcined coal gangue fine aggregate mortar, XRD and SEM analysis showed that with the increase of curing age, secondary hydration reaction will be more fully, and the amount of .

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Effect of content and particle size distribution of coal ...

Coal gangue aggregate will not obviously affect the performance of concrete containing coal gangue aggregate when the content of coal gangue aggregate is limited to some extent. View Show abstract

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Coal and Coal Gangue Separation Based on Computer Vision ...

Aug 22, 2010 · Abstract: We consider the problem of automatically separating coal and coal gangue based on computer vision and design a coal and coal gangue separation system framework based on video. Grayscale histogram, fractal dimension and energy value are extracted as ore features.

Assessment of heavy metal in coal gangue: distribution ...

Sep 18, 2018 · Abstract. In the process of excavation and utilization of the coal gangue hill, gangue at different weathering degree was exposed to the environment, which can be harmful to the surroundings.

Investigation on the Activity Activation and Cementitious ...

Abstract The activity of coal gangue by thermal activation and composite activation technologies was investigated. The crystal composition, framework structure and morphology change were analyzed by XRD, FT-IR and SEM, respectively. The cementitious property of .

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Decision Tree classifier of coal & gangue Stack Areas ...

Coal & gangue stack occupation area, brining about land resources waste of mining area, is one of the geological disasters. At the same time, it leads to the resulting of spontaneous combustion of coal and waste rock, noxious liquid leaching, dust and natural radioactive and impacts on the environment of mining field seriously.

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Acoustic Emission and Ultrasonic Characteristics in the ...

Abstract. The acoustic emission (AE) characteristics, change law of the ultrasonic velocity, and internal failure mode of cemented waste concrete-coal gangue backfilling (CWCGB) with 600 days of curing time were studied under uniaxial loading conditions.

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