By establishing a coal-gangue separation system based on the difference between coal and gangue in their surface texture and grayscale feature, this paper proposes a method of combining image ...

• Author: Wei HouGet Price

Coal gangue Interface detection (CGID) is not yet been solved on fully mechanized mining face. The working procedure of top-coal caving is programming controlled by electro hydraulic system, which determines coal caving time, recovery ratio of top-coal and the percentage of gangue content. To improve the coal recovery ratio, lots of

The activation process of alkali-activated coal gangue is as follows: Active SiO 2 and Al 2 O 3 in coal gangue dissolve under the action of strong alkali, followed by the polycondensation of silicon aluminum. Sodium ion that is used to balance the charge is absorbed into silica–alumina gel phases.

A field survey was conducted to investigate the metal contamination in coal gangue, soils, and crops (rice and soybeans), and to evaluate the possible health risks to the local population through food chain transfer near a coal gangue pile in the Guqiao Coal Mine, China.

Abstract: Based on the systematic analysis of the coal gangue in Weibei Coalfield, such as petrologic characteristics, chemical composition, nutrient elements, deleterious elements, and the transformation, and compared with the soil element content background values of Loess Plateau and national harmful materials controlling standards, we conclude that the coal gangue in the Weibei Coalfield has huge .

• Published in: Acta Geologica Sinica-english Edition · 2010Authors: Wang Tong · Wang Ying · Wang JunAffiliation: Xi an University of Science and TechnologyAbout: China[PDF]Get Price

However, some toxic trace elements in coal gangue should be paid more attention during the utilization of coal gangue. In this article, the modes of occurrence and the leaching characters of trace elements in coal gangue were introduced according to the result of the sequential extraction method and the leaching method.

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The environmental characteristics of usage of coal gangue in bricking-making: A case study at Huainan, China Chuncai Zhoua,b,c,d, Guijian Liua,b,d,⇑, Shengchun Wuc, Paul Kwan Sing Lamc,d a CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefe, Anhuii 230026, China

• Published in: Chemosphere · 2014Authors: Chuncai Zhou · Guijian Liu · Guijian Liu · Shengchun Wu · Paul K S Lam · Paul K S LamAffiliation: University of Science and Technology of China · Chinese Academy of Sciences · City .Get Price

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 - .

For example, in 2002, about 130 million tons of gangue were produced per year from coal mining in China. This, mixed with the 60 million tons of coal mud also produced, could be used for power generation; and the coal mining gangue could be combined with coal ash to produce building materials.

Combustion of coal gangue is extensively used for power generation in China. In this paper, pyrolysis and combustion characteristics of a low-rank coal gangue have been investigated under oxy-fuel (O2/CO2) and air (N2/O2) conditions using a drop tube furnace and thermogravimetric analysis.

Aug 01, 2016 · Read "Interactions of coal gangue and pine sawdust during combustion of their blends studied using differential thermogravimetric analysis, Bioresource Technology" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at .

Coal-gangue interface detection during top-coal caving mining is a challenging problem. This paper proposes a new empirical approach to detect the coal-gangue interface based on vibration signal analysis of the tail boom support of the longwall mining machine.

Ultimate Analysis Tests. Ultimate analysis tests produce more comprehensive results than the proximate analyses. SGS uses the results from ultimate analysis tests to determine the elemental composition of the coal including moisture, ash, carbon, hydrogen, nitrogen, sulfur, .

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

Aug 23, 2017 · Thermal behavior and kinetics analysis of coal-gangue sample selected from Inner Mongolia Autonomous Region in China were investigated by using thermogravimetry–derivative thermogravimetry, X-ray diffraction (XRD) analysis, and Fourier transform infrared (FT-IR) spectroscopy.

• Author: Yunpeng Wang, Yongfeng Zhang, Quan Zhou, Yinmin Zhang, Junmin SunGet Price

(2017) Analysis of Pollution Hazards and Comprehensive Utilization of Coal Gangue Energy and Energy Conservation 4, 90-91. 2 Li G.-F., et al. ( 2006 ) Coal Gangue Integrated Use Coal Technology 25, 116 - 118 . 3 Guan, J. and Li, Y.-S. (2008) Present Situation and Prospect of Comprehensive Utilization of Coal Gangue.

Dec 28, 2013 · The coal gangue image processing operations such as the denoising, enhancement, sharpening and edge detection were performed by using the rough set theory [4].

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 .

Coal gangue is an inevitable byproduct in the process of coal mining. With the development of the coal mining industry in recent years, the heavy-metal pollution

Firstly the image of coal or gangue is preprocessed. Then the mean value of gray histogram is extracted which serves as the statistical feature value to initially recognize coal and gangue. Then the textural feature is extracted from the image which is based on an adaptive window of texture analysis.