The environmental characteristics of usage of coal gangue in

It has been reported that the emission behaviors of toxic elements during combustion depended on such factors as elemental physical and chemical properties initial concentration and mode of occurrence Jak et al 1998 However previous studies of coal gangue making emissions were primarily focused on nbsp

Pyrite transformation and sulfur dioxide release RSC Publishing

11 Aug 2014 procedure is the emission of sulfur dioxide SO2 In this work the behavior of SO2 release during coal gangue calcination under an air atmosphere were systematically investigated and compared to the characteristics of SO2 evolution from pure pyrite calcination Results show that although sulfur in coal

Study of the technology of heat pipe on prevention wildfire of coal

Study of the technology of heat pipe on prevention wildfire of coal gangue hill Authors Deng Jun Li Bei Ding Ximei Ma Self ignitable coal gangue hill CGH is one kind of special combustion system which has the characteristics of low self ignite point large heat storage and easy reignition The currently industrial fire nbsp

Impact Crush Separation Characteristics of Coal and Gangue

14 Jul 2016 The influence of hardness and impact velocity on the crush ratio difference of coal and gangue was studied using an impact crush separator and was optimized using the orthogonal experiment method The equation of the impact crush separation characteristics of coal and gangue was obtained by means nbsp

Co combustion and emission characteristics of coal gangue and low

The reuse of coal gangue for energy recovery is developing rapidly in China due to its advantage in achieving both economic and environmental benefits Low quality coal is often added to elevate the calorific value of the fuel In this paper the combustion characteristics as well as pollutant emissions SO2 and NO of coal nbsp

Pyrolysis and Combustion behavior of Coal Gangue in O2 CO2 and

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 Pyrolysis experiments were nbsp

Combustion properties of coal gangue using thermogravimetryв

27 Jan 2017 Combustion properties of coal gangue using thermogravimetry–Fourier transform infrared spectroscopy Jun Deng a b Bei Li a b Yang Xiao a b Li Ma a b Cai Ping Wang a b Bin Lai wang c Chi Min Shu c a School of Safety Science and Engineering Xi 39 an University of Science and Technology Xi 39 an nbsp

a case study at yuquan coal mine in china

CO and H2S are selected as the index gases of spontaneous combustion because of the process and characteristics of spontaneous combustion in coal gangue dumps The abnormal surface areas of coal gangue dumps are then confirmed through the isotherm of land surface obtained using the Surfer software to process nbsp

Feasibility study on the application of coal gangue as landfill liner

22 Jan 2017 In the present study the feasibility of using coal gangue as landfill liner material is studied through a series of laboratory tests in terms of hydraulic conductivity sorption characteristics and leaching behavior The results indicated that the hydraulic conductivity of coal gangue could be smaller than the nbsp

Coal Gangue and Its Application Research in ProQuest Search

physical characteristics influence and application of coal gangue And then applications of coal gangue in cement based materials and new wall materials are illustrated as examples of application of coal gangue in building materials This section is composed of the following particular aspects l concrete application nbsp

Gangue Wikipedia

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 The estimated cost of nbsp

Analysis on Subsidence Deformation Characteristics of Coal

Based on laboratory dynamic triaxial tests the seismic subsidence deformation characteristics of coal gangue subgrade under cyclic dynamic loads are studied The formula of coal gangue 39 s seismic subsidence considering the confining pressure and dynamic stress is established based on experimental result The seismic nbsp

The hydrogeochemical characteristic of different sulfide IOPscience

The changes in the hydrogeochemical properties during the leaching experiments on gangue approximately 1500 coal gangue dumps in China that together contain a combined weight of four billion tons study aims to investigate the hydrogeochemical characteristics controlling the leaching of harmful substances from nbsp

Coal Preparation Technology Coal Preparation TechnoMine

The basic principle for coal preparation is to first liberate the coal particles from the gangue quartz and then by applying different water based techniques separate the coal particles and gangue particles Here also the ash content of products depends on the raw coal characteristics and customer specifications

Figures Tables Chinese Journal of Materials Research

21 May 2014 In order to deep understand the hydration characteristics of red mud coal gangue based intermediate calcium cementitious materials XRD IR TG DTA and MIP techniques were used to investigate the hydration products and pore structure of the hardened pastes which formed after a hydration process of nbsp

Release Characteristics of Heavy Metals from Coal Gangue under

Release characteristics of heavy metals from coal gangue under simulation leaching conditions Hongjian Zhang1 and Sailan Ouyang2 1School of Environment Science and Spatial Informatics China University of Mining and Technology Xuzhou 221008 Jiangsu 2Key Laboratory of Resource Exploration and Research nbsp

Application of EMD Based SVD and SVM to Coal Gangue Interface

14 Apr 2014 Coal gangue interface detection during top coal caving mining is a challenging problem This paper proposes a new vibration signal analysis approach to detecting the coal gangue interface based on singular value decomposition SVD techniques and support vector machines SVMs Due to the nbsp

Combustion Characteristics of Coal Gangue ACS Publications

16 May 2014 Combustion characteristics of coal gangue under O2 N2 mixtures with different O2 concentrations and coal mine methane CMM conditions were investigated by using thermogravimetric analysis TGA and tube reactor tests Calculation results for the combustion characteristic parameters show that nbsp

influence of coal properties on the co combustion characteristics of

13 Mar 2014 considerably reduced with an increase in the heating rate In addition the co combustion behavior of sewage sludge with coal gangue or coal were also conducted Xiao et al 2010 Liu et al 2006a 2006b reported that the combustion characteristics were different when the samples coal city mud and nbsp

Separation Of Gangue From Coal Based On Histogram CiteSeerX

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 nbsp

Combustion Characteristics of Coal Gangue under an Atmosphere

16 May 2014 ABSTRACT Combustion characteristics of coal gangue under O2 N2 mixtures with different O2 concentrations and coal mine methane CMM conditions were investigated by using thermogravimetric analysis TGA and tube reactor tests Calculation results for the combustion characteristic parameters nbsp

Enrichment of heavy metals in coal gangue by puff balls and

tential fertility of coal gangue dumps and to help its ecological reconstruction Bi et al 2006 conducted biotic reclamation of coal gangue abandoned matrix by inoculation of my corrhizal fungi and rhizobium The experimental re sults showed that the plant roots could improve the physical and chemical properties of the nbsp

Physical and chemical properties and distribution characteristics

Abstract Coal gangue is a solid waste with the largest emissions during the process of coal mining processing and utilization in Huainan mining areas Many coal emissions have caused worsening situations dealing with land occupation and the problem of ecological environment damage in mining areas The utilization nbsp

Flow Characteristics and Grain Size Distribution of Granular Gangue

19 Apr 2017 relation between flow properties of granular rocks e g mudstones sandstones and coal in different particle size and porosity 17–19 Previous reports in the literature for gangue usually focused on physical and chemical properties 2 static and dynamic characteristics 20 compaction properties 21 22 nbsp

Analysis on Explosion Characteristics of Coal Gangue Hills

In the process of the coal gangue hill explosion a lot of harmful gases can be released which seriously pollutes the atmospheric environment and is harmful to people 39 s health meanwhile equipments and the surrounding buildings can also be destroyed which brings huge economic losses and casualties In addition nbsp

Thermogravimetric Investigation on Co combustion Characteristics

Abstract In this work the combustion characteristics of coal gangue CG municipal refuse derived fuel RDF and their blends were investigated via thermogravimetric analysis Effects of the RDF on the whole co combustion process like the devolatilization ignition and burnout characteristics were analyzed The results nbsp

Thermogravimetric Assessment of Combustion Characteristics of

In this paper the co combustion behaviour of lignite coal with coal gangue and coal are investigated by a thermogravimetric analysis TGA in the temperature range from ambient temperature to 1000 The thermal characteristics and kinetics of lignite coal coal gangue and their blends are evaluated under combustion nbsp

Basic Characteristics and Effective Control of Gangue DPI Journals

Basic Characteristics and Effective Control of Gangue Piles in Mining Areas A Case Study JIXIONG ZHANG RUI GAO MENG LI SHENGGEN CAO and SHIWEI LIU 1State Key Laboratory of coal Resources and Mine Safety China University of Mining amp Technology Xuzhou 221116 China 2School of Mines Key nbsp

The Environmental Geochemistry of Trace Elements and Naturally

28 Aug 2014 The coal gangue is non combustible materials which are physically separated from bulk coal during coal mining activities The average gangue production ranges from 10 to 15 of the raw coal production which depends on the geological and mining characteristics The rapid development of coal nbsp

Sulfur as a parameter in the suitability assessment of gangue from

17 Oct 2016 Sulfur as a parameter in the suitability assessment of gangue from coal mining for reclamation of opencast excavation taking into the requirements One of the basic characteristic parameters which may be used to assess the suitability of aggregates for filling reclaimed opencast excavation is sulfur

Investigation of Hydraulic Mechanical Properties of Paste MDPI

1 Sep 2017 Abstract Backfilling is widely used to control surface subsidence and stope stability to improve pillar recovery Furthermore it is also an effective way to process and dispose of mining waste such as coal gangue and tailings In this study the hydraulic mechanical properties of cemented paste backfill

Chemical Characteristics of Coal Gangue as Filter Material in

Abstract In this research coal gangue was used as the main filler to deal with mine water in the simulated coal mine goaf its filtering effect and mechanism were analyzed and the filling characteristics were also analyzed and tested The results showed that the gangue exhibited good removal characteristics for turbidity nbsp

PDF only arXiv

If coal gangue mixed in industrial production will seriously affect the quality and efficiency of combustion So coal and coal gangue must be sorted before use The traditional sorting is mainly used by manual selection and mechanical separation Manual selection is not only costly but also seriously restricts the efficiency of

Research Article Effects of Fine Gangue on Strength Resistivity and

The cemented coal gangue backfill CGB in coal mining is normally made of gangue particle size of 0–15 mm fly ash cement and water In this study the effects of the weight content ranging from 20 to 60 of fine gangue 0–5 mm on the microscopic characteristics resistivity and compressive strength of CGB were nbsp

Sponge Iron WELSPUN STEEL LIMITED

The basic raw materials for the production of sponge iron are iron ore non coking coal and dolomite Sizing of the Raw materials also play vital role in sponge iron manufacturing process The required size of Iron ore MPS Mean particle size its physical properties like T I A I amp chemical properties like Fe T LOI gangue nbsp

The Application of Coal Cleaning Detection System IEEE Xplore

of coal and gangue particularly their gray scale values and the center of gravity By analysis of the characteristics of the image the system identifies the gangue The image processing is conducive to the follow up to discharge refuse treatment Keywords DSP FPGA real time image processing gangue identification

Potential ecological risk assessment and prediction of soil heavy

27 Jun 2014 Fernandes 1997 chemical speciation of heavy metals in coal gangue Dang et al 2002 pollution characteristics of heavy metal in soil Dragovic et al 2008 Luan et al 2008 and potential ecological risk assessment of soil heavy metals contamination around coal gangue piles Abdu et al 2011

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