Frontiers Recognition method of coal and gangue based on

the main research objectives of this study are as follows 1 to analyze the identification ability of multispectral spectral analysis combined with 1d cnn for coal and gangue 2 compare the recognition effect of 1d cnn with different structures to select the best structure 3 reasonably set the optimizer activation function and network depth …

Effects of Underground Coal Mining on Soil Spatial Water Content

Xu researched on the spatial variation distribution of soil composition and it WHC and pH had been obsd in fly ash than coal gangue reconstructed soil Soil microbial biomass C MBC and N MBN MBC/TOC total org carbon ratio qmic were higher under the influence of the fly ash while contents of As Cr C/Nbio the basal

Minerals Free Full Text Study on Macro Meso Deformation Law and

The digging gangue taken from Datun Coal and Power Group was used in this experiment The lithology of the gangue was sandstone and the mineral composition was obtained by the gangue test As shown in Table 1 the gangue specimen contains a high content of SiO 2 which is the skeleton

Effect of Concentration and Suspension Agent HPMC on Hindawi

Cemented coal gangue fly ash backfill CGFB mixtures are utilized as the filling materials for backfilling the underground openings in coal mines The freshly prepared CGFB slurries are commonly transported into the gobs through a pipeline The mixture ratio of slurry concentration and suspending agent HPMC plays an essential role in transporting the slurry to goaf smoothly and efficiently

Research on influence of coal gangue on ecological risk in grassland coal mining area Design Institute of Geology for Mineral Resources Testing Center of China National Administration of Coal Geology Laboratory of Coal Resources and Mineral Resources China National Administration of Coal Geology of Earth and

What is gangue with example Explained by FAQ Blog

Coal gangue a solid waste generated during coal mining and washing accounts for approximately 10% 15% of the total coal production The accumulative amount of coal gangue is largely increasing associated with coal mining activities becoming one of the largest industrial residues What is froth flotation 12

Chemical compositions of coal gangue and sewage sludge

The columns were made of cemented gangue fly ash backfill material CGFBM and only one column has stirrups The failure characteristics of the CGFBM columns were monitored by photography

Physicochemical Properties and Thermal Activation of Coal Gangue in

The results showed that coal gangue has the characteristics of high silicon content high iron content in Liupanshui mining area Coal gangue was heated to 800 ℃ for 4 h the mineral composition of kaolinite crystal structure has damaged to generate Metakaolinite amorphous SiO 2 and Al 2O 3

Trace Elements in Coal Gangue A Review IntechOpen

Generally the main mineral phases of coal gangue are kaolinite quartz pyrite illite calcite ankerite and montmorillonite [ 36 37 ] The coal gangue samples are usually dominated by silicon dioxide and aluminum oxide followed by ferric oxide and potassium oxide accompanied with some trace elements [ 37 ]

Application Fields And Characteristics Of Coal Gangue Machine made Sand

The angularity and rough surface characteristics of coal gangue machine made sand make the cohesive force and mechanical occlusion force between particles greater than natural sand making it stronger against disturbance and cracking and can be used in bridge deck and road repair projects The slump and expansion of the high strength concrete

Softening and Melting Characteristics of Self Fluxed Pellets With and

On the contrary it Besides the composition and quantity of gangue and the did cause some irregularities in the furnace operation 3 structures of pellets the process also depends on the quan high pressure drop cross the burden column unstable per tity of wustite and the quantity of the additional fluxes

Field study on the improvement of coal gangue filling using PLOS

Coal gangue is a loose deposit with unique particle structure and composition The physical and mechanical properties of coal gangue compaction are significantly different from other loose materials The theoretical research on DC method is in development stage and is primarily carried out on soil with varying traits

Influence of coal gangue mulching with various thicknesses and Nature

The coal gangue was crushed by using a steel hammer after which it was mixed fully then four particle size groups were divided by using stainless steel sieves cm P1 1 cm P2

Mineralogical Characteristics and Calcination Composition Changes of

Iron impurities mainly existed in pyrite with a content of % Calcination test of coal gangue shows that Pyrite began to be oxidized at 850 ℃ to form hematite When calcined at 1 000 ℃ for 2 hours the carbon content in coal gangue was reduced to below % and the sulfur content was also reduced to %

Synergistic analysis of co combustion of sunflower straw and coal gangue

in general the synergistic effects of coal gangue and sunflower straw is mainly derived from three aspects 1 the effects of different components including volatile matter fixed carbon and ash composition 2 secondary reaction between pyrolysis products including free radical reaction and gasification reaction li et al 2024 and 3 …

How a Roller Crusher Crush Coal Gangue Fote Machinery

Coal gangue contains various elements especially rare elements and the highest content of chemical components is SiO 2 and Al 2 O 3 There are three main types of coal gangue for chemical use the first is to extract a rare element in coal gangue by various methods such as Ga Se Ti Co etc

PDF Research and analysis of working conditons in industrial

The first part of the monograph is dedicated to the issues of optimising human functioning in the contemporary work environment from the perspective of work and organisational psychology

Common Industrial Uses of Coal Gangue Gravel Mill

The mineral phase composition of gangue is mainly quartz montmorillonite kaolinite and illite and it can be used as a cheap adsorbent after pretreatment Recommendation Of Coal Grinding Equipment MTW European Grinding Mill is innovatively designed through deep research on grinding mills and development experience

Preparation of coal gangue ceramsite high strength concrete and

Although the chemical composition of CG is complex CG is mainly composed of silicon and aluminum and contains more than a dozen elements Generally CG is mainly composed of oxides such as SiO 2 Al 2 O 3 Fe 2 O 3 CaO MgO NaO and K 2 O 20 22 Calcined CG is an effective method for improving the aggregate properties

Glover 1980 An Introduction to Coal Technology Berkowitz N

ABSTRACT Gilsonite is a natural brittle and glisten tar hydrocarbon which widely uses in the chemical paint and oil industry besides asphalt production and thermal insulation Major gangues of Gilsonite are gypsum pyrite silica dolomite calcite and shale which are known as ash

Coal Gangue Interface Detection Based on Ensemble Empirical Mode

It is found that when coal and gangue fall the characteristics of vibration signals generated by coal and gangue shocking the tail boom are different First EEMD algorithm is used to decompose the original vibration signals into intrinsic mode functions IMFs Each IMF represents the distribution of energy from high to low

Source apportionment and ecological health risks assessment from major

Mine wastewater and coal gangue leaching are responsible for the health risk from As for children The chemical composition of multi aquifer groundwater reflects a combination of sources and processes including mine wastewater and surface agricultural pollution 2 As and Co are the dominant elements contributing to non carcinogenic risk

Utilization of coal gangue for the production of brick

The minerals identified in the coal gangue include kaolinite Al 4 Si 4 O 10 OH 8 quartz SiO 2 muscovite KAlSiO 3 AlO 10 OH 2 calcite CaCO 3 dolomite CaMg CO 3 2 and illite K Al 2 Si Al 4 O 10 OH 2

Study of the composition and properties of the beneficiation tailings

The increase in demand for rare earth metals and the depletion of natural resources inevitably causes the need to search for alternative unconventional sources of rare metal raw materials The article presents the results of a study of the composition and properties of the beneficiation tailings of currently produced loparite ores Sieve mineralogical chemical and radionuclide analyses were

Sustainability Free Full Text Overlying Strata Movement and Mine

The mechanical properties of gangue paste filling materials were studied through laboratory tests and the critical conditions for bending and fracture of the coal seam roof were analyzed Discrete element numerical simulation software was used to study the fracturing process of the roof and the reasonable filling rate to ensure roof stability

Study on Spontaneous Combustion Characteristics of Waste Coal Gangue

The coal gangue at the depth of m gradually developed into the fire source of spontaneous combustion Due to the continuous heating by the heat generated at the depth of m and the sufficient conditions of oxygen supply and heat storage the coal gangue at the depth of m was ignited

Valorization of calcined coal gangue as coarse ScienceDirect

Table 1 reveals that the main chemical compositions of CGA raw are SiO 2 % and Al 2 O 3 % In addition CGA raw contains a small amount of Fe 2 O 3 % CaO % carbon and organic matter and its loss of ignition is %

Energies Free Full Text Sulfur Conversion of Mixed Coal and Gangue

Coal gangue is a carbonaceous rock produced by coal during the washing process It is characterized by a large amount of SiO 2 and Al 2 O 3 and metal oxides such as Fe 2 O 3 CaO and MgO The sulfur content of coal gangue is within 1 3% which is classified as medium high sulfur coal

Coal Gangue Vertical Roller Mill

The chemical composition of coal gangue is mainly composed of organic combustibles and inorganic compounds Inorganic substances mainly refer to SiO 2 40% 60% AlO 3 15% 30% a small amount of Fe 2 O 3 CaO MgO Na 2 O K 2 O and other inorganic components Organic combustibles mainly refer to the ash of coal crushed stone

Are tailings and gangue the same thing

Coal gangue a solid waste generated during coal mining and washing accounts for approximately 10% 15% of the total coal production The accumulative amount of coal gangue is largely increasing associated with coal mining activities becoming one of the largest industrial residues composition and atomic structure Rocks are generally