Remote Sensing Free Full Text Remote Sensing Monitoring of

After the regreening of the open pit mine dump vegetation usually needs to be managed and protected manually for several years before it reaches stability Due to the spontaneous combustion of coal gangue surface collapse and other reasons secondary damage may occur at any time Regreening monitoring plays a vital role in the restoration and reconstruction of the mining ecosystem and can

What is the new coal gangue grinding mill Quora

Coal powder is anthracite lean coal lean coal coking coal fat coal gas coal weakly caking coal non caking coal long flame coal lignite etc It is mainly used to provide heat after combustion and can be used for power generation and steam generation daily heat source heating and so on

Classification of coal and gangue under multiple surface conditions via

Dou et al [16] [17] presented a method of classifying coal and gangue under four conditions raw coal with a dry clean surface a wet clean surface a dry surface covered with slime and

A density map regression method and its application in the coal

Flotation is a critical technology in fine coal separation used to separate coal and gangue The current monitoring and control of flotation mainly rely on the operators observing the froth in the flotation tank and intuitively regulating its flotation conditions In contrast to the classification based baseline the density map regression

Physicochemical Problems of Mineral Processing nr 41 2024

Formation of hydrogen peroxide H2O2 an oxidizing agent stronger than oxygen by sulphide minerals during grinding was investigated It was found that pyrite FeS2 chalcopyrite CuFeS2 sphalerite Zn Fe S and galena PbS which are the most abundant sulphide minerals on Earth generated H2O2 in pulp liquid during wet grinding in the presence or devoid of dissolved oxygen in water and

Copper Processing Multotec

The underflow is sent to a secondary ball mill and trommel screen for additional grinding and classification Using froth flotation the copper minerals separate from the gangue and rise to the froth layer of the flotation cell In turn the copper rich bubbles are removed or transferred to the next stage of flotation for further processing

Coal and Gangue Recognition Method Based on Local Texture MDPI

Coal gangue or gangue is a kind of black or gray solid waste discharged in coal mining and coal washing Compared to the widely used fossil fuel gangue provides much less energy supply and contains less value due to lower carbon content It can also be a pollution source in the absence of proper treatments [ 1 ]

Control effect of coal mining solid waste backfill for ground surface

The CPB specimens were made of coal gangue and cement with or without the addition of fly ash the damage classification for brick and concrete structures with a length within the deformation seam below 20 m The allowable ground surface deformation values are as follows horizontal deformation ± 2 mm/m inclination deformation ±

Electromagnetic wave forward modeling of coal gangue mixed model in top

The automatic control of top coal caving is of great significance to realize intelligent coal mining In the process of top coal caving a coal gangue mixed area containing coal gangue and air is formed at the tail beam of the hydraulic support which

Coal and gangue identification method based on the intensity PubMed

Coal and gangue rock identification is the essential process in a coal preparation plant In an actual coal preparation plant the existing classification methods have many disadvantages in safety and identification rate We utilized the echo intensity image EII of lidar for coal and gangue iden …

A Bayesian optimal convolutional neural network approach for

The precise classification of coal and gangue is a crucial link for effective sorting and efficient utilization However there are some shortcomings in traditional methods such as water consumption coal slime pollution and great influence of environmental factors and so on Here multispectral imaging technology combined with the convolutional neural network CNN was applied to classify

What Are The Uses Of Coal Gangue Powder Professional Coal Gangue

It is also growing at the rate of 150 million tons per year It is very important to find the use of coal gangue grinding mill or coal gangue Properties and classification of coal gangue From the definition of coal gangue we can know that coal gangue is a large category of solid waste So what are the main chemical components of coal gangue

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Multi dimensional analysis and recognition method of coal and gangue dual energy X ray images the relief algorithm is used to measure the importance of each feature parameter and then some classification experiments are fat coal coking coal gas coal and gangue from different areas as experimental samples

Classification of coal and gangue under multiple surface conditions via

An image processing based method for Accurately positioning and identifying coal and gangue under the heterogeneous and complex scenarios of coal production is proposed and a positioning and identification system is developed 10 Coal and Gangue Recognition Method Based on Local Texture Classification Network for Robot Picking

EPC Mining Equipment Mineral Processing Smelting Engineering China

Automatic intelligent ore sorting machine is applicable to multiple mineral species including non ferrous mineral ferrous mineral non metallic mineral radioactive mineral and coal etc It s widely used in pre sorting ore classification waste extraction gangue separation from lump coal and other links

Gasification and activation behaviors of coal gangue with Na2

a The XRD spectra of gangue gasification ash with Na2 CO 3 additions at 900 °C kaolinite Al2 Si 2 O 9 quartz SiO 2 ★ nepheline Na Al Si O 32 sodium aluminum silicate NaAlSiO 4 b The changes of minerals content with Na 2 CO 3 additions

Types and classification of coal Mining for schools

Lignite or brown coal the lowest rank of coal used almost exclusively as fuel for electric power generation Jet is a compact form of lignite that is sometimes polished and has long been used as an ornamental stone Coal classification Use of coal Thermal coal Other name steam coal Burnt to generate electricity via steam Metallurgical

several types of coal crushers

Rock Jaw crusher In application Of coal Industry Types of Crushers Mineral Processing Metallurgy Crushers may be divided into three general classes with respect to the manner in which they do their work Pressure Crushers This category embraces the several types of gyratory crushers and jaw crushers as well as the double crushing rolls with either smooth or corrugated shells

Feature extraction and classification method of coal gangue acoustic

Feature extraction and classification method of coal gangue acoustic signal during top coal caving [J] Journal of Mining Science and Technology 2024 6 6 711 720 doi

A Bayesian optimal convolutional neural network approach for

Two different methods CNN and SVM were used to classify coal and gangue An excellent parameter optimization method Bayesian optimization was used to explore the ability of automatically optimizing the hyperparameters of CNN The experimental flow chart of this paper is illustrated in Fig 3 Download Download high res image 559KB

Coal and gangue identification method based on the intensity Optica

In an actual coal preparation plant the existing classification methods have many disadvantages in safety and identification rate We utilized the echo intensity image EII of lidar for coal and gangue identification for the first time to the best of our knowledge and achieved outstanding recognition results with a convolutional neural network

Characterization of Heavy Metals from Coal Gangue SpringerLink

The crushed portion of coal gangue was uniformly mixed to make a representative sample of 1 kg for performing sieve analysis test The particle size distribution curve of the samples used in the study is presented in Fig 1 Based on the Unified Classification system USC the coal gangue samples are comparable to silty sands SM

Study on Plants Community Succession in Land for Coal Gangue Dump in

On the base of site classification and site quality evaluation of land for coal gangue dump LCGD in Fushun mining area the plants community succession of LCGD were systematically researched and analyzed The relationship between dominant plants community succession distribution and soil fertility was studied It was achieved that there existed the regularity of soil fertility influence on

David M Kahumbi on LinkedIn 𝕍𝔼𝕀ℕ𝕊 In the metamorphic rocks and

𝕍𝔼𝕀ℕ𝕊 In the metamorphic rocks and igneous rocks minerals are found in cracks joints The small cracks are called veins and large cracks are called…

Identification and Activation of Coal Gangue and SpringerLink

Coal gangue is a rock mixed with organic and inorganic compounds co deposited with coal during coal formation Usually in a thin layer and in the coal seam or in the top and bottom of the coal seam gangue is typical solid waste discharged when coal is excavated and washed in the production In China the total of accumulative stockpile of coal

18 Support sections of partial chambers in coal gangue separation chamber group in Xinjulong Coal Mine Discussion on the span classification of large span cavern and the span effects[J] Chinese Journal of Underground Space and Engineering 2024 11 1 39 47

Classification of coal coal gangue and gangue based on dry basis gross

Guizhou is a great coal producing province in China its coal annual output are more than ×108 tons and steam coal are over 7×107 to lower electricity price the coal price between Guizhou Province and other provinces has great s common to see that large amount of coal gangue gangue and other impurities mixing in commercial resolve this problem precisely

Molecules Free Full Text Thermal Activation of Coal Gangue with Low

The main chemical composition of CG is Al 2 O 3 and SiO 2 and CG can be classified into high Al/Si ratio CG and low Al/Si ratio CG [ 8 ] Up to now the CG with high Al/Si ratio is effectively applied on alumina production [ 9 10 11 ] However the CG with low Al/Si ratio hardly obtains large scale application

Mechanical Properties and Drying Shrinkage of Alkali Activated Coal

The compressive strength splitting tensile strength axial compressive strength and elastic modulus of the AACGC were times times times and times those of the OPCC respectively With the increase in concrete strength grade the mechanical properties of the AACGC have gradually increased

Micromachines Free Full Text YOLOv4 Tiny Based Coal Gangue Image

Nowadays most of the deep learning coal gangue identification methods need to be performed on high performance CPU or GPU hardware devices which are inconvenient to use in complex underground coal mine environments due to their high power consumption huge size and significant heat generation Aiming to resolve these problems this paper proposes a coal gangue identification method based on