Composition of coal gangue

Composition of coal gangue

Thin films produced on 5052 aluminum alloy by plasma electrolytic

It is a highly alkaline insoluble solid containing preparation significant amount of elements such as iron silicon titanium The electrolytic solution was prepared with 5 g/ L of and aluminum7 9 Such characteristics suggest the red mud red mud potassium hydroxide and distilled water

Identification and Activation of Coal Gangue and SpringerLink

Mineralogical Composition of Coal Gangue The chemical composition of coal gangue sample by XRF analysis was shown in Table 1 The results show that the main chemical elements in the samples are silicon and aluminum and the total amount of other elements is less than % The mineralogical composition measured via XRD analysis shown in Fig 1

Compression of Aggregates of Acid Leached Coal Gangues Hindawi

As the coal gangues are primarily composed of silicate minerals such as kaolinite that produce alkaline solutions when dissolved hydrolyzed the neutralization reaction progresses more rapidly as the acidity of the solution increases

Coal Gangue Crushing and Screening JXSC Mine

Coal Gangue Meaning Coal Gangue is a kind of solid waste discharged from coal mining and coal washing It is also a kind of black gray rock with lower carbon content and harder than coal Its main components are Al2O3 and SIO2 In addition it contains various amounts of Fe2O3 Cao MgO Na2O K2o P2O5 SO3 and traces rare elements gallium

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

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

Microstructure of Coal Gangue and Precipitation of Heavy Metal Elements

2 The mineral compositions of fresh and weathered coal gangue are not significantly different In addition the main components are quartz and kaolinite along with some illite illite montmorillonite mixed layer and a small amount of chlorite siderite pyrite and so forth

Preparation and characterization of coal gangue geopolymers

The main mineral components of coal gangue include quartz kaolinite and muscovite In addition high temperature calcination weakens the diffraction peak of kaolinite and enhances the diffraction peak of quartz

What is gangue with example Explained by FAQ Blog

What are the types of gangue The dominant gangue minerals in VMS ores are quartz chlorite muscovite carbonates and sulfates mainly gypsum and barite What is an ore Class 10 Metals found in a combined state in the earth s crust are known as minerals

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

Frontiers Factors Affecting Brittleness Behavior of Coal Gangue

Coal gangue is the solid waste produced during the coal processing and causes serious environmental problems Lightweight concrete by making use of the coal gangue ceramsite as the aggregate has many advantages as the construction material The physical properties and chemical composition of CGCLWAC are given in Supplementary Tables S3 S4

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

Effects of Underground Coal Mining on Soil Spatial Water Content

Soil moisture content H 10 H 20 and H 30 and physical and chemical properties AN OP AK and OM showed pacific variation < CV < 1 indicating that the obvious changes of these properties used to estimate the impact of underground coal mining was meaningful Table 2 Surface Soil Data Overview and Kolmogorov Smirnov Inspection

Frontiers Recognition method of coal and gangue based on

Accurate identification of coal and gangue is very important for realizing efficient separation of coal and gangue and clean utilization of coal Therefore a method for identifying coal and gangue by using multispectral spectral information and a convolutional neural network CNN model is proposed First 200 pieces of coal and 200 pieces of gangue in the Huainan mining area were collected

Influence of coal gangue mulching with various thicknesses and Nature

Coal gangue occupies large swathes of land resources resulting in ecological fragility and various environmental problems influence the microbial community composition and function 17 18

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

Research on the fine identification of coal types and gangue based on X

The differences between the phase composition and the internal connection between the ADXRD pattern and EDXRD pattern of the samples were discussed and the conversion of ADXRD pattern to EDXRD pattern of coal and gangue was simulated the PSO SVM identification model of coal types and gangue was established

Fundamental study on the preparation of insulating ceramics via the

Table 1 lists the chemical compositions of the phosphate tailings and coal gangue SiO 2 % purity and Fe 2 O 3 % purity were purchased from Shanghai Macklin Biochemical Co Ltd Shanghai China Based on the composition characteristics of solid wastes anorthite and diopside were selected as the main crystalline phases of the ceramics because of their unique physical and

Coal gangue detection and recognition algorithm based on deformable

Using the coal gangue detection and recognition device built in the laboratory the trained SSD YOLOv3 YOLOv4 YOLOv5 and DCN YOLOv3 algorithm network models were adopted to detect coal gangue Figure 10 shows the effect of the detection of coal and gangue of three different sizes 4 6 6 8 and 10 12 cm The SSD network showed individual

Experimental study on the physico mechanical properties and

The chemical composition and content of the CG are shown in Table 2 The fly ash is selected from the first grade fly ash produced by a company in Henan province with a fineness of 8 % To study coal gangue foam concrete s mechanical properties and microstructure various materials such as CG FA cement and foam and their blending amounts

The Influence of Gangue Particle size and Gangue Feeding Rate on Safety

As a consequence of continuous improvement of material composition and processing technologies the material strength of the spring gradually increased from 900MPa to more than 2024 MPa [11 12] it was decided to recover 15601 working panel at Dongping coal mine using the gangue backfilling technique as shown in Figure 11b Figure 11

Study on High Temperature Behavior of Coal Gangue Based Geopolymer

Most coal gangue contains clay minerals with similar chemical composition to clay which can be used as raw materials for preparation of geopolymer and geopolymer concrete [3 4] The authors have used coal gangue as the main raw material to prepare coal gangue based geopolymer concrete and its basic mechanical properties were studied [5 7

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 %

IJERPH Free Full Text Tracing Sulfate Source and Transformation in

The coal gangue is mostly composed of sandstone mudstone sandy shale and trace amounts of low−S low−pyrite coal in Carboniferous and Permian strata [ 41 ] There are relatively thick unconsolidated Neogene and Quaternary strata in the study area with thicknesses of 186 291 m mean 238 m

Review of Coal Gangue Characteristics and Ecological Restoration

Coal gangue has become one of the industrial wastes with the largest annual discharge and accumulated stock in China The disorderly accumulation of coal gangue not only occupies a large amount of land resources and causes natural disasters but also pollutes the surrounding ecological environment which in turn affects human health and normal production and life

Study of Mechanical Properties and Durability of Alkali Activated Coal

The coal gangue powder was calcined in a muff furnace at a constant temperature of 700 °C for 2 h The main chemical compositions of precursors were analyzed by X ray fluorescence spectrometry XRF Table 1 The median sizes d 50 of the coal gangue and slag are µm and µm separately Table 1

How To Effectively Use Coal Gangue

There are several ways to use 1 Recovery of coal and pyrite Through a simple process good coal is washed from coal gangue low quality coal is selected from it through screening and pyrite is selected at the same time Or recover pyrite mixed coal and middling coal from the jig used for coal preparation ─ ─ plane shaker process

What is gangue with example

What is coal gangue 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

Hierarchical separating and grading method of coal gangue

The present disclosure provides a hierarchical separating and grading method of coal gangue and belongs to the technical field of coal gangue treatment and resource utilization According to differences in the composition and properties of coal gangue especially differences in Hardgrove grindability index HGI the present disclosure performs hierarchical crushing and screening to separate

Table 2 Microstructure of Coal Gangue and Precipitation of Heavy

Microstructure of Coal Gangue and Precipitation of Heavy Metal Elements Table 2 Chemical composition of coal gangue %

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