Coal gangue

Coal gangue

Synthesis of zeolite SSZ 13 from coal gangue via ultrasonic

Using coal gangue as raw material to synthetize zeolite has been considered as an environmentally friendly and effective alternative to solve the issues of accumulation and pollution which also improves the added value of coal gangue The ultrasonic assistance has been proven to be one of the potential pretreatment methods to promote the

Design and Properties of Coal Gangue Based Geopolymer Mortar

The feasibility of preparing coal gangue based geopolymer mortar CGBGM with composite activated coal gangue was experimentally explored in this paper The effects of water to binder ratio W/B alkali content A and slag content S on the fluidity and performances of the CGBGM were experimentally investigated The ANOVA method was

Multi Arm Global Cooperative Coal Gangue Sorting Method Based on

The existence of coal gangue seriously restricts coal selection rates and quality so the separation of coal gangue is a vital step in coal production and is an important method of improving coal quality [1 2] The existing coal gangue sorting methods have problems such as high labor intensity of workers serious waste of water resources and

Release characteristics of heavy metals in high sulfur coal gangue

Coal gangue HS CG is the dark gray rock produced during coal mining and washing process and its production is about 10% 15% of coal mining which depends on the geology and mining conditions Zhu et al 2024 Bai et al 2024 Due to the utilization of coal resources in the world lead to the accumulation of HS CG also increased year by

Coal Gangue Crushing and Screening JXSC Mine

Coal gangue is a kind of pollution sources which produced in coal mining It can recycle via coal gangue crushing and screening The gangue discharged from coal mining is composed of various kinds of rocks the hardness and calorific are different Analyzes the effect that different crushers machine crushing gangue Coal Gangue Meaning

Design and Properties of Coal Gangue Based Geopolymer Mortar

Coal gangue is the associated solid waste of coal and one of the largest solid industrial wastes worldwide It was reported that coal gangue occupies approximately 15 20% of the total coal output and its emission exceeds 7 billion in China [ 1 2 ]

PDF Identification of Coal and Gangue by Feed forward Neural Network

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

Enhancement of coal gangue performance by surface micro crystalline

Coal gangue is a waste derived from coal mining and its unreasonable disposal usually causes serious land occupation and environmental pollution Using coal gangue as a substitute for natural aggregate is an effective recycling approach however the high water absorption and high crushing rate of …

Coal gangue processing

The coal gangue after the second stage crushing and screening is transported by the belt conveyor to the vertical impact crusher for further crushing and shaping until the customer needs the the finished coal gangue has requirements on the powder content it can be sent to a sand washing machine for cleaning or processed by a coarse

Utilization of coal gangue as coarse aggregates in structural concrete

The major constituents of the coal gangue are SiO 2 and Al 2 O 3 The chemical composition of the coal gangue is similar to that of natural gravel Table 2 indicates that using coal gangue as the replacement of natural gravel as coarse aggregates in concrete is possible

Coal Gangue and its Application Research in Building Materials

this section is composed of the following particular aspects 1 concrete application replacement of cement by 20% coal gangue can effectively extend the setting time increase the compressive strength and has little influence on workability 2 grouting material application coal gangue can completely substitute filling material used in …

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 Despite coal gangue having mineral elements similar to those in soil

coalbed methane Translation into Chinese examples English Reverso

Article 55 Where a power grid enterprise in violation of the provisions of this Law refuses to buy the electricity which is generated by enterprises through the use of residual heat and residual pressure coalbed methane and fuels of low heat value such as gangue slurry and garbage the electricity regulatory authority of the State shall order it to rectify within a time limit if losses

Study on condition analysis and temperature prediction of coal

In order to measure the linear relationship between gas concentration and coal temperature we carried out simulation experiments on a small amount of mixed coal samples and measured the gas concentration produced after oxidation when coal is combined with the natural environment and the temperature of coal samples at this time as shown in Figs

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 has different electromagnetic parameters different volumes and different shapes

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

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

Therefore this paper takes the main coal types including one third coking coal gas coal and gangue in Huainan coalfield as the research object and proposes a method to identify coal types and gangue The ADXRD patterns and EDXRD patterns of the samples were obtained through X ray diffractometer and EDXRD test platform respectively

An identification and positioning method for coal gangue based on

The intelligentization of coal mines is the only approach to the high quality development of the coal industry Detection identification and sorting of coal gangue is an important part of the

Study on capillary water absorption properties of polypropylene fibre

Coal gangue is the largest solid waste produced by coal mines accounting for about 10% of coal production The annual emissions of coal gangue in China is about 150 200 million tons Coal gangue causes solid liquid and gas pollution which not only wastes resources energy and occupies a large amount of land but

Materials Free Full Text Application of Coal Gangue as a Coarse

The physical and chemical properties of rock and spontaneous combustion coal gangue are generally suitable for being used as a coarse aggregate in green concrete Coal gangue concrete is not recommended to be used in subsurface structures as its water absorption law would be changed under a large replacement ratio

Multispectral Imaging A New Solution for Identification of Coal and Gangue

That is the difference in imaging between coal and gangue at nm is greatest Finally the performance of the proposed model for the identification of coal and gangue was carried

Carbon Footprint Analysis of Coal Gangue in Geotechnical Engineering

Coal gangue is a mine waste generated during the mineral processing phase of coal production With the surge in demand for coal in thermal power steel and cement generation industries the rate of coal gangue generation has reached unprecedented heights

Energies Free Full Text Sulfur Conversion of Mixed Coal and Gangue

The construction of a power plant using a 660 MWe supercritical circulating fluidized bed CFB boiler with co combustion of coal and gangue has been proposed in China Therefore this study simulated the distribution law and transformation mechanism of sulfur containing phases using three low calorific samples of gangue and coal mixtures under different conditions based on the thermodynamic

Using Chinese Coal Gangue as an Ecological Aggregate and Its

Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications Producing concrete with coal gangue aggregate is one of the green sustainable development requirements This paper reviews the properties and preparation methods of Chinese gangue aggregate studi …

Selective extraction of aluminum from coal bearing kaolinite by room

DOI / Corpus ID 102878231 Selective extraction of aluminum from coal bearing kaolinite by room temperature mechanochemical method for the preparation of γ Al 2 O 3 powder

Experiment on Space Time Evolution Characteristics of Deformation and

Revealing the space time evolution characteristics of overlying strata deformation and failure is the key for safe and efficient mining of steeply dipping coal seam In this paper based on the

Coal Gangue and its Application Research in Building Materials

The current statistics show coal gangue discharge is 100 million tons per year and the accumulated discharge has been as high as billion tons It comprises the largest portion of solid waste in our country Its storage not only requires valuable land resources but also pollutes the air water and soil of the storage sites resulting in waste of resources

What is gangue with example Explained by FAQ Blog

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

Release characteristics of heavy metals in high sulfur coal gangue

Coal gangue HS CG is the dark gray rock produced during coal mining and washing process and its production is about 10% 15% of coal mining which depends on the geology and mining conditions Zhu et al 2024 Bai et al 2024 Due to the utilization of coal resources in the world lead to the accumulation of HS CG also increased year by year Zhang et al 2024

An efficient method for recognition of coal/gangue with thermal imaging

Further comparative study revealed that coal and gangue can obtain the optimal contrast image when the water temperature is 55℃ for 15s with air motion intervention which might be a novel way to increase the efficiency of coal and gangue identification in coal mines KEYWORDS Coal gangue thermal image temperature difference recognition efficiency

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