wet coal gangue

Microstructure of Coal Gangue and Precipitation of Heavy …

2017-11-23 · The microstructure and mineral composition of the gangue play a decisive role in the precipitation of heavy metal elements. In this study, the microstructure, mineral composition, and precipitation of heavy metal elements of coal gangue with different weathering degrees were analyzed through electron microscopy, X-ray diffraction, and static immersion leaching …

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Preparation and characterization of glass–ceramic foams …

2015-9-26 · Coal gangue and waste quartz sand in the present experiment were supplied by Ningxia Shizuishan Mine (Group) Co. Ltd. As shown in the Table 1, coal gangue, waste quartz sand and sintering additives mixed with different mass ratios, labeled SC1, SC2, SC3, SC4, SC5, were studied. The compounds were wet-milled in a conventional ball mill for 240 ...

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Coal Gangue | Scientific

The results indicate that coal gangue waste can be efficiently treated at 850°C in less than 30min to obtain pozzolanic activity of 108% at 7 days and 124% at 28 days. And an industrial product also shows similar improvement in pozzolanic activity to the lab results, and indicates the potential for producing eco-efficient cementitious materials.

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Review of Coal Gangue Characteristics and Ecological …

2021-5-1 · 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 …

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Coal gangue detection and recognition algorithm based …

2021-9-8 · 4.1 Design and implementation of coal gangue detection and recognition device. This study proposes an method for coal gangue detection and recognition on the basis of the DCN-YOLOv3 algorithm. Firstly, the method collects real-time video images of a conveyor belt operation through an industrial camera erected perpendicular to the conveyor belt.

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Sustainability | Free Full-Text | Utilization of Coal Gangue …

2020-6-4 · This study compares the technical properties between wet and soft loess and Zezhou coal gangue to demonstrate the technical benefits of using coal gangue as railway backfill. Based on the developed technology [ 51 ], the Xi''an Railway Survey and Design Institute adopted the dynamic compaction method to dispose of the collapsible loess.

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Research on methods to differentiate coal and gangue …

2018-7-26 · Early investigations on coal-gangue detection were mainly focused on designing eigenvectors to reveal differentiation between coal and gangue; these were based on image processing (e.g., gray ...

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Eco-friendly treatment of coal gangue for its utilization as ...

2021-2-20 · Using coal gangue (CG) as supplementary cementitious materials (SCMs) is believed to be one of the effective strategies for CG disposal. While the low reactivity of CG restricts its large-scale applications. To increase the reactivity of …

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Influence of coal gangue mulching with various …

2021-7-28 · Coal gangue occupies large swathes of land resources, resulting in ecological fragility and various environmental problems. ... The valve was opened, and the time at which the wet peak passed the ...

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How To Effectively Use Coal Gangue?

Eco-friendly treatment of coal gangue for its utilization

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Gasification and activation behaviors of coal gangue with …

2022-4-1 · The Xiaoyu coal gangue (XCG) was collected from Shuozhou, Shanxi province, China, the coal sample was crushed and sieved to 200 mesh and dried at 110 °C for 24 h, whose main mineral composition was shown in S 1 (Supplementary material S 1). ... Decomposition of NO x precursors during gasification of wet and dried pig manures and their composts ...

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Study on the Parameter Optimization and Strength …

2020-7-28 · It can be seen from Table 3 that this type of coal gangue is a low-calcium mineral with high contents of SiO 2 and Al 2 O 3 and potential high activity. Based on the experiment specification of activity index test of coal gangue (GB/T17671-1999), the coal gangue was prepared into coal gangue cement mortar, and the cement mortar was used as the reference …

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Study on Water Stability of Dry and Wet Circulation of …

Abstract: As one of the large industrial solid waste,coal gangue not only occupies a lot of land resources,but also seriously threatens the natural ecological environment of China order to treat and comprehensively utilize coal gangue and reduce its adverse effects,domestic and foreign scholars have carried out in-depth research on the comprehensive utilization of coal …

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Trace Elements in Coal Gangue: A Review

2017-12-20 · The coal gangue samples were collected from the Xinzhuangzi Mine, China. Eight combustion temperatures (500, 600, 700, 800, 900, 1000, 1100, and 1200°C) were selected to study the trace elements behavior during coal gangue combustion. The coal gangue sample was placed in a muffle roaster at determined temperature and sustained a time of 30 min.

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Wet Coal Gangue Crusher Manufacturer Madagascar

2021-9-18 · Coal gangue hammer crusher hammer crusherstone coalgangueglasshammer crusherstone coalgangueglass breaker 220v 1500w 200kgh 72105 wet coalcrusher small hammer crusherbroken coal testing equipment 220vfunction1 widely used applicable to coal electricity scientific research and other industries and sectors.

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Application of Coal Gangue as a Coarse Aggregate in …

2021-11-11 · Along with the excavation and washing of coal in the production process, large amounts of rock-like coal gangue (CG) accompanying the carboniferous beds are discharged as industrial residues, accounting for around 10–20% of the coal production [2,3,4] the largest coal production country, namely China, more than 700 million tons of coal gangue was expected in …

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The use of modified coal gangue for the remediation and …

2021-1-15 · Abstract Thermally activated coal gangue and lanthanum-modified coal gangue were prepared by thermal activation and hydrothermal methods, respectively. Their structures and properties were characterized by X-ray diffraction (XRD), attenuated total reflection flourier transformed infrared spectroscopy (ATR-FTIR) and transmission electron microscopy (TEM). …

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A concrete material with waste coal gangue and fly ash …

2016-1-20 · Note that the trace elements in the selected coal gangue were within the range of background values of the world coal gangue (Ketris and Yudovich, 2009). The total quantity of the coal gangue and fly ash per square kilometer of farmland is 2558 kg according to Table 2, which is less than the stipulated 450,000 kg hm −2 regulated in the ...

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Investigation on the activation of coal gangue by a new …

2010-7-15 · 1.. IntroductionCoal gangue is a complex industrial solid waste discharged when coal is excavated and washed in the production course. Its major chemical composition is SiO 2 and Al 2 O 3, and its major mineralogical composition is quartz and feldspar .The amount of coal gangue accumulated in China has already reached 3.8 billion tons; moreover, the stockpile of gangue …

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Study on capillary water absorption properties of …

2020-1-20 · 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 also pollutes the ...

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Multitechnique investigation of concrete with coal gangue

2021-9-1 · The experimental results showed that coal gangue has a hierarchical structure, wide pore distribution, and poor mechanical properties in microcosmic. Compared with ordinary concrete (OC), both the ...

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How To Effectively Use Coal Gangue?

2021-10-13 · 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.

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Evaluation of modified permeable pavement systems with …

2020-12-7 · Coal gangue (CG) is generated during coal mining activities. About 15–20% of CG by weight of the total coal output is discharged during its production. CG has become a primary environmental concern around the world (Zhang & Ling 2020). It was reported that 175 million tons of coal waste have been stocked in dumps for decades in Europe.

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Evaluation of coal gangue and ash for calcined kaolin …

2013-8-21 · For comprehensive utilization of solid waste, coal gangue, slag of CFB and washed fly ash provided by a coal mine were evaluated on their potential as calcined kaolin. Studies on these samples include the determination of chemical composition by ICP, the analysis of mineralogical construction by XRD, orthogonal experiments of iron leaching by acids and …

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Controlling water temperature for efficient coal/gangue …

2021-12-1 · 1. Introduction. Coal is the most important fossil fuel resource in China [1,2] 2020, China''s coal production reaches 3.9 billion tons. Gangue is black-gray solid wastes that were mixed in coal, which play a detrimental role during production and reduce the economic value of coal [], especially when mining thick seams (e.g. 10 m–20 m) with longwall top coal caving …

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Research on the Ecological Protection of Coal Gangue …

2021-11-18 · To improve the ecological protection of coal gangue slopes, this work developed a polymer curing agent using a pure acrylic emulsion and cement as the main raw materials. By testing the workability, waterproofing, durability, and adhesion of the curing agent with different polymer-to-cement ratios, the optimum mixing ratio of the polymer curing agent was obtained, …

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Coal Gangue Factory, Custom Coal Gangue OEM/ODM …

Timber Wet Sawdust Mine Cow Dung Coal Gangue Silicon Carbide Drying Machine Dryer. Timber Wet Sawdust Mine Cow Dung Coal Gangue Silicon Carbide Drying Machine Dryer. Unit Price: US$ 35000-150000 / Piece Min. Order: 1 Piece Add to Inquiry Basket. China Professional Supplier 2021 Hot Sale Single Cylinder Hydraulic Cone Crusher Hydraulic Pressure ...

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China Coal Gangue Industry Market Research and ...

2014-5-23 · English Service: +86 0755 33220413. Chinese Service: +86 800-8306390 800-8306395. E-mail: [email protected] . Report price: $7900 Print: $7800 CD: $7800. Special statement: Recently we find there are some sites steal report contents from Qianzhan who put those contents on their sites for sale by making a little changes about …

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(PDF) Detection of coal content in gangue via image …

2021-5-27 · Coal and gangue recognition is a key issue in rock picking during the coal preparation process. Four operating conditions including raw coal …

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The environmental pollution and control of coal gangue …

2015-1-1 · Coal gangue is the left solid waste in the process of coal mining, which is all kinds of rocks and residual abandoned coal and washing in machining coal, its composition is very complicated, and ...

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Gangue Wet Grinding Technology-HN Mining Machinery …

Effect of additives on grinding of magnetite ore - Mining . Aug 01, 1991 Investigations have been carried out to evolve a grinding aid useful in grinding a 40% iron-bearing magnetite containing quartz as the major gangue, based on studies conducted with pure magnetite, pure quartz and its synthetic mixture.These investigations established that an addition of 200 g of CaO per metric …

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Glass-ceramics fabricated by efficiently utilizing coal …

2021-8-4 · produced in coal production. Its amount produced in China is reached above several million tones and increases to about one million tones per year. Currently, the rate of using coal gangue is very limited. E fficiently utilizing the coal gangue is an urgent assignment to reduce air and river pollution and save natural resources.

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