coal gangue refining project

coal-gangue

Gangue, also called coal gangue, is the solid waste discharged in coal mining process and coal washing process, black rock harder than coal. Its carbon content is low and exists along with coal seam. Gangue could be found in roof, bottom board, inter-layer, and it could be selected in washing process. The main ingredient are Al2O3, SiO2, Fe2O3 ...

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Characterization studies on coal gangue for sustainable …

2020-2-5 · The SSA of coal gangue was observed to be 80 m 2 /kg and 140 m 2 /kg for 4.75 mm passing and 0.425 mm passing fractions, respectively. The SSA values observed for coal gangue can be considered as marginal compared to clayey soils. However, the SSA is higher than general SSA values of sands.

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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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Chen et al.

Coal gangue is the fixed product during the process of coal mining, washing and processing. And its chemical composition is SiO 2, Al 2O 3, Fe 2O 3, MgO, CaO, TiO 2, etc . Since the middle of the 20th century, coal gangue emissions have been increasing, and now it has become one of the industrial waste that

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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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(PDF) Power Generation from Coal Gangue in China: …

2012-7-2 · Coal gangue with calorific value of 6270 kJ kg À1 -12550 kJ kg À1 can be directly used as boiler fuel without sorting, and coal gangue with calorific value of 4180 kJ kg À1 …

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Study on Preparation of Coal Gangue-Based Geopolymer …

2021-6-24 · 2. Alkaline Dry Powder-Activated Coal Gangue-Based Geopolymer Concrete 2.1. Preparation Techniques (1) Coal gangue and fly ash required for preparation: the coal gangue in the experiment is the spontaneous combustion coal gangue of Gaode Mine in the Fuxin City, Liaoning Province, and its chemical composition is shown in Table 1.The fly ash of grade I in …

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Coal Gangue Comprehensive Utilization Project of Baishan …

2020-7-2 · 1. Introduction to the Project. 1.1 Project background 1.1.1 Product introduction. Coal gangue is a kind of solid waste discharged in the process of coal mining and coal washing. It is a kind of black gray rock with low carbon content and harder than coal, which is associated with coal seam in the process of coal formation.

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Reclaiming Subsidized Land: An Evaluation of Coal Gangue …

2020-1-20 · Rehabilitation of areas impacted by subsidence following coal mining is a pressing need in eastern China, especially where availability of suitable soil material is limited. A field experiment was established to evaluate performance of varying layered combinations of soil and coal gangue materials as measured by maize (Zea mays L.) growth and yield. Two …

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Coal Gangue Crushing and Screening

2022-6-1 · 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 ...

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Experimental Study on the Characteristics of Activated …

2020-5-15 · Coal gangue-based geopolymer (CGGP) is one of the hot spots existing in the recycling of coal gangue resources due to its good comprehensive mechanical properties. However, the coal gangue structure is stable and reactivity is poor, so the coal gangue needs to be activated before utilization. In this paper, the microstructure changes of activated coal …

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Reaction mechanism of metakaolin materials prepared by …

2021-1-20 · Coal resources play a vital role in the current energy supply worldwide, especially in China [].As a solid waste generated during coal mining and coal washing, coal gangue production is enormous, accounting for about 10%–15% of coal production [] China alone, the output of raw coal was 3.97 billion tons, and the emission of coal gangue was 380 million tons in 2019 [].

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Recognition Methods for Coal and Coal Gangue Based on …

2021-5-17 · Recognizing coal and coal gangue is an important part of the coal industry and is mainly conducted via human sorting at present. Consequently, considerable manpower is needed, which adds a burden to enterprises and results in low efficiency. As an important branch of artificial intelligence, deep learning has been widely applied in many fields, especially in …

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Influence of coal gangue mulching with various …

2021-7-28 · Coal gangue, as a type of solid waste discharged during coal mining and coal washing, occupies a large amount of land resources owing to accumulated gangue, which eventually results in ecological ...

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Field study on the improvement of coal gangue filling …

2021-5-5 · The coal gangue filling bearing capacity reached at least 350 kPa after being improved by dynamic compaction with a tamping energy greater than 3000kN.m. ... it becomes dense, and the corresponding bearing capacity improves. The demonstration project should be treated using a tamping energy greater than 3000 kN.m to ensure an adequate filling ...

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Clean Development Mechanism Evaluation Study

2013-8-28 · Clean Development Mechanism Potential Evaluation Study – Chinese Coal-Gangue Brick-making Sector 7 1 Introduction This report has been prepared by Camco, on behalf of the United Nations Industrial Development Organisation (UNIDO). This assignment contributes to Output 1 ''Coal-gangue Brick Sub-sector CDM Potential and

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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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2019-8-21 · Coal Gangue . Physical parameter Rock type: coal gangue Main component: Al2O3,SiO2 Rock density: 2100-2900kg/m3 Mohs hardness: 3 Compressive strength:300-4700Pa

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(PDF) Application of Coal Gangue as a Coarse Aggregate …

2021-11-11 · 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 rec ...

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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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Integrated green mining technology of "coal mining …

2021-8-24 · In Tangshan Mine, there are four engineering problems, including the layout of multiple seam mining system, serious environmental damages caused by gangue accumulation and surface collapse, nearly 100 million tons of three under coal (coal trapped under buildings, water bodies, and railways) to be released, and the control accuracy of stratum formations to …

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Is the Coal Gangue Really Useless

2019-5-31 · At present, there are some power projects which use the coal gangue to generate power, which has produced good economic benefit and environmental benefit. The comprehensive utilization of coal gangue is a complex project involving multi-disciplinary field and a variety of technical fields, which must be analyzed with the chemical composition of ...

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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 and Gangue Recognition Method Based on Local …

Coal gangue is a kind of industrial waste in the coal mine preparation process. Compared to conventional manual or machine-based separation technology, vision-based methods and robotic grasping are superior in cost and maintenance. However, the existing methods may have a poor recognition accuracy problem in diverse environments since coals and gangues’ …

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Utilization of Coal Gangue Aggregate for Railway …

Sustainability 2020, 12, 4583 4 of 20 construction, the inside vertical earth pressure was measured, and its distribution law was investigated by …

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Utilization of coal gangue as coarse aggregates in

2021-1-25 · In most of the studies on coal gangue concrete from the aspect of material, 50% coarse aggregate replacement ratio was commonly used as the maximum replacement ratio whilst coarse aggregate replacement ratio was also investigated by some researchers .Since the aim of this study is to maximize the application efficiency of coal gangue in …

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Identification Method of Coal and Coal Gangue Based on …

To solve the problems of the difficult feature extraction, poor feature credibility and low recognition accuracy of coal and gangue, this paper utilizes the difference in the dielectric properties of coal and gangue and in combination with a support vector machine (SVM) to propose a recognition method based on the dielectric characteristics of coal and gangue. The influence rule of the …

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Coal/Gangue Recognition Using Convolutional Neural …

2020-4-24 · This paper addressed the topic of Coal/Gangue recognition and built a new model called (CGR-CNN) based on Convolutional Neural network (CNN) and using thermal images as standard images for Coal ...

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Utilization of coal gangue for the production of brick

2016-6-8 · Abstract. Coal gangue, an industrial solid waste discarded from coal mining and processing, was used as the sole raw material to prepare brick. The coal gangue was crushed, homogenized, milled and ...

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