Microstructure of Coal Gangue and Precipitation of …

 · 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 …

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The use of modified coal gangue for the remediation and removal …

 · Compared to the thermally activated coal gangue and polymerized ferric sulfate, the lanthanum-modified coal gangue exhibited a better capacity to fix phosphorus in sediment, and the phosphorus extracted by hydrochloric acid (HCL-P) and residual phosphorus (Res-P) levels in the sediment increased, where HCL-P accounted for 57.40% of the TP ...

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Influence of coal gangue mulching with various thicknesses and

 · The coal gangue having undergone no weathering was taken from the gangue dump. Meanwhile, near the gangue dump, a soil profile about 500 cm high formed due to the continuous excavation of the ...

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The Current Situation of Comprehensive Utilization …

Coal gangue is one of the largest industrial solid wastes in China; the comprehensive utilization of coal gangue has important social, economic and environmental benefits. In this paper, the coal gangue and comprehensive …

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Study on Calcination Catalysis and the Desilication Mechanism for Coal …

 · Coal gangue is a solid waste discharged during coal mining, which not only occupies large land resources but also brings about certain risks to the environment. The alumina and silica minerals in coal gangue are the major resources and difficult to separate from each other, which hinders the resource utilization of coal gangue. The catalytic effect of various …

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Explanation of heavy metal pollution in coal mines of china from …

 · In the process of coal gangue surface accumulation and underground filling disposal, the heavy metals contained in coal gangue will inevitably precipitate out and migrate, which will cause serious environmental pollution. Seventy-five gangue samples of different geological ages are obtained from 25 coal mines in China. The contents of Hg, Pb, Cd, Cr, As, …

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Utilization of coal gangue as coarse aggregates in ...

 · The coal gangue was crushed and sieved according to GB/T 14685-2011 for the preparation of ordinary concrete. The particle size of the sieved coal gangue coarse aggregates was in the range of 5 mm–35 mm. The basic physical properties of natural gravel and coal gangue were tested as listed in Table 1. It can be seen that compared with natural ...

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Experimental Study on Dynamic Mechanical Properties of Coal Gangue …

 · It can be seen from Table 2 that, in the chemical composition of coal gangue, the mass fractions of SiO 2 and Al 2 O 3 accounted for a large proportion: 50.86% and 12.37%, respectively. According to the classification relationship between the chemical composition of coal gangue and rock type, it was preliminarily determined that the coal gangue belonged to …

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Geological Analysis of Nianfa Coal Mine Project at Shatan, …

Download Citation | On Jan 1, 2015, Fuyan Pan published Geological Analysis of Nianfa Coal Mine Project at Shatan, Huairen city, Guizhou Province | …

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(IEECAS OpenIR): Mobility …

In this study, the mobility behavior of trace elements in coal gangue from the Huainan Coalfield was studied to evaluate the potential eco-toxicity of the trace elements. Sequential extraction was employed to analyze the fractionation behavior of trace elements in coal gangue. The selected trace elements (As, Co, Cr, Cu, Mn, Ni, Se, Sn, V and ...

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Release characteristics of heavy metals from coal gangue …

Coal gangue is an inevitable byproduct in the process of coal mining. With the development of the coal mining industry in recent years, the heavy-metal pollution from the coal gangue is paid more and more attention (Zhang et al., 2009; Sun, 2005; Sun et al., 2009). According to statistics, the coal gangues in China had already

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Recognition Methods for Coal and Coal Gangue Based on

 · 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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Reclaiming Subsidized Land: An Evaluation of Coal Gangue ...

 · 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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CN112536239A

A coal gangue separation system comprising: the device comprises a coal and gangue identification device, a coal and gangue separation device and a driving unit; the coal and gangue identification device is used for identifying clean coal and gangue; the coal gangue separation device comprises: the device comprises a first supporting seat, a guiding part, a …

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Coal Gangue Crushing and Screening

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 …

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Coal gangue cemented filling material and high-fluidity …

 · the invention discloses a coal gangue cemented filling material and high-fluidity high-solid content cemented filling material slurry, wherein the coal gangue cemented filling material is composed of coal gangue, cement, fly ash, auxiliary materials and a water reducing agent; 50-95 parts of coal gangue, 4-20 parts of cement, 1-50 parts of fly …

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coal-gangue

Introduction of 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.

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The environmental characteristics of usage of coal …

Coal gangue is one of the major solid wastes produced as a result of coal mining and its washing. Generally, the total discharge capacity of coal …

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(PDF) Trace Elements in Coal Gangue: A Review

 · with coal gangue, the mobility behavior of 10 trace elements (As, Co, Cr, Cu, Mn, Ni, Se, Sn, V, and Zn) in coal gangue from the Huainan Coalfield was studied by Zhou et al. [38]. The. sequential ...

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Trace Elements in Coal Gangue: A Review

 · 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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Effects of Fine Gangue on Strength, Resistivity, and Microscopic ...

 · The cemented coal gangue backfill (CGB) in coal mining is normally made of gangue (particle size of 0–15 mm), fly ash, cement, and water. In this study, the effects of the weight content (ranging from 20% to 60%) of fine gangue (0–5 mm) on the microscopic characteristics, resistivity, and compressive strength of CGB were investigated at 3 d …

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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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Power Generation from Coal Gangue in China: …

This paper provides an overview on the current status of power generation in China using coal gangue. The government regulation towards the use of coal gangue for power generation is introduced. Emission of pollutants and low …

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China Coal Gangue Industry Market Research and ...

 · With Forward''s the long-term tracking and collecting market data of coal gangue industry, we roundly and accurately analyze the structure system for you from the view of mastering the whole industry. This report mainly analyzes the following aspects: market environment of coal gangue industry; industrial chain of coal gangue industry; development …

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Coal Gangue and its Application Research in …

The current statistics show coal gangue discharge is 100 million tons per year, and the accumulated discharge has been as high as 4.5 billion tons. It comprises the largest portion of solid waste in our country. Its storage not only requires …

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[Spatial heterogeneity of soil water physical properties in coal gangue ...

Based on grid sample method (20 m×20 m), spatial heterogeneity and distribution of soil water physical properties from 0 to 5 cm of the coal gangue pile in arid desert area were explored by using classical statistics and geostatistics methods. The results showed that the variation of soil bulk density, capillary porosity, capillary maximum ...

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Coal gangue cement mortar

 · The invention discloses a coal gangue cement mortar, belonging to the field of constructional engineering material. The coal gangue cement mortar is characterized in that the coal gangue cement mortar is prepared by mixing semi-lightweight coal gangue fine aggregates (replacing building sands), cement and water, according to the weight percentage, after 62 …

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