guizhou coal gangue problem

Mineral Characteristics of Coal Gangue from Liupanshui in ...

2013-11-4 · Mineral Characteristics of Coal Gangue from Liupanshui in Guizhou Province JIN Hui-xin WU Fu-zhong ZHU MIng-yan School of Material and Metallurgy,Guizhou university Key Laboratory on Eco-Industry, Northeastern University College of Materials and Metallurgy, Guizhou University, College of Materials and Metallurgy, Guizhou University,

Soil quality assessment of coal gangue piles under …

2021-3-1 · The paper aimed at the problem of soil quality and heavy metal pollution of coal gangue piles in Yunnan-Guizhou mountainous area, the soil quality and heavy metal pollution of copper, zinc, iron, manganese and other heavy metals in coal gangue piles at different ecological restoration pattern were determined, and the soil quality and pollution risk degree were …

Geochemical characteristics of Guizhou Permian coal …

2011-3-13 · Based on element geochemical studies of the main Permian exploitable coal measure strata in Western Guizhou, the element geochemical distribution characteristics of the main exploitable coal measures were revealed in the regions of Dafang, Qianxi, Weining, Hezhang, Zhijin, etc., of Guizhou Province, and the results show that their element contents are mainly …

The southwest Guizhou the gangue developed the use of …

Such vast amount of coal gangue not only occupies the farmland but also causes severe pollution to the surrounding environment. Therefore, the effective reutilization of coal gangue became big problem to be solved. Qian-xinan is the third largest area …

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 ...

Coal Gangue Recognition Algorithm Based on Improved …

2021-12-19 · Coal gangue sorting is an important part of the construction of smart mines. At present, coal gangue identification and detection algorithms are mostly based on laboratory simulations for testing. Under actual working conditions, there are problems such as missed detection and poor real-time performance. In response to this problem, an improved YOLOv5 …

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.

Intelligent Detection of Foreign Matter in Coal Mine …

2022-7-5 · This paper applies the CenterNet target detection algorithm to the foreign object detection of coal conveying belts in coal mines. Given the fast running speed of coal conveying belts and the influence of background and light sources on the objects to be inspected, an improved algorithm of CenterNet is proposed. First, the depth separable volume is introduced. …

Soil quality assessment of coal gangue piles under …

The paper aimed at the problem of soil quality and heavy metal pollution of coal gangue piles in Yunnan-Guizhou mountainous area, the soil quality and heavy metal pollution of copper, zinc, iron, manganese and other heavy metals in coal gangue piles at different ecological restoration pattern were determined, and the soil quality and pollution risk degree were evaluated. Results …

Guizhou and coal

2022-6-28 · Gizhou has reported to have a total output of 118 million tons of coal in. The province measures 176,167 square km. It has a population of 34,746,468 as of 2010 census. The Quizhou province is one of the most important coal production bases in China. There are 8 coal mines located in Guizhou, two of them under production, 5 under construction ...

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 …

Coal gangue detection and recognition algorithm based …

2021-12-7 · Coal gangue detection and recognition algorithm based on deformable convolution YOLOv3 De-yong Li1,3,4 Guo-fa Wang3,4 Yong Zhang1,2 Shuang Wang1,2 1 State Key Laboratory of Mining Response and ... part of the intelligentisation of coal mines. Focusing on various problems in coal gangue

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 …

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 …

Environmental-friendly coal gangue-biochar composites …

2021-3-1 · Coal gangue, as a solid waste generated during coal mining and washing, not only encroaches on a large number of land resources but also poses certain risks to the environment. It is reported that the cumulative amount of coal gangue piled up in China has reached 6 billion tons, and the annual discharge amount is about 500–800 million tons.

Solved Coal gangue is a solid waste generated during coal …

Question: Coal gangue is a solid waste generated during coal mining and washing. As shown in Table 2, coal gangue has a decent SiO2 content, whereas it generally shows a very low pozzolanic reactivity. It was found that the use of coal gangue (Passing 200#) as a SCM reduced the compressive strength of OPC concrete at all ages.

Field study on the improvement of coal gangue filling …

2021-5-5 · In this study, dynamic compaction method was used to treat the gangue hill of the Xinglongzhuang coal mine in China, and the deep compaction of deep coal gangue was examined. The crushing characteristics and improving depth of coal gangue filling under different dynamic compaction conditions were determined. Dynamic compaction tests with different …

Excess sulfur and Fe elements drive changes in soil and …

2020-6-26 · Coal gangue piles accumulate outside mines and can persist for years, negatively impacting the regional environment. To determine the main cause of soil pollution at coal gangues, several coal ...

Mineral Characteristics of Coal Gangue from Liupanshui in …

The mineral characteristics of coal gangue from Liupanshui area in Guizhou Province were studied.The results showed that the mixed gangue samples of waste coal roadway gangue and rock gangue had low C content and low calorific value.which could not be used directly as power generation fuel.However,Al enrichment and high contents of Fe and Ca were one of the …

China : About Guizhou Xinghan Technology Trading Co., …

2022-7-1 · After the reconstruction and expansion, the project covers an area of ??25,000m2, and the main construction contents are: raw coal storage yard, conveyors, conveying corridors, grading screens, crushers and other coal preparation projects; Coal washing equipment such as separator, filter press concentration and other storage and transportation projects of raw coal, …

Mineral Characteristics of Coal Gangue from Liupanshui in ...

Abstract: The mineral characteristics of coal gangue from Liupanshui area in Guizhou Province were studied.The results showed that the mixed gangue samples of waste coal roadway gangue and rock gangue had low C content and low calorific value.which could not be used directly as power generation fuel.However,Al enrichment and high contents of Fe and Ca were one of the …

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 …

Potentially useful elements (Al, Fe, Ga, Ge, U) in coal …

2018-2-14 · Coal gangue has become one of the largest industrial solid waste in China, but it is also a kind of reserve resources. Representative coal gangue samples from different coal mines (mainly in Permo-Carboniferous and Jurassic) in Weibei area in Shaanxi Province are collected, and potentially useful elements (Al, Fe, Ga, Ge, U) in coal gangue are analyzed. The results …

(PDF) Soil quality assessment of coal gangue piles under …

2021-3-1 · PDF | On Mar 1, 2021, Lanchu Tao and others published Soil quality assessment of coal gangue piles under different ecological restoration pattern in Yunnan-Guizhou Mountainous area | Find, read ...

Release characteristics of heavy metals from coal gangue …

2021-7-8 · 3.1. Heavy metal in coal gangue sample The contents of heavy metals in coal gangue samples from the Jiulong Coal Mine are presented in Table 1. The contents of heavy metals in the coal gangue are Ba>Mn>Zn>Cu>Cr>Pb>Ni>Be>Cd. The Ba content is much higher than other heavy metals and up to 616 mg/kg. The contents of Mn, Zn, Cu, Cr, Pb, Ni are 460 ...

Frontiers | Factors Affecting Brittleness Behavior of Coal …

Coal gangue, which is the solid waste produced during the coal processing, causes serious environmental problems. Lightweight concrete by making use of the coal-gangue ceramsite as the aggregate has many advantages as the construction material. However, the high brittleness of lightweight aggregate concrete is one of the problems for its application in building …

Analysis of Characteristics of Coal Resources in …

2013-12-24 · content in these coal samples is mostly less than 1%, which therefore belong to low sulfur coal. Hydrogen content in coal sample BH is the highest which is 5.33%, while coal sample JP has the lowest as 4.54%. Hydrogen content in these coal samples are mostly 4.6% ~ 5.0%. The ratios of hydrogen to fixed carbon in the coal

Excess sulfur and Fe elements drive changes in soil and …

2020-6-26 · Coal gangue piles accumulate outside mines and can persist for years, negatively impacting the regional environment. To determine the main cause of soil pollution at coal gangues, several coal gangues in Guizhou Province, China that had undergone natural recovery via native plants for 8 years were investigated in summer 2019.

Guizhou Xingyi Gangue''s Activation Research and the …

Through the gangue activation temperature and activation mechanism of the best research for the next resource utilization of coal gangue provide a strong experimental evidence and theoretical support. 3 gangue as the basic raw material in preparation of inorganic polymer flocculant (IPF), neither generate new environmental pollution, but also ...