MTW European Type Trapezium Mill
Input size:30-50mm
Capacity: 3-50t/h
LM Vertical Roller Mill
Input size:38-65mm
Capacity: 13-70t/h
Raymond Mill
Input size:20-30mm
Capacity: 0.8-9.5t/h
Sand powder vertical mill
Input size:30-55mm
Capacity: 30-900t/h
LUM series superfine vertical roller grinding mill
Input size:10-20mm
Capacity: 5-18t/h
MW Micro Powder Mill
Input size:≤20mm
Capacity: 0.5-12t/h
LM Vertical Slag Mill
Input size:38-65mm
Capacity: 7-100t/h
LM Vertical Coal Mill
Input size:≤50mm
Capacity: 5-100t/h
TGM Trapezium Mill
Input size:25-40mm
Capacity: 3-36t/h
MB5X Pendulum Roller Grinding Mill
Input size:25-55mm
Capacity: 4-100t/h
Straight-Through Centrifugal Mill
Input size:30-40mm
Capacity: 15-45t/h
Is there organic matter in coal gangue
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Opportunities, challenges and modification methods of coal
2024年9月7日 The activated organic matter in modified coal gangue serves as the foundation for soil aggregate formation, thereby influencing soil structure and porosity and subsequently 2019年12月1日 Coal gangue contains high organic matter, which is an ideal substrate for carrying nitrogen, phosphorus and potassium, so the scientific and rational addition of coal Comprehensive utilization and environmental risks of coal gangue: 2023年5月25日 Du et al studied the use of coal gangue as a novel planting substrate component and found that it significantly improved the chemical properties (organic matter, total N and P, and available N, P, and K) of the Lowcarbon utilization of coal gangue under the 2024年5月1日 Coal gangue contains a substantial amount of carbonaceous shale and siltstone and is rich in trace elements essential for plant growth The nitrogen, phosphorus, potassium, Enhancing the carbon content of coal gangue for composting
Pollution extents of organic substances from a coal gangue dump
2008年2月21日 The analysis results indicate that the coal gangues contain abundant harmful organic substances in coal gangue dump from Jiulong Coal Mine After 15 years, wind and 2018年1月24日 Trace elements in coal gangue could be associated with the organic matter and inorganic matter in coal gangue matrix, but prefer to be associated with inorganic matrix, such as clay, sulfides, and Trace Elements in Coal Gangue: A Review ResearchGate2022年10月28日 Although coal gangue is a coal mining and processing byproduct, there is still some organic matter in it Therefore, the calcination method can be used to enrich the critical elements from coal gangue by removing The Effect of Physical Separation and Calcination on 2024年3月13日 In this study, the coal gangue collected from Jungar coalfield contains 437 ppm of lithium, which is significantly higher than the av content of coal (318 ppm) in China Lithium extn from the coal gangue was Separation and Recovery of Valuable Carbon ACS
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Study on the Reactivity Activation of Coal Gangue for
2023年9月21日 In this study, the research aim is to enhance the activity index of activated coal gangue and study its activation mechanism The activation process of coal gangue was optimized through orthogonal tests, and the Back 2024年8月22日 The acid pollution produced from coal gangue piles is a global environmental problem Terminal technologies, such as neutralization, precipitation, adsorption, ion exchange, membrane technology, biological treatment, and electrochemistry, have been developed for acid mine drainage (AMD) treatment These technologies for treating pollutants with low Mechanism and In Situ Prevention of Oxidation in Coal Gangue2024年11月24日 Relevant research has shown that coal gangue is rich in organic matter, nitrogen, phosphorus, potassium, and other nutrients required by plants, which can declare that there is no conflict of interest regarding the publication of our research paper titled "Experimental study of the use of coal gangue as a planting substrate The use of coal gangue as a planting substrate in arid mining areasThe organic matter content in coal gangue of Weibei Coalfield is massive, ranges from 15% to 40%, and has great potential to supply the soil with organic matter There are 16 nutritious elements which are necessary for plant growth such as C, 0, H, N, K, P, S, Ca, Mg, Fe, B, Mn,Research on Potential Fertilization of Coal Gangue in the Weibei
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Pollution extents of organic substances from a coal gangue
2008年2月21日 The coal gangue is an inevitable byproduct in the mining process The coal gangue piles is the primary source of organic pollution in a mining area and has a large impact on the ecoenvironment of the mining area and its surroundings There are many coal gangue dumps in China and they contain many hazardous components2024年3月14日 In the coal gangue of Yangquan mine, Shanxi Province, chlorine was identified primarily in the form of organic matter, ferromanganese oxidation, and watersoluble compounds (Peng et al, 2018) Yang et al ( 2016 ) conducted an evaluation of the potential environmental and ecological hazards associated with coal gangue leachate wastewater in the Inner Environmental impact assessment of acidic coal gangue2024年2月15日 Coal gangue (CG) belongs to the bulk At present, there are many studies on the occurrence modes of Li in coal carbonatebound, FeMn oxidebound, organic matterbound, and residual The detailed extraction procedure is presented in Table S2 The supernatant of each fraction and the digested liquid of residual Study on modes of occurrence and selective leaching of lithium in coal 2017年9月1日 The filled coal gangue from the gob area of Qilanta Coal Mine, Shenhua Shendong Coal Group Corporation Limited was selected to do leaching experiments to explore the dynamic changes of DOM at room Dynamic changes of dissolved organic matter (DOM) from coal gangue
Effect of organic matter on the Rietveld quantitative analysis of
2016年5月20日 The presence of organic matter, however, has interference in varying degree to the quantitative result In this work, the mixed samples of organic matter and crystalline minerals at given proportions were prepared to investigate the effect of organic matter on the Rietveld quantitative analysis of crystalline minerals in coal gangue2019年11月7日 The contents of polycyclic aromatic hydrocarbons (PAHs) are relatively high with the distance getting closer to the coal gangue dump These indicate that organic matter in the samples is from coal The Release of Dissolved Organic Matter and Inorganic Nitrogen 2022年11月25日 China’s total coal production in 2021 exceeded 413 billion tons, 52% of the world’s total Coal gangue, a solid waste of coal mining accounts for 15–20% of coal production, when directly discharged on the ground surface as waste heaps, it occupies large areas of land and cause environmental pollution This paper summarizes the existing gangue backfilling Underground Disposal of Coal Gangue Backfill in China MDPI2024年8月10日 The modified coal gangue (MCG) was abundant in available silicon, potassium, organic matter and trace elements, making it a clean and effective siliconbased compound fertilizer This study focused on investigating the effects of reaction temperature, time, and KOH concentration on the nutrient activation and typical pollutants removal in CGSimultaneous nutrients activation and pollutants removal of coal gangue
Cocombustion and emission characteristics of coal gangue and
2015年2月18日 The reuse of coal gangue for energy recovery is developing rapidly in China, due to its advantage in achieving both economic and environmental benefits Lowquality coal is often added to elevate the calorific value of the fuel In this paper, the combustion characteristics as well as pollutant emissions (SO2 and NO) of coal gangue, lowquality coal and their blends 2023年11月1日 Insights into relationships between polycyclic aromatic hydrocarbon concentration, bacterial communities and organic matter composition in coal gangue site Author links open overlay panel Yuman Wu a b, Beidou Xi a, Fei Fang c, Bing Kou a b, Chen Gang b, Jun Tang a, Wenbing Tan a, Ying Yuan a, Tingqiao Yu d Show moreInsights into relationships between polycyclic aromatic The filled coal gangue from the gob area of Qilanta Coal Mine,Shenhua Shendong Coal Group Corporation Limited was selected to do leaching experiments to explore the dynamic changes of DOM at room temperature The re sults show that the pH value of effluent samples from the gangue column decrease from 8 74 to 7 64 The variations of electronic conductivity (EC) Dynamic changes of dissolved organic matter (DOM) from coal gangueAlthough coal gangue is a coal mining and processing byproduct, there is still some organic matter in it Therefore, the calcination method can be used to enrich the criticaland Recovery of Critical Elements from Coal Gangue ResearchGate
The relationships between heavy metals and bacterial
2023年4月1日 Coal plays an important role in the development of the national economy (Xiao et al, 2019; Zhang et al, 2018), and it continues to dominate the field of energy consumption (Chen et al, 2020a; Vick et al, 2019)Coal gangue is a solid waste byproduct that is generated during the process of coal mining, transportation, washing, and processing2022年10月30日 Pyrite is common in coal gangue formed in a reduced environment and has a significant influence on the recycling utilization of coal gangue Four types of pyrite with different structures and morphologies, namely octahedral pyrite framboid, pentagonal dodecahedral pyrite framboid, irregular grain pyrite, and euhedral octahedral crystalline pyrite, were selected from Thermal decomposition and oxidation of pyrite with different Keywords Coal gangue Coal mine underground reservoirs Dissolved organic matter Mine water Parallel factor analysis (PARAFAC) Introduction During the processes of coal mining, washing, and preparation, approximately 8 billion tons of mine water was generated every year from coal mine areas because of its extremely low utilizaCharacterization of dissolved organic matter derived from coal gangue 2021年7月7日 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 Seventyfive gangue samples of different geological ages are obtained from 25 coal mines in China The contents of Hg, Pb, Cd, Cr, As, Explanation of heavy metal pollution in coal mines of china from
Composition and Sources of Dissolved Organic Matter in the
2023年11月23日 Dissolved organic matter (DOM) regulates and controls the transformation and bioavailability of metals in coal mines Water samples were collected from the goafs of the Xinjulong coal mine The dissolved oxygen (DO) was less than 40 mg/L and the oxidation–reduction potential (ORP) ranged from 985 to 2546 mV; that is, the environment 2020年7月5日 Mine water can be purified through the removal of dissolved organic matter (DOM) and nitrogen through biological transformation and adsorption; however, minimal information is available about the effect of their release from the packed coal gangue on the purification of mine water in an underground reservoir packed with coal gangueEffect of Darcy flux on the release of dissolved organic matter 2024年5月1日 Coal gangue contains a substantial amount of carbonaceous shale and siltstone and is rich in trace elements essential for plant growth The nitrogen, phosphorus, potassium, and silicon contents in coal gangue are comparable to those found in soil Furthermore, the organic matter content in coal gangue is 2–10 times higher than that in soilEnhancing the carbon content of coal gangue for composting 2022年9月1日 The biodegradation of organic matter (OM) and the generation of SBG are part of the same process [8], [9], [10]According to Peters et al [11], biodegradation is generally evidenced by the reduction of heavy hydrocarbon components, the generation of biogenic CO 2, and the enrichment of SBG (dryness index C 1 /ΣC 1 −5 > 95%) Shelton et al [12] suggested Biodegradation of coal organic matter associated with the
Pollution of organic compounds and heavy metals in a coal gangue
These indicate that organic matter in the samples is from coal particles dump have polluted as thick as at least 500 m Key words coal gangue; environment; organic compound; heavy metal to 324 billion tons in 2010 (Chen Qi, 2011) Coal gangues, byproducts of the coal mine, are increasing rapidly, too There are 1500 coal mine dumps in 2021年1月6日 Characterization of dissolved organic matter derived from coal gangue packed in underground reservoirs of coal mines there is a lack of awareness related to the ability of underground water Characterization of dissolved organic matter derived from coal gangue 2020年1月15日 In particular, when adding 1000 g of coal gangue, the chemical properties (organic matter, total N, total P, total K, available N, available P) of the planting substrate improved significantly This finding might be because coal gangue contains more organic carbon and weathering nutrients than soil (Tripathi et al, 2016)Optimizing the formulation of coal gangue planting substrate 2020年2月20日 In addition, combusting organic matter in the coal gangue has to be taken into consideration since it could provide extra heat for calcination [45] Cao et al [12] investigated the influence of heating rate on the pozzolanic activity of calcined coal gangue and found that there was very little influenceReactivity activation of waste coal gangue and its impact on the
Understanding the release, migration, and risk of heavy metals in coal
2024年1月5日 Coal gangue (CG) is one of the representative solid wastes generated during the coal mining [1]The potential application of backfilling the mining area with CG is regarded as an effective batch disposal method to repair underground cavities and a circular economy approach to utilize the waste into resources [2]However, the enriched heavy metals in CG may 2019年12月1日 The amount of coal gangue, a byproduct of coal mining and washing, is rapidly increasing with the growing trend of energy consumption The accumulated coal gangue without appropriate utilization Comprehensive utilization and environmental risks of coal gangue2024年8月10日 The modified coal gangue (MCG) was abundant in available silicon, potassium, organic matter and trace elements, making it a clean and effective siliconbased compound fertilizer This study focused on investigating the effects of reaction temperature, time, and KOH concentration on the nutrient activation and typical pollutants removal in CGSimultaneous nutrients activation and pollutants removal of coal gangue 2020年7月5日 Effect of Darcy flux on the release of dissolved organic matter and nitrogen from coal gangue in a coal mine underground reservoir: Column experiments Author links open overlay panel Qing Zhang a b c Thus, there is a need to explore the dynamic changes of DOM and nitrogen released from the matrix packed in a coal mine Effect of Darcy flux on the release of dissolved organic matter
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Trace Elements in Coal Gangue: A Review
2018年1月24日 Coal gangue contains inorganic minerals and organic matter with high ash content, high pyrite content, and low heating value [1] Besides the conventional pollutants of sulfur and nitrogen,2021年7月28日 The reconstructed soil, which mainly comprises raw soil and is similar to the soil parent material used in the reclamation of coal gangue dump land, was characterized by a lack of organic matter Influence of coal gangue mulching with various thicknesses and 2019年5月1日 Gangue is the main solid waste in coal mine areas In China, there are more than 1700 coal waste piles, totaling approximately 45 billion tons, with a rate of increase of 350 million tons per year []The longterm accumulation of a large amount of gangue will have a serious impact on the ecological environment of the mining area [2,3]Quantitative Inversion of Fixed Carbon Content in Coal Gangue 2017年5月30日 There is no nitrogen or organic matter in fly ashnitrogen is volatilized and lost these researches mainly focused on the utilization of coal gangue, while there was a lack of attention to The Use of Coal Gangue as a Cultivation Bed Conditioner in
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Distribution pattern of polycyclic aromatic compounds in coal gangue
2023年3月30日 There are more than 1600 largescale coal gangue hills in China, It is worth noting that coal gangue is usually a complex of clay rock and carbonrich organic matter Therefore, the gangue is likely to dissolve heavy metal ions after natural weathering and is accompanied by the depolymerization and oxidation of carbonrich 2020年5月1日 Download Citation Effect of Darcy flux on the release of dissolved organic matter and nitrogen from coal gangue in a coal mine underground reservoir: Column experiments Underground reservoirs Effect of Darcy flux on the release of dissolved organic matter 2023年1月3日 Coal gangue (CG), one of the world’s largest industrial solid wastes produced during coal mining, is extremely difficult to be used owing to its combined contents of clay minerals and organic macromolecules This study explored a novel process of degrading the harmful organic compounds in the CG into humic acid using a biological method characterized Biodegradation of organic compounds in the coal gangue by2023年9月21日 In this study, the research aim is to enhance the activity index of activated coal gangue and study its activation mechanism The activation process of coal gangue was optimized through orthogonal tests, and the BackPropagation (BP) neural network model was improved using a genetic algorithm With the effects of grinding duration, calcination temperature, and Study on the Reactivity Activation of Coal Gangue for Efficient
Dynamic changes of nitrogen and dissolved organic matter
2019年4月1日 Column experiments at room temperature were carried out to study the removal efficiencies of dissolved organic matter (DOM) and ammonium in coal mine water by the filled coal gangue from the gob