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
How to control the quartz content of coal gangue
Separation and Recovery of Valuable Carbon ACS Publications
2024年3月13日 The modes of occurrence of Ga and Li in coal gangue were studied using a sequential chem extn procedure (SCEP), mineral phase compn, timeofflight secondary ion mass spectrometry (TOFSIMS), and elemental content compn The results indicate that the Alfarzaeai et al established a new coal gangue recognition model (CGRCNN) Research on the Identificatio2024年9月7日 Coal gangue possesses developed pores and specific surface area, thereby aiding soil aeration and preventing compaction (Zhang et al 2022a) The organic carbon Opportunities, challenges and modification methods of coal 2024年2月2日 Common activation methods include thermal activation, mechanical activation, microwave activation, and composite activation Thermal activation is considered the most Study on the calorific value and cementitious properties of coal
Lowcarbon utilization of coal gangue under the
2023年5月25日 The carbon content of coal gangue should be considered in the energy utilization mode; the combustion of lowcarbon coal gangue causes low calorific value and thermal efficiency Relevant research shows that coal 2019年12月1日 The mineral composition of coal gangue mainly includes quartz, clay minerals and carbonaceous materials, among which clay minerals account for 50%–70%, quartz Comprehensive utilization and environmental risks of coal gangue: 2022年12月20日 Alfarzaeai et al established a new coal gangue recognition model (CGRCNN) based on a convolutional neural network (CNN), which used thermal imaging of coal gangue as the separation feature The model provides Research on the Identification Mechanism of Coal 2024年2月1日 The content of HM Cu in solid waste can be analyzed using flame atomic absorption spectrophotometry, as per the Chinese standard HJ 7512015 The content of HM Representative coal gangue in China: Physical and chemical
Comprehensive utilization and environmental risks of coal gangue:
2019年12月1日 Aiming at the problems of the large storage, complex composition, low comprehensive utilization rate, and high environmental impact of coal gangue, this paper 2023年9月7日 Kaolinite and quartz are the common gangue minerals found in raw coal; however, their effects on stability of coal froths and subsequent settling of coal flotation products have not been investigatedThe Influence of Kaolinite and Quartz on Stability of 2015年9月26日 Mass use of coal gangue and waste quartz sand in preparation of glass–ceramic foams may be an effective method to solve the problems abovePreparation and characterization of glass–ceramic foams with 2020年2月20日 A large amount of coal gangue buildup may be a potential fire hazard associated with the heat released by microorganisms accumulating to the point of spontaneous combustion in the presence of unburned coal, pyrite (FeS 2) and oxygenCoal gangue is likely to cause largescale fire and blast disasters, and produce a significant amount of toxic emissions Reactivity activation of waste coal gangue and its impact on the
Opportunities, challenges and modification methods of coal gangue
2024年9月7日 The persistent reliance on coal has resulted in the accumulation of substantial coal gangue, a globally recognized problematic solid waste with environmental risks Given the coal gangue properties and global land degradation severity, the resourceful utilization of coal gangue as soil conditioners is believed to be a universally applicable, costeffective, high 2024年2月2日 Suitable waterreducing agents were used to control the fluidity of the cement paste between 180–220 mm The main mineral components of the coal gangue shown in Fig 3 are quartz, kaolinite, while the cement paste with noncalcined coal gangue is hindered in strength development due to the high carbon content in coal gangueStudy on the calorific value and cementitious properties of coal gangue 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4月1日 Coal gangue power generation is presently the primary method of comprehensively utilizing coal gangue to achieve economic profits [157] Coal gangue is composed of carbon and other flammable substances, which can produce heat when burned This heat can be utilized for the purposes of power generation and heating [158]Environmental hazards and comprehensive utilization of solid waste coal
Synergistic performance of microwaveactivated coal gangue with
2024年11月1日 Coal gangue: The coal gangue (CG) used in this study is untreated raw coal gangue, sourced from Lingshou County, Hebei Province, China Its appearance mostly presents as flakes or blocks of blackgray rocks, and the shape and size of CG vary2019年6月1日 Coal gangue was obtained from Dalianhe city, Heilongjiang province of China It looks brickred particles due to selfignition effect and was pulverized into a powder as shown in Fig 1The mineralogical phase of coal gangue consists of quartz and feldspar as indicated in Fig 2Portland cement (PC) was produced by Dalian Cement Group with strength grade of 425 in Properties of coal ganguePortland cement mixture with 2024年3月13日 Coal gangue (CG), an industrial solid waste with high contents of Li and Ga, has attracted the attention of researchers However, the utilization of CG remains an economic challenge Preenrichment of Li and Ga by flotation was carried out with a view to improving the comprehensive utilization of CG Mineral composition, timeofflight secondary ion mass Separation and Recovery of Valuable Carbon ACS Publications2019年9月30日 Coal gangue is also called a ‘resource in the wrong place’ Although there are many varieties of coal gangue, which are relatively nonhomogeneous and have varying properties, the chemical and mineral compositions of a large portion of the accumulated gangue are similar to those of natural aggregateEffects of the variety and content of coal gangue coarse
Trace Elements in Coal Gangue: A Review IntechOpen
2017年12月20日 Coal gangue is one of the largest industrial residues It has high ash content, low carbonaceous content, and heating value Meanwhile, it has some trace elements Large quantities of coal gangue cause serious environmental problems by polluting the air, water, and soil as well as occupying a tremendous amount of land Now, coal gangue utilization is a 2024年6月4日 The coal industry is an important pillar industry of economic development in China, with coal mining produced a lot of coal gangue, which is occupied land, and pollution of the environment, and the production and life of coalproducing areas have been seriously affected, coal gangue has become a heavy burden restricting the sustainable development of coal Characteristics of Coal Gangue and Present Situation and Raw coal gangue Content (%) Calcined coal gangue Content (%) Kaolinite 7855 Metakaolinite 9209 will focus on how to improve the pozzolanic activity of quartz in coal gangue 33Effect of calcination condition on the microstructure and 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
Toward understanding the activation and hydration
2022年2月7日 Coal gangue can be viewed as potential resources instead of wastes after appropriate treatment Li proposed that the coal gangue can be used as coal mine goaf backfill [8] and underground filling material [9], [10]Abichou pointed out that crushed coal gangue can be partly or entirely used as fine aggregate in concrete [11]Czech researchers activated coal 2021年11月11日 Among the techniques for converting stacked coal gangue to reusable material, one of the most effective ways is to use coal gangue as a coarse aggregate in green concrete productions(PDF) Application of Coal Gangue as a Coarse Aggregate in Green 2016年7月25日 The thermal behavior of coal gangue selected from Zhungeer, Inner Mongolia Autonomous Region of China, was investigated by Xray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, thermogravimetry (TG), derivative thermogravimetry (DTG), and scanning electron microscope (SEM) The XRD data indicated that the mineral compositions The thermal activation process of coal gangue selected fromTherefore, we must control the content of coal gangue impurities to improve the performance of porous cordierite ceramics prepared using coal gangue In this study, porous cordierite ceramics were fabricated via the polyurethane sponge infiltration method [ 26 ] using coal gangue, basic magnesium carbonate, and bauxite as raw materialsPreparation of porous cordierite ceramic with acidleached coal gangue
Application of Coal Gangue as a Coarse Aggregate in Green
2021年11月11日 2 Utilization of Coal Gangue For years, researchers have been working on the effective utilization of the enormous stocked coal gangue In China, more than a half of discharged coal gangue is used for land reclamation—one third of that is used for power generation and the rest is used for producing building materials [2,4]However, the main 2018年1月24日 In comparison to coal, coal gangue has a higher content of trace element and mineral [15] Therefore, it can be inferred that the emission behavior of trace elements in coal gangue may be(PDF) Trace Elements in Coal Gangue: A Review ResearchGate2020年1月15日 The formulation of the substrate was optimized using an orthogonal experiment with four factors: coal gangue (g)tosoil (g) ratio (1000:0, 750:250, 500:500), maize straw content (0, 25, and 50 g Optimizing the formulation of coal gangue planting substrate 2021年3月11日 Coal gangue is an industrial solid waste inevitably produced in coal mining and coal washing, and its emissions account for approximately 10%–15% of coal production (Zhou et al 2014a, b)China is the country with the highest coal production in the world, and a large amount of coal gangue waste is piled on the surface at mining sites to form coal gangue hill, Characteristics of leaching of heavy metals from lowsulfur coal gangue
(PDF) Diffusion law of coal gangue slurry and the
2023年8月14日 To solve the problem of gangue discharge in coal mining, fluidized gangue filling technology was developed The key scientific problem of this technology is the diffusion characteristics of the 2024年2月1日 Coal is not only the most abundant fossil fuel on earth, but also an indispensable energy source in the industrial age According to the data of “2021 National Mineral Resources Reserve Statistics Table”, the cities with the most coal reserves in China's energy minerals are Inner Mongolia, Xinjiang, Shanxi, Hebei, Chongqing, Gansu, Shaanxi and other regionsRepresentative coal gangue in China: Physical and chemical 2024年3月16日 This study explores the potential of municipal solid waste incineration bottom ash (MSWI BA) and coal gangue as precursors for alkaliactivated cementitious materials (CGMBA) An examination of the impact of MSWI BA content, NaOH/Na2SiO3 ratio, liquid–solid ratio, and NaOH concentration on strength and reaction through the application of diverse analytical Experimental study on municipal solid waste incineration bottom 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 thatChen et al IOPscience
Environmental impact assessment of acidic coal gangue
2024年3月14日 With the continual advancement of coal resource development, the comprehensive utilization of coal gangue as a byproduct encounters certain constraints A substantial amount of untreated coal gangue is openly stored, particularly acidic gangue exposed to rainfall The leaching effect of acidic solutions, containing heavy metal ions and other 2016年11月1日 Coal gangue, a type of kaolinite clay in coal measures, is one of the largest categories of solid industrial wastes in China Alumina extraction from coal gangue could offer an alternative to Improved extraction of alumina from coal gangue byChina, extensive coal gangue accumulation has been reported in more than 1200 counties Currently, the amount of accumulated coal gangue is approximately 45 billion tons, and there are more than 1600 coal gangue mounds that occupy approximately 15,000 ha of land; moreover, the quantity of gangue accumulationEffects of the variety and content of coal gangue coarse 2024年2月23日 Coal gangue is the main tailings of coal mine, accounting for about 10% ∼ 20% of coal production At present, China is the largest coal production country reaching 5 billion tons, rising at an annual rate of 150 million ∼ 200 million tons [1], [2]In recent years, the average annual consumption of concrete in China has exceeded 436 million tons, and the average Utilization of coal gangue sand in structural concrete as fine
Coal Gangue: Composition, Processing, Use And Recycling
2024年1月18日 Coal: One of the main components of coal gangue is coal itself, including different types of coal, such as stone coal, lignite, anthracite, etc Rock: Coal gangue usually contains a large amount of rockThese rocks may be rock layers above and below the coal seam or other stones in the deposit Pyrite: As you mentioned, coal gangue may contain pyrite, a 2021年1月15日 Abstract Thermally activated coal gangue and lanthanummodified coal gangue were prepared by thermal activation and hydrothermal methods, respectively Their structures and properties were characterized by Xray diffraction (XRD), attenuated total reflection flourier transformed infrared spectroscopy (ATRFTIR) and transmission electron microscopy (TEM) The use of modified coal gangue for the remediation and removal 2016年6月8日 Coal gangue is mainly used to make sintered brick instead of clay [2], but the application has been limited after 2017 due to high energy consumption in production and high sulfur content in the Utilization of coal gangue for the production of brick2016年6月8日 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 then pressed into green compacts The dried compacts were sintered at different temperatures for 2 h The obtained brick samples were characterized with Xray Utilization of coal gangue for the production of brick
Toward understanding the activation and hydration
2022年2月7日 In this paper, a composite activation strategy was employed to enhance the reactivity of coal gangue as a primary cementitious material Furthermore, an Orthogonal test was designed and carried out to quantify the effects of modulus of sodium silicate (M), alkali content (A), calcination temperature (T), holding time (H), watertobinder ratio (W/B) on the hydration Moreover, coal gangue was a byproduct of the coal mining and washing processes, accounting for approximately 10 %–25 % of the total raw coal production [[9], [10], [11]]Its carbon content was relatively low and its hardness was higher than that of coal [12]According to the data of China Resources Comprehensive Utilization, the production amount of coal gangue in 2021 Synergistic action and effect mechanism of coal gangue powder 2024年6月17日 In order to effectively mitigate the oxidation reactions of coal (RC) and gangue (RG) at low temperatures, a comprehensive study was conducted on the mineral composition, structural characteristics, and oxidation behaviors of RC and RG from the same coal seam Additionally, the thermodynamic attributes of their oxidation processes were evaluated The Structural characteristics and lowtemperature oxidation 2015年6月1日 Coal gangue (CG) and raw coal (RC) can catch fire due to spontaneous combustion The combustion characteristics, functional groups, and kinetic behaviour of CG and RC were investigated to assess Cocombustion and emission characteristics of coal gangue and
Using Chinese Coal Gangue as an Ecological Aggregate and Its
2022年6月26日 Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications Producing concrete with coal gangue aggregate is one of the green sustainable development requirements This paper reviews the properties and preparation methods of Chinese gangue aggregate, studies the influence of gangue aggregate on 2020年5月15日 The potential activity of coal gangue can be effectively stimulated through mechanical and thermal activation, and the content of potential active minerals in coal gangue powders was also increasedExperimental Study on the Characteristics of Activated Coal Gangue 2022年9月15日 Pyrite, with the chemical formula FeS 2, is a ubiquitous mineral in coal and is a harmful colourstained impurity in kaoliniterich coal gangue, which is widely used as a raw material to produce calcined kaolin in many factoriesTransformation of pyrite to various phases under calcination may influence and even decide ways of comprehensively utilizing of coal The thermal transformation behavior and products of pyrite during coal