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
Tunnel coal gangue
Internal Curing for Tunnel SelfCompacting Concrete Using Pre
2024年9月28日 A simple presoaking coal gangue (PCG) technique was proposed for internally curing selfcompacting concrete The incorporation of presoaked coal gangue enhanced the 2021年12月1日 To accelerate the insitu utilization of coal gangue, this paper explored coal gangue aggregates (CGA) as the single aggregate source to prepare shotcrete used for coal Environmentally friendly utilization of coal gangue as aggregates 2024年2月1日 Based on the source and distribution of coal gangue (CG) in China, this study introduces the current situation of CG storage in China and the problems existing in the Representative coal gangue in China: Physical and chemical To accelerate the insitu utilization of coal gangue, this paper explored coal gangue aggregates (CGA) as the single aggregate source to prepare shotcrete used for coal mine tunnelLiheng ZHANG PhD Tongji University, Shanghai
Internal Curing for Tunnel SelfCompacting Concrete Using Pre
2024年9月28日 Semantic Scholar extracted view of "Internal Curing for Tunnel SelfCompacting Concrete Using PreSoaked Coal Gangue: A Promising Way for Spot Utilization of Coal 2021年10月1日 Coal gangue is a waste product commonly produced during coal mining Using gangue as a replacement for conventional aggregates in shotcrete applied to underground Environmentally friendly utilization of coal gangue as aggregates 2022年9月30日 Using coal gangue (CG) as a building material does not only reduce the disposal of industrial waste and promote the resource utilization of solid waste, but also solves the Preparation of coal gangue ceramsite highstrength concrete and 2024年9月7日 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 Opportunities, challenges and modification methods of coal
Research and prospect of underground intelligent coal gangue
2024年9月1日 Coal gangue sorting robots can efficiently separate gangue directly from the coal stream Applying intelligent sorting robots for automated coal gangue separation is becoming a 2023年11月23日 Based on the greening and low interference disposal requirements of coal gangue in highyield and highefficiency mines in Inner Mongolia and Shaanxi, and by integrating the existing theories and Technology and engineering test of filling goaf with coal gangue 2024年9月1日 As a byproduct of coal production, coal gangue, if not handled properly, will pose an important hidden danger to the environment and safety Using underground intelligent coal gangue sorting technology can increase efficiency, protect the environment, and enhance safety, which is essential for achieving efficient and ecofriendly coal productionResearch and prospect of underground intelligent coal gangue 2024年9月7日 Coal gangue is a complex industrial solid waste mixed with organic compounds, inorganic compounds and minerals (Fabiańska et al 2013)Its major chemical compositions are SiO 2, Al 2 O 3 and Fe 2 O 3, with traces of CaO, P 2 O 5, MgO and MnO 2The chemical composition of coal gangue from various sources and its comparison with soil reference Opportunities, challenges and modification methods of coal gangue
Characteristics of Coal Gangue and Present Situation and
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 2024年8月23日 Coal gangue, a byproduct of coal mining, constitutes over 10 % of coal production [4] and represents one of the largest accumulations of industrial solid waste worldwide, posing significant ecological concerns [5], [6], [7]Consequently, repurposing coal gangue as a resource has emerged as a critical area of research [8]At present, coal gangue serves Enhancing coal gangue aggregates with fly ashcement slurry 2024年2月1日 CG1 is Hebei coal gangue, which comes from a coal gangue processing plant in Xingtai, Hebei Province Environmentally friendly utilization of CG as aggregates for shotcrete used in the construction of coal mine tunnel Case Stud Constr Mater, 15 (2021), Article e00751, 101016/jcscm2021e00751 ISSN 22145095Representative coal gangue in China: Physical and chemical Coal gangue, a byproduct produced during the coal processing, has a serious impact on the environment Using coal gangue as a fertilizer has been proven helpful in potentially reducing its environmental impact and improving its value In this study, the formation mechanism and influencing factors of coalganguebased silicon fertilizer was studied using XRD and FTIR Sustainable and clean utilization of coal gangue: activation and
Research on shotcrete in mine using nonactivated waste coal gangue
2020年6月20日 The satisfactory mechanical properties of coal gangue make coal gangue concrete feasible, especially for underground tunnel shotcrete support and grouting Many other waste materials have been widely utilized in concrete production, including waster glass powder ( Tang et al, 2019 ), crushed recycled concrete ( Barbudo et al, 2013 ), iron tailing ( Lv et al, The increasing dependence on coal resources in Asian coun tries has generated a large amount of coal gangue during the process of coal mining and production ( Feng et al 2019) Coal gangue (CG) is an industrial solid waste that accounts for about 10–25% of the total coal production (Huang et al 2018) It has been reported that nearly 7 Internal Curing for Tunnel SelfCompacting Concrete Using Pre 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 MDPI2022年9月30日 Coal gangue (CG) is a type of industrial solid waste produced by the process of coal excavation and separation 1,2,3 Generally, one ton of CG is discarded for every 10 tons of produced coal 4 , 5 Preparation of coal gangue ceramsite highstrength concrete and
The Sustainable Utilization of Coal Gangue in Geotechnical and
2022年4月6日 “Effect of coal gangue particle size on its leaching characteristics” In GeoCongress 2020: GeoSystems, Sustainability, Geoenvironmental Engineering, and Unsaturated Soil Mechanics, Geotechnical Special Publication 319, edited by J P Hambleton, R Makhnenko, and A S Budge, 107–1142021年1月25日 In China, coal gangue accounting for 1/10, even 1/5 of coal production, is one of the major industrial and mineral residues The stock of coal gangue in China has reached a billion level, with an increasing rate of 150–200 million per year [7], [8]How to utilize the stacked coal gangue is a serious topic in mining industry and construction industryUtilization of coal gangue as coarse aggregates in structural 2023年10月11日 The coal fly ash concentration has a positive relationship with the acceleration factor The permeability of crushed coal gangue follows a hierarchical distribution law and the permeability changes in the magnitude range of 10–11 ~ 10–9 m2 The fractal dimension is inversely related to the permeability of crushed coal gangueStudy on mechanical properties of coal gangue and fly ash2024年5月10日 This reduces the amount of original ore mining activity and improves coal gangue waste usage and environmental protection The chemical and mineral compositions of coal gangue and NA are similar As a result, there has been increased research on coal gangue as an aggregate in concrete production [9], [10]Performance of coal gangue concrete with fly ash and ground
Preventing water inrush hazards in coal mines by coal gangue
2023年9月13日 This technology retransfers the gangue from the surface to the underground and fills it into gobs in a dense manner, which fills the gobs generated by coal mining in time, eliminates the possibility of large deformation of the upper rock strata at the time when they have not collapsed, weakens the mine pressure, and reduces the cost of tunnel support (Li et al Coal gangue is one of the largest mine solid wastes in China, and its discharge and stockpiling have caused resource waste, environmental pollution and other problems Starting from the resource characteristics of coal gangue, this paper systematically discusses the ways and research status of coal gangue resource utilization, mainly including: extracting and recovering Research Progress on Comprehensive Utilization of Coal GangueCoal gangue (CG) can be a potential aggregate for concrete production considering its huge production However, its porous structure and high water absorption significantly impact the workability of concrete, restricting its comprehensive utilization This paper proposed a straightforward presoaking technique for CG, where the presoaked CG (PCG) is partially Internal Curing for Tunnel SelfCompacting Concrete Using Pre 2018年4月3日 ABSTRACT Utilizing the difference in hardness, coal and gangue can be separated by the impactcrush technology for utilization underground The influence of hardness and impact velocity on the crushratio difference of coal and gangue was studied using an impactcrush separator and was optimized using the orthogonal experiment method The equation of ImpactCrush Separation Characteristics of Coal and Gangue
Application of Coal Gangue as a Coarse Aggregate in Green
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 The physical and chemical properties of rock and spontaneouscombustion coal gangue are generally suitable for being used as a coarse aggregate in green concrete 2024年4月15日 Coal gangue is a byproduct of coal mining and processing, and according to incomplete statistics, China has amassed a substantial coal gangue stockpile exceeding 2600 large mountains, which poses a serious threat to the Enhancing Fatigue Performance of Coal Gangue 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 Application of Coal Gangue as a Coarse Aggregate in Green 2024年7月22日 A case study of displacement, stress condition and failure criterion of surrounding rock in deep superlarge section double chambers in the Longgu Coal Mine, Shandong, ChinaA case study of displacement, stress condition and
Optimization of inclined coal seam tunnel section angle and
It is tunneled along the 3# coal seam It is a full coal tunnel construction The coal seam thickness is 59~645m, with an average thickness of 641m The lower part there is about 02~05m gangue inclusion, and the coal seam inclination angle is 10°~25° The tunnel section is rectangular, with tunnel width × height = 524m × 45m According2024年3月27日 Underground backfilling stands out as a crucial technological strategy for the ecofriendly and effective management of solid waste in mining operations However, existing backfilling techniques have led to increased production processes at the working face, resulting in a reduction in coal extraction efficiency Addressing the temporal and spatial interference Gangue grouting filling in subsequent space of coal green mining 2024年4月1日 Semantic Scholar extracted view of "Safe and environmentally friendly use of coal gangue in C30 concrete" by Chaoqiang Wang et al Skip to search form Skip to main content Skip to account menu Semantic Internal Curing for Tunnel SelfCompacting Concrete Using PreSoaked Coal Gangue: A Promising Way for Spot Utilization of Coal Safe and environmentally friendly use of coal gangue in C30 2024年1月18日 Coal gangue is a fixed coal mining, washing, and processing product It is a blackgray rock with lower carbon content and harder than coal associated with coal seams during the coal formation process And its chemical composition is SiO2, Al2O3, Fe2O3, MgO, CaO, TiO2, etc What Minerals Do Coal Gangue Mainly Contain? Coal gangue refers []Coal Gangue: Composition, Processing, Use And Recycling
Numerical simulation of waste heat utilization in tunnel kiln of coal
The mathematical model of gangue brick tunnel kiln was established to simulate the heat transfer between brick, air and boiler to study the waste heat recovery The temperature distribution in the coal cangue tunnel kiln was studied Simulation results show that the place of the waste heat boiler has certain impact on gangue brick quality and waste heat utilization It not only can 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 Environmental impact assessment of acidic coal gangue2022年6月26日 Response 7: Most of the literature on coal gangue aggregate concrete is from China, so the title is changed to “Using Chinese coal gangue as an ecological aggregate and their modification: A review” according to the overall content Point 8: Figure 4 needs more explanation What are the key findings in this figure?Using Chinese Coal Gangue as an Ecological Aggregate and Its 2024年7月22日 The feasibility and performance of using calcined coal gangue (CCG) to substitute metakaolin (MK) as the precursor to prepare alkaliactivated materials (AAMs) were thoroughly evaluated by conducting combined Investigation of Using Calcined Coal Gangue as the Co
Experimental investigation on the mixture optimization and failure
2024年5月1日 Conventional coal mining industries are associated with significant environmental issues including ground collapse and subsidence, water pollution and loss, and mining waste disposal [[1], [2], [3]]For example, the coal mining, processing and burning generate 795 million tons of coal gangue and 650 million tons of fly ash in 2020, posing a huge challenge for the 2019年12月1日 The utilization amount of coal gangue was 480 million tons in 2013, accounting for 64% of the total output, of which approximately 150 million tons of coal gangue were used for power generation (32%), 56 million tons for the production of building materials (12%), and 260 million tons for land reclamation (56%) (National Development and Reform Commission, 2014)Comprehensive utilization and environmental risks of coal gangue: A 2024年9月20日 Coal gangue contains a portion of clay minerals, and after thermal activation of about 700 ℃, the kaolinite in calcined coal gangue (CCG) can be transformed into metakaolin, which has pozzolanic activity and can be used as supplementary cementitious materials (SCMs) [10], [11], [12]This can not only consume a large portion of discharged coal gangue, but also Improvement of strength and microstructure of lowcarbon 2021年2月21日 CFA of coal gangue disposal In this case, CFA was performed with the objective of estimating the CO 2 emissions related to the disposal activity of CG Globally, there is no uniform mode of disposal for CG, for the brevity of study, the disposal method considered is specific to Bhupalpally mine site, Telangana State, IndiaUtilization of Coal Gangue for Earthworks: Sustainability Perspective
How to Recycle and Process Coal Gangue: 7 Effective Ways
2023年8月31日 The coal gangue is crushed and screened in the coal preparation plant to form small particles (less than 6 cm) These particles are then paved into a roadbed with a thickness of about 35 cm After compaction, the density can reach 18 t/m 3 so that the roadbed has good waterproof performance and durability and is more costeffective2024年4月1日 Industrial solid waste coal gangue (CG) is used as the research object, and the mechanical activationwater washing pretreatment method was used to explore the feasibility of carbon removal by water washing and the improvement and microscopic mechanism of the treatment process on the cementitious activity of CG The mechanism and effect of Safe and environmentally friendly use of coal gangue in C30 To accelerate the insitu utilization of coal gangue, this paper explored coal gangue aggregates (CGA) as the single aggregate source to prepare shotcrete used for coal mine tunnel underground in Liheng ZHANG PhD Tongji University, Shanghai ResearchGate2023年12月8日 During the extraction and processing of coal, a large amount of solid waste, collectively known as gangue, is produced This gangue has a low carbon content but a high ash content, accounting for approximately 15 to 20% of the total coal yield Before coal is used, coal and gangue must be effectively separated to reduce the gangue content in the raw coal and Coal and Gangue Classification Based on LaserInduced
Carbon Footprint Analysis of Coal Gangue in Geotechnical
2019年9月28日 Coal gangue is a mine waste generated during the mineral processing phase of coal production With the surge in demand for coal in thermal power, steel and cement generation industries, the rate of coal gangue generation has reached unprecedented heights With the realisation of potential threat posed by coal gangue, researchers have made attempts to