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
Differences in the chemical properties of coal and coal gangue
Opportunities, challenges and modification methods of coal
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 2022年12月20日 For coal and gangue, intelligent sorting processes for separation, the use of coal and gangue mineral components with different fundamental differences, and the study of different properties of minerals and Research on the Identification Mechanism of Coal 2024年2月1日 Significant synergistic effects exist in the cocombustion heat release process of coal and coal gangue Coal gangue promotes the chain reaction of free radicals and heat Study on the thermal reaction characteristics and kinetics of coal 2020年4月30日 This paper investigated the influence of physical and chemical properties of coal gangue under different geological conditions and aggregate replacement rate (0, 30%, 60%, Effect of Physical and Chemical Properties of Coal Gangue Under
Coal and Gangue Classification Based on Laser
2023年12月8日 Before coal is used, coal and gangue must be effectively separated to reduce the gangue content in the raw coal and improve the efficiency of coal utilization This study introduces a classification method for 2023年11月14日 Studying the differences in oxidation characteristics between coal and gangue from the same coal seam is beneficial for spontaneous combustion This paper tested the Study on the Difference in Oxidation Characteristics of Coal and 2022年9月15日 In this paper, the physical and chemical characteristics, including the heavy metal content, of coal gangue from different producing areas are described Then, the mechanism of physical activation (mechanical and Activation Mechanism of Coal Gangue and Its Impact 2024年2月1日 Therefore, this study systematically investigated the basic physical and chemical properties of coal gangue and municipal sludge samples, the ecological environment safety Representative coal gangue in China: Physical and chemical
Effects of Fine Gangue on Strength, Resistivity, and
Coal gangue is a solid waste discharged during coal mining and washing processes The major chemical components of coal gangue are silica (SiO 2) and alumina (Al 2 O 3 ), whereas the mineral components are quartz and feldspar 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 2015年1月1日 The chemical characteristics of coal are determined by the chemical properties of various components of coal, and the different chemical reactions that occur among them under certain conditions These Chemical Characteristics of Coal SpringerLink2020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
Underground Disposal of Coal Gangue Backfill in China MDPI
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 2022年9月30日 Coal gangue (CG) is a type of industrial solid waste produced by the process of coal excavation and separation 1,2,3Generally, one ton of CG is discarded for every 10 tons of produced coal 4,5 Preparation of coal gangue ceramsite highstrength concrete and 2020年2月5日 The geotechnical properties of coal gangue revealed its potential as fill material in the construction of embankments and retaining walls Mineralogical and chemical characteristics of coal gangue are comparable to coal combustion residues like coal ash and fly ash which are widely used in bulk civil engineering applicationsCharacterization studies on coal gangue for sustainable geotechnics2024年7月1日 Geopolymers, as a novel cementitious material, exhibit typical brittle failure characteristics under stress To mitigate this brittleness, fibers can be incorporated to enhance toughness This study investigates the effects of varying polypropylene fiber (PPF) content and fiber length on the flowability, mechanical properties, and flexural toughness of coal gangue Properties of FiberReinforced Geopolymer Mortar Using Coal Gangue
Study of Mechanical Properties and Durability of AlkaliActivated Coal
2020年12月7日 Herein, a new geopolymer is recognized as a potential alternative cementing material of ordinary Portland cement (OPC), which is used for reducing carbon emissions and efficiently recycling the waste Therefore this paper mainly studied the alkaliactivated coal gangueslag concrete (ACSC) was prepared by using the coal gangueslag and Na2SiO3 and 2023年10月11日 Backfill mining can effectively alleviate the problems of surface collapse and ecological water pollution, in which the mechanical properties of backfill materials, including coal gangue and coal fly ash, have a decisive role in the effect of filling mining In this study, we analyze the permeability characteristics of coal gangue filler through a set of homemade Study on mechanical properties of coal gangue and fly ash 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 2024年2月1日 Scholars have carried out extensive research on the combustion process of coal and coal gangue In the study of the micromechanism of spontaneous combustion，Wang et al [12] explained the chain reaction mechanism of 12 key free radicals during coal spontaneous combustionChen et al [13] constructed a cycle model of free radicals during coal Study on the thermal reaction characteristics and kinetics of coal
Influence of coal gangue mulching with various thicknesses and
2021年7月28日 The effects of coal gangue and fly ash on the hydraulic properties and water content distribution in reconstructed soil profiles of coalmined land with a high groundwater table Hydrol Process 2023年5月9日 Keywords: coal gangue, low carbon materials, hydration products, activation, mechanical properties Citation: Zhu Z, Liu C, Mao L, Han Z, Chen L, Zou H, Li L, Yu P, Dong J and Zhang Y (2023) Study on the effect of Frontiers Study on the effect of activated coal 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 2022年9月15日 After physical activation, coal gangue is used in geopolymer preparation with a chemical activator (alkali excitation agent), which effectively forms a threedimensional silicon aluminate polymer Activation Mechanism of Coal Gangue and Its Impact on the Properties
Comprehensive utilization and environmental risks 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 2024年4月10日 To elucidate the effects of longterm (20 years) afforestation with different woody plant species on the soil microenvironment in coal gangue polymetallic contaminated areas This study analyzed the soil physicochemical properties, soil enzyme activities, soil ionophore, bacterial community structure, soil metabolite, and their interaction relationships at different The role of afforestation with diverse woody species in enhancing The effect of impurities in coal gangue on the sintering and properties (porosity and compressive strength) of porous cordierite ceramics has been investigated by adjusting the amount of impurities by controlling the acid–gangue ratio during acid leaching The sintering behavior and microstructure of the porous ceramics have been characterized via Xray diffractometry and Preparation of porous cordierite ceramic with acidleached coal gangue 2023年12月8日 Coal gangue is one of China’s main industrial solid wastes, which contains various harmful heavy metal elements, such as lead (Pb) The longterm accumulation of coal gangue causes Pb to migrate to the surrounding environment due to weathering and rain erosion, eventually endangering human life and health with its continuous accumulation in the food Migration transformation, prevention, and control of typical heavy
The structural and surface properties of natural and modified coal gangue
2017年4月1日 The content of trace elements in the coal gangue as well as the permissible values in soils and surface lands are shown in Table 2 The coal gangue contains trace metals in amounts much smaller than permissible The components of coal gangue are weakly leachable (see Table 3) The leached ions were mainly Na +, K +, Mg 2+, SO 4 2− and Cl −2023年5月25日 The treatment and utilization of coal gangue, one of the main solid wastes produced during coal mining, are of great significance in environmental protection and resource development In the contemporary Lowcarbon utilization of coal gangue under the 2019年12月1日 Coal gangue has been applied in building material, Its chemical composition mainly includes SiO 2, C, Al 2 O 3 Fe 2 O 3, CaO, MgO, K 2 O and Na Comprehensive utilization of coal gangue Combustion properties of coal gangue using thermogravimetry–Fourier transform infrared spectroscopy Appl Therm prehensive utilization and environmental risks of coal gangue: A 2022年12月26日 Top coal caving is a process for the rational extraction of large amounts of coal resources However, this process readily causes release of excessive amounts of gangue during the coal release process The conventional technique, which involves visual inspection, is not only laborintensive but also can introduce inaccuracies Coal and gangue identification methods A review of coal gangue identification research—application to
Coal gangue detection and recognition algorithm based on
2021年9月8日 Xiangang et al proposed a coal gangue recognition method driven by deep learning that is based on the differences in the surface characteristics of coal gangue; they also studied the coal gangue location method based on binocular stereo vision, which effectively improves the accuracy of coal gangue identification and location 2023年10月12日 As one of the main mineral wastes in China, coal gangue has shown great potential in concrete production as aggregates due to the good physical and chemical properties Research indicates that incorporating coal gangue into concrete not only safeguards the environment but also yields remarkable benefits [10], [25], [27], [51]Comparative study on mechanical and environmental properties of coal In terms of building materials, the chemical composition of coal gangue contains a large number of substances, such as silicon oxide and alumina [11, 12], which is very similar to the coarse and fine aggregate of concreteTherefore, aiming at the resource utilization of coal gangue, it has essential technical and economic significance to realize the resource utilization of waste and Study on the properties of recycled concrete mixed with coal gangue 2020年12月7日 Study of Mechanical Properties and Durability of AlkaliActivated Coal GangueSlag Concrete December 2020; Materials 13(23) and coal gangue and their main chemical composition is SiO 2Al 2 Study of Mechanical Properties and Durability of AlkaliActivated Coal
The relationships between heavy metals and bacterial
2023年4月1日 All statistical analyses were conducted using SPSS 220, and the data were described using average values and standard deviation Oneway ANOVAs were used to evaluate the significance of differences in soil physical and chemical properties, the type and content of heavy metals, and bacterial community composition among coal gangue sites2022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 (PDF) Underground Disposal of Coal Gangue Backfill in China2020年4月30日 This paper investigated the influence of physical and chemical properties of coal gangue under different geological conditions and aggregate replacement rate (0, 30%, 60%, 100%) on the compressive strength of coal gangue concrete (CGC) The Xray diffraction (XRD)Effect of Physical and Chemical Properties of Coal Gangue Under 2020年10月29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 their thermal stability characteristics using thermogravimetric/Fourier transform infrared techniques (TG/FTIR) at heating rates of 10, 20, Experimental and theoretical study on kinetic behaviour of coal gangue
Diffusion law of coal gangue slurry and the application of
2023年8月14日 According to the scanning electron microscope test results, coal gangue contains a large number of clay minerals (in sheet form), mainly kaolin, hematite, and other minerals, with a large number 2023年11月6日 Traditional Coal Gangue Separation Process and Equipment Water washing and dry coal preparation are the main parts of coal preparation Spiral separation, jigging, heavy medium separation, and other processes are Full article: A review of intelligent coal gangue 2021年8月2日 Coal gangue is a type of solid waste produced in the coal mining and washing processes The global coal mining industry produces approximately 350 million tons of inactive gangue each year, and the accumulated coal gangue in China alone amounts to 60 billion tons [1], [2], [3]In Spain, about 2 million tons of coal mine waste were produced in 2009Effect and mechanism of coal gangue concrete ScienceDirect2020年1月21日 Coal gangue was sampled from a coal waste dump in Huainan coalfield (Anhui, China) (32°49′070″N, 116°34′235″E) The coal gangue and tailings were air dried, sieved through a 2 mm mesh sieve and homogenized before use The physicochemical properties of the coal gangue and tailings are presented in Table 1Influence of coal gangue aided phytostabilization on metal
Influence of Coal Gangue Powder on the Macroscopic Mechanical
2023年10月3日 Zhang et al replaced natural sand with coal gangue sand in concrete and observed that coal gangue sand weakened the adhesive properties in the transition zone between mortar and coarse aggregates [ 5 , 34 37 ] Researchers investigated various volcanic ash materials and added them to concrete; These materials could improve the mechanical 2020年5月15日 Coal ganguebased geopolymer (CGGP) is one of the hot spots existing in the recycling of coal gangue resources due to its good comprehensive mechanical properties However, the coal gangue structure is stable and reactivity is poor, so the coal gangue needs to be activated before utilization In this paper, the microstructure changes of activated coal Experimental Study on the Characteristics of Activated Coal Gangue 2020年10月1日 The aim of this work is to study the impacts of Na⁺ and H2O on structural and mechanical properties of coal ganguebased geopolymer by experiment and molecular dynamicsThe effect of Na+ and H2O on structural and mechanical properties 2023年2月25日 Among them, five papers focus on the damage evolution and failure characteristics of coal and coallike materials under different conditions Four papers have studied the physical and chemical properties of new rock mass materials (coal gangue, coal tar pitch, freeze–thaw sandstone and anchored bedding rock mass)Microstructure, Characterization and Mechanical Properties of Coal
Study on the Reactivity Activation of Coal Gangue for Efficient
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 BackPropagation (BP) neural network model was improved using a genetic algorithm With the effects of grinding duration, calcination temperature, and