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
Physical properties of pure coal gangue
Physical properties of the coal gangue ResearchGate
Coal extraction in China is increasingly moving towards colder regions such as Xinjiang and Inner Mongolia However, these mines face land restoration challenges due to a scarcity of fertileIn this paper, coal gangue was proposed to replace part of the river sand to produce coal gangue fine aggregate concrete, while waste polyethene terephthalate (PET) bottles were used as rawPhysical properties of coal gangue, including property 2020年12月5日 The specific heat capacity (C p), thermal conductivity (λ), and thermal diffusion coefficient (D) of coal gangue (CG) are the main factors that affect the selfignition potential for Experimental study of thermophysical properties of coal gangue at 2020年2月5日 Physical properties assist in classifying coal gangue for geotechnical engineering applications The physical properties considered are specific gravity, grain size distribution, Characterization studies on coal gangue for sustainable geotechnics
Activation Mechanism of Coal Gangue and Its Impact
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 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 factors on the mechanical properties of the same geological conditions coal gangue applied to concrete; few researches concern the effect of physical properties and chemical composition Effect of Physical and Chemical Properties of Coal Gangue Under 2024年2月28日 Gangue material in the process of bearing pressure, subject to extrusion movement occurs crushing deformation, particles of the deformable space affects the Study on the macro–micro evolution of compaction Nature
Review Highcapacity utilization of coal gangue as supplementary
2024年7月12日 The physical properties of CG are also influenced by the types and composition of minerals present In its original state, CG exhibits a larger particle size with a high content of 2024年2月28日 Tests on the basic properties of gangue materials As shown in Fig 2, the composition of gangue was analysed by RXD spectroscopy in this experimentThe experimental results show that the main Study on the macro–micro evolution of compaction Nature2024年6月8日 Highvalue comprehensive utilization of coal gangue solid waste, reducing synthesis cost and environmental hazards has become an important research direction for green development In this study, acid–alkali treated coal gangue was used as the silica source, and abundant cotton short staple in Xinjiang was used as the raw material of aerogel Preparation and adsorption properties of cotton linters and coalgangue 2022年9月15日 Coal gangue is one of the industrial solid wastes that may harm the human body through the ecosystem for a long time Using coal gangue in geopolymer preparation can effectively reduce cement output and meet the Activation Mechanism of Coal Gangue and Its Impact
Research Progress on Comprehensive Utilization of Coal Gangue
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 2022年10月27日 At present, the preparation of activated coal gangue mainly adopts the method of calcining lumpy materials in a stacked state, and the calcination time is generally as long as 2–6 h, which not only exhibits high energy consumption but also causes the unstable quality of the product [15 – 19]Suspension calcination technology is a new process used for gangue Properties and Hydration Mechanism of Cementitious Materials 2023年11月9日 To assess the freeze–thaw (FT) durability of coal gangue pervious concrete (CGPC) in different FT cycle media (water, 35 wt% NaCl solution), experimental studies on 36 groups of cube specimens and 6 groups of prismatic specimens were carried out, with designed porosity, FT cycling media, and FT failure times as variables The changes in apparent Experimental Study and Analytical Modeling on Properties of 2024年8月23日 Due to the abundance of microcracks, voids, and a higher carbon content, coal gangue displays increased water absorption and crushing value, while also having a lower apparent density compared to natural aggregates [15], [16]These shortcomings lead to reduced durability and mechanical properties when coal gangue is employed as a concrete aggregate, Enhancing coal gangue aggregates with fly ashcement slurry
Reactivity activation of waste coal gangue and its impact on the
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 2020年4月14日 22 Experiment The chemical composition measured by Bruker S8 TIGER XRF analysis; the mineralogical composition measured via Bruker D8 ADVANCE XRD analysis; thermal analysis conducted with Mettler Toledo analyzer in a temperature range of 30–1000 °C at a heating rate of 10 °C/min and N 2 or O 2 atmosphere Mortar strength test: prismatic mortar Identification and Activation of Coal Gangue and Performance 2020年5月1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 Effect of Physical and Chemical Properties of Coal Gangue Under 2023年3月3日 Coal gangue (CG) is a bulk industrial waste [17], [18]About 01–015 tons of CG were emitted during the mining and production of each ton of coal Accordingly, nearly 300 million tons of CG are generated in China every year [19], [20]The stockpiling of CG would not only occupy a lot of land resources, but also cause serious environmental pollution [21], [22], [23]Preparation of ceramsite from leadzinc tailings and coal gangue
Synthesis and characterization of zeolites NaA and NaX from coal gangue
2017年3月17日 Property of raw coal gangue and pretreatment gangue The XRD pattern shows that coal gangue used in the study primarily consists of kaolinite, quartz, and hematite (Fig 1a) The SEM image of surface topography shows that coal gangue presents a blocky, muddleheaded state (Fig 1b) The primarily chemical compositions of ICG and PCG used in the Request PDF On Mar 1, 2023, Zhongtao Luo and others published Preparation of ceramsite from leadzinc tailings and coal gangue: Physical properties and solidification of heavy metals Find Preparation of ceramsite from leadzinc tailings and coal gangue 2019年12月1日 The accumulation of considerable coal gangue not only occupies a great deal of land resource, but also results in serious environmental problems, eg, soil pollution, air pollution, and geologic hazards (Stracher and Taylor, 2004)The heat continues to accumulate during the accumulation process, which leads to spontaneous combustion with the oxidization of coal Comprehensive utilization and environmental risks of coal gangue: A 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 ScienceDirect
Experimental Study on Basic Properties of Coal Gangue Aggregate
The physical and mechanical properties of coal gangue aggregate were investigated firstly,and then the microstructure characteristics of different kinds of coal gangue aggregate were analyzedThe mechanical property of concrete containing coal gangue aggregate was also measuredThe results show that, the main composition of coal gangue is SiO2,which may 2022年9月30日 Scientific Reports Preparation of coal gangue ceramsite highstrength concrete and investigation of its physicomechanical properties Skip to main content Thank you for visiting naturePreparation of coal gangue ceramsite highstrength concrete and 2024年7月26日 Preparation of barium aluminosilicate based ceramsite from bauxite, coal gangue and barite: Physical properties, microstructure, and γray shielding behavior Author links open overlay panel Gaozhan Zhang a, Mengru Wang a, Jun Yang a, Mingming Wu a, Qingjun Ding b, Jiahao Zhu a, Kai liu c Show morePreparation of barium aluminosilicate based ceramsite from 2022年4月6日 Abstract Among coal miningrelated wastes, coal gangue (CG) is the heterogeneous waste generated during the mineral processing or coal washing phase of coal mining A thorough understanding of environmental concerns associated with the current model of The Sustainable Utilization of Coal Gangue in Geotechnical and
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 2021年6月21日 In this investigation, six groups of cemented coal ganguefly ash backfill (CGFB) samples with varying amounts of kaolin (0, 10, 20, 30, 40, and 50%) instead of cement are prepared, and their mechanical properties are Effects of Kaolin Addition on Mechanical Properties 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 Opportunities, challenges and modification methods of coal gangue 2022年3月30日 1 Introduction Coal gangue is a solid waste produced in coal mining and production, due to the lack of effective comprehensive utilization technology coal gangue is mainly disposed of in stockpiles, not only occupying JRM Free FullText Properties and Hydration
Experimental Research on Improving Activity of Calcinated Coal Gangue
2023年3月28日 In this investigation, nonspontaneous combustion coal gangue was activated by two methods: (1) lowtemperature calcination and (2) calcium addition Differences in the activity of the activated coal gangue were studied at various calcination temperatures and amounts of calcium addition Meanwhile, the cementation activity of the activated coal gangue was 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 2022年12月1日 Coal gangue, a waste produced during coal mining, has been regarded as the largest source of industrial waste in China It is estimated that the production of 1 t coal generates 01–025 t coal gangue [1], and the total stockpile of coal gangue exceeds 6 billion tons in China [2], [3]The coal gangue not only occupies agricultural land in large areas but triggers Exploring calcined coal gangue fines as the total substitute of fly Materials 2020, 13, 2442 2 of 16 the most massive industrial solid waste in China The main chemical components of coal gangue are SiO2 and Al2O3, and the activity of raw coal gangue is very deficient; it shows pozzolanic activity after calcination at 700 C, which has similar chemical characteristics with fly ash and metakaolin Slag belongs to the material of high calcium Characteristics of AlkaliActivated Coal GangueSlag Mortars
Research progress of highvalue utilization of coal gangue
The coal gangue in China is the core field of bulk solid waste comprehensive utilization due to its massive stock and emission, high concentration of output, small proportion of highvalueadded utilization, and outstanding environmental impact Hence, the prospect of resource utilization of coal gangue is broad The existing disposal capacity and scale of coal gangue obviously 2020年2月5日 The following physical properties of coal gangue are discussed in the subsequent sections Specific gravity The specific gravity values (Gs) ranged from 198 to 252 for 0425 mm and 475 mm passing fractions, respectively The relatively lower Gs value for coal gangue compared to normal soils Characterization studies on coal gangue for sustainable geotechnics2010年12月1日 Five mixtures with A/B ratio for 30/70, 38/62, 46/54, 54/46, and 62/38 were prepared, and the effect of A/B ratio on physical properties of coal gangue coarse aggregate, Experimental study on basic properties of coal gangue aggregatePDF On Jan 1, 2023, Zhaopeng Wang and others published Properties and Hydration Mechanism of Cementitious Materials Prepared from Calcined Coal Gangue Find, read and cite all the research you (PDF) Properties and Hydration Mechanism of
Mechanical properties and chloride permeability of green
2020年2月10日 The proportion of coal gangue replacing cement was fixed at 20% 200, 325, 500, 1250, 5000 represented 200 mesh, 325 mesh, 500 mesh, 1250 mesh and 2000 mesh of coal gangue fineness respectively The unit “mesh” was used to describe the fineness of coal gangue For example, 50 mesh refers to 50 holes per square inch2023年3月1日 Utilization of highfiller coal gangue (CG) to produce costeffective composites is a promising strategy To clarify the impact of highfilled CG on composite preparation and performance, in this research, the composite was prepared from CG and polyethylene (PE) through physical mixing and then hotpressingA facile green and costeffective manufacturing process from coal 2024年8月23日 How to effectively deal with coal gangue and improve its properties is vital to achieving the efficient and safe resource utilization of coal gangue in concrete Studies have shown that the crystal structure of gangue can be changed by using methods such as calcination and mechanical grinding to improve its activity [12] , [13] Enhancement mechanism of microbial mineralization modified coal gangue The substrate made of coal gangue has more inferior physicalchemical properties Considering the indicators, the conclusion is that several indicators of B test plot are better than the others, so a soil depth of 7080 cm is a more economical and rational topsoil depth for reclaimed land when using coal gangue as a fillerPhysical and chemical properties and distribution characteristics
Research on proportion and performance optimization of pure gangue
2024年3月1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 properties2020年12月7日 Study of Mechanical Properties and Durability of AlkaliActivated Coal GangueSlag Concrete December 2020; (calcined and uncalcined) with a diameter of 475–20 mm The physical Study of Mechanical Properties and Durability of AlkaliActivated Coal and low pollution [6] Coal gangue and biomass have complementary characteristics, and the mixed pyrolysis of coal gangue and biomass provides a new approach for their comprehensive utilization [7] This method can save energy and be conducive to environmental protection Its pyrolyzed solid product, biochar, isExperimental study on mixed pyrolysis of biomass and coal gangue2023年11月16日 Cemented backfill mining is a green mining method that enhances the coal mining rate and the safety of minedout regions To transport the cemented gangue backfill material (CGBM) into the minedout regions, it is essential to ensure high flowability and adequate compressive strength after hardening Based on the response surface methodology (RSM), 29 Rheological and mechanical performance analysis and proportion
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