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Comprehensive utilization and environmental risks of coal
2019年12月1日· In addition to brick making, the proportion of coal gangue is only about 30%, thus, vigorous efforts should be made on new technologies to produce high quality2016年6月8日· The resource utilization of coal gangue is conducive to decreasing its ecological damage and enhancing industrial added value The common ways to utilizeUtilization of coal gangue for the production of brick
Utilization of coal gangue for the production of brick,Journal of
2016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 was2014年1月1日· The properties of coal gangue The main chemical compositions (Table 1) of coal gangue are SiO 2 (54–60%), Al 2 O 3 (23–27%), Fe 2 O 3 (6–9%) and CaOThe environmental characteristics of usage of coal
The environmental characteristics of usage of coal
2014年1月1日· Coal gangue brick Firing process Natural radionuclide Toxic element Behavior 1 Introduction Toxic elements in atmosphere may affect humans directly2021年3月1日· Abstract According to the phenomenon of the accident of defective products of finished bricks, combined with fuzzy mathematics and fault tree analysisAnalysis and improvement measures of defective coal gangue
Characterization studies on coal gangue for sustainable
2020年2月5日· The coal mining activity involves the release of waste at different levels of its execution, and the largest among such wastes is coal gangue, which accounts for2021年5月5日· The coal gangue contains fine particles with a particle size less than 475mm, coarse particles larger than 475mm k w is the coal gangue finerough grain ratio The coal gangue finerough ratios afterField study on the improvement of coal gangue filling
Application of Coal Gangue as a Coarse Aggregate in Green
2021年11月11日· The influence of coal gangue on the durability of coal gangue concrete is remarkable, resulting from the porous structure of coal gangue that provides more2016年6月8日· Abstract 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 andUtilization of coal gangue for the production of brick
A concrete material with waste coal gangue and fly ash used for
2016年1月20日· Therefore, the concrete mix proportion of mix V (coal gangue replacing 30% of the gravel and fly ash replacing 15% of the cement) The environmental geochemistry of trace elements and naturally radionuclides in a coal gangue brickmaking plant Sci Rep, 4 (2014) Google Scholar Zong et al, 2014Coal gangue was used to make cementitious materials [24–27], but the highest utilization rate is just 52 % [27] To consume coal gangue in large scale and to protect the cultivated land, Chinese Government recently encourages the brickmaking enterprises to manufacture brick from coal gangue instead of clay As the chemical and mineralUtilization of coal gangue for the production of brick Springer
Ecological Mortar from Recycled Composite Powder with Waste Clay Brick
2022年11月28日· The coal gangue of Xintai Coal Mine was select ed in this tes t The mark of complex Por tland cement use d in the test is P C 425, and the pr opert ies of ceme nt can meet the Chinse d protocoTo reduce the amount of cement used in cemented coal gangue backfill (CCGB, a mixture of coal gangue, cement, fly ash, and water), mechanical and deformation properties of CCGB in which CSFA partially replaces the cement (0, 10, 20, 30, and 40 wt%) were studied Compressive strength, acoustic emission during uniaxial loading, shear strength,Effects of Corn Stalk Fly Ash (CSFA) on the Mechanical and
Influence of biomass on multicomponent reaction model and
2022年6月1日· Coal gangue (CG) was collected from a shale hollow brick factory in Hefei, Anhui Province Peanut shell This shows that the increase of biomass increases the toxicity of Ni The proportion of F3+F4 in the C1P1 ash sample in Fig 11 f is greater than that of CG ash, C3P1 ash, and C1P3 ash,2022年1月31日· The mechanical properties and water permeability of the allsolidwastebased permeable bricks were evaluated The results proved that the porous channel of permeable brick is mainly composed of waste ceramic materials with a particle size of 23 mm Pore structures below 200 μm were mainly composed of fine aggregate and mixedMicrostructure Evolution and Improved Permeability of Ceramic
The Environmental Geochemistry of Trace Elements during
2015年6月10日· The potential environmental hazards posed by trace elements have reached serious proportions due to their An investigation of the transformation and distribution behavior of trace elements and natural radionuclides around a coal gangue brick plant was conducted Simultaneous sampling of coal gangue, brick, fly ash and2022年7月27日· The mass production of flotation tailings has become a serious risk to the environment Reconcentration of tailings is one of the best ways to solve this problem, which requires a better understanding of flotation tailings In the present work, flotation kinetics, timedrelease flotation, Xray diffraction (XRD), Fourier transform infraredAssociations of Gangue Minerals in Coal Flotation Tailing and
How To Effectively Use Coal Gangue?
2021年10月13日· Coal Gangue Pulverizer Raymond Mill Finished product fineness: 80325 mesh Production capacity: 15100t/h It is suitable for the processing of more than 300 kinds of highfine powder materials in nonflammable and explosive mineral, chemical, construction and other industries with Mohs hardness not greater than 7 and humidity2021年1月25日· In most of the studies on coal gangue concrete from the aspect of material, 50% coarse aggregate replacement ratio was commonly used as the maximum replacement ratio whilst 100% coarse aggregate replacement ratio was also investigated by some researchers [8]Since the aim of this study is to maximize the application efficiencyUtilization of coal gangue as coarse aggregates in ScienceDirect
Influence of coal gangue mulching with various thicknesses and
2021年7月28日· The coal gangue having undergone no weathering was taken from the gangue dump Meanwhile, near the gangue dump, a soil profile about 500 cm high formed due to the continuous excavation of the2022年12月16日· The coal gangue after composite activation treatment is considered a potential lowcarbon and green cementitious material, so the feasibility of employing compositeactivated gangue to partially orMechanical Performances and Frost Resistance of Alkali
Manufacturing of Bricks From Coal Mine Overburden Dump of
maximum CS of 95 N/mm2 was recorded for brick having overburden to cement ratio of 8:2 coal gangue powder with a binder such as sewage sludge and shale in different ratios used in this mix was ordinary Portland cement (OCP) The dry mixtures with different proportions were rstly mixed to homogenize for 10 min,2023年2月25日· In this experiment, the influence of coal gangue as the admixture on the performance of drymixed mortar was studied, and the results were analyzed by XRD and SEM The effects of different ways of crushing, particle size distribution, coal gangue, cement, admixture, and water content on the water retention, consistency, and 7 dExperimental Study on Preparation of DryMixed Mortar from Coal Gangue
Evaluation of static segregation of cemented ganguefly ash
2020年3月15日· Introduction Underground coal mining produces a large amount of gobs and solid waste, such as coal gangue [1], [2] To control the ground subsidence, reduce the environmental pollution resulting from the coal gangue accumulation, and realize effective utilization of the underground space, partial backfill mining and structural backfill mining2020年3月19日· The extensive research on coal gangue reuse aims at the following: preparation of gangue brick [10, 11] as raw materials to prepare ceramics [12,13,14,15,16,17], A Lu, Preparation and characterization of glassceramic foams with waste quartz sand and coal gangue in different proportions J Porous Mater 23,Preparation of porous cordierite ceramic with acidleached coal gangue
Experimental Study on Mix Ratio Design of High Coal Gangue
2023年2月14日· According to the material dosage in Table 4, mix it in a 30L horizontal concrete mixer for 3 min, pour the concrete into a 150 × 150 × 150 mm compressive test mold, put it into a concrete curing box for standard curing for 7d, and test its compressive strength []Because the water absorption of coal gangue was not considered in the2020年2月5日· The presence of silica and alumina along with the traces of clay minerals and residual coal fractions has led to the utilization of coal gangue in various applications such as power generation, fertilizer production, brick production, cement and concrete production, as a backfill material and a landfill liner material [15,16,17,18,19,20]Characterization studies on coal gangue for sustainable Springer
Study on Solidification Characteristics of Granular Coal Gangue:
2023年9月16日· Three groups of filling materials with different mix proportions were prepared PO425 grade cement was selected as the binding material, mechanized granular coal gangue and fine sand were used as the filling aggregate, and then the specimens were curing at room temperature and 95% moisture Through the uniaxial compression