HOME→Can coal gangue be used as coal ash Can stone powder be used as coal ash Can coal gangue powder be used as coal ash
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Can coal gangue be used as coal ash Can stone powder be used as coal ash Can coal gangue powder be used as coal ash
Exploring calcined coal gangue fines as the total substitute of fly
2022年12月1日 This paper investigated the feasibility of upcycling coal gangue fines (CGF), a secondary waste generated during the production of coal gangue aggregates, as the substitution of fly ash to prepare alkaliactivated slag materials (AASM) CGF was thermally activated by The highvalueadded researches are likely to be a major method for the increased use of coView Article2019年12月1日 The highvalueadded researches are likely to be a major method for the increased use of coal gangue It has been found that the slag after combustion of coal gangue Comprehensive utilization and environmental risks of coal gangue: 2020年1月15日 The results showed that coal gangue can be effectively used as a planting substrate together with maize straw, fly ash, and water retention agents to improve the Optimizing the formulation of coal gangue planting substrate
Characterization studies on coal gangue for sustainable geotechnics
2020年2月5日 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 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 Comprehensive utilization and environmental risks of coal gangue: 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 Study on mechanical properties of coal gangue and fly ash 2024年9月7日 The resourceful utilization of coal gangue as soil conditioners, particularly the modified coal gangue, not only facilitates the harmless and resource treatment of substantial Opportunities, challenges and modification methods of coal
The Sustainable Utilization of Coal Gangue in Geotechnical and
2022年4月6日 Among coal miningrelated wastes, coal gangue (CG) is the heterogeneous waste generated during the mineral processing or coal washing phase of coal mining A 2022年1月25日 Lack and quality decrease of supplementary cementing materials (SCMs) such as fly ash and granulated blastfurnace slag is increasingly prominent in China Thus, the use of coal gangue (CG) and coal Durability of Concrete With Coal Gasification Slag and 2021年8月2日 Coal gangue concrete (CGC) with 30% fly ash (FA) content has the best workability and strength The modification effect of FA on the working properties and strength Effect and mechanism of coal gangue concrete modification by fly 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
Coal Education
2024年11月15日 Coal is a black or brownishblack sedimentary rock that can be burned for fuel and used to generate electricityIt is composed mostly of carbon and hydrocarbons, which contain energy that can be released through 2022年1月25日 Introduction Concrete is the most used material in construction and building engineering Supplementary cementing materials (SCMs) such as fly ash (FA) and granulated blastfurnace slag (GGBS) are also used in the Durability of Concrete With Coal Gasification Slag and 2015年4月1日 Environmental value is the people’s cognition on belief, attitude, rational consideration and value of the environment In 1995 O Brien and Guerrier pointed that environmental value is advisory and supportive activities of environmental concern and responsibility []With the transformation of social formation, human’s value judgment on the New technology and application of brick making with coal fly ash2024年11月1日 Following JTG 3430 − 2020 Chinese Standard for Soil Test Method, the following parameters can be obtained, the natural moisture content 220298%, the liquid limit 3146%, the plastic limit 20 Investigating the compaction and the mechanical behaviors of coal
An alternative approach to improve the compatibility of PCE in
2023年11月20日 Coal gangue (CG) is an environmental waste that faces an urgent demand for disposal in China The utilization of CG in construction materials has broad application prospects and gained increasing interest However, the poor compatibility of polycarboxylate superplasticizer (PCE) with CG powder hinders its efficiency in a wide range of applications Here, this paper 2021年9月1日 Coal gangue was collected from Ordos mining area, China The mineral phase was characterized by XRD (Fig 1 (a))Kaolinite (Al 2 O 3 2SiO 2 2H 2 O) and quartz (SiO 2) were the main crystalline minerals in raw coal gangueThe chemical composition is listed in Table 1The mineral composition of raw coal gangue is given in Table 2Results show that the raw Performance of microwaveactivated coal gangue powder as 2019年6月2日 According to the different types of filling materials used in coal mine filling mining, it can be categorized into bulk material filling, such as raw gangue, coal gangue paste filling, and high (PDF) Study on Filling Material Ratio and Filling Effect2023年2月11日 Fly ash powder affects the environment, but it has a different direct impact on the human body Figure 5 summarizes the effects of fly ash powder on the environment and the human body The figure shows that due to rain in the landfill and ash ponds leads to the leaching of various toxic metals such as lead, cadmium, arsenic, mercury, etc, pollutes the A Review of Coal Fly Ash Utilization to Save the Environment
Reutilisation of coal gangue and fly ash as underground backfill
2020年5月1日 The coal gangue and fly ash used in the experiments were collected from a gangue dump and a power plant in the Coal Mine, respectively In practical applications, due to the limitations of the backfill process and equipment, only gangue with a particle size of 50 mm or less is generally used for backfill (Li et al, 2017, Li et al, 2017)2019年12月1日 Because of the high content of SiO 2 and Al 2 O 3, the ash melting point of coal gangue is quite high, ranging from 1050 °C to 1800 °C, thus it can be used as refractory material Its chemical composition mainly includes SiO 2 , C, Al 2 O 3 Fe 2 O 3 , CaO, MgO, K 2 O and NaComprehensive utilization and environmental risks of coal gangue: A 2010年1月14日 Flyash production depends on the quality of the coal, which contains a relatively high proportion of ash that leads to 1030% Flyash formation (Singh and Siddiqui, 2003)In India 75% of electricity is generated by coal based thermal power plants, according to the data revealed in Table 1, provided by Government of India 112 million tones of this kind of waste is Use of Flyash in Agriculture: A Way to Improve Soil Fertility and its 2022年6月26日 The coal consumption yearonyear growth rate of the world since 2010 (data from International Energy Agency Statistics, 2020) Using Chinese Coal Gangue as an Ecological
Durability of Concrete With Coal Gasification Slag and Coal Gangue Powder
2022年1月26日 Integrating recycled aggregates (RAs) and coal gangue powder (CGP) into concrete is an effective approach for waste management However, CGP can affect the performance of traditional recycled 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 Gangue2024年7月12日 Coal gangue (CG), which accounts for about 10–20 % of coal output, is a kind of solid waste generated during the coal mining and washing processes According to Fig 2 , the annual output of CG in China fluctuates between 600–800 million tons, with a utilization rate hovering around 70 %Review Highcapacity utilization of coal gangue as supplementary 2022年2月28日 Coal gangue (CG) represents a huge amount of industrial solid waste in China, and usually is used as a coarse aggregate to produce lowstrength coalganguebased concrete In this paper, in order to prove the possibility to obtain a higherstrength concrete with a higher CG utilization rate, reactive powder concrete (RPC) with coal gangue as a sand replacement at Mechanical Properties of Reactive Powder Concrete with Coal Gangue
Preparation of coal gangueslagfly ash geopolymer
2022年4月1日 Zhao et al used uncalcined coal gangue and municipal solid waste incineration fly ash to prepare cementitious materials and found that the formation of NASH in the stone body provided strength 2020年1月15日 Therefore, coal gangue can be used as a substitute for the soil currently used The optimum composition ratio of the coal gangue planting substrate is as follows: coal ganguetosoil ratio of 1:1 (500 g:500 g), maize straw content of 50 g kg −1, fly ash content of 37 g kg −1, and water retention agent content of 1 g kg −1Optimizing the formulation of coal gangue planting substrate 2022年4月18日 Coal gangue is a solid waste produced during coal production, and it accounts for 10%∼25% of the material produced in coal mining China alone has accumulated more than 7 billion tons [5], [6], and accordingly, coal gangue is one of the mining solid wastes with the largest emissions in ChinaGeopolymers are enriched in silicaalumina (metakaolin) minerals or Preparation of coal gangueslagfly ash geopolymer grouting 2024年2月1日 Lightweight aggregate prepared by mixing CG with sludge and coal ash has also been found to meet regulatory the life cycle method (Tao et al, 2022) is used to verify that coal ganguebased cementitious materials and concrete are feasible ways of CG and CG powder are consolidated in cement stone by cement and other Representative coal gangue in China: Physical and chemical
The Sustainable Utilization of Coal Gangue in Geotechnical and
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 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 modification by fly ash2024年4月18日 Why is coal ash reused? Reusing coal ash can create many environmental, economic, and product benefits including: Environmental benefits such as reduced greenhouse gas emissions, reduced need for disposing in landfills, and reduced use of other materials; Economic benefits such as reduced costs associated with coal ash disposal, increased Coal Ash Basics US EPA US Environmental Protection AgencyDOI: 101016/JJMRT202108106 Corpus ID: ; Performance of microwaveactivated coal gangue powder as auxiliary cementitious material @article{Guan2021PerformanceOM, title={Performance of microwaveactivated coal gangue powder as auxiliary cementitious material}, author={Xiao Guan and Jixi Chen and Mengyu Zhu and Jie Gao}, journal={Journal Performance of microwaveactivated coal gangue powder as
Preparation of HighDuctility CementCalcined CoalGanguePowder
2023年8月9日 Coal gangue is a kind of solid waste A highductility cementcalcined coalganguepowdercompositebased rapid repair material (HDRRM) was prepared by partially replacing cement with calcined coal gangue powder (CCGP) for achieving high ductility and rapid hardening and conforming to the strength requirements of pavement layers First, the physical 2023年8月29日 Some studies have found that coal gangue powder (CGP) has the potential to be used as a filler in asphalt mixtures [14,15,16]Liu et al [] investigated the asphalt modification effect with different types of CGPThe results showed that these CGPs can enhance the performance of asphalt, especially its high temperature performanceMicrowave Heating Healing of Asphalt Mixture with Coal Gangue Powder 2022年10月15日 In order to explore the influence of gradation and concentration on the rheological parameters of uncemented coal ganguefly ash backfill (UCGFB) slurry, based on the fractal theory, the particle Study on Rheological Characteristics of Uncemented Coal GangueFly Ash 2023年6月7日 Zhao et al used uncalcined coal gangue and municipal solid waste incineration fly ash to prepare cementitious materials and found that the formation of NASH in the stone body provided strength, and the heavy metal ions in municipal solid waste incineration fly ash were solidified in the final formed geopolymer, reducing its toxicity [24]Experimental Study on Ratio and Performance of Coal Gangue/Bottom Ash
Comprehensive utilization and environmental risks of coal gangue
2019年12月1日 This study aims to provide a highvalue and environmentally friendly method for the application of coalbased solid waste Modified fly ash/polyurethane (MFA/PU) and modified coal gangue powder 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 2024年11月15日 Coal is a black or brownishblack sedimentary rock that can be burned for fuel and used to generate electricityIt is composed mostly of carbon and hydrocarbons, which contain energy that can be released through Coal Education2022年1月25日 Introduction Concrete is the most used material in construction and building engineering Supplementary cementing materials (SCMs) such as fly ash (FA) and granulated blastfurnace slag (GGBS) are also used in the Durability of Concrete With Coal Gasification Slag and
New technology and application of brick making with coal fly ash
2015年4月1日 Environmental value is the people’s cognition on belief, attitude, rational consideration and value of the environment In 1995 O Brien and Guerrier pointed that environmental value is advisory and supportive activities of environmental concern and responsibility []With the transformation of social formation, human’s value judgment on the 2024年11月1日 Following JTG 3430 − 2020 Chinese Standard for Soil Test Method, the following parameters can be obtained, the natural moisture content 220298%, the liquid limit 3146%, the plastic limit 20 Investigating the compaction and the mechanical behaviors of coal 2023年11月20日 Coal gangue (CG) is an environmental waste that faces an urgent demand for disposal in China The utilization of CG in construction materials has broad application prospects and gained increasing interest However, the poor compatibility of polycarboxylate superplasticizer (PCE) with CG powder hinders its efficiency in a wide range of applications Here, this paper An alternative approach to improve the compatibility of PCE in 2021年9月1日 Coal gangue was collected from Ordos mining area, China The mineral phase was characterized by XRD (Fig 1 (a))Kaolinite (Al 2 O 3 2SiO 2 2H 2 O) and quartz (SiO 2) were the main crystalline minerals in raw coal gangueThe chemical composition is listed in Table 1The mineral composition of raw coal gangue is given in Table 2Results show that the raw Performance of microwaveactivated coal gangue powder as
(PDF) Study on Filling Material Ratio and Filling Effect
2019年6月2日 According to the different types of filling materials used in coal mine filling mining, it can be categorized into bulk material filling, such as raw gangue, coal gangue paste filling, and high 2023年2月11日 Fly ash powder affects the environment, but it has a different direct impact on the human body Figure 5 summarizes the effects of fly ash powder on the environment and the human body The figure shows that due to rain in the landfill and ash ponds leads to the leaching of various toxic metals such as lead, cadmium, arsenic, mercury, etc, pollutes the A Review of Coal Fly Ash Utilization to Save the Environment2020年5月1日 The coal gangue and fly ash used in the experiments were collected from a gangue dump and a power plant in the Coal Mine, respectively In practical applications, due to the limitations of the backfill process and equipment, only gangue with a particle size of 50 mm or less is generally used for backfill (Li et al, 2017, Li et al, 2017)Reutilisation of coal gangue and fly ash as underground backfill