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2023921 This study uses grinding and calcination to activate coal gangue and uses orthogonal experiments combined with the GA-BP model to optimize the activation احصل على السعر
AbstractIntroductionExperimentResults and DiscussionConclusionData AvailabilityAdditional PointsAcknowledgments
Mineralogical characterizations of different meshes of coal gangue powder were analyzed by XRD (Figure 7). The main components of coal gangue powder are quartz, kaolin, and Al2O3. When coal gangue powder was milled to 20–100 mesh, 100–180 mesh, and 180–300 mesh, the crystallization peak of kaolin (2θ = 12.370°, 2θ = 54.613°, 2θ = 59.660°, and 2θ = ...
2023103 Hence, research is underway on grinding coal gangue into powder and using it as a substitute for ordinary Portland cement. Currently, research on coal gangue احصل على السعر
What kind of machine is suitable for grinding coal gangue into powder? This is a widely concerned issue for customers who want to recycle and reuse coal gangue. Coal gangue احصل على السعر
2022915 The principle of CGG preparation is to grind CG mechanically into coal gangue powder (CGP) to produce certain activity. CGP shows high activity due to the احصل على السعر
Abstract. In this study, the calcined coal gangue was mixed with Al powder at different mass fractions (5wt% 〜35wt%). After being pressed at 80MPa and sintered at 1200℃ for 2h, احصل على السعر
2022626 Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications. Producing concrete with coal gangue aggregate is one of the green sustainable development احصل على السعر
2021928 Last Updated: 09 Sep 2023. PDF Coal gangue, an industrial waste, is rich in silicon and aluminum phase and may be used as a mineral admixture in concrete after احصل على السعر
Abstract: A new model DSR-SSD for coal gangue fast identification is proposed based on the SSD model to address the issues of large parameter quantities and low operating احصل على السعر
2022913 Coal gangue can be made into coal gangue powder by grinding with an ultrafine powder mill. Coal gangue powder is widely used in the construction field. 1. Brick making with coal gangue powder. Coal gangue powder is the raw material for making solid gangue bricks, porous load-bearing gangue bricks, hollow gangue bricks and other brick احصل على السعر
2019121 When alkaline dry powder or NaOH solution was used as the activator, the compressive strength and the flexural strength of coal gangue concrete was 27.9% and 21.3% higher than that of ordinary concrete, respectively. Through grinding of coal gangue, the reactivity of kaolinite is improved by removal of hydroxyls (Frost et al., 2002, احصل على السعر
Statistical analysis suggests that coal gangue constitutes 10% to 15% of raw coal production [3], which equates to 368 to 552 million tons generated annually. Further, the total inventory of coalاحصل على السعر
202314 To reveal how CaF2 improves the dissolution ratios of aluminum and iron ions in coal gangue, CaF2 and hydrochloric acid are used to extract Al3+ and Fe3+ from the coal gangue calcined powder. The leaching ratios of Al3+ and Fe3+ are measured, and the filter residues are analyzed by BET, XRD, and SEM. The results show that adding 3% احصل على السعر
2022915 The principle of CGG preparation is to grind CG mechanically into coal gangue powder (CGP) to produce certain activity. CGP shows high activity due to the Si–O bond fracture. The aluminum–oxygen layer easily bonds with the silicon-oxygen tetrahedral group with a low polymerization degree, realizing secondary utilization as a resource.احصل على السعر
2022624 The chemical reaction between calcium ions (Ca2+) and phosphate in the soil is the main way to maintain the availability of soil phosphorus. Thus, we believe stimulating coal gangue with Ca2+ solution would be an effective way to improve its adsorption and desorption capacity toward phosphate. In order to explore the effects of احصل على السعر
2020515 Thermal activation also positively disrupts the stable structure of coal gangue and stimulates its activity. Li et al. [28] and Zhang et al. [29] have studied the effects of the coal gangue powderاحصل على السعر
2021728 Coal-gasification slag (CGS) was subjected to mechanical grinding by three different methods. We studied the effects of mechanical activation on various physical and chemical characteristics of the CGS, including particle-size distribution, specific surface area, mineral composition, degree of crystallinity, particle morphology, chemical bonding, احصل على السعر
2022225 Coal gangue contains many silicon-aluminum materials which can be geopolymerized under the excitation of alkaline agents. Coal gangue is a solid waste generated in the process of coal mining and washing, accounting for approximately 10% to 15% of the total coal output .Global coal production was about 7.4 billion tons, and coal احصل على السعر
2022119 Coal gangue was the main by-product of the coal mining and washing industries, and it is one of the most massive industrial wastes worldwide. It was reported that coal gangue accounts for about 15~20% of the coal output, and its emission exceeds 7 billion tons, with an annual increase rate of 150 million tons in China [1,2].Over time, احصل على السعر
2022225 Coal gangue contains many silicon-aluminum materials which can be geopolymerized under the excitation of alkaline agents. Coal gangue is a solid waste generated in the process of coal mining and washing, accounting for approximately 10% to 15% of the total coal output .Global coal production was about 7.4 billion tons, and coal احصل على السعر
2022119 Coal gangue was the main by-product of the coal mining and washing industries, and it is one of the most massive industrial wastes worldwide. It was reported that coal gangue accounts for about 15~20% احصل على السعر
You can buy factory price coal gangue from a great list of reliable China coal gangue manufacturers, suppliers, traders or plants verified by a third-party inspector. Source with confidence. Sand Making Machine,Powder Grinding Mill,Mineral Processing Equipment,Mobile Crushing Plant : Mgmt. Certification: ISO 9001, ISO 9000, ISO 14001احصل على السعر
2023128 Table 1 Chemical composition of coal gangue, shale and slag powder (wt%) Loss CaO SiO 2 Al 2O 3 Fe 2O 3 MgO Coal gangue 12.11 1.12 56.62 21.59 3.41 0.70 The calcined samples were placed in a ball miller to grind to a fineness of 90 % of particles smaller than 80 µm. The test method of pozzolanic activity of the calcinedاحصل على السعر
2023328 In this investigation, non-spontaneous combustion coal gangue was activated by two methods: (1) low-temperature 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 احصل على السعر
202311 The mineral composition of coal gangue mainly comprises kaolin, quartz, feldspar, and calcite. The hardness value of coal gangue is about 3, and the compressive strength ranges between 300 and 4700 Pa; the more severe its degree of weathering is, the lower its compressive strength. This material’s plasticity and shrinkage are both poor.احصل على السعر
Abstract. In this study, the calcined coal gangue was mixed with Al powder at different mass fractions (5wt% 〜35wt%). After being pressed at 80MPa and sintered at 1200℃ for 2h, the coal gangue/Al cermet material were polished on the metallographic polishing machine. 2.2 Characterization BSA224S-CW electronic balance was used to measureاحصل على السعر
2021728 Coal-gasification slag (CGS) was subjected to mechanical grinding by three different methods. We studied the effects of mechanical activation on various physical and chemical characteristics of the CGS, including particle-size distribution, specific surface area, mineral composition, degree of crystallinity, particle morphology, chemical bonding, احصل على السعر
2019121 Coal gangue is a mixture of a variety of rock and mineral composition with low carbon content. Normally, its calorific value increases with the increase of carbon mass fraction and volatiles, in contrast, decreases with the increase of ash. Because of the high content of SiO 2 and Al 2 O 3, the ash melting point of coal gangue is quite highاحصل على السعر
2022820 Mainly because abundant active Al 2 O 3 and SiO 2 released by thermally activated coal gangue powder at 800 °C reacted with the cement it is feasible to prepare concrete by crushing CG as an aggregate or grinding it instead of part or all cement as a cementitious material. Gao et al. (2021) replaced coarse aggregate with CG to prepareاحصل على السعر
