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2.2 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 …
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In order to explore the effects of different pH of Ca2+ solution on the modified effect of coal gangue, we conducted mechanical grinding (<1 mm), high temperature calcination (800 °C), and the ...
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Pass the gangue aggregate through a 0.075 mm square sieve, take part of the gangue powder under the sieve, weigh the raw materials according to Table 1, stir and mix them for 30 min, so that FDN and KN could be fully dissolved in water and adsorbed on the soil surface, and then stand for 24 h, after the soil was fully precipitated (Fig. 2 ...
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China's total coal production in 2021 exceeded 4.13 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 …
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This paper studies the scientificity of using thermal activation sludge (TSA) and coal-product: coal gangue (CG) into new gelling geological polymer. The coal gangue was replaced with sludge (<5μm) of 40%, which was calcined at 900°C for 45 minutes has good compressive strength. And the mechanism of the geopolymer was analysised …
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The exposed surface of fine-grained fluorapatite, on the other hand, is rather tiny, and the majority of them are entirely coated with gangue minerals. If primary grinding process is used, there ...
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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 requirements. This paper reviews the properties and preparation methods of Chinese gangue aggregate, studies the influence of gangue …
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To study the heterogeneity and local heterogeneity of gangue particle size distribution (PSD) under ball milling, gangue from northern Shaanxi coal mine was taken as a research object. The multifractal …
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1.. IntroductionCoal gangue is a complex industrial solid waste discharged when coal is excavated and washed in the production course. Its major chemical composition is SiO 2 and Al 2 O 3, and its major mineralogical composition is quartz and feldspar [1].The amount of coal gangue accumulated in China has already reached 3.8 …
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DOI: 10.1016/J.CONBUILDMAT.2015.10.144 Corpus ID: 138150330; Effect of mechanical grinding on physical and chemical characteristics of circulating fluidized bed fly ash from coal gangue power plant
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DOI: 10.1016/j.cej.2024.148941 Corpus ID: 267087587; Study on modes of occurrence and selective leaching of lithium in coal gangue via grinding-thermal activation @article{Chen2024StudyOM, title={Study on modes of occurrence and selective leaching of lithium in coal gangue via grinding-thermal activation}, author={Hangchao Chen and …
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Maria et al. [17] proposed a new method for quantitative analysis of volcanic particle shape based on fractal geometry. To reveal the complexity and variability of volcanic particle morphology, Yuan et al. [18] calculated the ... designed grinding medium and gangue of the corresponding quality using an electronic bal-
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Mechanically modification by grinding is an effective activation method to improve alumina recovery from coal gangue. The effect of grinding on coal gangue, however, had not been investigated ...
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