— In this paper, the fractal characteristics of the coal particle size distribution are expected to be taken as the starting point to establish the ultrafine grinding model of coal particles and deduce the expression of the micro-energy consumption law on the basis of considering the agglomeration phenomenon and the change in morphology of ...
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WhatsApp: +86 18221755073— The coal gangue was dried, and then 500 g of the coal gangue was ground using a GJ-1000B type grinding machine for 4 min. ②. The ground powder was placed into a grinding tank with a GMB/B ball mill at a 3:1 ratio of materials and steel balls. The lid of the tank was sealed, and the grinding tank was placed on the corresponding rubber shaft.
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WhatsApp: +86 18221755073— IR spectra of ground coal gangue that had not undergone calcination (Fig. 8 (a)) revealed that grinding had significant effects on the changes in the micro structure of coal gangue. After 2 h grinding, a series of absorption peaks at 3600–3700 cm − 1 in the high frequency region and those at 400–1100 cm − 1 in the low frequency region ...
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WhatsApp: +86 18221755073— Based on the particle size distribution and surface physicochemical characteristics of coal particles, a micro-energy consumption model of coal particles in …
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WhatsApp: +86 18221755073— Based on the particle size distribution and surface physicochemical characteristics of coal particles, a micro-energy consumption model of coal particles in the ultrafine grinding process was proposed. This model explained the microscopic mechanical behavior of the ultrafine grinding process by defining factors such as agglomeration …
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WhatsApp: +86 18221755073— Based on the morphological characteristics of particles and the variation law of fractal dimension of particle size distribution in the process of ultrafine grinding, a …
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WhatsApp: +86 18221755073— This study explores the potential of municipal solid waste incineration bottom ash (MSWI BA) and coal gangue as precursors for alkali-activated cementitious materials (CG-MBA). An examination of the impact of MSWI BA content, NaOH/Na2SiO3 ratio, liquid–solid ratio, and NaOH concentration on strength and reaction through the …
WhatsApp: +86 18221755073— The appearances and particle size distribution of slag micro-powder produced by ball mill and vertical mill were researched ... kinetic equation of coal characterized by particle size. Zeng Fan. Materials Science. 2000; The particle size distribution of coal has self similarity during the grinding process and can be fit by the …
WhatsApp: +86 18221755073— The high voltage pulse pretreatment inhibitory effect can effectively reduce the micro-fine particle contents of mechanical grinding while the contents of proper size fraction can be guaranteed. The inhibitory index is 0.24 and −74 μm contents for treated samples is 52.14% compared with untreated samples (45.44%) under 10 s mechanical grinding.
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