Study of Mechanical Properties and Durability of Alkali-Activated Coal Gangue-Slag Concrete. ... In the production process of coal gangue aggregate, the coal gangue was crushed by a jaw crusher, ground by a small ball mill and calcined in a muffle furnace at 700 °C for 2 h ...
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The coal gangue was first treated via a self-heating sintering decarbonization process, which effectively increased its reactivity without the need for additional solid fuel. Following thermal activation, chemical activation was performed using activators such as hydrated lime and lithium silicate to further improve the reactivity of the ...
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Investigation on activation technology of self-heating decarbonization of coal gangue by a sintering process
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Moreover, the gangue sand was used to prepare the desulfurized coal gangue mortar (DCGM) and the relevant mechanical properties and influence mechanisms were discussed. The results of total sulfur and XRD analysis show that Sporosarcina Pasteurii can accelerate the desulfurization in the 7-days-spraying modification.
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from gangue, it is also the process that is essential for efficient separation of the minerals, and it is often said to be the key to sound mineral processing" Wills, B. and Napier?Munn T. (2006 a)
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The world is endowed with huge coal resources, which are unevenly distributed in a few nations as manifested in Fig. 3.According to available data, the total proven coal reserves in the world were reported to be 1074.108 billion tonnes in 2020, and about 23.18% of those are located in the United States, the most coal abundant nation on this planet.
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The coal gangue was first broken by a crusher, and then filtered by a classifying screen to obtain a group of samples with a particle size of 9.5–16 mm. The basic physical and mechanical parameters measured according to the test procedure and ISO/DIS 20290-1 as shown in Table 1. Based on the basic physical parameters of coal gangue, it is a ...
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Study on the mechanical behavior and micro-mechanism of concrete with coal gangue fine and coarse aggregate. ... As shown in Fig. 1(a), after being crushed by a jaw crusher and sieved through a vibrating screen, CGCAs with a continuous gradation of 4.75–20 mm and. ... failure modes and internal damage evolution process of the coal gangue ...
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This study focuses on enhancing the cementitious activity of coal gangue through a two-step process involving thermal activation followed by chemical alkali excitation. The coal …
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Intermediate crushers are the reduction gyratory, cone crusher, hammer mill, rolls. Fine crushers are rolls, hammer mills, short-head cones, fine-reduction gyratories, and stamps; certain grinding machines, e.g., the rod mill, may be used for fine crushing.
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Abstract: Coal gangue is a solid waste discharged in coal mining and dressing process. Large-scale decarbonization and Large-scale decarbonization and activation treatment are key steps …
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Mechanical properties of steel fiber-reinforced coal gangue concrete (SCGC) are tested, proving the effectiveness of strength enhancement of SCGC and helping to expand the application …
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also effectively reduces the carbon emissions of cement. However, high-quality coal gangue (Al 2 O 3 content above 30 %) accounts for only a small portion of the large total emissions of coal gangue, and its distribution is uneven in different regions. A large amount of low-quality coal gangue (with an activated Al 2 O 3 content less than 20 %) has low activity …
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XRD SEM-EDS mapping analysis and contact angle measurement revealed that the coal gangue flotation decarbonization process assisted by the regeneration composite …
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Coal gangue is a solid waste discharged in coal mining and dressing process. Large-scale decarbonization and activation treatment are key steps toward massive and efficient utilization of coal ... Structure and pozzolanic activity of calcined coal gangue during the process of mechanical activation. Wei Guo Dongxu Li Jianhua Chen Nanru Yang ...
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Prediction of metallurgical responses during the flotation process is extremely vital to increase the process efficiency using a proper modeling approach. In this study, two new variants of the recurrent neural network …
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Divalent cations also enhance slime coating on pentlandite, a process that has been exacerbated by processing plants recycling water enriched in dissolved ions in response to stringent environmental regulations and efforts to lower plant operating costs [10].The use of lime (CaO) during processing of massive sulfide ores introduces high concentrations of Ca 2+ into …
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Article on Investigation on activation technology of self-heating decarbonization of coal gangue by a sintering process, published in Journal of Central South University of Technology 30 on by Sheng-Hu Lu+6. Read the article Investigation on activation technology of self-heating decarbonization of coal gangue by a sintering process on R …
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The mechanical behavior of coal gangue concrete is reduced by increasing the coal gangue replacement ratio. A model is proposed for predicting the compressive strength of coal gangue concrete.
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In the production process of coal gangue aggregate, the coal gangue was crushed by a jaw crusher, ground by a small ball mill and calcined in a mu ffl e furnace at 700 C for 2 h (Figure 1 ).
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XRD SEM-EDS mapping analysis and contact angle measurement revealed that the coal gangue flotation decarbonization process assisted by the regeneration composite collector could effectively remove impurities and enrich the refined coal into the flotation concentrate. ... low−speed mechanical stirring was used for solution emulsification in ...
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Due to the main composition of CG are SiO 2, Al 2 O 3, etc., CG is often converted into a material with sustainable development through physical and chemical test methods.CG materials treated by physical and chemical methods are often used in road bases (Zhu et al., 2021), building materials (Wang et al., 2022a, Wang et al., 2022b; Zhang et al., 2022), and …
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The irregular shape of gangue blocks will affect the coordination structure between blocks in the crushed gangue accumulation body, and then affect the engineering mechanical properties of crushed ...
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1. Introduction. As the largest producer and consumer of coal resources in the world, China has numerous coal mines across the country, of which yielded a coal output of 4.07 billion tons in 2021 [].Meanwhile, an increasingly serious and urgent problem facing the coal production enterprises is associated with the large amount of coal gangue (CG) discharged …
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Crushing is the first mechanical stage in the process of comminution in which a principal objective is the liberation of the valuable minerals from the gangue. Crushing is typically a dry operation …
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Investigation of Hydraulic-Mechanical Properties of ... In the second stage, the product of the first stage was processed by the finer crusher. After crushing, the coal gangue was processed by a series of graded sieves to define the particle size distribution, as shown in Figure1. It can be seen that after the two-stage process, 80% of the ...
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The study incorporates an overview of the green hydrogen-production potential from wind energy in the USA, its application in power generation and the scope of substituting grey and blue hydrogen ...
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Coal gangue is a solid waste discharged in coal mining and dressing process. Large-scale decarbonization and activation treatment are key steps toward massive and …
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Crushers 6 INTRODUCTION. Crushing is the first mechanical stage in the process of comminution in which a principal objective is the libera- tion of the valuable minerals from the gangue. Crushing is typically a dry operation that is performed in two- or three-stages (i., primary, secondary, tertiary crushing).
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Coal gangue is waste rock obtained from coal mining and processing. China is a large coal resource country with a large quantity of coal gangue [1].On the one hand, according to Chinese statistics, 6–7 billion tons of coal gangue has accumulated over the years, with an increasing rate of 200 million tons per year, resulting in vast land occupation in mines, severe …
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Contribute to dihog/sbm development by creating an account on GitHub.
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Global steel production is a unique opportunity for far-reaching decarbonization initiatives (Lei et al. 2023).To turn iron into steel, three energy-intensive steps occur: (a) reducing iron oxide to metallic iron at a high temperature with chemical reductors (e.g., carbon, hydrogen and methane, pure or mixed); (b) melting the metallic iron at high temperature and removing …
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To support the decarbonization of the cement industry, coal gangue (CG) has potential as a supplementary cementitious material. The calcination process significantly …
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The present invention relates to a kind of utilization of coal gangue decarbonization process, belong to inorganic mineral resource recovery field, as follows by entire technological process：Then coal shale in brick making is promoted to feed bin by elevator, after preheating, into blanking device, subsequently into kiln, fires successfully, finally cool down and product is …
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Large-scale decarbonization and activation treatment are key steps toward massive and efficient utilization of coal gangue. In this paper, a new process for the …
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The coal gangue used in the experiment was taken from the Daliuta mining area in Ordos City. According to "Pebble and crushed stone for construction" (GB/T 14685–2022) [30], the raw coal gangue is purified by removing impurities, crushed into granules using a jaw crusher, and sieved through a vibrating screen to separate coal gangue particles into different sizes.
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