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Although the calcination-based activation of coal gangue is important for its valorization in the form of cementitious materials, the related works mainly focus on high-quality coal gangue, neglecting its low-quality counterpart. To bridge this gap, we herein conducted the pilot-scale suspension calcination of low-quality coal gangue; explored …
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The Fifth Prospecting Team of Shandong Coal Geology Bureau, Jinan, 250100, China: Keywords: Coal Gangue Recycling, Porous Ceramics Fabrication, Sintering Temperature Optimization, ... which includes calcination, grinding, and sintering at varying temperatures with the incorporation of chemical additives. The findings reveal that a sintering ...
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The treatment and utilization of coal gangue, one of the main solid wastes produced during coal mining, are of great significance in environmental protection and resource development. In the contemporary context of the carbon neutralization strategy, due to the property of the carbon in coal gangue, it is necessary to be cautious of the …
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CHARACTERISATION OF COAL GANGUE AND FABRICATION ... HAO FU, #WENCHAO WANG The Fifth Prospecting Team of Shandong Coal Geology Bureau, Jinan, 250100, China #E-mail: dizhishiyan215@163 Submitted November 30, 2023; accepted January 26, 2024 ... grinding, moulding and sintering of the coal gangue under different …
When it comes to grinding media ball, most people often think about grinding steel ball. ... they are ground down in to release valuable metals from the gangue materials proceeding to concentration process. ... Factory Site: Taitou Industrial Park, Guanzhuang Town, Zhangqiu District, Jinan City, Shandong Province, China +86 531 …
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coal-gangue-based silicon fertilizer, and its reliability veri-ed, thereby providing a theoretical basis for use of coal-gangue-based silicon fertilizer in agriculture. Materials and methods Materials Coal gangue The coal gangue used in the experiment comes from the Shendong mining area in Inner Mongolia, China, with an ash content of~ 85.60%.
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In preparing geopolymer based on red mud (RM), preactivation processes that are generally energy-intensive are employed, including two indispensable steps, namely, calcination and fine grinding. A novel co-grinding preactivation method without calcination was proposed in this study. RM was pretreated by mix grinding with blended …
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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% …
DOI: 10.1016/J.CONBUILDMAT.2017.07.045 Corpus ID: 136333916; Comparison of red mud and coal gangue blended geopolymers synthesized through thermal activation and mechanical grinding preactivation
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Sample Concentration at the Sampling Point. As can be seen from Table 2, one section of grinding ball mill, that is, the moisture of the crushing final product is about 6%; the discharge concentration of 1# ball mill is 71.2%, in the normal range; the discharge concentration of 2# ball mill is 68.5%; and the discharge concentration of 3# ball mill is …
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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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Upon grinding and calcination, the reactivity of coal gangue is found to be on par with the traditional precursors such as fly ash and ground granulated blast furnace slag. This indicates the possibility of coal gangue-based geopolymers in replacing traditional binders for various applications such as bricks, tiles, precast concrete …
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 pattern of PSD and the variation trend of characteristic parameters of gangue under different ball-to-gangue ratios and grinding times were …