— The mechanical activation of coal gangue in this study was carried out using a ball mill, and the mass ratio of steel balls to coal gangue was 5:1. After ball milling, the coal gangue powder passing through the …
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— Coal gangue (CG), which accounts for about 10–20 % of coal output, is a kind of solid waste generated during the coal mining and washing processes. According to Fig. 2, the annual output of CG in China fluctuates between 600–800 million tons, with a utilization rate hovering around 70 %.
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— Glass–ceramic s were fabricated at a relatively low temperature by incorporating coal gangue, waste quartz sand and sintering additives in different proportions. Sintering and the ing behavior of the s were studied using thermal, X-ray techniques and morphological characterization, followed with physical and …
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— The crushed coal gangue and calcium oxide were milled for 1 h in a super-spherical mill at a ratio of 10:1 to prepare the activated coal gangue (CG). The coal gangue was mixed with sodium hydroxide (CG:NaOH = 1:4) and reacted at 160 °C for 40 min in a microwave reactor to obtain a mixed solution comprised of active silicoaluminate.
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What can coal gangue powder be used for? Coal gangue can be ground into powder to replace fuel: iron chemistry; boiler burning; lime burning; coal recovery. Production of …
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— Coal gangue is a fixed coal mining, washing, and processing product. It is a black-gray rock with lower carbon content and harder than coal associated with coal …
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— The coal gangue powder and aggregate were calcined with constant temperature in muffle furnace 700 °C for 2 h. Fig. 2 shows the particle size distribution of calcined coal gangue powder and slag powder. The median particle size d50 values of calcined coal gangue powder and slag powder were 17.252 μm and 10.529 μm, …
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— The characteristics of raw materials used in the test, such as cement, CGP and coal gangue, are shown in Table 1.In this experiment, the coal gangue produced by Zhang Jiamao coal mine in Shenmu City, Shaanxi Province is selected, and the XRD-7000L X-ray diffractometer was used to obtain the mineral composition analysis of coal …
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— CG was provided by a coal mine in Shanxi Province, China. The chemical composition of CG is listed in Table 1 according to XRF test, which were mainly composed of SiO 2, Al 2 O 3, and other components.As show in Fig. 1, the CG blocks were initially crushed using a horizontal ball mill and then ground by a ball until milled powder passed …
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