The chemical composition of coal gangue powder and cement after microwave is shown in Table 1, and the particle size distribution is shown in Table 2. 2.2 Specimen Preparation: Coal gangue admixture concrete specimens with design strength of C35 were prepared according to JGJ/T 55-2011 (2011). The
In this paper, coal gangue powder (CGP) was used to replace 30% of the cement weight. The dosage of steel slag powder (SSP) was 5%, 10%, 15%, 20%, and 25% of the coal gangue weight. The CGP-SSP-cement mortars and pastes were prepared. The compressive and flexural strengths, hydration heat, X-ray diffraction (XRD), …
The composition information of coal gangue is the basis of reasonable utilization of coal gangue, and according to the composition information of coal gangue, one can choose the appropriate ...
In summary, this paper studies the stress and strain of coal gangue in the compression process through the confined compression test of coal gangue with …
Coal gangue is the main solid waste in coal mining areas, and its annual emissions account for about 10% of coal production. The composition information of coal gangue is the basis of reasonable utilization of coal gangue, and according to the composition information of coal gangue, one can choose the appropriate application …
The coal gangue activity primarily arises from the conversion of well-crystallized kaolinite into disordered metakaolin [117, 118]. Through the utilization of microwave activation, Guan modified the mineral composition of coal gangue powder, effectively isolating the active compounds and enhancing the roundness and fineness of …
Coal gangue (CG) is a typical industrial solid waste product, ... Table 2 displays the composition of CG, CS, and PS obtained based on X-ray fluorescence (XRF) spectroscopy. The pyrolysis of biomass and coal may be catalyzed by iron, potassium, and calcium, which can then contribute to the synergistic effect of coal and biomass. ...
The mineral composition of coal gangue from different mining areas, formed in different sedimentary environments, determined its chemical elemental concentration characteristics. The Nanyangpo samples exhibited high SiO 2 (53–68%) and low Fe 2 O 3 contents (0.61–2.25%), which attributed to the enrichment of quartz and …
Abstract. Coal gangue spontaneous combustion has caused serious environmental and ecological problems.
As depicted in Fig. 2, among the 90 working faces surveyed, mudstone is the most prevalent roof rock type, representing 58.5% of the total statistical data, followed by sandstone at 30.9%, while ...
The microstructure and mineral composition of the gangue play a decisive role in the precipitation of heavy metal elements. In this study, the microstructure, mineral composition, and ...
In this study, the chemical and mineralogical composition of coal gangue from the Jungar coalfield was analyzed and activated thermally under different conditions. The optimal calcination conditions to activate coal gangue as SCM were determined. The relationship between the phase and structural evolution and the pozzolanic activity of …
The coal gangue used in this study was obtained from Shuozhou, Shanxi province, China. The chemical composition of the raw coal gangue as well as the residue ash were quantified by an inductively coupled plasma optical emission spectrometer (ICP-OES, Pekin-Elmer, Optima 5300DV) and X-ray fluorescence spectrometry (XRF, …
Coal gangue (CG) is a type of industrial solid waste produced by the process of coal excavation and separation 1,2,3. Generally, one ton of CG is discarded for every 10 tons of produced coal 4, 5 .
Abstract. Among coal mining-related wastes, coal gangue (CG) is the heterogeneous waste generated during the mineral processing or coal washing phase …
The transformation behavior of mineral and trace elements during combustion of Chinese coal gangue at varies temperatures were studied. The coal gangue sample was placed at muffle roaster and heated up to 8-desired temperature points, from 500 °C to 1200 °C with 100 °C for each interval.The mineral compositions …
With the continual advancement of coal resource development, the comprehensive utilization of coal gangue as a by-product encounters certain constraints. A substantial amount of untreated coal gangue is openly stored, particularly acidic gangue exposed to rainfall. The leaching effect of acidic solutions, containing heavy metal ions …
Table 2 shows that in the material composition of coal gangue, SiO 2 is the main component with high content, accounting for 59.9% and 53.7% of the fresh and weathered
Coal gangue power generation Coal gangue grinding adopts fluidized bed technology. When the carbon content is greater than 20%, it can be used as energy and can be used to generate electricity. …
Main chemical components of calcined coal gangue was analyzed by X-ray fluorescence spectroscopy (XRF), as shown in Table 1.The mineral components of original coal gangue and coal gangue calcined at 700 °C by X-ray diffraction (XRD) and demonstrated the results in Fig. 2.The main mineral components of coal gangue …
Coal gangue is one of China's main industrial solid wastes, which contains various harmful heavy metal elements, such as lead (Pb). The long-term accumulation of coal gangue causes Pb to migrate to the surrounding environment due to weathering and rain erosion, eventually endangering human life and health with its continuous …
Coal gangue occupies large swathes of land resources, resulting in ecological fragility and various environmental problems. ... influence the microbial community composition and function 17,18 ...
The transformation behavior of mineral and trace elements during combustion of Chinese coal gangue at varies temperatures were studied. The coal gangue sample was placed at muffle roaster and ...
Coal gangue: The coal gangue (CG) used in this study is untreated raw coal gangue, sourced from Lingshou County, Hebei Province, China. Its appearance mostly presents as flakes or blocks of black-gray rocks, and the shape and size of CG vary. The main chemical components of the CG are shown in Table 1, measured by X-ray …
Quantitative analysis of the whole rock minerals of coal gangue was conducted using a Nippon Nikkei ultima 4 X-ray diffractometer, and the test results are shown in Fig. 3.According to the ...
The chemical composition of coal gangue sourced from different publications is tabulated in Table 1. According to ASTM C618 [28], coal gangue is regarded as a pozzolanic material since the percentage of SiO 2 + Al 2 O 3 + Fe 2 O 3 is more than 70%.
In addition to quartz, the diffraction peaks of Al 2 SiO 5, CaSO 4 and Fe 2 O 3 also exist in CG, so the main mineral composition of coal gangue also includes kaolinite and pyrite. The large amount of anorthite is also one of the reasons why coal gangue is …
Coal gangue is the main solid waste in coal mining areas, and its annual emissions account for about 10% of coal production. The composition information of coal gangue is the basis of reasonable …
DOI: 10.1016/J.FUEL.2012.02.027 Corpus ID: 93714613; Transformation behavior of mineral composition and trace elements during coal gangue combustion @article{Zhou2012TransformationBO, title={Transformation behavior of mineral composition and trace elements during coal gangue combustion}, author={Chuncai …
2.1. The mineral and chemical composition of coal gangue. Generally, the main mineral phases of coal gangue are kaolinite, quartz, pyrite, illite, calcite, ankerite, and montmorillonite [36, 37].The coal gangue samples are usually dominated by silicon dioxide and aluminum oxide, followed by ferric oxide and potassium oxide accompanied with …
The action mechanism, advantages and disadvantages and application scope of various ecological restoration technologies involved in the two modes are …
Abstract Among coal mining-related wastes, coal gangue (CG) is the heterogeneous waste generated during the mineral processing or coal washing phase of coal mining. A thorough understanding of environmental concerns associated with the current model of ...
1. Introduction. Coal plays a crucial role as a mineral resource worldwide. However, approximately 10 %–15 % of mined coal remains as commercially worthless coal gangue after the mining and purification process is completed (Li and Wang, 2019).The utilization of coal gangue inevitably leads to secondary environmental pollution through …
Coal gangue is the main solid waste in coal mining areas, and its annual emissions account for about 10% of coal production. The composition information of coal gangue is the basis of reasonable ...
Table 2 shows that in the material composition of coal gangue, SiO 2 is the main component with high content, accounting for 59.9% and 53.7% of the fresh and …
