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Coal gangue is a complex industrial solid waste mixed with organic compounds, inorganic compounds and minerals (Fabiańska et al. 2013). Its major chemical compositions …
The chemical components of coal seams and coal gangue in different mining areas and different geological ages are quite different. In order to realize the harmlessness, resource treatment, and utilization of coal gangue in China, it is necessary to conduct in-depth research on the geochemical characteristics of pollution components such as ...
Representative coal gangue in China: Physical and chemical properties, heavy metal coupling mechanism and risk assessment. Author links open overlay panel Ding-yi Duan a, ... In addition to quartz, kaolinite and pyrite also exist in CG. Therefore, the essential components of CG samples are SiO 2, Al 2 O 3, Fe 2 O 3, CaO and other chemical ...
Gangue minerals, also called useless minerals, refer to the mineral associated with ore minerals that cannot be utilized temporarily, such as quartz, sericite, chlorite in copper …
The results of XRF showed that the main components of CG samples in these four regions were SiO 2, Al 2 O 3, Fe 2 O 3, CaO and other chemical components. The main …
This chapter discusses the methodology for characterisation and identification of the minerals defined and selected in Chap. 133 as common gangue minerals. As shown in the compilation presented (Table 134.1), the very low reflectance of most gangue minerals (either measured or reckoned by the Fresnel equation) distinguishes them clearly from the metallic ores.
Coal gangue has the dual attributes of hazard and resource. With the increasing awareness of resources conservation and ecological sustainability, the high-value utilization of coal gangue has attracted active attention. In this research, thermal activation followed by HNO 3 leaching were performed to extract valuable components from coal ...
This study examines the particle size and distribution of the main chemical components of gangue during the crushing process. Coal mine gangue was chosen as the research object, and its particle ...
However, the contents of gangue components (Si, Al, and P) in iron ore are increasing, and the iron ores procured are increasingly of low-grade, i.e., of low Fe content. In addition, it has become increasingly difficult in recent years to obtain high-grade iron ore, which has low gangue and high Fe contents, due to increased demand from the ...
For coal and gangue, intelligent sorting processes for separation, the use of coal and gangue mineral components with different fundamental differences, and the study of …
In the present the study, the hydrothermal removal of gangue components (Si, Al, and P) from iron ore as a means of producing high-grade iron ore from low-grade iron ore (limonite) is investigated.
Extraction of valuable components from coal gangue through thermal activation and HNO3 leaching J. Ind. Eng. Chem., 113 ( 2022 ), pp. 564 - 574 View PDF View article View in Scopus Google Scholar
In view of the analysis of coal gangue pyrolysis products, Liu [14] et al. analyzed the pyrolysis products of coal gangue at different pyrolysis temperatures, and concluded that the main components of pyrolysis gas are CO, H 2, NH 3 and other substances, and it is believed that the pyrolysis of coal gangue can be precisely controlled by ...
Key gangue minerals include quartz, iron carbonates (siderite and ankerite), and iron silicates (minnesotaite, greenalite, stilpnomelane, and cummingtonite) (Table 2.5).
For coal and gangue, intelligent sorting processes for separation, the use of coal and gangue mineral components with different fundamental differences, and the study of different properties of minerals and coal with different scales and density regarding the gray value change law are presented. The results show that the gray value of single minerals and mixed minerals …
The main gangue minerals in magnesite are quartz, dolomite, and calcite, while those in brucite are serpentine, dolomite, and calcite. ... the chemical-component distribution of flotation reagents and electrical properties of mineral surfaces are influenced by the slurry pH and the wettablity of mineral surfaces are affected by their surface ...
pollutant components in coal gangue under the inu-ence of atmospheric precipitation on the groundwa-ter system. In conjunction with soil column migra-tion experiments, the research aims to elucidate the multi-component transport mechanisms and laws governing the main pollutant components of gangue leachate in the groundwater system.
components of gangue will migrate along with the grain size after dynamic crushing and what migration rules are among the components are the preconditions for judging which resource utilization ...
Cu, Co, Zn, and Mn. The Si component of coal gangue is suitable for producing silicon fertilizer, while the presence of trace elements can promote crop growth and develop-ment [13], which can improve resource utilization and reduce the pollution of coal gangue. However, since the
Download scientific diagram | Main components of the coal gangue. from publication: Extraction of Aluminum and Iron Ions from Coal Gangue by Acid Leaching and Kinetic Analyses | Extracting ...
The main mineral components of the coal gangue shown in Fig. 3 are quartz, kaolinite, and muscovite, etc. Kaolinite is a 1:1 clay mineral composed of silica tetrahedral sheets and alumina octahedral sheets [35], which is the main component of coal gangue. Dehydration of kaolinite and formation of metakaolinite are the main reactions in the ...
... seen from Figure 2, the coal gangue is a multiphase mixture [29], and the main phases in the coal gangue are kaolinite, quartz, brookite, montmorillonite, pyrite, and siderite...
Coal gangue (CG) produced in coal mining and washing is one of the largest industrial solid wastes in China [1]. ... The fusible components including CaO, Fe 2 O 3, and MgO in the raw materials had various effects on the CRN reaction of mullite and micromorphology of the product. Although their additions to the raw materials led to the ...
PDF | On Jan 1, 2021, published Composition Analysis and Component Identification of a Kind of Coal Gangue | Find, read and cite all the research you need on ResearchGate
Coal gangue pollution components can be released into the soil surface water not only by direct weathering of the coal gangue, but also through the process of "coal-water" interaction, where pollutants are released into the external environment as leachate [29]. Consequently, these pollutants can reach the surrounding land and groundwater.
Kaolinite-type coal gangue is a solid waste from coal mining that contains valuable rare earth elements (REE) and kaolinite. The simultaneous recovery of REE and synthesis of functional materials utilizing kaolinite from coal gangue presents an opportunity for full utilization. This study introduces synchronous chlorination volatilization of REE and preparation of …
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 seams during …
Coal gangue mainly contains SiO 2 and Al 2 O 3 ; they account for approximately 50-80% of the coal gangue component [43], making it an appropriate raw material for the synthesis of ZSM-5 molecular ...
However, it is crucial to note that heavy metals and naturally occurring polycyclic aromatic hydrocarbons (PAHs) present in coal gangue are considered significant pollutants among its various components (Ahrens and Morrisey, 2005). Coal gangue ash contains small amounts of harmful trace elements, such as As and Cr.
Consequently, the source of strength of the composites in this study is mainly due to the physical and mechanical properties of each component of the raw materials, the friction coefficient between the fibers and the particles of the gangue-cured soil, the particle size of the coal gangue-cured soil, and the content of cohesive particles and ...
