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Microstructure of Coal Gangue and Precipitation of Heavy …

In the composition of coal gangue, SiO 2 is the main component, followed by Al 2 O 3. The content of SiO 2, Al 2 O 3, and S in the weathered coal gangue was …

Analysis of thermal activation and phase transformation of coal-gangue

The changing rule of mineral composition and dissolution of active ingredients of thermal activated coal-gangue was studied under different temperatures.

Recycling of Moroccan coal gangue in the elaboration …

The composition of the coal gangue varies with the geology of the site. For example, one could compare the compositions (of studied samples) in Morocco to those of other countries like Spain [17 ...

Environmental hazards and comprehensive utilization of solid waste coal

The mineral content of high alumina gangue clay is very high, and its main mineral composition is kaolinite. Kaolinite is a 1:1 type dioctahedral layered silicate mineral belonging to the triclinic crystal system, whose crystal structure (Fig. 1 a and 1b) consists of structural layers formed by joining of silica-oxygen tetrahedra and alumina-oxygen …

Comprehensive utilization and environmental risks of coal …

The mineral composition of coal gangue mainly includes quartz, clay minerals and carbonaceous materials, among which clay minerals account for 50%–70%, quartz accounts for 20%–30%, and other minerals and carbon impurities …

The Current Situation Research on Comprehensive Utilization of Coal Gangue

This paper summarizes the utilization of coal gangue in the preparation of chemical products such as alumina, aluminum chloride and polyaluminum chloride; New materials such as bricks, cement raw materials, ceramic materials, molecular sieves, ultra-fine kaolin, etc., can also be used for comprehensive utilization of roads, reclaimed fields ...

Study on the macro–micro evolution of compaction

Tests on the basic properties of gangue materials. As shown in Fig. 2, the composition of gangue was analysed by RXD spectroscopy in this experiment.The experimental results show that the main ...

Migration transformation, prevention, and control of typical …

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 …

Pyrolysis and Combustion Behavior of Coal Gangue in …

Combustion of coal gangue is extensively used for power generation in China. In this paper, pyrolysis and combustion characteristics of a low-rank coal gangue have been investigated under oxy-fuel (O2/CO2) and air (N2/O2) conditions using a drop tube furnace and thermogravimetric analysis. Pyrolysis experiments were carried out in …

Chemical composition of Coal Gangue 1-4 (%).

By comparing Table 1 and Table 4, the main chemical composition changes of Coal Gangue 1-4 before and after repairing AMD are as follows. Among them, the content of Fe, Mn and S of Coal Gangue 1 ...

Release Characteristics of Harmful Trace Elements during …

Therefore, the study of coal gangue mineral composition, chemical composition, modes of occurrence, and release characteristics of harmful trace elements under different experimental conditions provides the necessary theoretical foundation for preventing and controlling environmental pollution and for the comprehensive utilization of coal ...

Changes in Minerial Composition and Structure of Coal Gangue …

The changes in composition and structure of coal gangue during heat and mechanical activation were investigated by means of XRD, IR and nuclear magnetic resonance (NMR). The results show that during calcining process of coal gangue, coal in the coal gangue burned, kaolinite gradually transformed into metakaolin when calcining temperature …

A novel utilization of high-Fe bauxite through co …

mineral types in the coal gangue, XRD analysis was used. As shown in Figure 1, quartz, kaolinite, and albite are the main mineral components in the coal gangue. Table 1 Chemical composition of in coal waste wt% Table 2 Coal proximate analysis of …

Comprehensive utilization and environmental risks of coal …

Its chemical composition mainly includes SiO 2, C, Al 2 O 3 Fe 2 O 3, CaO, MgO, K 2 O and Na. Comprehensive utilization of coal gangue. Along with strict …

Chemical composition (wt.%) of coal gangue

The chemical composition of coal gangue obtained by X-ray uorescence analysis with an Axios apparatus is shown in Table 1. (1.08%), and SO 3 (1.05%). ... View in full-text.

The Sustainable Utilization of Coal Gangue in Geotechnical …

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 …

Representative coal gangue in China: Physical and chemical …

Based on the source and distribution of coal gangue (CG) in China, this study introduces the current situation of CG storage in China and the problems existing in the process of CG utilization. For the benefit of solve the difficulty of CG utilization and the risk control of heavy metals (HMs), representative CG samples were selected, and the chemical …

Characterization studies on coal gangue for sustainable …

The chemical composition of coal gangue is almost close to natural soils except for alumina phase. These phases can be of immense importance when the …

Research Article Effects of Fine Gangue on Strength, …

e major chemical components of coal gangue are silica (SiO 2)andalumina(Al2 O 3), whereas the mineral components are quartz and feldspar [ ]. In, ... (XRD) pattern of the mineral composition of the coal gangue samples was collected with a Bruker AXS D Advance di ractometer using Cu K radiation (Figure (a) ).A ermoFisherScienti c ermoiCAP

Study on Hydration and Hardening Performance of Coal …

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 ... The chemical composition of CG, which contained a high SiO: 2: content and a low CaO content, resulted in poor volume stability (Li et al., 2022). Calcined CG could ...

Preparation of coal gangue concrete modified by …

In the test, coal gangue was produced by Henan Jinyuan Environmental Protection Technology Co., LTD. After mechanical grinding, the particle diameter of the coal gangue is 45 μ m (325 mesh), as shown in Fig. 1. Its chemical composition is presented in Table 3. Download: Download high-res image (37KB) Download: Download full-size image; …

Chemical composition of calcined coal gangue.

Download scientific diagram | Chemical composition of calcined coal gangue. from publication: Optimized Preparation of Porous Coal Gangue-Based Geopolymer and Quantitative Analysis of Pore ...

Research on Potential Fertilization of Coal Gangue in the …

Abstract: Based on the systematic analysis of the coal gangue in Weibei Coalfield, such as petrologic characteristics, chemical composition, nutrient elements, deleterious elements, and the transformation, and compared with the soil element content background values of Loess Plateau and national harmful materials controlling …

Environmental hazards and comprehensive utilization of …

Abstract. Coal mining and washing is accompanied by the production of large amounts of coal gangue, which exerts a notable influence on the natural environment. …

Early-age characteristics of red mud-coal gangue …

This experimental research was to investigate the possibility of incorporating red mud and coal gangue as raw materials for the production of red mud-coal gangue cementitious material, abbreviated as RGC, including analyses of its chemical composition, physical properties, mechanical properties and …

Chemical inertness conversion of carbon fraction in coal gangue …

Semantic Scholar extracted view of "Chemical inertness conversion of carbon fraction in coal gangue via N-doping for efficient benzo(a)pyrene degradation." by Chao Liang et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 220,875,046 papers from all fields of science ...

Activation Mechanism of Coal Gangue and Its Impact on the …

Chemical Composition and Reaction Mechanism of Geopolymers. ... Liu L.L., Wang X.D., Zhang Z.T. Effects of chemistry and mineral on structural evolution and chemical reactivity of coal gangue during calcination: Towards efficient utilization. Mater. Struct. 2015; 48:2279–2793. doi: 10.1617/s11527-014-0353-0. [Google Scholar]

The evolution of coal gangue (CG)–calcium hydroxide …

Table 2 Chemical composition of activated coal gangue/% Composition CaO SiO 2 Al 2O 3 Fe 2O 3 SO 3 MgO K 2O TiO 2 Na 2O Content/% 15.0 56.2 17.8 4.09 0.424 1.28 1.98 0.715 0.472

Chemical composition of coal gangue (mass %). VM

Download Table | Chemical composition of coal gangue (mass %). VM: Volatile matter; LOI: Loss on ignition. from publication: Investigation on Calcination Behaviors of Coal Gangue by Fluidized ...

Microstructure of Coal Gangue and Precipitation of Heavy …

In the composition of coal gangue, SiO 2 is the main component, followed by Al 2 O 3. The content of SiO 2, Al 2 O 3, and S in the weathered coal gangue was lower than that in the fresh coal gangue, while the content of P was slightly higher. Chemical elements contain a small amount of Mn, Cu, Zn, Ti, Ba, Cl, and other elements, among …