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coal gangue chemical properties

Physical and chemical properties and distribution ...

2014-3-1  The substrate made of coal gangue has more inferior physical-chemical properties. Considering the indicators, the conclusion is that several indicators of B test plot are better than the others, so a soil depth of 70-80 cm is a more economical and rational top-soil depth for reclaimed land when using coal gangue as a filler.

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Trace Elements in Coal Gangue: A Review IntechOpen

2017-12-20  The result showed that the chemical properties of trace elements in the coal gangue are mainly as silicate-bound, sulfide-bound and carbonate-bound form. The positive correlation of the trace element concentration with ash yield or iron-sulfur material indicated that the trace elements of As, Co, Cu, Ni, Se, and Zn in coal gangue are basically bounded with sulfide

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The structural and surface properties of natural and ...

2017-4-1  The natural coal gangue has a gray tint, is fissile and laminated with organic substance (coal). The chemical composition (see Table 1) reflects the mineral composition of the coal gangue. The relatively high content of SiO 2, Al 2 O 3 and Na 2O indicates the presence of

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Utilization of coal gangue as coarse aggregates in ...

2021-1-25  Physical properties of coarse aggregate. The chemical composition of coal gangue varies from the origin. Table 2 lists the chemical composition of the coarse aggregates in the test. The major constituents of the coal gangue are SiO 2 and Al 2 O 3.

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Enhanced mechanical properties and durability of coal ...

2019-9-10  The different coal gangue has different SiO 2 and AlO 2 proportions, with around 9% differences, which were similar to the previous results (Chen et al., 2008, Li et al., 2006). The coal gangue D has the lowest Al 2 O 3 content and the highest metal oxide contents (Na 2 O eq and MgO). These could be due to the severe weathering and erosion from the natural environment, which thus

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Mechanical properties and microstructures of

2019-10-10  Calcined coal gangue is obtained by artificially calcining of coal gangue. The content of SiO 2, Al 2 O 3 and CaO in calcined coal gangue of this experiment is 75.40%, 16.05%, and 0.39% respectively. Since the content of CaO is less than 10%, this calcined coal gangue powder also belongs to superfine powder.

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Effects of the variety and content of coal gangue

2019-9-30  Therefore, scientific analyses of the basic properties of coal gangue (such as water absorption, firmness, crushing value, etc.) are necessary to ensure that coal gangue aggregate concrete meets all structural safety requirements at normal temperatures and can be used normally under high- and low-temperature conditions.

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Analysis of differences in chemical properties of ...

2021-6-30  The results showed that in the treatment group where the topsoil substitute material was coal gangue, when the coal gangue content was 30%, 40%, and 50%, the pH values of reconstructed soil were lower than that of the control scheme. When the coal gangue

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Study on Properties of Coal Gangue Derived SiO Aerogel

Company. Raw coal gangue was provided from Jintan Coal Mining Ltd, Changzhou, China, which was crushed by hammer crusher and sieved below 0.3mm for accelerating reaction between coal gangue and reaction liquid. Hydrochloric acid was obtained by Cancheng Chemical Ltd, China, which was used to remove impurity metal ions in gangue.

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Effect of coal gangue/carbon black/multiwall carbon ...

Effect of coal gangue/carbon black/multiwall carbon nanotubes hybrid fillers on the properties of natural rubber composites Shuping Chen Chemistry and Chemical Engineering School, Institute of Physical Chemistry, Lingnan Normal University, Zhanjiang, Guang Dong, People's Republic of China

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and Technology (Beijing), Beijing 100083, P.R. China Xiao ...

2021-4-27  2.1. Coal gangue Coal gangue is a typical solid waste produced during coal mining and preparation. The chemical compositions of coal gangue mainly include SiO2, Al2O3, Fe2O3, Na2O, CaO, MgO, TiO2, K2O and organic components (Table 1). The main mineral compositions of coal gangue include quartz, kaolinite, and other clay minerals [25].

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Use of Coal Gangue to Prepare Refractory Saggars

2021-1-11  Mullite (3Al2O32SiO2) is commonly used as the basic component to prepare refractory saggars for the calcination of Li-ion battery (LIB) cathode materials. Coal gangue, basically treated as aluminosilicate solid waste/tailings, could be used as the starting material to synthesize mullite at elevated temperatures. However, high operation energy and additional high-quality alumina sources

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Enrichment of heavy metals in coal gangue by puff balls ...

2014-10-27  Coal gangue is the solid waste in coal production and preparation. The coal gangue yield is 10%–30% of the raw coal. According to incomplete statistics, the ... physical and chemical properties of the matrix and increase its pH value, which makes plant growth at

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EFFECTS OF COAL GANGUE ON THE SULFATE ATTACK

2021-6-8  Eects of coal gangue on the sulfate attack resistance of cement-based materials Ceramics – Silikáty 65 (2) 148-157 (2021) 149 reactivity of coal gangue after calcination. Research by Song et al [19] showed that calcined coal gangue at 700 °C has an improved activity. It was also shown in [20] that the activity of coal gangue could be enhanced

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THE THERMAL TRANSMISSION BEHAVIOR ANALYSIS OF

2018-4-24  physical and chemical properties of coal gangue and provides some information about the ther-mal evolution of coal gangue because several physico-chemical properties of coal gangue, such as particle size, surface area, and mineralogy are significantly affected by thermal treatment [23].

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Study of Mechanical Properties and Durability of Alkali ...

Despite a discussion about the chemical composition of coal gangue has been provided, discussion about the physical properties of the material was missed. I suggest to compare the physical properties of coal gangue with a similar porous aggregates such as bottom ash and scoria. Some references are

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Study of Mechanical Properties and Durability of Alkali ...

Coal gangue, which has a similar composition to clay [], is a solid waste produced during coal mining and processing [6,7,8,9,10], and its annual production accounts for about 10% to 15% of the coal output in that year [6,7,11].Fresh undisturbed coal gangue does not have pozzolanic activity [], which in general leads to the low strength of coal gangue aggregate concrete and severely limits its ...

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Coal Gangue and its Application Research in Building ...

The current statistics show coal gangue discharge is 100 million tons per year, and the accumulated discharge has been as high as 4.5 billion tons. It comprises the largest portion of solid waste in our country. Its storage not only requires valuable land resources, but also pollutes the air, water and soil of the storage sites, resulting in waste of resources.

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EFFECTS OF COAL GANGUE ON THE SULFATE ATTACK

2021-6-8  Eects of coal gangue on the sulfate attack resistance of cement-based materials Ceramics – Silikáty 65 (2) 148-157 (2021) 149 reactivity of coal gangue after calcination. Research by Song et al [19] showed that calcined coal gangue at 700 °C has an improved activity. It was also shown in [20] that the activity of coal gangue could be enhanced

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Effects of chemistry and mineral on structural

2014-6-10  The utilization of coal gangue is usually subjected to calcination to achieve high chemical reactivity and exclude carbon. The correlation between the composition and properties of coal gangue during calcination is essential for its applications. In this paper, the effect of chemistry and minerals of coal gangues on the thermal behavior, structural evolution and chemical states of silicon and ...

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Influence of coal gangue aided phytostabilization on

2020-1-21  Coal gangue was sampled from a coal waste dump in Huainan coalfield (Anhui, China) (32°49′07.0″N, 116°34′23.5″E). The coal gangue and tailings were air dried, sieved through a 2 mm mesh sieve and homogenized before use. The physico-chemical properties of the coal gangue and tailings are presented in Table 1.

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Study of Mechanical Properties and Durability of Alkali ...

Despite a discussion about the chemical composition of coal gangue has been provided, discussion about the physical properties of the material was missed. I suggest to compare the physical properties of coal gangue with a similar porous aggregates such as bottom ash and scoria. Some references are

More

Effect of coal gangue/carbon black/multiwall carbon ...

Effect of coal gangue/carbon black/multiwall carbon nanotubes hybrid fillers on the properties of natural rubber composites Shuping Chen Chemistry and Chemical Engineering School, Institute of Physical Chemistry, Lingnan Normal University, Zhanjiang, Guang Dong, People's Republic of China

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Reclaiming Subsidized Land: An Evaluation of Coal

2020-1-20  L. Xu, C. Huang, R. Zhang et al., “Physical and chemical properties and distribution characteristics of heavy metals in reclaimed land filled with coal gangue,” Transactions of the Chinese Society of Agricultural Engineering, vol. 30, pp. 211–219, 2014. View at: Google Scholar

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Study of Mechanical Properties and Durability of Alkali ...

Coal gangue, which has a similar composition to clay [], is a solid waste produced during coal mining and processing [6,7,8,9,10], and its annual production accounts for about 10% to 15% of the coal output in that year [6,7,11].Fresh undisturbed coal gangue does not have pozzolanic activity [], which in general leads to the low strength of coal gangue aggregate concrete and severely limits its ...

More

Enrichment of heavy metals in coal gangue by puff balls ...

2014-10-27  Coal gangue is the solid waste in coal production and preparation. The coal gangue yield is 10%–30% of the raw coal. According to incomplete statistics, the ... physical and chemical properties of the matrix and increase its pH value, which makes plant growth at

More

Use of Coal Gangue to Prepare Refractory Saggars

2021-1-11  Mullite (3Al2O32SiO2) is commonly used as the basic component to prepare refractory saggars for the calcination of Li-ion battery (LIB) cathode materials. Coal gangue, basically treated as aluminosilicate solid waste/tailings, could be used as the starting material to synthesize mullite at elevated temperatures. However, high operation energy and additional high-quality alumina sources

More

Factors Affecting Brittleness Behavior of Coal-Gangue ...

2020-9-28  Coal gangue, which is the solid waste produced during the coal processing, causes serious environmental problems. Lightweight concrete by making use of the coal-gangue ceramsite as the aggregate has many advantages as the construction material. However, the high brittleness of lightweight aggregate concrete is one of the problems for its application in building infrastructure.

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