How to Recycle and Process Coal Gangue: 7 …
The crushed gangue is ground into powder and sent to be refined into bricks. In addition to the above 7 uses, coal gangue can also been found the uses in porous ceramics, soil conditioners, water treatment adsorbents, and …
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In situ restoration of soil ecological function in a coal gangue
The soil ecological health risks and toxic effects of coal gangue accumulation were examined after 10 years of elm/poplar phytoremediation. The changes in soil enzyme activities, ionome metabolism, and microbial community structure were analyzed at shallow (5–15 cm), intermediate (25–35 cm), and deep (45–55 cm) soil depths.
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Comprehensive utilization and environmental risks of coal …
Coal gangue sand barrier plays a significant role in sandy soils improvement, and it promotes the great increase of soil organic matter, nutrient elements such as N, P, K, soil …
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Excess sulfur and Fe elements drive changes in soil and
The results suggested that coal gangue significantly influences soil S, pH and plant species after 8 years of natural recovery. The CK-far plots contained relatively low soil sulfur content,...
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Safe and environmentally friendly use of coal gangue in C30 …
In order to promote the development of coal gangue aggregate concrete and the resource utilization of coal gangue solid waste, the coal gangue samples were crushed into aggregates, and then the ...
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Research on the properties of creep compaction of crushed gangue …
In the caved zone, the creep compaction property test of crushed gangue merely takes into account the lithology of the gangue sample, taking into account the test's operability and convenience. Seven groups of crushed gangue samples from the caved zone are prepared for the experiment, using homogeneous mixing in a 1:1 ratio to create the mass ...
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CN116813423A
The invention relates to a gangue fertilizer for improving the nutrient content of soil and a preparation method thereof. Specifically, the method converts the coal gangue into the soil fertilizer containing multiple nutrient elements through the steps of crushing and screening, heating, drying, decarburization and the like. SiO in the chemical components of the coal …
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Optimizing the formulation of coal gangue planting …
In this study, we explored the effects of coal gangue planting substrate components (coal gangue, maize straw, fly ash, and water retention agent) on soil …
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Kazakhstan Coal Gangue Crusher
Roller crusher: Roller crusher is a type of secondary crusher that is used to crush coal gangue into very fine particles. Applications of Crushed Coal Gangue. Crushed coal gangue can be used for a variety of applications, including: Construction materials: Crushed coal gangue can be used as an aggregate in concrete and asphalt.
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Preparation of coal gangue-slag-fly ash geopolymer …
Coal gangue is a solid waste produced during coal production, and it accounts for 10%∼25% of the material produced in coal mining. China alone has accumulated more than 7 billion tons [5], [6], and accordingly, coal gangue is one of the mining solid wastes with the largest emissions in China.Geopolymers are enriched in silica-alumina (metakaolin) minerals or …
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Heavy metals in soil from gangue stacking areas increases …
We first determined total contents of the eight elements in gangue and soil samples around the coal gangue dumps with different accumulation characteristics, and the contents are presented in Fig. S2. ... Heavy metals are the main hazardous components of coal gangue, which can be discharged into the surrounding environment, ...
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Synergistic effects of phosphoric acid modified hydrochar …
The intensive land use has led to soil degradation and contamination, resulting in concerns about food security and environmental health. ... the coal gangue samples were crushed into aggregates, and then the macroscopic characteristics and microscopic structures of the aggregates were characterized through methods such as calcination, sulfuric ...
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Simultaneous nutrients activation and pollutants removal of coal gangue
Additionally, the leaching of heavy metals from CG will cause soil and water pollution, posing a significant environmental risk (Gao et al., 2021; Li and Wang, 2019). Therefore, the utilization of coal gangue as fertilizers necessitates prior modification to activate the nutrients, mitigate its pollution and environmentally hazardous effects.
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Optimizing the formulation of coal gangue planting …
Components of the planting substrate include coal gangue, sandy loam soil, fly ash, maize straw and water retention agents. The coal gangue was collected from Shangxinfang in the Mentougou District in Beijing. The particle size of the coal gangue was 1 cm–8 cm, and it was crushed to 50–100 mesh in the laboratory.
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Gangue mineral fertilizer and preparation method thereof
The invention discloses a coal gangue mineral fertilizer and a preparation method thereof. The fertilizer is prepared by using coal gangue as a raw material and processing the coal gangue by using Bacillus mobilis GZU-Bac 01. The Bacillus mobilis named as Bacillus mobilis GZU-Bac01(Bacillus mobilis GZU-Bac01), is preserved in China center for type culture collection …
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Selenium in Chinese coal gangue: Distribution, availability, …
In addition, crushed Se-enriched coal gangue powder is considered to be a potential resource for Se-enriched fertilizer, although As (avg = 90 mg/kg) and Cr (1.07 mg/kg) are enriched in early Carboniferous and late Triassic coal gangue. ... and some elements are emitted to the air as gas or dust, while others will infiltrate into the soil and ...
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Name already in use
Contribute to chengxinjia/sbm development by creating an account on GitHub.
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Prediction of compression and deformation behaviours of …
The basic principle is as follows: gangue that is separated and crushed on the surface or underground is transmitted to a goaf by using a gangue belt conveyor and a multi …
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Excess sulfur and Fe elements drive changes in soil and
The soil sulfur (S) was detected to be much higher in the soil of GP than CK-near and CK-far plots. CK-near soil contained 0.1 ± 0.06% sulfur, and GP had 1.0 ± 0.21%.
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Kinetics of alumina extraction from coal gangue by …
Such vast amounts of coal gangues have various impacts on soil, air, and groundwater [3,4]. Since the 1960s, coal gangue has been used in many countries for paving, power generation, brick making [5âˆ'7], and building materials [8âˆ'10]. ... Inner Mongolia Autonomous Region, China. 2.2 Methods The coal gangue was crushed into small ...
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Wrapped coal gangue aggregate enhancement ITZ and …
CM, CFM, and CSM test steps are as follows (Fig. 3).The CGA raw was soaked in water for 1 h (20 mm above the top of the aggregate), and then the cement, cement + 10% FA and cement + 10% SF were added into pre-wetted CGA raw to stir and shake until the surface of CGAraw was completely wrapped. After resting for 12 h, the covered CGAs was placed in the …
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Coal Gangue: Composition, Processing, Use And Recycling
These wastes usually include coal gangue (without valuable crushed coal and gangue), rocks, soil, and other minerals. ... 20%, coal can be recovered through coal preparation. This way, the GKLM vertical mill must be used to grind the coal gangue into coal gangue powder. Coal gangue grinding powder is used for building materials After the coal ...
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Characterizations of macroscopic deformation and particle …
The change rules of crushing ratio and newly added fine particle content with the cyclic loading times were similar. This is due to that the crushing forms of the gangue block in CGPM samples are mainly edges fracture and corners fracture. In this two crushing forms, gangue blocks in CGPM are mostly crushed into fine particles (0–10 mm).
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A concrete material with waste coal gangue and fly ash …
The coal gangue was not spontaneously combustible. Before use, coal gangue was crushed and washed to remove the dust. Next, after drying, they were sieved with a 30-mm sieve. ... These elements may be released from the leaching coal gangue into water and soil when coal gangue is used in the concrete, which may lead to potential environmental ...
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Cooperative effect of citric acid and pyrite on the slow …
The application of coal gangue as a soil amendment shows promise in increasing silicon availability, potentially serving as a silicon fertilizer in agriculture. However, the rapid release of silicon from coal gangue compared to the slow absorption by plants hinders its effective use. This study explored the formation of iron-containing secondary minerals on coal …
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WO2024164985A1
A method for enhancing weathering of coal gangue to form soil by using medium and low temperature waste heat. The method is implemented by means of the following steps: (1) hot water or water at a natural temperature is introduced into a coal gangue pile for leaching and the coal gangue pile is then baked with flue gas, coal gangue mineral particles undergo water …
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The influence of carbon imperfections on the …
In order to promote the development of coal gangue aggregate concrete and the resource utilization of coal gangue solid waste, the coal gangue samples were crushed into aggregates, and then the macroscopic characteristics and microscopic structures of the aggregates were characterized through methods such as calcination, sulfuric acid solution dry …
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Study on Strength and Micromorphology of Expansive Soil …
Scanning electron microscopy (SEM) analysis of the internal structure of the improved soil sample reveals that the cementitious material generated by cement hydration encapsulates the expansive ...
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How to Recycle and Process Coal Gangue: 7 Effective Ways
The crushed gangue is ground into powder and sent to be refined into bricks. In addition to the above 7 uses, coal gangue can also been found the uses in porous ceramics, soil conditioners, water treatment adsorbents, and power generation, etc.
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