Against the backdrop of achieving the goals of peak carbon emissions and carbon neutrality coal as the cornerstone of national energy security plays a crucial role in the green development of our country s economic construction and social development However during the process of coal mining and washing coal gangue as the primary associated by product of coal has
A large amount of coal gangue generated during coal production and processing is piled up on the surface which not only causes land occupation and soil erosion but also causes geological disasters such as landslides and debris flows So it has a serious impact on the ecological environment of the mining area The cumulative stockpile of coal gangue in China has
Coal mining and washing is accompanied by the production of large amounts of coal gangue which exerts a notable influence on the natural environment However as a form of solid waste coal gangue exhibits a wide range of potential applications in the field of recycling Nowadays the utilization rate and quality of coal gangue are inadequate and the disposal capacity and scale
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 accumulation in the food
The occurrence of gallium in gallium enriched coal gangue and the migration of gallium during thermal treatment were systematically studied The phase and chemical composition of gallium enriched coal gangue were determined and the gallium content was determined by inductively coupled plasma mass spectrometer ICP MS The mineralogical
The acid pollution produced from coal gangue piles is a global environmental problem Terminal technologies such as neutralization precipitation adsorption ion exchange membrane technology biological treatment and electrochemistry have been developed for acid mine drainage AMD treatment These technologies for treating pollutants with low
Via stratified sampling 135 samples were taken from the coal gangue which were selected by different weathering ages Based on the particle group division and quantitative tests of water
The comprehensive treatment capacity of coal gangue increases significantly and exceeds 400 Mt annually at present Due to large production of coal gangue however the existing utilizations cannot meet the demand of coal gangue treatment
CIESC Journal ›› 2023 Vol 74 ›› Issue 7 2783 2799 DOI / • Reviews and monographs • Previous Articles Next Articles Research progress on activation extraction of valuable metals in coal gangue Chao KANG 1 2 Jinpeng QIAO 1 2 Shengchao YANG 1 2 Chao PENG 1 2 Yuanpeng FU 3 Bin LIU 4 Jianrong LIU 5 Aleksandrova
The utilization amount of coal gangue was 480 million tons in 2013 accounting for 64% of the total output of which approximately 150 million tons of coal gangue were used for power generation 32% 56 million tons for the production of building materials 12% and 260 million tons for land reclamation 56% National Development and Reform
Top coal caving is a process for the rational extraction of large amounts of coal resources However this process readily causes release of excessive amounts of gangue during the coal release process The conventional technique which involves visual inspection is not only labor intensive but also can introduce inaccuracies Coal and gangue identification methods
The long term storage of coal gangue CG mountains causes serious environmental problems such as water and air pollution Thus sustainable reclamation practices are urgently needed to minimize the environmental impacts brought by CG mountains Pikovskaya medium was employed to screen microorganisms which were subsequently
Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications Producing concrete with coal gangue aggregate is one of the green sustainable development requirements This paper reviews the properties and preparation methods of Chinese gangue aggregate studies the influence of gangue aggregate on concrete
The acid pollution produced from coal gangue piles is a global environmental problem Terminal technologies such as neutralization precipitation adsorption ion exchange membrane technology biological treatment and electrochemistry have been developed for acid mine drainage AMD treatment These technologies for treating pollutants with low
DOI / Corpus ID 268922312; Closed loop cleaning treatment system — resource recovery of coal gangue article{Xu2024ClosedloopCT title={Closed loop cleaning treatment system — resource recovery of coal gangue} author={Fanghong Xu and Jin Xiao and Shengchao Ye and Wei Liu and Minge Yang and Zhen Yao and Qifan Zhong}
The coal gangue dump may introduce heavy metal oid s HMs into surrounding agricultural soils posing potential health risks to nearby communities This study evaluated heavy metal oid pollution
Process of filling goaf with coal gangue slurry The process of filling goaf with coal gangue slurry is shown in Fig the coal gangue is crushed by a multi stage crusher and enters
Figure 2 b and Fig 2 c depicts the device employed for the freeze thaw cycle treatment of coal gangue The impact of moisture variations on coal gangue weathering was scrutinized at room temperature 20 ℃ with moisture gradients assigned at 15% 30% and 50% of the saturated water absorption capacity culminating in four disparate gradients
Synthesis and development of high efficiency and low cost adsorbents for treating of the wastewater containing heavy metal ions and/or dyes has been aroused worldwide attention in recent years In this study the coal gangue as the only supply of Si and Al was adopted to synthesize sodalite using hydrothermal method Both the gangue and the
Coal gangue is an industrial waste produced during coal mining and washing processes [1 2] and presents environmental extraction of aluminum iron and other elements from it represents a significant method for resource utilization [3 4 5] However the extraction process results in the formation of acid leached residue which has the potential to
The long term storage of coal gangue CG mountains causes serious environmental problems such as water and air pollution Thus sustainable reclamation practices are urgently needed to minimize the environmental impacts brought by CG mountains Pikovskaya medium was employed to screen microorganisms which were subsequently
The soil nutrient status of the coal gangue treatment group was better than others This may be because coal gangue is rich in nutrient elements such as nitrogen phosphorus and potassium and the organic matter content of coal gangue is also relatively high Moreover coal gangue contains more organic carbon and weathering nutrients than topsoil
Coal gangue piles accumulate outside mines and can persist for years negatively impacting the regional environment To determine the main cause of soil pollution at coal gangues several coal
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