As coal and gangue are easy to be contaminated with slime during transportation in order to satisfy industrial requirements as far as possible we used vibrating screens for simple cleaning of coal and gangue surfaces to minimize the impact of slime and dust on image quality and maintain the appearance of the coal and gangue as possible when
Automated sorting equipment for coal gangue is progressively replacing large mechanized separation equipment a vibrating screen [5] air dense medium fluidized bed [6] and heavy medium wet separation method [7] for its high integration and identification and positioning have been confirmed as a vital technology in the automated
Sustainability 2022 14 1020 3 of 14 Sustainability 2022 14 x FOR PEER REVIEW 3 of 15 Figure 1 Study area and sampling sites of rock and soil in the mining pits
Coal gangue CG is a type of industrial solid waste produced by the process of coal excavation and separation 1 2 3 Generally one ton of CG is discarded for every 10 tons of produced coal 4 5
The accumulation of coal gangue poses significant environmental challenges due to its massive volume and low reactivity This study investigates the influence of calcium hydroxide Ca OH ₂ and gypsum on the mechanical properties hydration and pore structure of low carbon cementitious materials incorporating high volumes of calcined coal gangue CCG
Gangue is the main solid waste in coal mine areas In China there are more than 1700 coal waste piles totaling approximately billion tons with a rate of increase of 350 million tons per year [] The long term accumulation of a large amount of gangue will have a serious impact on the ecological environment of the mining area [2 3] For example after rain harmful
Underground backfilling stands out as a crucial technological strategy for the eco friendly and effective management of solid waste in mining operations However existing backfilling techniques have led to increased production processes at the working face resulting in a reduction in coal extraction efficiency Addressing the temporal and spatial interference
Coal gangue concrete is not rec ommended to be used in subsurface structures as its water absorption law would be changed under a large replacement ratio The mechanical performance of coal
Coal gangue is one of the most accumulated solid wastes in China its accumulation occupies a large amount of land resources and the potential environmental risks posed by coal gangue continue to rise In this study sequential extraction was employed to analyze the fractionation behavior of trace elements Cd Cr Cu Mn Ni Pb V and Zn The
Due to much higher mineral contents the mobility of trace elements in coal waste is expected to differ significantly from that in coal Li et al 2011;Zhou et al 2014;Pierwoła et al 2018
Investigation into trace element partitioning behavior from a coal gangue fired power plant in Shanxi province China has been conducted and showed that Hg As Be and Cd were highly volatile elements in the combustion of coalgangue which were notably enriched in fly ash and may be emitted into the environment via the gas phase
Coal gangue a waste produced during coal mining has been regarded as the largest source of industrial waste in China It is estimated that the production of 1 t coal generates t coal gangue [1] and the total stockpile of coal gangue exceeds 6 billion tons in China [2] [3] The coal gangue not only occupies agricultural land in large areas but triggers
Automated sorting equipment for coal gangue is progressively replacing large mechanized separation equipment a vibrating screen [5] air dense medium fluidized bed [6] and heavy medium wet separation method [7] for its high integration and identification and positioning have been confirmed as a vital technology in the automated
Coal gangue a by product produced during the coal processing has a serious impact on the environment Using coal gangue as a fertilizer has been proven helpful in potentially reducing its environmental impact and improving its value In this study the formation mechanism and influencing factors of coal gangue based silicon fertilizer was studied using XRD and FT
Some studies have used pre enrichment methods including gravity separation density fraction 17 and flotation 18 19 20 to extract REY in coal These methods can somewhat pre enrich REY but the results are relatively low and the recovery ratio is low 21 Wet leaching is an effective method of extracting REY from coal and coal gangue Pan et al 22
The typical unburned coal gangue in the Heilongjiang region is mainly composed of SiO2 Al2O3 and Fe2O3 which accounts for approximately 91% of the total mass The unburned coal gangue meets the
Coal gangue is a byproduct of mining process filling the gangue in the road embankment can reduce the pollution caused by the gangue accumulation Because the formation and type of rock is different the performance of gangue is different In this paper the main types of gangue of Handan & Xingtai coal mining area was taken laboratory test the
Coal gangue is the solid waste produced during coal mining and accounting for about 10 20% of total coal output It is estimated that about billion tons of coal gangue is produced globally in 2019 However only less than 30% of coal gangue is utilized
Coal gangue is a complex industrial solid waste discharged during excavation and washing of coal in the course of production The amount of coal gangue accumulated in China has exceeded 5 billion tons [1 2 3]; moreover the stockpile of gangue is still increasing at the rate of approximately billion tons per year [4 5] The disposal of such a large quantity of
DOI / Corpus ID 264318580; Investigating comparisons on the coal and gangue in various scenarios using multidimensional image features article{Lv2023InvestigatingCO title={Investigating comparisons on the coal and gangue in various scenarios using multidimensional image features} author={Ziqi Lv and Yao Cui and
With the continual advancement of coal resource development the comprehensive utilization of coal gangue as a by product encounters certain constraints A substantial amount of untreated coal gangue is openly stored particularly acidic gangue exposed to rainfall The leaching effect of acidic solutions containing heavy metal ions and other
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
coal gangue based silicon fertilizer and its reliability veri ed thereby providing a theoretical basis for use of coal gangue based silicon fertilizer in agriculture Materials and methods Materials Coal gangue The coal gangue used in the experiment comes from the Shendong mining area in Inner Mongolia China with an ash content of %
Findings indicated that the addition of bactericide effectively inhibited the oxidation of Fe2 preventing pH decreases and oxidation reduction potential increases Oxidation of pyrite in the coal gangue dumps usually results in acidification and spontaneous combustion causing many environmental problems such as air soil and water pollution The
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